From 415cfa23f232a1b0356a0634ffc6a3f0abcfd8c6 Mon Sep 17 00:00:00 2001
From: James Messinger <james.messinger@gmail.com>
Date: Thu, 31 Dec 2015 09:00:28 -0600
Subject: [PATCH] - Merged
 https://github.com/BigstickCarpet/json-schema-ref-parser/pull/5 - Made
 `options.http.withCredentials` false by default

---
 dist/ref-parser.js            | 973 +++++++++++++++++++---------------
 dist/ref-parser.js.map        |  62 ++-
 dist/ref-parser.min.js        | 146 ++---
 dist/ref-parser.min.js.map    |  64 ++-
 docs/options.md               |  26 +-
 lib/options.js                |  13 +-
 package.json                  |   2 +-
 tests/index.html              |   4 +-
 tests/specs/cors/cors.spec.js |  43 +-
 9 files changed, 735 insertions(+), 598 deletions(-)

diff --git a/dist/ref-parser.js b/dist/ref-parser.js
index b28bfbf3..06903815 100644
--- a/dist/ref-parser.js
+++ b/dist/ref-parser.js
@@ -1,6 +1,6 @@
 (function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.$RefParser = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
 /** !
- * JSON Schema $Ref Parser v1.4.0
+ * JSON Schema $Ref Parser v1.4.1
  *
  * @link https://github.com/BigstickCarpet/json-schema-ref-parser
  * @license MIT
@@ -48,7 +48,7 @@ function remap($refs, options) {
   // Now APPLY all of the re-mappings
   for (var i = 0; i < remapped.length; i++) {
     var mapping = remapped[i];
-    mapping.old.$ref = mapping.new.$ref;
+    mapping.old$Ref.$ref = mapping.new$Ref.$ref;
   }
 }
 
@@ -77,8 +77,8 @@ function crawl(obj, path, $refs, remapped, options) {
         var new$RefPath = pointer.$ref.pathFromRoot + util.path.getHash(pointer.path).substr(1);
         util.debug('    new value: %s', new$RefPath);
         remapped.push({
-          old: value,
-          new: {$ref: new$RefPath}
+          old$Ref: value,
+          new$Ref: {$ref: new$RefPath}  // Note: DON'T name this property `new` (https://github.com/BigstickCarpet/json-schema-ref-parser/issues/3)
         });
       }
       else {
@@ -106,7 +106,7 @@ function dereference(basePath, $refs, options) {
   });
 }
 
-},{"./pointer":6,"./ref":9,"./util":12,"url":90}],2:[function(require,module,exports){
+},{"./pointer":6,"./ref":9,"./util":12,"url":88}],2:[function(require,module,exports){
 'use strict';
 
 var $Ref    = require('./ref'),
@@ -240,7 +240,7 @@ function foundCircularReference(keyPath, $refs, options) {
   return true;
 }
 
-},{"./pointer":6,"./ref":9,"./util":12,"ono":65,"url":90}],3:[function(require,module,exports){
+},{"./pointer":6,"./ref":9,"./util":12,"ono":65,"url":88}],3:[function(require,module,exports){
 (function (Buffer){
 'use strict';
 
@@ -504,7 +504,7 @@ function normalizeArgs(args) {
 
 }).call(this,require("buffer").Buffer)
 
-},{"./bundle":1,"./dereference":2,"./options":4,"./promise":7,"./read":8,"./ref":9,"./refs":10,"./resolve":11,"./util":12,"./yaml":13,"buffer":17,"call-me-maybe":19,"ono":65,"url":90}],4:[function(require,module,exports){
+},{"./bundle":1,"./dereference":2,"./options":4,"./promise":7,"./read":8,"./ref":9,"./refs":10,"./resolve":11,"./util":12,"./yaml":13,"buffer":17,"call-me-maybe":20,"ono":65,"url":88}],4:[function(require,module,exports){
 /* eslint lines-around-comment: [2, {beforeBlockComment: false}] */
 'use strict';
 
@@ -599,11 +599,16 @@ function $RefParserOptions(options) {
     https: 5 * 60 // 5 minutes
   };
 
-  /* http options */
+  /**
+   * HTTP request options
+   */
   this.http = {
-    /* withCredentials option of XMLHttpRequest */
-    withCredentials: true
-  }
+    /**
+     * The `withCredentials` option of XMLHttpRequest.
+     * Set this to `true` if you're downloading files from a CORS-enabled server that requires authentication
+     */
+    withCredentials: false
+  };
 
   merge(options, this);
 }
@@ -962,13 +967,13 @@ function setValue(pointer, token, value) {
   return value;
 }
 
-},{"./ref":9,"./util":12,"ono":65,"url":90}],7:[function(require,module,exports){
+},{"./ref":9,"./util":12,"ono":65,"url":88}],7:[function(require,module,exports){
 'use strict';
 
 /** @type {Promise} **/
 module.exports = typeof Promise === 'function' ? Promise : require('es6-promise').Promise;
 
-},{"es6-promise":23}],8:[function(require,module,exports){
+},{"es6-promise":24}],8:[function(require,module,exports){
 (function (process,Buffer){
 'use strict';
 
@@ -1210,7 +1215,7 @@ function download(protocol, u, options) {
 
 }).call(this,require('_process'),require("buffer").Buffer)
 
-},{"./parse":5,"./promise":7,"./ref":9,"./util":12,"_process":67,"buffer":17,"fs":16,"http":83,"https":27,"ono":65,"url":90}],9:[function(require,module,exports){
+},{"./parse":5,"./promise":7,"./ref":9,"./util":12,"_process":67,"buffer":17,"fs":16,"http":83,"https":27,"ono":65,"url":88}],9:[function(require,module,exports){
 'use strict';
 
 module.exports = $Ref;
@@ -1729,7 +1734,7 @@ function crawl$Ref(path, pathFromRoot, $refs, options) {
     });
 }
 
-},{"./pointer":6,"./promise":7,"./read":8,"./ref":9,"./util":12,"ono":65,"url":90}],12:[function(require,module,exports){
+},{"./pointer":6,"./promise":7,"./read":8,"./ref":9,"./util":12,"ono":65,"url":88}],12:[function(require,module,exports){
 (function (process){
 'use strict';
 
@@ -1864,11 +1869,12 @@ exports.path.extname = function extname(path) {
 
 }).call(this,require('_process'))
 
-},{"_process":67,"debug":21}],13:[function(require,module,exports){
+},{"_process":67,"debug":22}],13:[function(require,module,exports){
 /* eslint lines-around-comment: [2, {beforeBlockComment: false}] */
 'use strict';
 
-var yaml = require('js-yaml');
+var yaml = require('js-yaml'),
+    ono  = require('ono');
 
 /**
  * Simple YAML parsing functions, similar to {@link JSON.parse} and {@link JSON.stringify}
@@ -1882,7 +1888,18 @@ module.exports = {
    * @returns {*}
    */
   parse: function yamlParse(text, reviver) {
-    return yaml.safeLoad(text);
+    try {
+      return yaml.safeLoad(text);
+    }
+    catch (e) {
+      if (e instanceof Error) {
+        throw e;
+      }
+      else {
+        // https://github.com/nodeca/js-yaml/issues/153
+        throw ono(e, e.message);
+      }
+    }
   },
 
   /**
@@ -1894,12 +1911,23 @@ module.exports = {
    * @returns {string}
    */
   stringify: function yamlStringify(value, replacer, space) {
-    var indent = (typeof space === 'string' ? space.length : space) || 2;
-    return yaml.safeDump(value, {indent: indent});
+    try {
+      var indent = (typeof space === 'string' ? space.length : space) || 2;
+      return yaml.safeDump(value, {indent: indent});
+    }
+    catch (e) {
+      if (e instanceof Error) {
+        throw e;
+      }
+      else {
+        // https://github.com/nodeca/js-yaml/issues/153
+        throw ono(e, e.message);
+      }
+    }
   }
 };
 
-},{"js-yaml":34}],14:[function(require,module,exports){
+},{"js-yaml":34,"ono":65}],14:[function(require,module,exports){
 var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
 
 ;(function (exports) {
@@ -2039,9 +2067,11 @@ arguments[4][15][0].apply(exports,arguments)
  */
 /* eslint-disable no-proto */
 
+'use strict'
+
 var base64 = require('base64-js')
 var ieee754 = require('ieee754')
-var isArray = require('is-array')
+var isArray = require('isarray')
 
 exports.Buffer = Buffer
 exports.SlowBuffer = SlowBuffer
@@ -2121,8 +2151,10 @@ function Buffer (arg) {
     return new Buffer(arg)
   }
 
-  this.length = 0
-  this.parent = undefined
+  if (!Buffer.TYPED_ARRAY_SUPPORT) {
+    this.length = 0
+    this.parent = undefined
+  }
 
   // Common case.
   if (typeof arg === 'number') {
@@ -2253,6 +2285,10 @@ function fromJsonObject (that, object) {
 if (Buffer.TYPED_ARRAY_SUPPORT) {
   Buffer.prototype.__proto__ = Uint8Array.prototype
   Buffer.__proto__ = Uint8Array
+} else {
+  // pre-set for values that may exist in the future
+  Buffer.prototype.length = undefined
+  Buffer.prototype.parent = undefined
 }
 
 function allocate (that, length) {
@@ -2403,10 +2439,6 @@ function byteLength (string, encoding) {
 }
 Buffer.byteLength = byteLength
 
-// pre-set for values that may exist in the future
-Buffer.prototype.length = undefined
-Buffer.prototype.parent = undefined
-
 function slowToString (encoding, start, end) {
   var loweredCase = false
 
@@ -3498,7 +3530,7 @@ function utf8ToBytes (string, units) {
       }
 
       // valid surrogate pair
-      codePoint = leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00 | 0x10000
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
     } else if (leadSurrogate) {
       // valid bmp char, but last char was a lead
       if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
@@ -3578,7 +3610,14 @@ function blitBuffer (src, dst, offset, length) {
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{"base64-js":14,"ieee754":28,"is-array":31}],18:[function(require,module,exports){
+},{"base64-js":14,"ieee754":28,"isarray":18}],18:[function(require,module,exports){
+var toString = {}.toString;
+
+module.exports = Array.isArray || function (arr) {
+  return toString.call(arr) == '[object Array]';
+};
+
+},{}],19:[function(require,module,exports){
 module.exports = {
   "100": "Continue",
   "101": "Switching Protocols",
@@ -3639,7 +3678,7 @@ module.exports = {
   "511": "Network Authentication Required"
 }
 
-},{}],19:[function(require,module,exports){
+},{}],20:[function(require,module,exports){
 (function (process,global){
 "use strict"
 
@@ -3664,7 +3703,7 @@ module.exports = function maybe (cb, promise) {
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{"_process":67}],20:[function(require,module,exports){
+},{"_process":67}],21:[function(require,module,exports){
 (function (Buffer){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -3689,8 +3728,12 @@ module.exports = function maybe (cb, promise) {
 
 // NOTE: These type checking functions intentionally don't use `instanceof`
 // because it is fragile and can be easily faked with `Object.create()`.
-function isArray(ar) {
-  return Array.isArray(ar);
+
+function isArray(arg) {
+  if (Array.isArray) {
+    return Array.isArray(arg);
+  }
+  return objectToString(arg) === '[object Array]';
 }
 exports.isArray = isArray;
 
@@ -3730,7 +3773,7 @@ function isUndefined(arg) {
 exports.isUndefined = isUndefined;
 
 function isRegExp(re) {
-  return isObject(re) && objectToString(re) === '[object RegExp]';
+  return objectToString(re) === '[object RegExp]';
 }
 exports.isRegExp = isRegExp;
 
@@ -3740,13 +3783,12 @@ function isObject(arg) {
 exports.isObject = isObject;
 
 function isDate(d) {
-  return isObject(d) && objectToString(d) === '[object Date]';
+  return objectToString(d) === '[object Date]';
 }
 exports.isDate = isDate;
 
 function isError(e) {
-  return isObject(e) &&
-      (objectToString(e) === '[object Error]' || e instanceof Error);
+  return (objectToString(e) === '[object Error]' || e instanceof Error);
 }
 exports.isError = isError;
 
@@ -3765,17 +3807,15 @@ function isPrimitive(arg) {
 }
 exports.isPrimitive = isPrimitive;
 
-function isBuffer(arg) {
-  return Buffer.isBuffer(arg);
-}
-exports.isBuffer = isBuffer;
+exports.isBuffer = Buffer.isBuffer;
 
 function objectToString(o) {
   return Object.prototype.toString.call(o);
 }
+
 }).call(this,{"isBuffer":require("../../is-buffer/index.js")})
 
-},{"../../is-buffer/index.js":32}],21:[function(require,module,exports){
+},{"../../is-buffer/index.js":32}],22:[function(require,module,exports){
 
 /**
  * This is the web browser implementation of `debug()`.
@@ -3945,7 +3985,7 @@ function localstorage(){
   } catch (e) {}
 }
 
-},{"./debug":22}],22:[function(require,module,exports){
+},{"./debug":23}],23:[function(require,module,exports){
 
 /**
  * This is the common logic for both the Node.js and web browser
@@ -4144,7 +4184,7 @@ function coerce(val) {
   return val;
 }
 
-},{"ms":64}],23:[function(require,module,exports){
+},{"ms":64}],24:[function(require,module,exports){
 (function (process,global){
 /*!
  * @overview es6-promise - a tiny implementation of Promises/A+.
@@ -5116,7 +5156,7 @@ function coerce(val) {
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{"_process":67}],24:[function(require,module,exports){
+},{"_process":67}],25:[function(require,module,exports){
 /*
   Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.
 
@@ -8382,6 +8422,9 @@ function coerce(val) {
             if (!strict && state.allowYield && matchKeyword('yield')) {
                 return parseNonComputedProperty();
             }
+            if (!strict && matchKeyword('let')) {
+                return node.finishIdentifier(lex().value);
+            }
             isAssignmentTarget = isBindingElement = false;
             if (matchKeyword('function')) {
                 return parseFunctionExpression();
@@ -8393,9 +8436,6 @@ function coerce(val) {
             if (matchKeyword('class')) {
                 return parseClassExpression();
             }
-            if (!strict && matchKeyword('let')) {
-                return node.finishIdentifier(lex().value);
-            }
             throwUnexpectedToken(lex());
         } else if (type === Token.BooleanLiteral) {
             isAssignmentTarget = isBindingElement = false;
@@ -8973,6 +9013,7 @@ function coerce(val) {
 
         argument = null;
         expr = new Node();
+        delegate = false;
 
         expectKeyword('yield');
 
@@ -9178,15 +9219,15 @@ function coerce(val) {
     }
 
     function parseVariableDeclarationList(options) {
-        var list = [];
+        var opt, list;
 
-        do {
-            list.push(parseVariableDeclaration({ inFor: options.inFor }));
-            if (!match(',')) {
-                break;
-            }
+        opt = { inFor: options.inFor };
+        list = [parseVariableDeclaration(opt)];
+
+        while (match(',')) {
             lex();
-        } while (startIndex < length);
+            list.push(parseVariableDeclaration(opt));
+        }
 
         return list;
     }
@@ -9229,15 +9270,12 @@ function coerce(val) {
     }
 
     function parseBindingList(kind, options) {
-        var list = [];
+        var list = [parseLexicalBinding(kind, options)];
 
-        do {
-            list.push(parseLexicalBinding(kind, options));
-            if (!match(',')) {
-                break;
-            }
+        while (match(',')) {
             lex();
-        } while (startIndex < length);
+            list.push(parseLexicalBinding(kind, options));
+        }
 
         return list;
     }
@@ -10830,7 +10868,7 @@ function coerce(val) {
     }
 
     // Sync with *.json manifests.
-    exports.version = '2.7.0';
+    exports.version = '2.7.1';
 
     exports.tokenize = tokenize;
 
@@ -10861,7 +10899,7 @@ function coerce(val) {
 }));
 /* vim: set sw=4 ts=4 et tw=80 : */
 
-},{}],25:[function(require,module,exports){
+},{}],26:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -10945,18 +10983,11 @@ EventEmitter.prototype.emit = function(type) {
         break;
       // slower
       default:
-        len = arguments.length;
-        args = new Array(len - 1);
-        for (i = 1; i < len; i++)
-          args[i - 1] = arguments[i];
+        args = Array.prototype.slice.call(arguments, 1);
         handler.apply(this, args);
     }
   } else if (isObject(handler)) {
-    len = arguments.length;
-    args = new Array(len - 1);
-    for (i = 1; i < len; i++)
-      args[i - 1] = arguments[i];
-
+    args = Array.prototype.slice.call(arguments, 1);
     listeners = handler.slice();
     len = listeners.length;
     for (i = 0; i < len; i++)
@@ -10994,7 +11025,6 @@ EventEmitter.prototype.addListener = function(type, listener) {
 
   // Check for listener leak
   if (isObject(this._events[type]) && !this._events[type].warned) {
-    var m;
     if (!isUndefined(this._maxListeners)) {
       m = this._maxListeners;
     } else {
@@ -11116,7 +11146,7 @@ EventEmitter.prototype.removeAllListeners = function(type) {
 
   if (isFunction(listeners)) {
     this.removeListener(type, listeners);
-  } else {
+  } else if (listeners) {
     // LIFO order
     while (listeners.length)
       this.removeListener(type, listeners[listeners.length - 1]);
@@ -11137,15 +11167,20 @@ EventEmitter.prototype.listeners = function(type) {
   return ret;
 };
 
+EventEmitter.prototype.listenerCount = function(type) {
+  if (this._events) {
+    var evlistener = this._events[type];
+
+    if (isFunction(evlistener))
+      return 1;
+    else if (evlistener)
+      return evlistener.length;
+  }
+  return 0;
+};
+
 EventEmitter.listenerCount = function(emitter, type) {
-  var ret;
-  if (!emitter._events || !emitter._events[type])
-    ret = 0;
-  else if (isFunction(emitter._events[type]))
-    ret = 1;
-  else
-    ret = emitter._events[type].length;
-  return ret;
+  return emitter.listenerCount(type);
 };
 
 function isFunction(arg) {
@@ -11164,30 +11199,6 @@ function isUndefined(arg) {
   return arg === void 0;
 }
 
-},{}],26:[function(require,module,exports){
-
-var hasOwn = Object.prototype.hasOwnProperty;
-var toString = Object.prototype.toString;
-
-module.exports = function forEach (obj, fn, ctx) {
-    if (toString.call(fn) !== '[object Function]') {
-        throw new TypeError('iterator must be a function');
-    }
-    var l = obj.length;
-    if (l === +l) {
-        for (var i = 0; i < l; i++) {
-            fn.call(ctx, obj[i], i, obj);
-        }
-    } else {
-        for (var k in obj) {
-            if (hasOwn.call(obj, k)) {
-                fn.call(ctx, obj[k], k, obj);
-            }
-        }
-    }
-};
-
-
 },{}],27:[function(require,module,exports){
 var http = require('http');
 
@@ -11291,17 +11302,205 @@ exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
 }
 
 },{}],29:[function(require,module,exports){
+/*!
+ * node-inherit
+ * Copyright(c) 2011 Dmitry Filatov <dfilatov@yandex-team.ru>
+ * MIT Licensed
+ */
 
-var indexOf = [].indexOf;
+module.exports = require('./lib/inherit');
 
-module.exports = function(arr, obj){
-  if (indexOf) return arr.indexOf(obj);
-  for (var i = 0; i < arr.length; ++i) {
-    if (arr[i] === obj) return i;
-  }
-  return -1;
+},{"./lib/inherit":30}],30:[function(require,module,exports){
+/**
+ * @module inherit
+ * @version 2.2.2
+ * @author Filatov Dmitry <dfilatov@yandex-team.ru>
+ * @description This module provides some syntax sugar for "class" declarations, constructors, mixins, "super" calls and static members.
+ */
+
+(function(global) {
+
+var hasIntrospection = (function(){'_';}).toString().indexOf('_') > -1,
+    emptyBase = function() {},
+    hasOwnProperty = Object.prototype.hasOwnProperty,
+    objCreate = Object.create || function(ptp) {
+        var inheritance = function() {};
+        inheritance.prototype = ptp;
+        return new inheritance();
+    },
+    objKeys = Object.keys || function(obj) {
+        var res = [];
+        for(var i in obj) {
+            hasOwnProperty.call(obj, i) && res.push(i);
+        }
+        return res;
+    },
+    extend = function(o1, o2) {
+        for(var i in o2) {
+            hasOwnProperty.call(o2, i) && (o1[i] = o2[i]);
+        }
+
+        return o1;
+    },
+    toStr = Object.prototype.toString,
+    isArray = Array.isArray || function(obj) {
+        return toStr.call(obj) === '[object Array]';
+    },
+    isFunction = function(obj) {
+        return toStr.call(obj) === '[object Function]';
+    },
+    noOp = function() {},
+    needCheckProps = true,
+    testPropObj = { toString : '' };
+
+for(var i in testPropObj) { // fucking ie hasn't toString, valueOf in for
+    testPropObj.hasOwnProperty(i) && (needCheckProps = false);
+}
+
+var specProps = needCheckProps? ['toString', 'valueOf'] : null;
+
+function getPropList(obj) {
+    var res = objKeys(obj);
+    if(needCheckProps) {
+        var specProp, i = 0;
+        while(specProp = specProps[i++]) {
+            obj.hasOwnProperty(specProp) && res.push(specProp);
+        }
+    }
+
+    return res;
+}
+
+function override(base, res, add) {
+    var addList = getPropList(add),
+        j = 0, len = addList.length,
+        name, prop;
+    while(j < len) {
+        if((name = addList[j++]) === '__self') {
+            continue;
+        }
+        prop = add[name];
+        if(isFunction(prop) &&
+                (!hasIntrospection || prop.toString().indexOf('.__base') > -1)) {
+            res[name] = (function(name, prop) {
+                var baseMethod = base[name]?
+                        base[name] :
+                        name === '__constructor'? // case of inheritance from plane function
+                            res.__self.__parent :
+                            noOp;
+                return function() {
+                    var baseSaved = this.__base;
+                    this.__base = baseMethod;
+                    var res = prop.apply(this, arguments);
+                    this.__base = baseSaved;
+                    return res;
+                };
+            })(name, prop);
+        } else {
+            res[name] = prop;
+        }
+    }
+}
+
+function applyMixins(mixins, res) {
+    var i = 1, mixin;
+    while(mixin = mixins[i++]) {
+        res?
+            isFunction(mixin)?
+                inherit.self(res, mixin.prototype, mixin) :
+                inherit.self(res, mixin) :
+            res = isFunction(mixin)?
+                inherit(mixins[0], mixin.prototype, mixin) :
+                inherit(mixins[0], mixin);
+    }
+    return res || mixins[0];
+}
+
+/**
+* Creates class
+* @exports
+* @param {Function|Array} [baseClass|baseClassAndMixins] class (or class and mixins) to inherit from
+* @param {Object} prototypeFields
+* @param {Object} [staticFields]
+* @returns {Function} class
+*/
+function inherit() {
+    var args = arguments,
+        withMixins = isArray(args[0]),
+        hasBase = withMixins || isFunction(args[0]),
+        base = hasBase? withMixins? applyMixins(args[0]) : args[0] : emptyBase,
+        props = args[hasBase? 1 : 0] || {},
+        staticProps = args[hasBase? 2 : 1],
+        res = props.__constructor || (hasBase && base.prototype.__constructor)?
+            function() {
+                return this.__constructor.apply(this, arguments);
+            } :
+            hasBase?
+                function() {
+                    return base.apply(this, arguments);
+                } :
+                function() {};
+
+    if(!hasBase) {
+        res.prototype = props;
+        res.prototype.__self = res.prototype.constructor = res;
+        return extend(res, staticProps);
+    }
+
+    extend(res, base);
+
+    res.__parent = base;
+
+    var basePtp = base.prototype,
+        resPtp = res.prototype = objCreate(basePtp);
+
+    resPtp.__self = resPtp.constructor = res;
+
+    props && override(basePtp, resPtp, props);
+    staticProps && override(base, res, staticProps);
+
+    return res;
+}
+
+inherit.self = function() {
+    var args = arguments,
+        withMixins = isArray(args[0]),
+        base = withMixins? applyMixins(args[0], args[0][0]) : args[0],
+        props = args[1],
+        staticProps = args[2],
+        basePtp = base.prototype;
+
+    props && override(basePtp, basePtp, props);
+    staticProps && override(base, base, staticProps);
+
+    return base;
 };
-},{}],30:[function(require,module,exports){
+
+var defineAsGlobal = true;
+if(typeof exports === 'object') {
+    module.exports = inherit;
+    defineAsGlobal = false;
+}
+
+if(typeof modules === 'object') {
+    modules.define('inherit', function(provide) {
+        provide(inherit);
+    });
+    defineAsGlobal = false;
+}
+
+if(typeof define === 'function') {
+    define(function(require, exports, module) {
+        module.exports = inherit;
+    });
+    defineAsGlobal = false;
+}
+
+defineAsGlobal && (global.inherit = inherit);
+
+})(this);
+
+},{}],31:[function(require,module,exports){
 if (typeof Object.create === 'function') {
   // implementation from standard node.js 'util' module
   module.exports = function inherits(ctor, superCtor) {
@@ -11326,41 +11525,6 @@ if (typeof Object.create === 'function') {
   }
 }
 
-},{}],31:[function(require,module,exports){
-
-/**
- * isArray
- */
-
-var isArray = Array.isArray;
-
-/**
- * toString
- */
-
-var str = Object.prototype.toString;
-
-/**
- * Whether or not the given `val`
- * is an array.
- *
- * example:
- *
- *        isArray([]);
- *        // > true
- *        isArray(arguments);
- *        // > false
- *        isArray('');
- *        // > false
- *
- * @param {mixed} val
- * @return {bool}
- */
-
-module.exports = isArray || function (val) {
-  return !! val && '[object Array]' == str.call(val);
-};
-
 },{}],32:[function(require,module,exports){
 /**
  * Determine if an object is Buffer
@@ -11616,6 +11780,7 @@ function State(options) {
   this.flowLevel   = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
   this.styleMap    = compileStyleMap(this.schema, options['styles'] || null);
   this.sortKeys    = options['sortKeys'] || false;
+  this.lineWidth    = options['lineWidth'] || 80;
 
   this.implicitTypes = this.schema.compiledImplicit;
   this.explicitTypes = this.schema.compiledExplicit;
@@ -11757,7 +11922,13 @@ function writeScalar(state, object, level, iskey) {
   longestLine = 0;
 
   indent = state.indent * level;
-  max = 80;
+  max = state.lineWidth;
+  if (max === -1) {
+    // Replace -1 with biggest ingeger number according to
+    // http://ecma262-5.com/ELS5_HTML.htm#Section_8.5
+    max = 9007199254740991;
+  }
+
   if (indent < 40) {
     max -= indent;
   } else {
@@ -12347,7 +12518,7 @@ module.exports.safeDump = safeDump;
 'use strict';
 
 
-var inherits = require('util').inherits;
+var inherits = require('inherit');
 
 
 function YAMLException(reason, mark) {
@@ -12389,7 +12560,7 @@ YAMLException.prototype.toString = function toString(compact) {
 
 module.exports = YAMLException;
 
-},{"util":93}],39:[function(require,module,exports){
+},{"inherit":29}],39:[function(require,module,exports){
 'use strict';
 
 /*eslint-disable max-len,no-use-before-define*/
@@ -12644,6 +12815,8 @@ function captureSegment(state, start, end, checkJson) {
           throwError(state, 'expected valid JSON character');
         }
       }
+    } else if (PATTERN_NON_PRINTABLE.test(_result)) {
+      throwError(state, 'the stream contains non-printable characters');
     }
 
     state.result += _result;
@@ -13914,10 +14087,6 @@ function loadDocuments(input, options) {
 
   var state = new State(input, options);
 
-  if (PATTERN_NON_PRINTABLE.test(state.input)) {
-    throwError(state, 'the stream contains non-printable characters');
-  }
-
   // Use 0 as string terminator. That significantly simplifies bounds check.
   state.input += '\0';
 
@@ -14578,7 +14747,12 @@ function constructYamlFloat(data) {
   return sign * parseFloat(value, 10);
 }
 
+
+var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;
+
 function representYamlFloat(object, style) {
+  var res;
+
   if (isNaN(object)) {
     switch (style) {
     case 'lowercase':
@@ -14609,7 +14783,13 @@ function representYamlFloat(object, style) {
   } else if (common.isNegativeZero(object)) {
     return '-0.0';
   }
-  return object.toString(10);
+
+  res = object.toString(10);
+
+  // JS stringifier can build scientific format without dots: 5e-100,
+  // while YAML requres dot: 5.e-100. Fix it with simple hack
+
+  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
 }
 
 function isFloat(object) {
@@ -14897,7 +15077,7 @@ module.exports = new Type('tag:yaml.org,2002:js/function', {
   represent: representJavascriptFunction
 });
 
-},{"../../type":47,"esprima":24}],53:[function(require,module,exports){
+},{"../../type":47,"esprima":25}],53:[function(require,module,exports){
 'use strict';
 
 var Type = require('../../type');
@@ -15474,7 +15654,7 @@ function plural(ms, n, name) {
 
 },{}],65:[function(require,module,exports){
 /**!
- * Ono v1.0.22
+ * Ono v2.0.1
  *
  * @link https://github.com/BigstickCarpet/ono
  * @license MIT
@@ -15482,7 +15662,11 @@ function plural(ms, n, name) {
 'use strict';
 
 var util  = require('util'),
-    slice = Array.prototype.slice;
+    slice = Array.prototype.slice,
+    vendorSpecificErrorProperties = [
+      'name', 'message', 'description', 'number', 'fileName', 'lineNumber', 'columnNumber',
+      'sourceURL', 'line', 'column', 'stack'
+    ];
 
 module.exports = create(Error);
 module.exports.error = create(Error);
@@ -15529,38 +15713,78 @@ function create(Klass) {
     }
 
     if (err) {
-      // The inner-error's message and stack will be added to the new error
+      // The inner-error's message will be added to the new message
       formattedMessage += (formattedMessage ? ' \n' : '') + err.message;
-      stack = err.stack;
     }
 
-    var error = new Klass(formattedMessage);
-    extendError(error, stack, props);
-    return error;
+    // Create the new error
+    // NOTE: DON'T move this to a separate function! We don't want to pollute the stack trace
+    var newError = new Klass(formattedMessage);
+
+    // Extend the new error with the additional properties
+    extendError(newError, err);   // Copy properties of the original error
+    extendToJSON(newError);       // Replace the original toJSON method
+    extend(newError, props);      // Copy custom properties, possibly including a custom toJSON method
+
+    return newError;
   };
 }
 
 /**
- * Extends the given Error object with the given values
+ * Extends the targetError with the properties of the source error.
  *
- * @param {Error}   error - The error object to extend
- * @param {?string} stack - The stack trace from the original error
- * @param {?object} props - Properties to add to the error object
+ * @param {Error}   targetError - The error object to extend
+ * @param {?Error}  sourceError - The source error object, if any
  */
-function extendError(error, stack, props) {
-  if (stack) {
-    error.stack += ' \n\n' + stack;
+function extendError(targetError, sourceError) {
+  if (sourceError) {
+    var stack = sourceError.stack;
+    if (stack) {
+      targetError.stack += ' \n\n' + sourceError.stack;
+    }
+
+    extend(targetError, sourceError, true);
   }
+}
 
-  if (props && typeof(props) === 'object') {
-    var keys = Object.keys(props);
+/**
+ * JavaScript engines differ in how errors are serialized to JSON - especially when it comes
+ * to custom error properties and stack traces.  So we add our own toJSON method that ALWAYS
+ * outputs every property of the error.
+ */
+function extendToJSON(error) {
+  error.toJSON = errorToJSON;
+
+  // Also add an inspect() method, for compatibility with Node.js' `util.inspect()` method
+  error.inspect = errorToJSON;
+}
+
+/**
+ * Extends the target object with the properties of the source object.
+ *
+ * @param {object}  target - The object to extend
+ * @param {?source} source - The object whose properties are copied
+ * @param {boolean} omitVendorSpecificProperties - Skip vendor-specific Error properties
+ */
+function extend(target, source, omitVendorSpecificProperties) {
+  if (source && typeof(source) === 'object') {
+    var keys = Object.keys(source);
     for (var i = 0; i < keys.length; i++) {
       var key = keys[i];
-      error[key] = props[key];
+
+      // Don't bother trying to copy read-only vendor-specific Error properties
+      if (omitVendorSpecificProperties && vendorSpecificErrorProperties.indexOf(key) >= 0) {
+        continue;
+      }
+
+      try {
+        target[key] = source[key];
+      }
+      catch (e) {
+        // This property is read-only, so it can't be copied
+      }
     }
   }
-
-  error.toJSON = errorToJSON;
 }
 
 /**
@@ -15571,18 +15795,13 @@ function extendError(error, stack, props) {
  */
 function errorToJSON() {
   // jshint -W040
+  var json = {};
 
-  // All Errors have "name" and "message"
-  var json = {
-    name: this.name,
-    message: this.message
-  };
-
-  // Append any custom properties that were added
+  // Get all the properties of this error
   var keys = Object.keys(this);
 
-  // Also include any vendor-specific Error properties
-  keys = keys.concat(['description', 'number', 'fileName', 'lineNumber', 'columnNumber', 'stack']);
+  // Also include vendor-specific properties from the prototype
+  keys = keys.concat(vendorSpecificErrorProperties);
 
   for (var i = 0; i < keys.length; i++) {
     var key = keys[i];
@@ -15595,10 +15814,17 @@ function errorToJSON() {
   return json;
 }
 
-},{"util":93}],66:[function(require,module,exports){
+},{"util":92}],66:[function(require,module,exports){
 (function (process){
 'use strict';
-module.exports = nextTick;
+
+if (!process.version ||
+    process.version.indexOf('v0.') === 0 ||
+    process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {
+  module.exports = nextTick;
+} else {
+  module.exports = process.nextTick;
+}
 
 function nextTick(fn) {
   var args = new Array(arguments.length - 1);
@@ -15708,7 +15934,7 @@ process.umask = function() { return 0; };
 
 },{}],68:[function(require,module,exports){
 (function (global){
-/*! https://mths.be/punycode v1.3.2 by @mathias */
+/*! https://mths.be/punycode v1.4.0 by @mathias */
 ;(function(root) {
 
 	/** Detect free variables */
@@ -15774,7 +16000,7 @@ process.umask = function() { return 0; };
 	 * @returns {Error} Throws a `RangeError` with the applicable error message.
 	 */
 	function error(type) {
-		throw RangeError(errors[type]);
+		throw new RangeError(errors[type]);
 	}
 
 	/**
@@ -15921,7 +16147,7 @@ process.umask = function() { return 0; };
 
 	/**
 	 * Bias adaptation function as per section 3.4 of RFC 3492.
-	 * http://tools.ietf.org/html/rfc3492#section-3.4
+	 * https://tools.ietf.org/html/rfc3492#section-3.4
 	 * @private
 	 */
 	function adapt(delta, numPoints, firstTime) {
@@ -16226,14 +16452,17 @@ process.umask = function() { return 0; };
 			return punycode;
 		});
 	} else if (freeExports && freeModule) {
-		if (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+
+		if (module.exports == freeExports) {
+			// in Node.js, io.js, or RingoJS v0.8.0+
 			freeModule.exports = punycode;
-		} else { // in Narwhal or RingoJS v0.7.0-
+		} else {
+			// in Narwhal or RingoJS v0.7.0-
 			for (key in punycode) {
 				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
 			}
 		}
-	} else { // in Rhino or a web browser
+	} else {
+		// in Rhino or a web browser
 		root.punycode = punycode;
 	}
 
@@ -16507,7 +16736,7 @@ function forEach (xs, f) {
   }
 }
 
-},{"./_stream_readable":75,"./_stream_writable":77,"core-util-is":20,"inherits":30,"process-nextick-args":66}],74:[function(require,module,exports){
+},{"./_stream_readable":75,"./_stream_writable":77,"core-util-is":21,"inherits":31,"process-nextick-args":66}],74:[function(require,module,exports){
 // a passthrough stream.
 // basically just the most minimal sort of Transform stream.
 // Every written chunk gets output as-is.
@@ -16536,7 +16765,7 @@ PassThrough.prototype._transform = function(chunk, encoding, cb) {
   cb(null, chunk);
 };
 
-},{"./_stream_transform":76,"core-util-is":20,"inherits":30}],75:[function(require,module,exports){
+},{"./_stream_transform":76,"core-util-is":21,"inherits":31}],75:[function(require,module,exports){
 (function (process){
 'use strict';
 
@@ -16601,8 +16830,9 @@ var StringDecoder;
 
 util.inherits(Readable, Stream);
 
+var Duplex;
 function ReadableState(options, stream) {
-  var Duplex = require('./_stream_duplex');
+  Duplex = Duplex || require('./_stream_duplex');
 
   options = options || {};
 
@@ -16668,8 +16898,9 @@ function ReadableState(options, stream) {
   }
 }
 
+var Duplex;
 function Readable(options) {
-  var Duplex = require('./_stream_duplex');
+  Duplex = Duplex || require('./_stream_duplex');
 
   if (!(this instanceof Readable))
     return new Readable(options);
@@ -17514,7 +17745,7 @@ function indexOf (xs, x) {
 
 }).call(this,require('_process'))
 
-},{"./_stream_duplex":73,"_process":67,"buffer":17,"core-util-is":20,"events":25,"inherits":30,"isarray":33,"process-nextick-args":66,"string_decoder/":89,"util":15}],76:[function(require,module,exports){
+},{"./_stream_duplex":73,"_process":67,"buffer":17,"core-util-is":21,"events":26,"inherits":31,"isarray":33,"process-nextick-args":66,"string_decoder/":87,"util":15}],76:[function(require,module,exports){
 // a transform stream is a readable/writable stream where you do
 // something with the data.  Sometimes it's called a "filter",
 // but that's not a great name for it, since that implies a thing where
@@ -17713,7 +17944,7 @@ function done(stream, er) {
   return stream.push(null);
 }
 
-},{"./_stream_duplex":73,"core-util-is":20,"inherits":30}],77:[function(require,module,exports){
+},{"./_stream_duplex":73,"core-util-is":21,"inherits":31}],77:[function(require,module,exports){
 // A bit simpler than readable streams.
 // Implement an async ._write(chunk, encoding, cb), and it'll handle all
 // the drain event emission and buffering.
@@ -17771,8 +18002,9 @@ function WriteReq(chunk, encoding, cb) {
   this.next = null;
 }
 
+var Duplex;
 function WritableState(options, stream) {
-  var Duplex = require('./_stream_duplex');
+  Duplex = Duplex || require('./_stream_duplex');
 
   options = options || {};
 
@@ -17880,8 +18112,9 @@ Object.defineProperty(WritableState.prototype, 'buffer', {
 }catch(_){}}());
 
 
+var Duplex;
 function Writable(options) {
-  var Duplex = require('./_stream_duplex');
+  Duplex = Duplex || require('./_stream_duplex');
 
   // Writable ctor is applied to Duplexes, though they're not
   // instanceof Writable, they're instanceof Readable.
@@ -18242,7 +18475,7 @@ function endWritable(stream, state, cb) {
   state.ended = true;
 }
 
-},{"./_stream_duplex":73,"buffer":17,"core-util-is":20,"events":25,"inherits":30,"process-nextick-args":66,"util-deprecate":91}],78:[function(require,module,exports){
+},{"./_stream_duplex":73,"buffer":17,"core-util-is":21,"events":26,"inherits":31,"process-nextick-args":66,"util-deprecate":90}],78:[function(require,module,exports){
 module.exports = require("./lib/_stream_passthrough.js")
 
 },{"./lib/_stream_passthrough.js":74}],79:[function(require,module,exports){
@@ -18394,7 +18627,7 @@ Stream.prototype.pipe = function(dest, options) {
   return dest;
 };
 
-},{"events":25,"inherits":30,"readable-stream/duplex.js":72,"readable-stream/passthrough.js":78,"readable-stream/readable.js":79,"readable-stream/transform.js":80,"readable-stream/writable.js":81}],83:[function(require,module,exports){
+},{"events":26,"inherits":31,"readable-stream/duplex.js":72,"readable-stream/passthrough.js":78,"readable-stream/readable.js":79,"readable-stream/transform.js":80,"readable-stream/writable.js":81}],83:[function(require,module,exports){
 var ClientRequest = require('./lib/request')
 var extend = require('xtend')
 var statusCodes = require('builtin-status-codes')
@@ -18469,7 +18702,7 @@ http.METHODS = [
 	'UNLOCK',
 	'UNSUBSCRIBE'
 ]
-},{"./lib/request":85,"builtin-status-codes":18,"url":90,"xtend":94}],84:[function(require,module,exports){
+},{"./lib/request":85,"builtin-status-codes":19,"url":88,"xtend":93}],84:[function(require,module,exports){
 (function (global){
 exports.fetch = isFunction(global.fetch) && isFunction(global.ReadableByteStream)
 
@@ -18518,10 +18751,7 @@ xhr = null // Help gc
 (function (process,global,Buffer){
 // var Base64 = require('Base64')
 var capability = require('./capability')
-var foreach = require('foreach')
-var indexOf = require('indexof')
 var inherits = require('inherits')
-var keys = require('object-keys')
 var response = require('./response')
 var stream = require('stream')
 
@@ -18553,7 +18783,7 @@ var ClientRequest = module.exports = function (opts) {
 	self._headers = {}
 	if (opts.auth)
 		self.setHeader('Authorization', 'Basic ' + new Buffer(opts.auth).toString('base64'))
-	foreach(keys(opts.headers), function (name) {
+	Object.keys(opts.headers).forEach(function (name) {
 		self.setHeader(name, opts.headers[name])
 	})
 
@@ -18586,7 +18816,7 @@ ClientRequest.prototype.setHeader = function (name, value) {
 	// This check is not necessary, but it prevents warnings from browsers about setting unsafe
 	// headers. To be honest I'm not entirely sure hiding these warnings is a good thing, but
 	// http-browserify did it, so I will too.
-	if (indexOf(unsafeHeaders, lowerName) !== -1)
+	if (unsafeHeaders.indexOf(lowerName) !== -1)
 		return
 
 	self._headers[lowerName] = {
@@ -18614,7 +18844,7 @@ ClientRequest.prototype._onFinish = function () {
 
 	var headersObj = self._headers
 	var body
-	if (opts.method === 'POST' || opts.method === 'PUT') {
+	if (opts.method === 'POST' || opts.method === 'PUT' || opts.method === 'PATCH') {
 		if (capability.blobConstructor) {
 			body = new global.Blob(self._body.map(function (buffer) {
 				return buffer.toArrayBuffer()
@@ -18628,7 +18858,7 @@ ClientRequest.prototype._onFinish = function () {
 	}
 
 	if (self._mode === 'fetch') {
-		var headers = keys(headersObj).map(function (name) {
+		var headers = Object.keys(headersObj).map(function (name) {
 			return [headersObj[name].name, headersObj[name].value]
 		})
 
@@ -18641,7 +18871,7 @@ ClientRequest.prototype._onFinish = function () {
 		}).then(function (response) {
 			self._fetchResponse = response
 			self._connect()
-		}).then(undefined, function (reason) {
+		}, function (reason) {
 			self.emit('error', reason)
 		})
 	} else {
@@ -18665,7 +18895,7 @@ ClientRequest.prototype._onFinish = function () {
 		if (self._mode === 'text' && 'overrideMimeType' in xhr)
 			xhr.overrideMimeType('text/plain; charset=x-user-defined')
 
-		foreach(keys(headersObj), function (name) {
+		Object.keys(headersObj).forEach(function (name) {
 			xhr.setRequestHeader(headersObj[name].name, headersObj[name].value)
 		})
 
@@ -18797,10 +19027,9 @@ var unsafeHeaders = [
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
 
-},{"./capability":84,"./response":86,"_process":67,"buffer":17,"foreach":26,"indexof":29,"inherits":30,"object-keys":87,"stream":82}],86:[function(require,module,exports){
+},{"./capability":84,"./response":86,"_process":67,"buffer":17,"inherits":31,"stream":82}],86:[function(require,module,exports){
 (function (process,global,Buffer){
 var capability = require('./capability')
-var foreach = require('foreach')
 var inherits = require('inherits')
 var stream = require('stream')
 
@@ -18865,7 +19094,7 @@ var IncomingMessage = exports.IncomingMessage = function (xhr, response, mode) {
 		self.statusCode = xhr.status
 		self.statusMessage = xhr.statusText
 		var headers = xhr.getAllResponseHeaders().split(/\r?\n/)
-		foreach(headers, function (header) {
+		headers.forEach(function (header) {
 			var matches = header.match(/^([^:]+):\s*(.*)/)
 			if (matches) {
 				var key = matches[1].toLowerCase()
@@ -18975,156 +19204,7 @@ IncomingMessage.prototype._onXHRProgress = function () {
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
 
-},{"./capability":84,"_process":67,"buffer":17,"foreach":26,"inherits":30,"stream":82}],87:[function(require,module,exports){
-'use strict';
-
-// modified from https://github.com/es-shims/es5-shim
-var has = Object.prototype.hasOwnProperty;
-var toStr = Object.prototype.toString;
-var slice = Array.prototype.slice;
-var isArgs = require('./isArguments');
-var hasDontEnumBug = !({ toString: null }).propertyIsEnumerable('toString');
-var hasProtoEnumBug = function () {}.propertyIsEnumerable('prototype');
-var dontEnums = [
-	'toString',
-	'toLocaleString',
-	'valueOf',
-	'hasOwnProperty',
-	'isPrototypeOf',
-	'propertyIsEnumerable',
-	'constructor'
-];
-var equalsConstructorPrototype = function (o) {
-	var ctor = o.constructor;
-	return ctor && ctor.prototype === o;
-};
-var blacklistedKeys = {
-	$console: true,
-	$frame: true,
-	$frameElement: true,
-	$frames: true,
-	$parent: true,
-	$self: true,
-	$webkitIndexedDB: true,
-	$webkitStorageInfo: true,
-	$window: true
-};
-var hasAutomationEqualityBug = (function () {
-	/* global window */
-	if (typeof window === 'undefined') { return false; }
-	for (var k in window) {
-		try {
-			if (!blacklistedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {
-				try {
-					equalsConstructorPrototype(window[k]);
-				} catch (e) {
-					return true;
-				}
-			}
-		} catch (e) {
-			return true;
-		}
-	}
-	return false;
-}());
-var equalsConstructorPrototypeIfNotBuggy = function (o) {
-	/* global window */
-	if (typeof window === 'undefined' || !hasAutomationEqualityBug) {
-		return equalsConstructorPrototype(o);
-	}
-	try {
-		return equalsConstructorPrototype(o);
-	} catch (e) {
-		return false;
-	}
-};
-
-var keysShim = function keys(object) {
-	var isObject = object !== null && typeof object === 'object';
-	var isFunction = toStr.call(object) === '[object Function]';
-	var isArguments = isArgs(object);
-	var isString = isObject && toStr.call(object) === '[object String]';
-	var theKeys = [];
-
-	if (!isObject && !isFunction && !isArguments) {
-		throw new TypeError('Object.keys called on a non-object');
-	}
-
-	var skipProto = hasProtoEnumBug && isFunction;
-	if (isString && object.length > 0 && !has.call(object, 0)) {
-		for (var i = 0; i < object.length; ++i) {
-			theKeys.push(String(i));
-		}
-	}
-
-	if (isArguments && object.length > 0) {
-		for (var j = 0; j < object.length; ++j) {
-			theKeys.push(String(j));
-		}
-	} else {
-		for (var name in object) {
-			if (!(skipProto && name === 'prototype') && has.call(object, name)) {
-				theKeys.push(String(name));
-			}
-		}
-	}
-
-	if (hasDontEnumBug) {
-		var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);
-
-		for (var k = 0; k < dontEnums.length; ++k) {
-			if (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {
-				theKeys.push(dontEnums[k]);
-			}
-		}
-	}
-	return theKeys;
-};
-
-keysShim.shim = function shimObjectKeys() {
-	if (Object.keys) {
-		var keysWorksWithArguments = (function () {
-			// Safari 5.0 bug
-			return (Object.keys(arguments) || '').length === 2;
-		}(1, 2));
-		if (!keysWorksWithArguments) {
-			var originalKeys = Object.keys;
-			Object.keys = function keys(object) {
-				if (isArgs(object)) {
-					return originalKeys(slice.call(object));
-				} else {
-					return originalKeys(object);
-				}
-			};
-		}
-	} else {
-		Object.keys = keysShim;
-	}
-	return Object.keys || keysShim;
-};
-
-module.exports = keysShim;
-
-},{"./isArguments":88}],88:[function(require,module,exports){
-'use strict';
-
-var toStr = Object.prototype.toString;
-
-module.exports = function isArguments(value) {
-	var str = toStr.call(value);
-	var isArgs = str === '[object Arguments]';
-	if (!isArgs) {
-		isArgs = str !== '[object Array]' &&
-			value !== null &&
-			typeof value === 'object' &&
-			typeof value.length === 'number' &&
-			value.length >= 0 &&
-			toStr.call(value.callee) === '[object Function]';
-	}
-	return isArgs;
-};
-
-},{}],89:[function(require,module,exports){
+},{"./capability":84,"_process":67,"buffer":17,"inherits":31,"stream":82}],87:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -19347,7 +19427,7 @@ function base64DetectIncompleteChar(buffer) {
   this.charLength = this.charReceived ? 3 : 0;
 }
 
-},{"buffer":17}],90:[function(require,module,exports){
+},{"buffer":17}],88:[function(require,module,exports){
 // Copyright Joyent, Inc. and other Node contributors.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a
@@ -19369,7 +19449,10 @@ function base64DetectIncompleteChar(buffer) {
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+'use strict';
+
 var punycode = require('punycode');
+var util = require('./util');
 
 exports.parse = urlParse;
 exports.resolve = urlResolve;
@@ -19400,6 +19483,9 @@ function Url() {
 var protocolPattern = /^([a-z0-9.+-]+:)/i,
     portPattern = /:[0-9]*$/,
 
+    // Special case for a simple path URL
+    simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,
+
     // RFC 2396: characters reserved for delimiting URLs.
     // We actually just auto-escape these.
     delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],
@@ -19416,8 +19502,8 @@ var protocolPattern = /^([a-z0-9.+-]+:)/i,
     nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
     hostEndingChars = ['/', '?', '#'],
     hostnameMaxLen = 255,
-    hostnamePartPattern = /^[a-z0-9A-Z_-]{0,63}$/,
-    hostnamePartStart = /^([a-z0-9A-Z_-]{0,63})(.*)$/,
+    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
+    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
     // protocols that can allow "unsafe" and "unwise" chars.
     unsafeProtocol = {
       'javascript': true,
@@ -19444,7 +19530,7 @@ var protocolPattern = /^([a-z0-9.+-]+:)/i,
     querystring = require('querystring');
 
 function urlParse(url, parseQueryString, slashesDenoteHost) {
-  if (url && isObject(url) && url instanceof Url) return url;
+  if (url && util.isObject(url) && url instanceof Url) return url;
 
   var u = new Url;
   u.parse(url, parseQueryString, slashesDenoteHost);
@@ -19452,16 +19538,49 @@ function urlParse(url, parseQueryString, slashesDenoteHost) {
 }
 
 Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
-  if (!isString(url)) {
+  if (!util.isString(url)) {
     throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
   }
 
+  // Copy chrome, IE, opera backslash-handling behavior.
+  // Back slashes before the query string get converted to forward slashes
+  // See: https://code.google.com/p/chromium/issues/detail?id=25916
+  var queryIndex = url.indexOf('?'),
+      splitter =
+          (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
+      uSplit = url.split(splitter),
+      slashRegex = /\\/g;
+  uSplit[0] = uSplit[0].replace(slashRegex, '/');
+  url = uSplit.join(splitter);
+
   var rest = url;
 
   // trim before proceeding.
   // This is to support parse stuff like "  http://foo.com  \n"
   rest = rest.trim();
 
+  if (!slashesDenoteHost && url.split('#').length === 1) {
+    // Try fast path regexp
+    var simplePath = simplePathPattern.exec(rest);
+    if (simplePath) {
+      this.path = rest;
+      this.href = rest;
+      this.pathname = simplePath[1];
+      if (simplePath[2]) {
+        this.search = simplePath[2];
+        if (parseQueryString) {
+          this.query = querystring.parse(this.search.substr(1));
+        } else {
+          this.query = this.search.substr(1);
+        }
+      } else if (parseQueryString) {
+        this.search = '';
+        this.query = {};
+      }
+      return this;
+    }
+  }
+
   var proto = protocolPattern.exec(rest);
   if (proto) {
     proto = proto[0];
@@ -19599,18 +19718,11 @@ Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
     }
 
     if (!ipv6Hostname) {
-      // IDNA Support: Returns a puny coded representation of "domain".
-      // It only converts the part of the domain name that
-      // has non ASCII characters. I.e. it dosent matter if
-      // you call it with a domain that already is in ASCII.
-      var domainArray = this.hostname.split('.');
-      var newOut = [];
-      for (var i = 0; i < domainArray.length; ++i) {
-        var s = domainArray[i];
-        newOut.push(s.match(/[^A-Za-z0-9_-]/) ?
-            'xn--' + punycode.encode(s) : s);
-      }
-      this.hostname = newOut.join('.');
+      // IDNA Support: Returns a punycoded representation of "domain".
+      // It only converts parts of the domain name that
+      // have non-ASCII characters, i.e. it doesn't matter if
+      // you call it with a domain that already is ASCII-only.
+      this.hostname = punycode.toASCII(this.hostname);
     }
 
     var p = this.port ? ':' + this.port : '';
@@ -19637,6 +19749,8 @@ Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
     // need to be.
     for (var i = 0, l = autoEscape.length; i < l; i++) {
       var ae = autoEscape[i];
+      if (rest.indexOf(ae) === -1)
+        continue;
       var esc = encodeURIComponent(ae);
       if (esc === ae) {
         esc = escape(ae);
@@ -19690,7 +19804,7 @@ function urlFormat(obj) {
   // If it's an obj, this is a no-op.
   // this way, you can call url_format() on strings
   // to clean up potentially wonky urls.
-  if (isString(obj)) obj = urlParse(obj);
+  if (util.isString(obj)) obj = urlParse(obj);
   if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
   return obj.format();
 }
@@ -19721,7 +19835,7 @@ Url.prototype.format = function() {
   }
 
   if (this.query &&
-      isObject(this.query) &&
+      util.isObject(this.query) &&
       Object.keys(this.query).length) {
     query = querystring.stringify(this.query);
   }
@@ -19765,16 +19879,18 @@ function urlResolveObject(source, relative) {
 }
 
 Url.prototype.resolveObject = function(relative) {
-  if (isString(relative)) {
+  if (util.isString(relative)) {
     var rel = new Url();
     rel.parse(relative, false, true);
     relative = rel;
   }
 
   var result = new Url();
-  Object.keys(this).forEach(function(k) {
-    result[k] = this[k];
-  }, this);
+  var tkeys = Object.keys(this);
+  for (var tk = 0; tk < tkeys.length; tk++) {
+    var tkey = tkeys[tk];
+    result[tkey] = this[tkey];
+  }
 
   // hash is always overridden, no matter what.
   // even href="" will remove it.
@@ -19789,10 +19905,12 @@ Url.prototype.resolveObject = function(relative) {
   // hrefs like //foo/bar always cut to the protocol.
   if (relative.slashes && !relative.protocol) {
     // take everything except the protocol from relative
-    Object.keys(relative).forEach(function(k) {
-      if (k !== 'protocol')
-        result[k] = relative[k];
-    });
+    var rkeys = Object.keys(relative);
+    for (var rk = 0; rk < rkeys.length; rk++) {
+      var rkey = rkeys[rk];
+      if (rkey !== 'protocol')
+        result[rkey] = relative[rkey];
+    }
 
     //urlParse appends trailing / to urls like http://www.example.com
     if (slashedProtocol[result.protocol] &&
@@ -19814,9 +19932,11 @@ Url.prototype.resolveObject = function(relative) {
     // because that's known to be hostless.
     // anything else is assumed to be absolute.
     if (!slashedProtocol[relative.protocol]) {
-      Object.keys(relative).forEach(function(k) {
+      var keys = Object.keys(relative);
+      for (var v = 0; v < keys.length; v++) {
+        var k = keys[v];
         result[k] = relative[k];
-      });
+      }
       result.href = result.format();
       return result;
     }
@@ -19905,14 +20025,14 @@ Url.prototype.resolveObject = function(relative) {
     srcPath = srcPath.concat(relPath);
     result.search = relative.search;
     result.query = relative.query;
-  } else if (!isNullOrUndefined(relative.search)) {
+  } else if (!util.isNullOrUndefined(relative.search)) {
     // just pull out the search.
     // like href='?foo'.
     // Put this after the other two cases because it simplifies the booleans
     if (psychotic) {
       result.hostname = result.host = srcPath.shift();
       //occationaly the auth can get stuck only in host
-      //this especialy happens in cases like
+      //this especially happens in cases like
       //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
       var authInHost = result.host && result.host.indexOf('@') > 0 ?
                        result.host.split('@') : false;
@@ -19924,7 +20044,7 @@ Url.prototype.resolveObject = function(relative) {
     result.search = relative.search;
     result.query = relative.query;
     //to support http.request
-    if (!isNull(result.pathname) || !isNull(result.search)) {
+    if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
       result.path = (result.pathname ? result.pathname : '') +
                     (result.search ? result.search : '');
     }
@@ -19951,15 +20071,15 @@ Url.prototype.resolveObject = function(relative) {
   // then it must NOT get a trailing slash.
   var last = srcPath.slice(-1)[0];
   var hasTrailingSlash = (
-      (result.host || relative.host) && (last === '.' || last === '..') ||
-      last === '');
+      (result.host || relative.host || srcPath.length > 1) &&
+      (last === '.' || last === '..') || last === '');
 
   // strip single dots, resolve double dots to parent dir
   // if the path tries to go above the root, `up` ends up > 0
   var up = 0;
   for (var i = srcPath.length; i >= 0; i--) {
     last = srcPath[i];
-    if (last == '.') {
+    if (last === '.') {
       srcPath.splice(i, 1);
     } else if (last === '..') {
       srcPath.splice(i, 1);
@@ -19994,7 +20114,7 @@ Url.prototype.resolveObject = function(relative) {
     result.hostname = result.host = isAbsolute ? '' :
                                     srcPath.length ? srcPath.shift() : '';
     //occationaly the auth can get stuck only in host
-    //this especialy happens in cases like
+    //this especially happens in cases like
     //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
     var authInHost = result.host && result.host.indexOf('@') > 0 ?
                      result.host.split('@') : false;
@@ -20018,7 +20138,7 @@ Url.prototype.resolveObject = function(relative) {
   }
 
   //to support request.http
-  if (!isNull(result.pathname) || !isNull(result.search)) {
+  if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
     result.path = (result.pathname ? result.pathname : '') +
                   (result.search ? result.search : '');
   }
@@ -20041,22 +20161,25 @@ Url.prototype.parseHost = function() {
   if (host) this.hostname = host;
 };
 
-function isString(arg) {
-  return typeof arg === "string";
-}
-
-function isObject(arg) {
-  return typeof arg === 'object' && arg !== null;
-}
+},{"./util":89,"punycode":68,"querystring":71}],89:[function(require,module,exports){
+'use strict';
 
-function isNull(arg) {
-  return arg === null;
-}
-function isNullOrUndefined(arg) {
-  return  arg == null;
-}
+module.exports = {
+  isString: function(arg) {
+    return typeof(arg) === 'string';
+  },
+  isObject: function(arg) {
+    return typeof(arg) === 'object' && arg !== null;
+  },
+  isNull: function(arg) {
+    return arg === null;
+  },
+  isNullOrUndefined: function(arg) {
+    return arg == null;
+  }
+};
 
-},{"punycode":68,"querystring":71}],91:[function(require,module,exports){
+},{}],90:[function(require,module,exports){
 (function (global){
 
 /**
@@ -20128,14 +20251,14 @@ function config (name) {
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{}],92:[function(require,module,exports){
+},{}],91:[function(require,module,exports){
 module.exports = function isBuffer(arg) {
   return arg && typeof arg === 'object'
     && typeof arg.copy === 'function'
     && typeof arg.fill === 'function'
     && typeof arg.readUInt8 === 'function';
 }
-},{}],93:[function(require,module,exports){
+},{}],92:[function(require,module,exports){
 (function (process,global){
 // Copyright Joyent, Inc. and other Node contributors.
 //
@@ -20726,9 +20849,11 @@ function hasOwnProperty(obj, prop) {
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{"./support/isBuffer":92,"_process":67,"inherits":30}],94:[function(require,module,exports){
+},{"./support/isBuffer":91,"_process":67,"inherits":31}],93:[function(require,module,exports){
 module.exports = extend
 
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
 function extend() {
     var target = {}
 
@@ -20736,7 +20861,7 @@ function extend() {
         var source = arguments[i]
 
         for (var key in source) {
-            if (source.hasOwnProperty(key)) {
+            if (hasOwnProperty.call(source, key)) {
                 target[key] = source[key]
             }
         }
diff --git a/dist/ref-parser.js.map b/dist/ref-parser.js.map
index 33eae3be..f95d668c 100644
--- a/dist/ref-parser.js.map
+++ b/dist/ref-parser.js.map
@@ -18,6 +18,7 @@
     "../node_modules/base64-js/lib/b64.js",
     "../node_modules/browser-resolve/empty.js",
     "../node_modules/buffer/index.js",
+    "../node_modules/buffer/node_modules/isarray/index.js",
     "../node_modules/builtin-status-codes/browser.js",
     "../node_modules/call-me-maybe/index.js",
     "../node_modules/core-util-is/lib/util.js",
@@ -26,12 +27,11 @@
     "../node_modules/es6-promise/dist/es6-promise.js",
     "../node_modules/esprima/esprima.js",
     "../node_modules/events/events.js",
-    "../node_modules/foreach/index.js",
     "../node_modules/https-browserify/index.js",
     "../node_modules/ieee754/index.js",
-    "../node_modules/indexof/index.js",
+    "../node_modules/inherit/index.js",
+    "../node_modules/inherit/lib/inherit.js",
     "../node_modules/inherits/inherits_browser.js",
-    "../node_modules/is-array/index.js",
     "../node_modules/is-buffer/index.js",
     "../node_modules/isarray/index.js",
     "../node_modules/js-yaml/index.js",
@@ -87,25 +87,24 @@
     "../node_modules/stream-http/lib/capability.js",
     "../node_modules/stream-http/lib/request.js",
     "../node_modules/stream-http/lib/response.js",
-    "../node_modules/stream-http/node_modules/object-keys/index.js",
-    "../node_modules/stream-http/node_modules/object-keys/isArguments.js",
     "../node_modules/string_decoder/index.js",
     "../node_modules/url/url.js",
+    "../node_modules/url/util.js",
     "../node_modules/util-deprecate/browser.js",
     "../node_modules/util/support/isBufferBrowser.js",
     "../node_modules/util/util.js",
     "../node_modules/xtend/immutable.js"
   ],
   "names": [],
-  "mappings": 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   "file": "generated.js",
   "sourceRoot": "",
   "sourcesContent": [
     "(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})",
-    "/** !\n * JSON Schema $Ref Parser v1.4.0\n *\n * @link https://github.com/BigstickCarpet/json-schema-ref-parser\n * @license MIT\n */\n'use strict';\n\nvar $Ref    = require('./ref'),\n    Pointer = require('./pointer'),\n    util    = require('./util'),\n    url     = require('url');\n\nmodule.exports = bundle;\n\n/**\n * Bundles all external JSON references into the main JSON schema, thus resulting in a schema that\n * only has *internal* references, not any *external* references.\n * This method mutates the JSON schema object, adding new references and re-mapping existing ones.\n *\n * @param {$RefParser} parser\n * @param {$RefParserOptions} options\n */\nfunction bundle(parser, options) {\n  util.debug('Bundling $ref pointers in %s', parser._basePath);\n\n  remap(parser.$refs, options);\n  dereference(parser._basePath, parser.$refs, options);\n}\n\n/**\n * Re-maps all $ref pointers in the schema, so that they are relative to the root of the schema.\n *\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n */\nfunction remap($refs, options) {\n  var remapped = [];\n\n  // Crawl the schema and determine the re-mapped values for all $ref pointers.\n  // NOTE: We don't actually APPLY the re-mappings them yet, since that can affect other re-mappings\n  Object.keys($refs._$refs).forEach(function(key) {\n    var $ref = $refs._$refs[key];\n    crawl($ref.value, $ref.path + '#', $refs, remapped, options);\n  });\n\n  // Now APPLY all of the re-mappings\n  for (var i = 0; i < remapped.length; i++) {\n    var mapping = remapped[i];\n    mapping.old.$ref = mapping.new.$ref;\n  }\n}\n\n/**\n * Recursively crawls the given value, and re-maps any JSON references.\n *\n * @param {*} obj - The value to crawl. If it's not an object or array, it will be ignored.\n * @param {string} path - The path to use for resolving relative JSON references\n * @param {$Refs} $refs - The resolved JSON references\n * @param {object[]} remapped - An array of the re-mapped JSON references\n * @param {$RefParserOptions} options\n */\nfunction crawl(obj, path, $refs, remapped, options) {\n  if (obj && typeof obj === 'object') {\n    Object.keys(obj).forEach(function(key) {\n      var keyPath = Pointer.join(path, key);\n      var value = obj[key];\n\n      if ($Ref.is$Ref(value)) {\n        // We found a $ref, so resolve it\n        util.debug('Re-mapping $ref pointer \"%s\" at %s', value.$ref, keyPath);\n        var $refPath = url.resolve(path, value.$ref);\n        var pointer = $refs._resolve($refPath, options);\n\n        // Re-map the value\n        var new$RefPath = pointer.$ref.pathFromRoot + util.path.getHash(pointer.path).substr(1);\n        util.debug('    new value: %s', new$RefPath);\n        remapped.push({\n          old: value,\n          new: {$ref: new$RefPath}\n        });\n      }\n      else {\n        crawl(value, keyPath, $refs, remapped, options);\n      }\n    });\n  }\n}\n\n/**\n * Dereferences each external $ref pointer exactly ONCE.\n *\n * @param {string} basePath\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n */\nfunction dereference(basePath, $refs, options) {\n  basePath = util.path.stripHash(basePath);\n\n  Object.keys($refs._$refs).forEach(function(key) {\n    var $ref = $refs._$refs[key];\n    if ($ref.pathFromRoot !== '#') {\n      $refs.set(basePath + $ref.pathFromRoot, $ref.value, options);\n    }\n  });\n}\n",
+    "/** !\n * JSON Schema $Ref Parser v1.4.1\n *\n * @link https://github.com/BigstickCarpet/json-schema-ref-parser\n * @license MIT\n */\n'use strict';\n\nvar $Ref    = require('./ref'),\n    Pointer = require('./pointer'),\n    util    = require('./util'),\n    url     = require('url');\n\nmodule.exports = bundle;\n\n/**\n * Bundles all external JSON references into the main JSON schema, thus resulting in a schema that\n * only has *internal* references, not any *external* references.\n * This method mutates the JSON schema object, adding new references and re-mapping existing ones.\n *\n * @param {$RefParser} parser\n * @param {$RefParserOptions} options\n */\nfunction bundle(parser, options) {\n  util.debug('Bundling $ref pointers in %s', parser._basePath);\n\n  remap(parser.$refs, options);\n  dereference(parser._basePath, parser.$refs, options);\n}\n\n/**\n * Re-maps all $ref pointers in the schema, so that they are relative to the root of the schema.\n *\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n */\nfunction remap($refs, options) {\n  var remapped = [];\n\n  // Crawl the schema and determine the re-mapped values for all $ref pointers.\n  // NOTE: We don't actually APPLY the re-mappings them yet, since that can affect other re-mappings\n  Object.keys($refs._$refs).forEach(function(key) {\n    var $ref = $refs._$refs[key];\n    crawl($ref.value, $ref.path + '#', $refs, remapped, options);\n  });\n\n  // Now APPLY all of the re-mappings\n  for (var i = 0; i < remapped.length; i++) {\n    var mapping = remapped[i];\n    mapping.old$Ref.$ref = mapping.new$Ref.$ref;\n  }\n}\n\n/**\n * Recursively crawls the given value, and re-maps any JSON references.\n *\n * @param {*} obj - The value to crawl. If it's not an object or array, it will be ignored.\n * @param {string} path - The path to use for resolving relative JSON references\n * @param {$Refs} $refs - The resolved JSON references\n * @param {object[]} remapped - An array of the re-mapped JSON references\n * @param {$RefParserOptions} options\n */\nfunction crawl(obj, path, $refs, remapped, options) {\n  if (obj && typeof obj === 'object') {\n    Object.keys(obj).forEach(function(key) {\n      var keyPath = Pointer.join(path, key);\n      var value = obj[key];\n\n      if ($Ref.is$Ref(value)) {\n        // We found a $ref, so resolve it\n        util.debug('Re-mapping $ref pointer \"%s\" at %s', value.$ref, keyPath);\n        var $refPath = url.resolve(path, value.$ref);\n        var pointer = $refs._resolve($refPath, options);\n\n        // Re-map the value\n        var new$RefPath = pointer.$ref.pathFromRoot + util.path.getHash(pointer.path).substr(1);\n        util.debug('    new value: %s', new$RefPath);\n        remapped.push({\n          old$Ref: value,\n          new$Ref: {$ref: new$RefPath}  // Note: DON'T name this property `new` (https://github.com/BigstickCarpet/json-schema-ref-parser/issues/3)\n        });\n      }\n      else {\n        crawl(value, keyPath, $refs, remapped, options);\n      }\n    });\n  }\n}\n\n/**\n * Dereferences each external $ref pointer exactly ONCE.\n *\n * @param {string} basePath\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n */\nfunction dereference(basePath, $refs, options) {\n  basePath = util.path.stripHash(basePath);\n\n  Object.keys($refs._$refs).forEach(function(key) {\n    var $ref = $refs._$refs[key];\n    if ($ref.pathFromRoot !== '#') {\n      $refs.set(basePath + $ref.pathFromRoot, $ref.value, options);\n    }\n  });\n}\n",
     "'use strict';\n\nvar $Ref    = require('./ref'),\n    Pointer = require('./pointer'),\n    util    = require('./util'),\n    ono     = require('ono'),\n    url     = require('url');\n\nmodule.exports = dereference;\n\n/**\n * Crawls the JSON schema, finds all JSON references, and dereferences them.\n * This method mutates the JSON schema object, replacing JSON references with their resolved value.\n *\n * @param {$RefParser} parser\n * @param {$RefParserOptions} options\n */\nfunction dereference(parser, options) {\n  util.debug('Dereferencing $ref pointers in %s', parser._basePath);\n  parser.$refs.circular = false;\n  crawl(parser.schema, parser._basePath, [], parser.$refs, options);\n}\n\n/**\n * Recursively crawls the given value, and dereferences any JSON references.\n *\n * @param {*} obj - The value to crawl. If it's not an object or array, it will be ignored.\n * @param {string} path - The path to use for resolving relative JSON references\n * @param {object[]} parents - An array of the parent objects that have already been dereferenced\n * @param {$Refs} $refs - The resolved JSON references\n * @param {$RefParserOptions} options\n * @returns {boolean} - Returns true if a circular reference was found\n */\nfunction crawl(obj, path, parents, $refs, options) {\n  var isCircular = false;\n\n  if (obj && typeof obj === 'object') {\n    parents.push(obj);\n\n    Object.keys(obj).forEach(function(key) {\n      var keyPath = Pointer.join(path, key);\n      var value = obj[key];\n      var circular = false;\n\n      if ($Ref.isAllowed$Ref(value, options)) {\n        // We found a $ref, so resolve it\n        util.debug('Dereferencing $ref pointer \"%s\" at %s', value.$ref, keyPath);\n        var $refPath = url.resolve(path, value.$ref);\n        var pointer = $refs._resolve($refPath, options);\n\n        // Check for circular references\n        circular = pointer.circular || parents.indexOf(pointer.value) !== -1;\n        circular && foundCircularReference(keyPath, $refs, options);\n\n        // Dereference the JSON reference\n        var dereferencedValue = getDereferencedValue(value, pointer.value);\n\n        // Crawl the dereferenced value (unless it's circular)\n        if (!circular) {\n          // If the `crawl` method returns true, then dereferenced value is circular\n          circular = crawl(dereferencedValue, pointer.path, parents, $refs, options);\n        }\n\n        // Replace the JSON reference with the dereferenced value\n        if (!circular || options.$refs.circular === true) {\n          obj[key] = dereferencedValue;\n        }\n      }\n      else {\n        if (parents.indexOf(value) === -1) {\n          circular = crawl(value, keyPath, parents, $refs, options);\n        }\n        else {\n          circular = foundCircularReference(keyPath, $refs, options);\n        }\n      }\n\n      // Set the \"isCircular\" flag if this or any other property is circular\n      isCircular = isCircular || circular;\n    });\n\n    parents.pop();\n  }\n  return isCircular;\n}\n\n/**\n * Returns the dereferenced value of the given JSON reference.\n *\n * @param {object} currentValue - the current value, which contains a JSON reference (\"$ref\" property)\n * @param {*} resolvedValue - the resolved value, which can be any type\n * @returns {*} - Returns the dereferenced value\n */\nfunction getDereferencedValue(currentValue, resolvedValue) {\n  if (resolvedValue && typeof resolvedValue === 'object' && Object.keys(currentValue).length > 1) {\n    // The current value has additional properties (other than \"$ref\"),\n    // so merge the resolved value rather than completely replacing the reference\n    var merged = {};\n    Object.keys(currentValue).forEach(function(key) {\n      if (key !== '$ref') {\n        merged[key] = currentValue[key];\n      }\n    });\n    Object.keys(resolvedValue).forEach(function(key) {\n      if (!(key in merged)) {\n        merged[key] = resolvedValue[key];\n      }\n    });\n    return merged;\n  }\n  else {\n    // Completely replace the original reference with the resolved value\n    return resolvedValue;\n  }\n}\n\n/**\n * Called when a circular reference is found.\n * It sets the {@link $Refs#circular} flag, and throws an error if options.$refs.circular is false.\n *\n * @param {string} keyPath - The JSON Reference path of the circular reference\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n * @returns {boolean} - always returns true, to indicate that a circular reference was found\n */\nfunction foundCircularReference(keyPath, $refs, options) {\n  $refs.circular = true;\n  if (!options.$refs.circular) {\n    throw ono.reference('Circular $ref pointer found at %s', keyPath);\n  }\n  return true;\n}\n",
     "'use strict';\n\nvar Promise     = require('./promise'),\n    Options     = require('./options'),\n    $Refs       = require('./refs'),\n    $Ref        = require('./ref'),\n    read        = require('./read'),\n    resolve     = require('./resolve'),\n    bundle      = require('./bundle'),\n    dereference = require('./dereference'),\n    util        = require('./util'),\n    url         = require('url'),\n    maybe       = require('call-me-maybe'),\n    ono         = require('ono');\n\nmodule.exports = $RefParser;\nmodule.exports.YAML = require('./yaml');\n\n/**\n * This class parses a JSON schema, builds a map of its JSON references and their resolved values,\n * and provides methods for traversing, manipulating, and dereferencing those references.\n *\n * @constructor\n */\nfunction $RefParser() {\n  /**\n   * The parsed (and possibly dereferenced) JSON schema object\n   *\n   * @type {object}\n   * @readonly\n   */\n  this.schema = null;\n\n  /**\n   * The resolved JSON references\n   *\n   * @type {$Refs}\n   */\n  this.$refs = new $Refs();\n\n  /**\n   * The file path or URL of the main JSON schema file.\n   * This will be empty if the schema was passed as an object rather than a path.\n   *\n   * @type {string}\n   * @protected\n   */\n  this._basePath = '';\n}\n\n/**\n * Parses the given JSON schema.\n * This method does not resolve any JSON references.\n * It just reads a single file in JSON or YAML format, and parse it as a JavaScript object.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed\n * @param {function} [callback] - An error-first callback. The second parameter is the parsed JSON schema object.\n * @returns {Promise} - The returned promise resolves with the parsed JSON schema object.\n */\n$RefParser.parse = function(schema, options, callback) {\n  var Class = this; // eslint-disable-line consistent-this\n  return new Class().parse(schema, options, callback);\n};\n\n/**\n * Parses the given JSON schema.\n * This method does not resolve any JSON references.\n * It just reads a single file in JSON or YAML format, and parse it as a JavaScript object.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed\n * @param {function} [callback] - An error-first callback. The second parameter is the parsed JSON schema object.\n * @returns {Promise} - The returned promise resolves with the parsed JSON schema object.\n */\n$RefParser.prototype.parse = function(schema, options, callback) {\n  var args = normalizeArgs(arguments);\n\n  if (args.schema && typeof args.schema === 'object') {\n    // The schema is an object, not a path/url\n    this.schema = args.schema;\n    this._basePath = '';\n    var $ref = new $Ref(this.$refs, this._basePath);\n    $ref.setValue(this.schema, args.options);\n\n    return maybe(args.callback, Promise.resolve(this.schema));\n  }\n\n  if (!args.schema || typeof args.schema !== 'string') {\n    var err = ono('Expected a file path, URL, or object. Got %s', args.schema);\n    return maybe(args.callback, Promise.reject(err));\n  }\n\n  var me = this;\n\n  // Resolve the absolute path of the schema\n  args.schema = util.path.localPathToUrl(args.schema);\n  args.schema = url.resolve(util.path.cwd(), args.schema);\n  this._basePath = util.path.stripHash(args.schema);\n\n  // Read the schema file/url\n  return read(args.schema, this.$refs, args.options)\n    .then(function(cached$Ref) {\n      var value = cached$Ref.$ref.value;\n      if (!value || typeof value !== 'object' || value instanceof Buffer) {\n        throw ono.syntax('\"%s\" is not a valid JSON Schema', me._basePath);\n      }\n      else {\n        me.schema = value;\n        return maybe(args.callback, Promise.resolve(me.schema));\n      }\n    })\n    .catch(function(e) {\n      return maybe(args.callback, Promise.reject(e));\n    });\n};\n\n/**\n * Parses the given JSON schema and resolves any JSON references, including references in\n * externally-referenced files.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed and resolved\n * @param {function} [callback]\n * - An error-first callback. The second parameter is a {@link $Refs} object containing the resolved JSON references\n *\n * @returns {Promise}\n * The returned promise resolves with a {@link $Refs} object containing the resolved JSON references\n */\n$RefParser.resolve = function(schema, options, callback) {\n  var Class = this; // eslint-disable-line consistent-this\n  return new Class().resolve(schema, options, callback);\n};\n\n/**\n * Parses the given JSON schema and resolves any JSON references, including references in\n * externally-referenced files.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed and resolved\n * @param {function} [callback]\n * - An error-first callback. The second parameter is a {@link $Refs} object containing the resolved JSON references\n *\n * @returns {Promise}\n * The returned promise resolves with a {@link $Refs} object containing the resolved JSON references\n */\n$RefParser.prototype.resolve = function(schema, options, callback) {\n  var me = this;\n  var args = normalizeArgs(arguments);\n\n  return this.parse(args.schema, args.options)\n    .then(function() {\n      return resolve(me, args.options);\n    })\n    .then(function() {\n      return maybe(args.callback, Promise.resolve(me.$refs));\n    })\n    .catch(function(err) {\n      return maybe(args.callback, Promise.reject(err));\n    });\n};\n\n/**\n * Parses the given JSON schema, resolves any JSON references, and bundles all external references\n * into the main JSON schema. This produces a JSON schema that only has *internal* references,\n * not any *external* references.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed, resolved, and dereferenced\n * @param {function} [callback] - An error-first callback. The second parameter is the bundled JSON schema object\n * @returns {Promise} - The returned promise resolves with the bundled JSON schema object.\n */\n$RefParser.bundle = function(schema, options, callback) {\n  var Class = this; // eslint-disable-line consistent-this\n  return new Class().bundle(schema, options, callback);\n};\n\n/**\n * Parses the given JSON schema, resolves any JSON references, and bundles all external references\n * into the main JSON schema. This produces a JSON schema that only has *internal* references,\n * not any *external* references.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed, resolved, and dereferenced\n * @param {function} [callback] - An error-first callback. The second parameter is the bundled JSON schema object\n * @returns {Promise} - The returned promise resolves with the bundled JSON schema object.\n */\n$RefParser.prototype.bundle = function(schema, options, callback) {\n  var me = this;\n  var args = normalizeArgs(arguments);\n\n  return this.resolve(args.schema, args.options)\n    .then(function() {\n      bundle(me, args.options);\n      return maybe(args.callback, Promise.resolve(me.schema));\n    })\n    .catch(function(err) {\n      return maybe(args.callback, Promise.reject(err));\n    });\n};\n\n/**\n * Parses the given JSON schema, resolves any JSON references, and dereferences the JSON schema.\n * That is, all JSON references are replaced with their resolved values.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed, resolved, and dereferenced\n * @param {function} [callback] - An error-first callback. The second parameter is the dereferenced JSON schema object\n * @returns {Promise} - The returned promise resolves with the dereferenced JSON schema object.\n */\n$RefParser.dereference = function(schema, options, callback) {\n  var Class = this; // eslint-disable-line consistent-this\n  return new Class().dereference(schema, options, callback);\n};\n\n/**\n * Parses the given JSON schema, resolves any JSON references, and dereferences the JSON schema.\n * That is, all JSON references are replaced with their resolved values.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed, resolved, and dereferenced\n * @param {function} [callback] - An error-first callback. The second parameter is the dereferenced JSON schema object\n * @returns {Promise} - The returned promise resolves with the dereferenced JSON schema object.\n */\n$RefParser.prototype.dereference = function(schema, options, callback) {\n  var me = this;\n  var args = normalizeArgs(arguments);\n\n  return this.resolve(args.schema, args.options)\n    .then(function() {\n      dereference(me, args.options);\n      return maybe(args.callback, Promise.resolve(me.schema));\n    })\n    .catch(function(err) {\n      return maybe(args.callback, Promise.reject(err));\n    });\n};\n\n/**\n * Normalizes the given arguments, accounting for optional args.\n *\n * @param {Arguments} args\n * @returns {object}\n */\nfunction normalizeArgs(args) {\n  var options = args[1], callback = args[2];\n  if (typeof options === 'function') {\n    callback = options;\n    options = undefined;\n  }\n  if (!(options instanceof Options)) {\n    options = new Options(options);\n  }\n  return {\n    schema: args[0],\n    options: options,\n    callback: callback\n  };\n}\n",
-    "/* eslint lines-around-comment: [2, {beforeBlockComment: false}] */\n'use strict';\n\nmodule.exports = $RefParserOptions;\n\n/**\n * Options that determine how JSON schemas are parsed, dereferenced, and cached.\n *\n * @param {object|$RefParserOptions} [options] - Overridden options\n * @constructor\n */\nfunction $RefParserOptions(options) {\n  /**\n   * Determines what types of files can be parsed\n   */\n  this.allow = {\n    /**\n     * Are JSON files allowed?\n     * If false, then all schemas must be in YAML format.\n     * @type {boolean}\n     */\n    json: true,\n\n    /**\n     * Are YAML files allowed?\n     * If false, then all schemas must be in JSON format.\n     * @type {boolean}\n     */\n    yaml: true,\n\n    /**\n     * Are zero-byte files allowed?\n     * If false, then an error will be thrown if a file is empty.\n     * @type {boolean}\n     */\n    empty: true,\n\n    /**\n     * Can unknown file types be $referenced?\n     * If true, then they will be parsed as Buffers (byte arrays).\n     * If false, then an error will be thrown.\n     * @type {boolean}\n     */\n    unknown: true\n  };\n\n  /**\n   * Determines the types of JSON references that are allowed.\n   */\n  this.$refs = {\n    /**\n     * Allow JSON references to other parts of the same file?\n     * @type {boolean}\n     */\n    internal: true,\n\n    /**\n     * Allow JSON references to external files/URLs?\n     * @type {boolean}\n     */\n    external: true,\n\n    /**\n     * Allow circular (recursive) JSON references?\n     * If false, then a {@link ReferenceError} will be thrown if a circular reference is found.\n     * If \"ignore\", then circular references will not be dereferenced.\n     * @type {boolean|string}\n     */\n    circular: true\n  };\n\n  /**\n   * How long to cache files (in seconds).\n   */\n  this.cache = {\n    /**\n     * How long to cache local files, in seconds.\n     * @type {number}\n     */\n    fs: 60, // 1 minute\n\n    /**\n     * How long to cache files downloaded via HTTP, in seconds.\n     * @type {number}\n     */\n    http: 5 * 60, // 5 minutes\n\n    /**\n     * How long to cache files downloaded via HTTPS, in seconds.\n     * @type {number}\n     */\n    https: 5 * 60 // 5 minutes\n  };\n\n  /* http options */\n  this.http = {\n    /* withCredentials option of XMLHttpRequest */\n    withCredentials: true\n  }\n\n  merge(options, this);\n}\n\n/**\n * Fast, two-level object merge.\n *\n * @param {?object} src - The object to merge into dest\n * @param {object} dest - The object to be modified\n */\nfunction merge(src, dest) {\n  if (src) {\n    var topKeys = Object.keys(src);\n    for (var i = 0; i < topKeys.length; i++) {\n      var topKey = topKeys[i];\n      var srcChild = src[topKey];\n      if (dest[topKey] === undefined) {\n        dest[topKey] = srcChild;\n      }\n      else {\n        var childKeys = Object.keys(srcChild);\n        for (var j = 0; j < childKeys.length; j++) {\n          var childKey = childKeys[j];\n          var srcChildValue = srcChild[childKey];\n          if (srcChildValue !== undefined) {\n            dest[topKey][childKey] = srcChildValue;\n          }\n        }\n      }\n    }\n  }\n}\n",
+    "/* eslint lines-around-comment: [2, {beforeBlockComment: false}] */\n'use strict';\n\nmodule.exports = $RefParserOptions;\n\n/**\n * Options that determine how JSON schemas are parsed, dereferenced, and cached.\n *\n * @param {object|$RefParserOptions} [options] - Overridden options\n * @constructor\n */\nfunction $RefParserOptions(options) {\n  /**\n   * Determines what types of files can be parsed\n   */\n  this.allow = {\n    /**\n     * Are JSON files allowed?\n     * If false, then all schemas must be in YAML format.\n     * @type {boolean}\n     */\n    json: true,\n\n    /**\n     * Are YAML files allowed?\n     * If false, then all schemas must be in JSON format.\n     * @type {boolean}\n     */\n    yaml: true,\n\n    /**\n     * Are zero-byte files allowed?\n     * If false, then an error will be thrown if a file is empty.\n     * @type {boolean}\n     */\n    empty: true,\n\n    /**\n     * Can unknown file types be $referenced?\n     * If true, then they will be parsed as Buffers (byte arrays).\n     * If false, then an error will be thrown.\n     * @type {boolean}\n     */\n    unknown: true\n  };\n\n  /**\n   * Determines the types of JSON references that are allowed.\n   */\n  this.$refs = {\n    /**\n     * Allow JSON references to other parts of the same file?\n     * @type {boolean}\n     */\n    internal: true,\n\n    /**\n     * Allow JSON references to external files/URLs?\n     * @type {boolean}\n     */\n    external: true,\n\n    /**\n     * Allow circular (recursive) JSON references?\n     * If false, then a {@link ReferenceError} will be thrown if a circular reference is found.\n     * If \"ignore\", then circular references will not be dereferenced.\n     * @type {boolean|string}\n     */\n    circular: true\n  };\n\n  /**\n   * How long to cache files (in seconds).\n   */\n  this.cache = {\n    /**\n     * How long to cache local files, in seconds.\n     * @type {number}\n     */\n    fs: 60, // 1 minute\n\n    /**\n     * How long to cache files downloaded via HTTP, in seconds.\n     * @type {number}\n     */\n    http: 5 * 60, // 5 minutes\n\n    /**\n     * How long to cache files downloaded via HTTPS, in seconds.\n     * @type {number}\n     */\n    https: 5 * 60 // 5 minutes\n  };\n\n  /**\n   * HTTP request options\n   */\n  this.http = {\n    /**\n     * The `withCredentials` option of XMLHttpRequest.\n     * Set this to `true` if you're downloading files from a CORS-enabled server that requires authentication\n     */\n    withCredentials: false\n  };\n\n  merge(options, this);\n}\n\n/**\n * Fast, two-level object merge.\n *\n * @param {?object} src - The object to merge into dest\n * @param {object} dest - The object to be modified\n */\nfunction merge(src, dest) {\n  if (src) {\n    var topKeys = Object.keys(src);\n    for (var i = 0; i < topKeys.length; i++) {\n      var topKey = topKeys[i];\n      var srcChild = src[topKey];\n      if (dest[topKey] === undefined) {\n        dest[topKey] = srcChild;\n      }\n      else {\n        var childKeys = Object.keys(srcChild);\n        for (var j = 0; j < childKeys.length; j++) {\n          var childKey = childKeys[j];\n          var srcChildValue = srcChild[childKey];\n          if (srcChildValue !== undefined) {\n            dest[topKey][childKey] = srcChildValue;\n          }\n        }\n      }\n    }\n  }\n}\n",
     "'use strict';\n\nvar YAML = require('./yaml'),\n    util = require('./util'),\n    ono  = require('ono');\n\nmodule.exports = parse;\n\n/**\n * Parses the given data as YAML, JSON, or a raw Buffer (byte array), depending on the options.\n *\n * @param {string|Buffer} data - The data to be parsed\n * @param {string} path - The file path or URL that `data` came from\n * @param {$RefParserOptions} options\n *\n * @returns {string|Buffer|object}\n * If `data` can be parsed as YAML or JSON, then the returned value is a JavaScript object.\n * Otherwise, the returned value is the raw string or Buffer that was passed in.\n */\nfunction parse(data, path, options) {\n  var parsed;\n\n  try {\n    if (options.allow.yaml) {\n      util.debug('Parsing YAML file: %s', path);\n      parsed = YAML.parse(data.toString());\n      util.debug('    Parsed successfully');\n    }\n    else if (options.allow.json) {\n      util.debug('Parsing JSON file: %s', path);\n      parsed = JSON.parse(data.toString());\n      util.debug('    Parsed successfully');\n    }\n    else {\n      parsed = data;\n    }\n  }\n  catch (e) {\n    var ext = util.path.extname(path);\n    if (options.allow.unknown && ['.json', '.yaml', '.yml'].indexOf(ext) === -1) {\n      // It's not a YAML or JSON file, and unknown formats are allowed,\n      // so ignore the parsing error and just return the raw data\n      util.debug('    Unknown file format. Not parsed.');\n      parsed = data;\n    }\n    else {\n      throw ono.syntax(e, 'Error parsing \"%s\"', path);\n    }\n  }\n\n  if (isEmpty(parsed) && !options.allow.empty) {\n    throw ono.syntax('Error parsing \"%s\". \\nParsed value is empty', path);\n  }\n\n  return parsed;\n}\n\n/**\n * Determines whether the parsed value is \"empty\".\n *\n * @param {*} value\n * @returns {boolean}\n */\nfunction isEmpty(value) {\n  return !value ||\n    (typeof value === 'object' && Object.keys(value).length === 0) ||\n    (typeof value === 'string' && value.trim().length === 0) ||\n    (value instanceof Buffer && value.length === 0);\n}\n",
     "'use strict';\n\nmodule.exports = Pointer;\n\nvar $Ref         = require('./ref'),\n    util         = require('./util'),\n    url          = require('url'),\n    ono          = require('ono'),\n    slashes      = /\\//g,\n    tildes       = /~/g,\n    escapedSlash = /~1/g,\n    escapedTilde = /~0/g;\n\n/**\n * This class represents a single JSON pointer and its resolved value.\n *\n * @param {$Ref} $ref\n * @param {string} path\n * @constructor\n */\nfunction Pointer($ref, path) {\n  /**\n   * The {@link $Ref} object that contains this {@link Pointer} object.\n   * @type {$Ref}\n   */\n  this.$ref = $ref;\n\n  /**\n   * The file path or URL, containing the JSON pointer in the hash.\n   * This path is relative to the path of the main JSON schema file.\n   * @type {string}\n   */\n  this.path = path;\n\n  /**\n   * The value of the JSON pointer.\n   * Can be any JSON type, not just objects. Unknown file types are represented as Buffers (byte arrays).\n   * @type {?*}\n   */\n  this.value = undefined;\n\n  /**\n   * Indicates whether the pointer is references itself.\n   * @type {boolean}\n   */\n  this.circular = false;\n}\n\n/**\n * Resolves the value of a nested property within the given object.\n *\n * @param {*} obj - The object that will be crawled\n * @param {$RefParserOptions} [options]\n *\n * @returns {Pointer}\n * Returns a JSON pointer whose {@link Pointer#value} is the resolved value.\n * If resolving this value required resolving other JSON references, then\n * the {@link Pointer#$ref} and {@link Pointer#path} will reflect the resolution path\n * of the resolved value.\n */\nPointer.prototype.resolve = function(obj, options) {\n  var tokens = Pointer.parse(this.path);\n\n  // Crawl the object, one token at a time\n  this.value = obj;\n  for (var i = 0; i < tokens.length; i++) {\n    if (resolveIf$Ref(this, options)) {\n      // The $ref path has changed, so append the remaining tokens to the path\n      this.path = Pointer.join(this.path, tokens.slice(i));\n    }\n\n    var token = tokens[i];\n    if (this.value[token] === undefined) {\n      throw ono.syntax('Error resolving $ref pointer \"%s\". \\nToken \"%s\" does not exist.', this.path, token);\n    }\n    else {\n      this.value = this.value[token];\n    }\n  }\n\n  // Resolve the final value\n  resolveIf$Ref(this, options);\n  return this;\n};\n\n/**\n * Sets the value of a nested property within the given object.\n *\n * @param {*} obj - The object that will be crawled\n * @param {*} value - the value to assign\n * @param {$RefParserOptions} [options]\n *\n * @returns {*}\n * Returns the modified object, or an entirely new object if the entire object is overwritten.\n */\nPointer.prototype.set = function(obj, value, options) {\n  var tokens = Pointer.parse(this.path);\n  var token;\n\n  if (tokens.length === 0) {\n    // There are no tokens, replace the entire object with the new value\n    this.value = value;\n    return value;\n  }\n\n  // Crawl the object, one token at a time\n  this.value = obj;\n  for (var i = 0; i < tokens.length - 1; i++) {\n    resolveIf$Ref(this, options);\n\n    token = tokens[i];\n    if (this.value && this.value[token] !== undefined) {\n      // The token exists\n      this.value = this.value[token];\n    }\n    else {\n      // The token doesn't exist, so create it\n      this.value = setValue(this, token, {});\n    }\n  }\n\n  // Set the value of the final token\n  resolveIf$Ref(this, options);\n  token = tokens[tokens.length - 1];\n  setValue(this, token, value);\n\n  // Return the updated object\n  return obj;\n};\n\n/**\n * Parses a JSON pointer (or a path containing a JSON pointer in the hash)\n * and returns an array of the pointer's tokens.\n * (e.g. \"schema.json#/definitions/person/name\" => [\"definitions\", \"person\", \"name\"])\n *\n * The pointer is parsed according to RFC 6901\n * {@link https://tools.ietf.org/html/rfc6901#section-3}\n *\n * @param {string} path\n * @returns {string[]}\n */\nPointer.parse = function(path) {\n  // Get the JSON pointer from the path's hash\n  var pointer = util.path.getHash(path).substr(1);\n\n  // If there's no pointer, then there are no tokens,\n  // so return an empty array\n  if (!pointer) {\n    return [];\n  }\n\n  // Split into an array\n  pointer = pointer.split('/');\n\n  // Decode each part, according to RFC 6901\n  for (var i = 0; i < pointer.length; i++) {\n    pointer[i] = decodeURI(pointer[i].replace(escapedSlash, '/').replace(escapedTilde, '~'));\n  }\n\n  if (pointer[0] !== '') {\n    throw ono.syntax('Invalid $ref pointer \"%s\". Pointers must begin with \"#/\"', pointer);\n  }\n\n  return pointer.slice(1);\n};\n\n/**\n * Creates a JSON pointer path, by joining one or more tokens to a base path.\n *\n * @param {string} base - The base path (e.g. \"schema.json#/definitions/person\")\n * @param {string|string[]} tokens - The token(s) to append (e.g. [\"name\", \"first\"])\n * @returns {string}\n */\nPointer.join = function(base, tokens) {\n  // Ensure that the base path contains a hash\n  if (base.indexOf('#') === -1) {\n    base += '#';\n  }\n\n  // Append each token to the base path\n  tokens = Array.isArray(tokens) ? tokens : [tokens];\n  for (var i = 0; i < tokens.length; i++) {\n    var token = tokens[i];\n    // Encode the token, according to RFC 6901\n    base += '/' + encodeURI(token.replace(tildes, '~0').replace(slashes, '~1'));\n  }\n\n  return base;\n};\n\n/**\n * If the given pointer's {@link Pointer#value} is a JSON reference,\n * then the reference is resolved and {@link Pointer#value} is replaced with the resolved value.\n * In addition, {@link Pointer#path} and {@link Pointer#$ref} are updated to reflect the\n * resolution path of the new value.\n *\n * @param {Pointer} pointer\n * @param {$RefParserOptions} [options]\n * @returns {boolean} - Returns `true` if the resolution path changed\n */\nfunction resolveIf$Ref(pointer, options) {\n  // Is the value a JSON reference? (and allowed?)\n  if ($Ref.isAllowed$Ref(pointer.value, options)) {\n    var $refPath = url.resolve(pointer.path, pointer.value.$ref);\n\n    if ($refPath === pointer.path) {\n      // The value is a reference to itself, so there's nothing to do.\n      pointer.circular = true;\n    }\n    else {\n      // Does the JSON reference have other properties (other than \"$ref\")?\n      // If so, then don't resolve it, since it represents a new type\n      if (Object.keys(pointer.value).length === 1) {\n        // Resolve the reference\n        var resolved = pointer.$ref.$refs._resolve($refPath);\n        pointer.$ref = resolved.$ref;\n        pointer.path = resolved.path;\n        pointer.value = resolved.value;\n        return true;\n      }\n    }\n  }\n}\n\n/**\n * Sets the specified token value of the {@link Pointer#value}.\n *\n * The token is evaluated according to RFC 6901.\n * {@link https://tools.ietf.org/html/rfc6901#section-4}\n *\n * @param {Pointer} pointer - The JSON Pointer whose value will be modified\n * @param {string} token - A JSON Pointer token that indicates how to modify `obj`\n * @param {*} value - The value to assign\n * @returns {*} - Returns the assigned value\n */\nfunction setValue(pointer, token, value) {\n  if (pointer.value && typeof pointer.value === 'object') {\n    if (token === '-' && Array.isArray(pointer.value)) {\n      pointer.value.push(value);\n    }\n    else {\n      pointer.value[token] = value;\n    }\n  }\n  else {\n    throw ono.syntax('Error assigning $ref pointer \"%s\". \\nCannot set \"%s\" of a non-object.', pointer.path, token);\n  }\n  return value;\n}\n",
     "'use strict';\n\n/** @type {Promise} **/\nmodule.exports = typeof Promise === 'function' ? Promise : require('es6-promise').Promise;\n",
@@ -114,32 +113,32 @@
     "'use strict';\n\nvar Options = require('./options'),\n    util    = require('./util'),\n    ono     = require('ono');\n\nmodule.exports = $Refs;\n\n/**\n * This class is a map of JSON references and their resolved values.\n */\nfunction $Refs() {\n  /**\n   * Indicates whether the schema contains any circular references.\n   *\n   * @type {boolean}\n   */\n  this.circular = false;\n\n  /**\n   * A map of paths/urls to {@link $Ref} objects\n   *\n   * @type {object}\n   * @protected\n   */\n  this._$refs = {};\n}\n\n/**\n * Returns the paths of all the files/URLs that are referenced by the JSON schema,\n * including the schema itself.\n *\n * @param {...string|string[]} [types] - Only return paths of the given types (\"fs\", \"http\", \"https\")\n * @returns {string[]}\n */\n$Refs.prototype.paths = function(types) {\n  var paths = getPaths(this._$refs, arguments);\n  return paths.map(function(path) {\n    return path.decoded;\n  });\n};\n\n/**\n * Returns the map of JSON references and their resolved values.\n *\n * @param {...string|string[]} [types] - Only return references of the given types (\"fs\", \"http\", \"https\")\n * @returns {object}\n */\n$Refs.prototype.values = function(types) {\n  var $refs = this._$refs;\n  var paths = getPaths($refs, arguments);\n  return paths.reduce(function(obj, path) {\n    obj[path.decoded] = $refs[path.encoded].value;\n    return obj;\n  }, {});\n};\n\n/**\n * Returns a POJO (plain old JavaScript object) for serialization as JSON.\n *\n * @returns {object}\n */\n$Refs.prototype.toJSON = $Refs.prototype.values;\n\n/**\n * Determines whether the given JSON reference has expired.\n * Returns true if the reference does not exist.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n * @returns {boolean}\n */\n$Refs.prototype.isExpired = function(path) {\n  var $ref = this._get$Ref(path);\n  return $ref === undefined || $ref.isExpired();\n};\n\n/**\n * Immediately expires the given JSON reference.\n * If the reference does not exist, nothing happens.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n */\n$Refs.prototype.expire = function(path) {\n  var $ref = this._get$Ref(path);\n  if ($ref) {\n    $ref.expire();\n  }\n};\n\n/**\n * Determines whether the given JSON reference exists.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n * @returns {boolean}\n */\n$Refs.prototype.exists = function(path) {\n  try {\n    this._resolve(path);\n    return true;\n  }\n  catch (e) {\n    return false;\n  }\n};\n\n/**\n * Resolves the given JSON reference and returns the resolved value.\n *\n * @param {string} path - The full path being resolved, with a JSON pointer in the hash\n * @param {$RefParserOptions} options\n * @returns {*} - Returns the resolved value\n */\n$Refs.prototype.get = function(path, options) {\n  return this._resolve(path, options).value;\n};\n\n/**\n * Sets the value of a nested property within this {@link $Ref#value}.\n * If the property, or any of its parents don't exist, they will be created.\n *\n * @param {string} path - The full path of the property to set, optionally with a JSON pointer in the hash\n * @param {*} value - The value to assign\n * @param {$RefParserOptions} options\n */\n$Refs.prototype.set = function(path, value, options) {\n  var withoutHash = util.path.stripHash(path);\n  var $ref = this._$refs[withoutHash];\n\n  if (!$ref) {\n    throw ono('Error resolving $ref pointer \"%s\". \\n\"%s\" not found.', path, withoutHash);\n  }\n\n  options = new Options(options);\n  $ref.set(path, value, options);\n};\n\n/**\n * Resolves the given JSON reference.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n * @param {$RefParserOptions} options\n * @returns {Pointer}\n * @protected\n */\n$Refs.prototype._resolve = function(path, options) {\n  var withoutHash = util.path.stripHash(path);\n  var $ref = this._$refs[withoutHash];\n\n  if (!$ref) {\n    throw ono('Error resolving $ref pointer \"%s\". \\n\"%s\" not found.', path, withoutHash);\n  }\n\n  options = new Options(options);\n  return $ref.resolve(path, options);\n};\n\n/**\n * Returns the specified {@link $Ref} object, or undefined.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n * @returns {$Ref|undefined}\n * @protected\n */\n$Refs.prototype._get$Ref = function(path) {\n  var withoutHash = util.path.stripHash(path);\n  return this._$refs[withoutHash];\n};\n\n/**\n * Returns the encoded and decoded paths keys of the given object.\n *\n * @param {object} $refs - The object whose keys are URL-encoded paths\n * @param {...string|string[]} [types] - Only return paths of the given types (\"fs\", \"http\", \"https\")\n * @returns {object[]}\n */\nfunction getPaths($refs, types) {\n  var paths = Object.keys($refs);\n\n  // Filter the paths by type\n  types = Array.isArray(types[0]) ? types[0] : Array.prototype.slice.call(types);\n  if (types.length > 0 && types[0]) {\n    paths = paths.filter(function(key) {\n      return types.indexOf($refs[key].pathType) !== -1;\n    });\n  }\n\n  // Decode local filesystem paths\n  return paths.map(function(path) {\n    return {\n      encoded: path,\n      decoded: $refs[path].pathType === 'fs' ? util.path.urlToLocalPath(path) : path\n    };\n  });\n}\n",
     "'use strict';\n\nvar Promise = require('./promise'),\n    $Ref    = require('./ref'),\n    Pointer = require('./pointer'),\n    read    = require('./read'),\n    util    = require('./util'),\n    url     = require('url'),\n    ono     = require('ono');\n\nmodule.exports = resolve;\n\n/**\n * Crawls the JSON schema, finds all external JSON references, and resolves their values.\n * This method does not mutate the JSON schema. The resolved values are added to {@link $RefParser#$refs}.\n *\n * NOTE: We only care about EXTERNAL references here. INTERNAL references are only relevant when dereferencing.\n *\n * @param {$RefParser} parser\n * @param {$RefParserOptions} options\n *\n * @returns {Promise}\n * The promise resolves once all JSON references in the schema have been resolved,\n * including nested references that are contained in externally-referenced files.\n */\nfunction resolve(parser, options) {\n  try {\n    if (!options.$refs.external) {\n      // Nothing to resolve, so exit early\n      return Promise.resolve();\n    }\n\n    util.debug('Resolving $ref pointers in %s', parser._basePath);\n    var promises = crawl(parser.schema, parser._basePath + '#', '#', parser.$refs, options);\n    return Promise.all(promises);\n  }\n  catch (e) {\n    return Promise.reject(e);\n  }\n}\n\n/**\n * Recursively crawls the given value, and resolves any external JSON references.\n *\n * @param {*} obj - The value to crawl. If it's not an object or array, it will be ignored.\n * @param {string} path - The file path or URL used to resolve relative JSON references.\n * @param {string} pathFromRoot - The path to this point from the schema root\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n *\n * @returns {Promise[]}\n * Returns an array of promises. There will be one promise for each JSON reference in `obj`.\n * If `obj` does not contain any JSON references, then the array will be empty.\n * If any of the JSON references point to files that contain additional JSON references,\n * then the corresponding promise will internally reference an array of promises.\n */\nfunction crawl(obj, path, pathFromRoot, $refs, options) {\n  var promises = [];\n\n  if (obj && typeof obj === 'object') {\n    var keys = Object.keys(obj);\n\n    // If there's a \"definitions\" property, then crawl it FIRST.\n    // This is important when bundling, since the expected behavior\n    // is to bundle everything into definitions if possible.\n    var defs = keys.indexOf('definitions');\n    if (defs > 0) {\n      keys.splice(0, 0, keys.splice(defs, 1)[0]);\n    }\n\n    keys.forEach(function(key) {\n      var keyPath = Pointer.join(path, key);\n      var keyPathFromRoot = Pointer.join(pathFromRoot, key);\n      var value = obj[key];\n\n      if ($Ref.isExternal$Ref(value)) {\n        // We found a $ref\n        util.debug('Resolving $ref pointer \"%s\" at %s', value.$ref, keyPath);\n        var $refPath = url.resolve(path, value.$ref);\n\n        // Crawl the $referenced value\n        var promise = crawl$Ref($refPath, keyPathFromRoot, $refs, options)\n          .catch(function(err) {\n            throw ono.syntax(err, 'Error at %s', keyPath);\n          });\n        promises.push(promise);\n      }\n      else {\n        promises = promises.concat(crawl(value, keyPath, keyPathFromRoot, $refs, options));\n      }\n    });\n  }\n  return promises;\n}\n\n/**\n * Reads the file/URL at the given path, and then crawls the resulting value and resolves\n * any external JSON references.\n *\n * @param {string} path - The file path or URL to crawl\n * @param {string} pathFromRoot - The path to this point from the schema root\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n *\n * @returns {Promise}\n * The promise resolves once all JSON references in the object have been resolved,\n * including nested references that are contained in externally-referenced files.\n */\nfunction crawl$Ref(path, pathFromRoot, $refs, options) {\n  return read(path, $refs, options)\n    .then(function(cached$Ref) {\n      // If a cached $ref is returned, then we DON'T need to crawl it\n      if (!cached$Ref.cached) {\n        var $ref = cached$Ref.$ref;\n\n        // This is a new $ref, so store the path from the root of the JSON schema to this $ref\n        $ref.pathFromRoot = pathFromRoot;\n\n        // Crawl the new $ref\n        util.debug('Resolving $ref pointers in %s', $ref.path);\n        var promises = crawl($ref.value, $ref.path + '#', pathFromRoot, $refs, options);\n        return Promise.all(promises);\n      }\n    });\n}\n",
     "'use strict';\n\nvar debug               = require('debug'),\n    isWindows           = /^win/.test(process.platform),\n    forwardSlashPattern = /\\//g,\n    protocolPattern     = /^[a-z0-9.+-]+:\\/\\//i;\n\n// RegExp patterns to URL-encode special characters in local filesystem paths\nvar urlEncodePatterns = [\n  /\\?/g, '%3F',\n  /\\#/g, '%23',\n  isWindows ? /\\\\/g : /\\//, '/'\n];\n\n// RegExp patterns to URL-decode special characters for local filesystem paths\nvar urlDecodePatterns = [\n  /\\%23/g, '#',\n  /\\%24/g, '$',\n  /\\%26/g, '&',\n  /\\%2C/g, ',',\n  /\\%40/g, '@'\n];\n\n/**\n * Writes messages to stdout.\n * Log messages are suppressed by default, but can be enabled by setting the DEBUG variable.\n * @type {function}\n */\nexports.debug = debug('json-schema-ref-parser');\n\n/**\n * Utility functions for working with paths and URLs.\n */\nexports.path = {};\n\n/**\n * Returns the current working directory (in Node) or the current page URL (in browsers).\n *\n * @returns {string}\n */\nexports.path.cwd = function cwd() {\n  return process.browser ? location.href : process.cwd() + '/';\n};\n\n/**\n * Determines whether the given path is a URL.\n *\n * @param   {string} path\n * @returns {boolean}\n */\nexports.path.isUrl = function isUrl(path) {\n  return protocolPattern.test(path);\n};\n\n/**\n * If the given path is a local filesystem path, it is converted to a URL.\n *\n * @param {string} path\n * @returns {string}\n */\nexports.path.localPathToUrl = function localPathToUrl(path) {\n  if (!process.browser && !exports.path.isUrl(path)) {\n    // Manually encode characters that are not encoded by `encodeURI`\n    for (var i = 0; i < urlEncodePatterns.length; i += 2) {\n      path = path.replace(urlEncodePatterns[i], urlEncodePatterns[i + 1]);\n    }\n    path = encodeURI(path);\n  }\n  return path;\n};\n\n/**\n * Converts a URL to a local filesystem path\n *\n * @param {string} url\n * @returns {string}\n */\nexports.path.urlToLocalPath = function urlToLocalPath(url) {\n  url = decodeURI(url);\n  // Manually decode characters that are not decoded by `decodeURI`\n  for (var i = 0; i < urlDecodePatterns.length; i += 2) {\n    url = url.replace(urlDecodePatterns[i], urlDecodePatterns[i + 1]);\n  }\n  if (isWindows) {\n    url = url.replace(forwardSlashPattern, '\\\\');\n  }\n  return url;\n};\n\n/**\n * Returns the hash (URL fragment), if any, of the given path.\n *\n * @param   {string} path\n * @returns {string}\n */\nexports.path.getHash = function getHash(path) {\n  var hashIndex = path.indexOf('#');\n  if (hashIndex >= 0) {\n    return path.substr(hashIndex);\n  }\n  return '';\n};\n\n/**\n * Removes the hash (URL fragment), if any, from the given path.\n *\n * @param   {string} path\n * @returns {string}\n */\nexports.path.stripHash = function stripHash(path) {\n  var hashIndex = path.indexOf('#');\n  if (hashIndex >= 0) {\n    path = path.substr(0, hashIndex);\n  }\n  return path;\n};\n\n/**\n * Returns the file extension of the given path.\n *\n * @param   {string} path\n * @returns {string}\n */\nexports.path.extname = function extname(path) {\n  var lastDot = path.lastIndexOf('.');\n  if (lastDot >= 0) {\n    return path.substr(lastDot).toLowerCase();\n  }\n  return '';\n};\n",
-    "/* eslint lines-around-comment: [2, {beforeBlockComment: false}] */\n'use strict';\n\nvar yaml = require('js-yaml');\n\n/**\n * Simple YAML parsing functions, similar to {@link JSON.parse} and {@link JSON.stringify}\n */\nmodule.exports = {\n  /**\n   * Parses a YAML string and returns the value.\n   *\n   * @param {string} text - The YAML string to be parsed\n   * @param {function} [reviver] - Not currently supported. Provided for consistency with {@link JSON.parse}\n   * @returns {*}\n   */\n  parse: function yamlParse(text, reviver) {\n    return yaml.safeLoad(text);\n  },\n\n  /**\n   * Converts a JavaScript value to a YAML string.\n   *\n   * @param   {*} value - The value to convert to YAML\n   * @param   {function|array} replacer - Not currently supported. Provided for consistency with {@link JSON.stringify}\n   * @param   {string|number} space - The number of spaces to use for indentation, or a string containing the number of spaces.\n   * @returns {string}\n   */\n  stringify: function yamlStringify(value, replacer, space) {\n    var indent = (typeof space === 'string' ? space.length : space) || 2;\n    return yaml.safeDump(value, {indent: indent});\n  }\n};\n",
+    "/* eslint lines-around-comment: [2, {beforeBlockComment: false}] */\n'use strict';\n\nvar yaml = require('js-yaml'),\n    ono  = require('ono');\n\n/**\n * Simple YAML parsing functions, similar to {@link JSON.parse} and {@link JSON.stringify}\n */\nmodule.exports = {\n  /**\n   * Parses a YAML string and returns the value.\n   *\n   * @param {string} text - The YAML string to be parsed\n   * @param {function} [reviver] - Not currently supported. Provided for consistency with {@link JSON.parse}\n   * @returns {*}\n   */\n  parse: function yamlParse(text, reviver) {\n    try {\n      return yaml.safeLoad(text);\n    }\n    catch (e) {\n      if (e instanceof Error) {\n        throw e;\n      }\n      else {\n        // https://github.com/nodeca/js-yaml/issues/153\n        throw ono(e, e.message);\n      }\n    }\n  },\n\n  /**\n   * Converts a JavaScript value to a YAML string.\n   *\n   * @param   {*} value - The value to convert to YAML\n   * @param   {function|array} replacer - Not currently supported. Provided for consistency with {@link JSON.stringify}\n   * @param   {string|number} space - The number of spaces to use for indentation, or a string containing the number of spaces.\n   * @returns {string}\n   */\n  stringify: function yamlStringify(value, replacer, space) {\n    try {\n      var indent = (typeof space === 'string' ? space.length : space) || 2;\n      return yaml.safeDump(value, {indent: indent});\n    }\n    catch (e) {\n      if (e instanceof Error) {\n        throw e;\n      }\n      else {\n        // https://github.com/nodeca/js-yaml/issues/153\n        throw ono(e, e.message);\n      }\n    }\n  }\n};\n",
     "var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';\n\n;(function (exports) {\n\t'use strict';\n\n  var Arr = (typeof Uint8Array !== 'undefined')\n    ? Uint8Array\n    : Array\n\n\tvar PLUS   = '+'.charCodeAt(0)\n\tvar SLASH  = '/'.charCodeAt(0)\n\tvar NUMBER = '0'.charCodeAt(0)\n\tvar LOWER  = 'a'.charCodeAt(0)\n\tvar UPPER  = 'A'.charCodeAt(0)\n\tvar PLUS_URL_SAFE = '-'.charCodeAt(0)\n\tvar SLASH_URL_SAFE = '_'.charCodeAt(0)\n\n\tfunction decode (elt) {\n\t\tvar code = elt.charCodeAt(0)\n\t\tif (code === PLUS ||\n\t\t    code === PLUS_URL_SAFE)\n\t\t\treturn 62 // '+'\n\t\tif (code === SLASH ||\n\t\t    code === SLASH_URL_SAFE)\n\t\t\treturn 63 // '/'\n\t\tif (code < NUMBER)\n\t\t\treturn -1 //no match\n\t\tif (code < NUMBER + 10)\n\t\t\treturn code - NUMBER + 26 + 26\n\t\tif (code < UPPER + 26)\n\t\t\treturn code - UPPER\n\t\tif (code < LOWER + 26)\n\t\t\treturn code - LOWER + 26\n\t}\n\n\tfunction b64ToByteArray (b64) {\n\t\tvar i, j, l, tmp, placeHolders, arr\n\n\t\tif (b64.length % 4 > 0) {\n\t\t\tthrow new Error('Invalid string. Length must be a multiple of 4')\n\t\t}\n\n\t\t// the number of equal signs (place holders)\n\t\t// if there are two placeholders, than the two characters before it\n\t\t// represent one byte\n\t\t// if there is only one, then the three characters before it represent 2 bytes\n\t\t// this is just a cheap hack to not do indexOf twice\n\t\tvar len = b64.length\n\t\tplaceHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0\n\n\t\t// base64 is 4/3 + up to two characters of the original data\n\t\tarr = new Arr(b64.length * 3 / 4 - placeHolders)\n\n\t\t// if there are placeholders, only get up to the last complete 4 chars\n\t\tl = placeHolders > 0 ? b64.length - 4 : b64.length\n\n\t\tvar L = 0\n\n\t\tfunction push (v) {\n\t\t\tarr[L++] = v\n\t\t}\n\n\t\tfor (i = 0, j = 0; i < l; i += 4, j += 3) {\n\t\t\ttmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))\n\t\t\tpush((tmp & 0xFF0000) >> 16)\n\t\t\tpush((tmp & 0xFF00) >> 8)\n\t\t\tpush(tmp & 0xFF)\n\t\t}\n\n\t\tif (placeHolders === 2) {\n\t\t\ttmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)\n\t\t\tpush(tmp & 0xFF)\n\t\t} else if (placeHolders === 1) {\n\t\t\ttmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)\n\t\t\tpush((tmp >> 8) & 0xFF)\n\t\t\tpush(tmp & 0xFF)\n\t\t}\n\n\t\treturn arr\n\t}\n\n\tfunction uint8ToBase64 (uint8) {\n\t\tvar i,\n\t\t\textraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes\n\t\t\toutput = \"\",\n\t\t\ttemp, length\n\n\t\tfunction encode (num) {\n\t\t\treturn lookup.charAt(num)\n\t\t}\n\n\t\tfunction tripletToBase64 (num) {\n\t\t\treturn encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)\n\t\t}\n\n\t\t// go through the array every three bytes, we'll deal with trailing stuff later\n\t\tfor (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {\n\t\t\ttemp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])\n\t\t\toutput += tripletToBase64(temp)\n\t\t}\n\n\t\t// pad the end with zeros, but make sure to not forget the extra bytes\n\t\tswitch (extraBytes) {\n\t\t\tcase 1:\n\t\t\t\ttemp = uint8[uint8.length - 1]\n\t\t\t\toutput += encode(temp >> 2)\n\t\t\t\toutput += encode((temp << 4) & 0x3F)\n\t\t\t\toutput += '=='\n\t\t\t\tbreak\n\t\t\tcase 2:\n\t\t\t\ttemp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])\n\t\t\t\toutput += encode(temp >> 10)\n\t\t\t\toutput += encode((temp >> 4) & 0x3F)\n\t\t\t\toutput += encode((temp << 2) & 0x3F)\n\t\t\t\toutput += '='\n\t\t\t\tbreak\n\t\t}\n\n\t\treturn output\n\t}\n\n\texports.toByteArray = b64ToByteArray\n\texports.fromByteArray = uint8ToBase64\n}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))\n",
-    null,
-    "/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('is-array')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\nBuffer.poolSize = 8192 // not used by this implementation\n\nvar rootParent = {}\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property\n *     on objects.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\nfunction typedArraySupport () {\n  function Bar () {}\n  try {\n    var arr = new Uint8Array(1)\n    arr.foo = function () { return 42 }\n    arr.constructor = Bar\n    return arr.foo() === 42 && // typed array instances can be augmented\n        arr.constructor === Bar && // constructor can be set\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\n/**\n * Class: Buffer\n * =============\n *\n * The Buffer constructor returns instances of `Uint8Array` that are augmented\n * with function properties for all the node `Buffer` API functions. We use\n * `Uint8Array` so that square bracket notation works as expected -- it returns\n * a single octet.\n *\n * By augmenting the instances, we can avoid modifying the `Uint8Array`\n * prototype.\n */\nfunction Buffer (arg) {\n  if (!(this instanceof Buffer)) {\n    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.\n    if (arguments.length > 1) return new Buffer(arg, arguments[1])\n    return new Buffer(arg)\n  }\n\n  this.length = 0\n  this.parent = undefined\n\n  // Common case.\n  if (typeof arg === 'number') {\n    return fromNumber(this, arg)\n  }\n\n  // Slightly less common case.\n  if (typeof arg === 'string') {\n    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')\n  }\n\n  // Unusual.\n  return fromObject(this, arg)\n}\n\nfunction fromNumber (that, length) {\n  that = allocate(that, length < 0 ? 0 : checked(length) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < length; i++) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'\n\n  // Assumption: byteLength() return value is always < kMaxLength.\n  var length = byteLength(string, encoding) | 0\n  that = allocate(that, length)\n\n  that.write(string, encoding)\n  return that\n}\n\nfunction fromObject (that, object) {\n  if (Buffer.isBuffer(object)) return fromBuffer(that, object)\n\n  if (isArray(object)) return fromArray(that, object)\n\n  if (object == null) {\n    throw new TypeError('must start with number, buffer, array or string')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined') {\n    if (object.buffer instanceof ArrayBuffer) {\n      return fromTypedArray(that, object)\n    }\n    if (object instanceof ArrayBuffer) {\n      return fromArrayBuffer(that, object)\n    }\n  }\n\n  if (object.length) return fromArrayLike(that, object)\n\n  return fromJsonObject(that, object)\n}\n\nfunction fromBuffer (that, buffer) {\n  var length = checked(buffer.length) | 0\n  that = allocate(that, length)\n  buffer.copy(that, 0, 0, length)\n  return that\n}\n\nfunction fromArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Duplicate of fromArray() to keep fromArray() monomorphic.\nfunction fromTypedArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  // Truncating the elements is probably not what people expect from typed\n  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior\n  // of the old Buffer constructor.\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    array.byteLength\n    that = Buffer._augment(new Uint8Array(array))\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromTypedArray(that, new Uint8Array(array))\n  }\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.\n// Returns a zero-length buffer for inputs that don't conform to the spec.\nfunction fromJsonObject (that, object) {\n  var array\n  var length = 0\n\n  if (object.type === 'Buffer' && isArray(object.data)) {\n    array = object.data\n    length = checked(array.length) | 0\n  }\n  that = allocate(that, length)\n\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n}\n\nfunction allocate (that, length) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = Buffer._augment(new Uint8Array(length))\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that.length = length\n    that._isBuffer = true\n  }\n\n  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1\n  if (fromPool) that.parent = rootParent\n\n  return that\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (subject, encoding) {\n  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)\n\n  var buf = new Buffer(subject, encoding)\n  delete buf.parent\n  return buf\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  var i = 0\n  var len = Math.min(x, y)\n  while (i < len) {\n    if (a[i] !== b[i]) break\n\n    ++i\n  }\n\n  if (i !== len) {\n    x = a[i]\n    y = b[i]\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'binary':\n    case 'base64':\n    case 'raw':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')\n\n  if (list.length === 0) {\n    return new Buffer(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; i++) {\n      length += list[i].length\n    }\n  }\n\n  var buf = new Buffer(length)\n  var pos = 0\n  for (i = 0; i < list.length; i++) {\n    var item = list[i]\n    item.copy(buf, pos)\n    pos += item.length\n  }\n  return buf\n}\n\nfunction byteLength (string, encoding) {\n  if (typeof string !== 'string') string = '' + string\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'binary':\n      // Deprecated\n      case 'raw':\n      case 'raws':\n        return len\n      case 'utf8':\n      case 'utf-8':\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\n// pre-set for values that may exist in the future\nBuffer.prototype.length = undefined\nBuffer.prototype.parent = undefined\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  start = start | 0\n  end = end === undefined || end === Infinity ? this.length : end | 0\n\n  if (!encoding) encoding = 'utf8'\n  if (start < 0) start = 0\n  if (end > this.length) end = this.length\n  if (end <= start) return ''\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'binary':\n        return binarySlice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return 0\n  return Buffer.compare(this, b)\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset) {\n  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff\n  else if (byteOffset < -0x80000000) byteOffset = -0x80000000\n  byteOffset >>= 0\n\n  if (this.length === 0) return -1\n  if (byteOffset >= this.length) return -1\n\n  // Negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)\n\n  if (typeof val === 'string') {\n    if (val.length === 0) return -1 // special case: looking for empty string always fails\n    return String.prototype.indexOf.call(this, val, byteOffset)\n  }\n  if (Buffer.isBuffer(val)) {\n    return arrayIndexOf(this, val, byteOffset)\n  }\n  if (typeof val === 'number') {\n    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {\n      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)\n    }\n    return arrayIndexOf(this, [ val ], byteOffset)\n  }\n\n  function arrayIndexOf (arr, val, byteOffset) {\n    var foundIndex = -1\n    for (var i = 0; byteOffset + i < arr.length; i++) {\n      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex\n      } else {\n        foundIndex = -1\n      }\n    }\n    return -1\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\n// `get` is deprecated\nBuffer.prototype.get = function get (offset) {\n  console.log('.get() is deprecated. Access using array indexes instead.')\n  return this.readUInt8(offset)\n}\n\n// `set` is deprecated\nBuffer.prototype.set = function set (v, offset) {\n  console.log('.set() is deprecated. Access using array indexes instead.')\n  return this.writeUInt8(v, offset)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new Error('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; i++) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) throw new Error('Invalid hex string')\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction binaryWrite (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    var swap = encoding\n    encoding = offset\n    offset = length | 0\n    length = swap\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'binary':\n        return binaryWrite(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction binarySlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; i++) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = Buffer._augment(this.subarray(start, end))\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; i++) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  if (newBuf.length) newBuf.parent = this.parent || this\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n  if (offset < 0) throw new RangeError('index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; i--) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; i++) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    target._set(this.subarray(start, start + len), targetStart)\n  }\n\n  return len\n}\n\n// fill(value, start=0, end=buffer.length)\nBuffer.prototype.fill = function fill (value, start, end) {\n  if (!value) value = 0\n  if (!start) start = 0\n  if (!end) end = this.length\n\n  if (end < start) throw new RangeError('end < start')\n\n  // Fill 0 bytes; we're done\n  if (end === start) return\n  if (this.length === 0) return\n\n  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')\n  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')\n\n  var i\n  if (typeof value === 'number') {\n    for (i = start; i < end; i++) {\n      this[i] = value\n    }\n  } else {\n    var bytes = utf8ToBytes(value.toString())\n    var len = bytes.length\n    for (i = start; i < end; i++) {\n      this[i] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n/**\n * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.\n * Added in Node 0.12. Only available in browsers that support ArrayBuffer.\n */\nBuffer.prototype.toArrayBuffer = function toArrayBuffer () {\n  if (typeof Uint8Array !== 'undefined') {\n    if (Buffer.TYPED_ARRAY_SUPPORT) {\n      return (new Buffer(this)).buffer\n    } else {\n      var buf = new Uint8Array(this.length)\n      for (var i = 0, len = buf.length; i < len; i += 1) {\n        buf[i] = this[i]\n      }\n      return buf.buffer\n    }\n  } else {\n    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')\n  }\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar BP = Buffer.prototype\n\n/**\n * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods\n */\nBuffer._augment = function _augment (arr) {\n  arr.constructor = Buffer\n  arr._isBuffer = true\n\n  // save reference to original Uint8Array set method before overwriting\n  arr._set = arr.set\n\n  // deprecated\n  arr.get = BP.get\n  arr.set = BP.set\n\n  arr.write = BP.write\n  arr.toString = BP.toString\n  arr.toLocaleString = BP.toString\n  arr.toJSON = BP.toJSON\n  arr.equals = BP.equals\n  arr.compare = BP.compare\n  arr.indexOf = BP.indexOf\n  arr.copy = BP.copy\n  arr.slice = BP.slice\n  arr.readUIntLE = BP.readUIntLE\n  arr.readUIntBE = BP.readUIntBE\n  arr.readUInt8 = BP.readUInt8\n  arr.readUInt16LE = BP.readUInt16LE\n  arr.readUInt16BE = BP.readUInt16BE\n  arr.readUInt32LE = BP.readUInt32LE\n  arr.readUInt32BE = BP.readUInt32BE\n  arr.readIntLE = BP.readIntLE\n  arr.readIntBE = BP.readIntBE\n  arr.readInt8 = BP.readInt8\n  arr.readInt16LE = BP.readInt16LE\n  arr.readInt16BE = BP.readInt16BE\n  arr.readInt32LE = BP.readInt32LE\n  arr.readInt32BE = BP.readInt32BE\n  arr.readFloatLE = BP.readFloatLE\n  arr.readFloatBE = BP.readFloatBE\n  arr.readDoubleLE = BP.readDoubleLE\n  arr.readDoubleBE = BP.readDoubleBE\n  arr.writeUInt8 = BP.writeUInt8\n  arr.writeUIntLE = BP.writeUIntLE\n  arr.writeUIntBE = BP.writeUIntBE\n  arr.writeUInt16LE = BP.writeUInt16LE\n  arr.writeUInt16BE = BP.writeUInt16BE\n  arr.writeUInt32LE = BP.writeUInt32LE\n  arr.writeUInt32BE = BP.writeUInt32BE\n  arr.writeIntLE = BP.writeIntLE\n  arr.writeIntBE = BP.writeIntBE\n  arr.writeInt8 = BP.writeInt8\n  arr.writeInt16LE = BP.writeInt16LE\n  arr.writeInt16BE = BP.writeInt16BE\n  arr.writeInt32LE = BP.writeInt32LE\n  arr.writeInt32BE = BP.writeInt32BE\n  arr.writeFloatLE = BP.writeFloatLE\n  arr.writeFloatBE = BP.writeFloatBE\n  arr.writeDoubleLE = BP.writeDoubleLE\n  arr.writeDoubleBE = BP.writeDoubleBE\n  arr.fill = BP.fill\n  arr.inspect = BP.inspect\n  arr.toArrayBuffer = BP.toArrayBuffer\n\n  return arr\n}\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; i++) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00 | 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; i++) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n",
+    "",
+    "/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\nBuffer.poolSize = 8192 // not used by this implementation\n\nvar rootParent = {}\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property\n *     on objects.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\nfunction typedArraySupport () {\n  function Bar () {}\n  try {\n    var arr = new Uint8Array(1)\n    arr.foo = function () { return 42 }\n    arr.constructor = Bar\n    return arr.foo() === 42 && // typed array instances can be augmented\n        arr.constructor === Bar && // constructor can be set\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\n/**\n * Class: Buffer\n * =============\n *\n * The Buffer constructor returns instances of `Uint8Array` that are augmented\n * with function properties for all the node `Buffer` API functions. We use\n * `Uint8Array` so that square bracket notation works as expected -- it returns\n * a single octet.\n *\n * By augmenting the instances, we can avoid modifying the `Uint8Array`\n * prototype.\n */\nfunction Buffer (arg) {\n  if (!(this instanceof Buffer)) {\n    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.\n    if (arguments.length > 1) return new Buffer(arg, arguments[1])\n    return new Buffer(arg)\n  }\n\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    this.length = 0\n    this.parent = undefined\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    return fromNumber(this, arg)\n  }\n\n  // Slightly less common case.\n  if (typeof arg === 'string') {\n    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')\n  }\n\n  // Unusual.\n  return fromObject(this, arg)\n}\n\nfunction fromNumber (that, length) {\n  that = allocate(that, length < 0 ? 0 : checked(length) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < length; i++) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'\n\n  // Assumption: byteLength() return value is always < kMaxLength.\n  var length = byteLength(string, encoding) | 0\n  that = allocate(that, length)\n\n  that.write(string, encoding)\n  return that\n}\n\nfunction fromObject (that, object) {\n  if (Buffer.isBuffer(object)) return fromBuffer(that, object)\n\n  if (isArray(object)) return fromArray(that, object)\n\n  if (object == null) {\n    throw new TypeError('must start with number, buffer, array or string')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined') {\n    if (object.buffer instanceof ArrayBuffer) {\n      return fromTypedArray(that, object)\n    }\n    if (object instanceof ArrayBuffer) {\n      return fromArrayBuffer(that, object)\n    }\n  }\n\n  if (object.length) return fromArrayLike(that, object)\n\n  return fromJsonObject(that, object)\n}\n\nfunction fromBuffer (that, buffer) {\n  var length = checked(buffer.length) | 0\n  that = allocate(that, length)\n  buffer.copy(that, 0, 0, length)\n  return that\n}\n\nfunction fromArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Duplicate of fromArray() to keep fromArray() monomorphic.\nfunction fromTypedArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  // Truncating the elements is probably not what people expect from typed\n  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior\n  // of the old Buffer constructor.\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    array.byteLength\n    that = Buffer._augment(new Uint8Array(array))\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromTypedArray(that, new Uint8Array(array))\n  }\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.\n// Returns a zero-length buffer for inputs that don't conform to the spec.\nfunction fromJsonObject (that, object) {\n  var array\n  var length = 0\n\n  if (object.type === 'Buffer' && isArray(object.data)) {\n    array = object.data\n    length = checked(array.length) | 0\n  }\n  that = allocate(that, length)\n\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n} else {\n  // pre-set for values that may exist in the future\n  Buffer.prototype.length = undefined\n  Buffer.prototype.parent = undefined\n}\n\nfunction allocate (that, length) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = Buffer._augment(new Uint8Array(length))\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that.length = length\n    that._isBuffer = true\n  }\n\n  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1\n  if (fromPool) that.parent = rootParent\n\n  return that\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (subject, encoding) {\n  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)\n\n  var buf = new Buffer(subject, encoding)\n  delete buf.parent\n  return buf\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  var i = 0\n  var len = Math.min(x, y)\n  while (i < len) {\n    if (a[i] !== b[i]) break\n\n    ++i\n  }\n\n  if (i !== len) {\n    x = a[i]\n    y = b[i]\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'binary':\n    case 'base64':\n    case 'raw':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')\n\n  if (list.length === 0) {\n    return new Buffer(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; i++) {\n      length += list[i].length\n    }\n  }\n\n  var buf = new Buffer(length)\n  var pos = 0\n  for (i = 0; i < list.length; i++) {\n    var item = list[i]\n    item.copy(buf, pos)\n    pos += item.length\n  }\n  return buf\n}\n\nfunction byteLength (string, encoding) {\n  if (typeof string !== 'string') string = '' + string\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'binary':\n      // Deprecated\n      case 'raw':\n      case 'raws':\n        return len\n      case 'utf8':\n      case 'utf-8':\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  start = start | 0\n  end = end === undefined || end === Infinity ? this.length : end | 0\n\n  if (!encoding) encoding = 'utf8'\n  if (start < 0) start = 0\n  if (end > this.length) end = this.length\n  if (end <= start) return ''\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'binary':\n        return binarySlice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return 0\n  return Buffer.compare(this, b)\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset) {\n  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff\n  else if (byteOffset < -0x80000000) byteOffset = -0x80000000\n  byteOffset >>= 0\n\n  if (this.length === 0) return -1\n  if (byteOffset >= this.length) return -1\n\n  // Negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)\n\n  if (typeof val === 'string') {\n    if (val.length === 0) return -1 // special case: looking for empty string always fails\n    return String.prototype.indexOf.call(this, val, byteOffset)\n  }\n  if (Buffer.isBuffer(val)) {\n    return arrayIndexOf(this, val, byteOffset)\n  }\n  if (typeof val === 'number') {\n    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {\n      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)\n    }\n    return arrayIndexOf(this, [ val ], byteOffset)\n  }\n\n  function arrayIndexOf (arr, val, byteOffset) {\n    var foundIndex = -1\n    for (var i = 0; byteOffset + i < arr.length; i++) {\n      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex\n      } else {\n        foundIndex = -1\n      }\n    }\n    return -1\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\n// `get` is deprecated\nBuffer.prototype.get = function get (offset) {\n  console.log('.get() is deprecated. Access using array indexes instead.')\n  return this.readUInt8(offset)\n}\n\n// `set` is deprecated\nBuffer.prototype.set = function set (v, offset) {\n  console.log('.set() is deprecated. Access using array indexes instead.')\n  return this.writeUInt8(v, offset)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new Error('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; i++) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) throw new Error('Invalid hex string')\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction binaryWrite (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    var swap = encoding\n    encoding = offset\n    offset = length | 0\n    length = swap\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'binary':\n        return binaryWrite(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction binarySlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; i++) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = Buffer._augment(this.subarray(start, end))\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; i++) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  if (newBuf.length) newBuf.parent = this.parent || this\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n  if (offset < 0) throw new RangeError('index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; i--) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; i++) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    target._set(this.subarray(start, start + len), targetStart)\n  }\n\n  return len\n}\n\n// fill(value, start=0, end=buffer.length)\nBuffer.prototype.fill = function fill (value, start, end) {\n  if (!value) value = 0\n  if (!start) start = 0\n  if (!end) end = this.length\n\n  if (end < start) throw new RangeError('end < start')\n\n  // Fill 0 bytes; we're done\n  if (end === start) return\n  if (this.length === 0) return\n\n  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')\n  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')\n\n  var i\n  if (typeof value === 'number') {\n    for (i = start; i < end; i++) {\n      this[i] = value\n    }\n  } else {\n    var bytes = utf8ToBytes(value.toString())\n    var len = bytes.length\n    for (i = start; i < end; i++) {\n      this[i] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n/**\n * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.\n * Added in Node 0.12. Only available in browsers that support ArrayBuffer.\n */\nBuffer.prototype.toArrayBuffer = function toArrayBuffer () {\n  if (typeof Uint8Array !== 'undefined') {\n    if (Buffer.TYPED_ARRAY_SUPPORT) {\n      return (new Buffer(this)).buffer\n    } else {\n      var buf = new Uint8Array(this.length)\n      for (var i = 0, len = buf.length; i < len; i += 1) {\n        buf[i] = this[i]\n      }\n      return buf.buffer\n    }\n  } else {\n    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')\n  }\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar BP = Buffer.prototype\n\n/**\n * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods\n */\nBuffer._augment = function _augment (arr) {\n  arr.constructor = Buffer\n  arr._isBuffer = true\n\n  // save reference to original Uint8Array set method before overwriting\n  arr._set = arr.set\n\n  // deprecated\n  arr.get = BP.get\n  arr.set = BP.set\n\n  arr.write = BP.write\n  arr.toString = BP.toString\n  arr.toLocaleString = BP.toString\n  arr.toJSON = BP.toJSON\n  arr.equals = BP.equals\n  arr.compare = BP.compare\n  arr.indexOf = BP.indexOf\n  arr.copy = BP.copy\n  arr.slice = BP.slice\n  arr.readUIntLE = BP.readUIntLE\n  arr.readUIntBE = BP.readUIntBE\n  arr.readUInt8 = BP.readUInt8\n  arr.readUInt16LE = BP.readUInt16LE\n  arr.readUInt16BE = BP.readUInt16BE\n  arr.readUInt32LE = BP.readUInt32LE\n  arr.readUInt32BE = BP.readUInt32BE\n  arr.readIntLE = BP.readIntLE\n  arr.readIntBE = BP.readIntBE\n  arr.readInt8 = BP.readInt8\n  arr.readInt16LE = BP.readInt16LE\n  arr.readInt16BE = BP.readInt16BE\n  arr.readInt32LE = BP.readInt32LE\n  arr.readInt32BE = BP.readInt32BE\n  arr.readFloatLE = BP.readFloatLE\n  arr.readFloatBE = BP.readFloatBE\n  arr.readDoubleLE = BP.readDoubleLE\n  arr.readDoubleBE = BP.readDoubleBE\n  arr.writeUInt8 = BP.writeUInt8\n  arr.writeUIntLE = BP.writeUIntLE\n  arr.writeUIntBE = BP.writeUIntBE\n  arr.writeUInt16LE = BP.writeUInt16LE\n  arr.writeUInt16BE = BP.writeUInt16BE\n  arr.writeUInt32LE = BP.writeUInt32LE\n  arr.writeUInt32BE = BP.writeUInt32BE\n  arr.writeIntLE = BP.writeIntLE\n  arr.writeIntBE = BP.writeIntBE\n  arr.writeInt8 = BP.writeInt8\n  arr.writeInt16LE = BP.writeInt16LE\n  arr.writeInt16BE = BP.writeInt16BE\n  arr.writeInt32LE = BP.writeInt32LE\n  arr.writeInt32BE = BP.writeInt32BE\n  arr.writeFloatLE = BP.writeFloatLE\n  arr.writeFloatBE = BP.writeFloatBE\n  arr.writeDoubleLE = BP.writeDoubleLE\n  arr.writeDoubleBE = BP.writeDoubleBE\n  arr.fill = BP.fill\n  arr.inspect = BP.inspect\n  arr.toArrayBuffer = BP.toArrayBuffer\n\n  return arr\n}\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; i++) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; i++) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n",
+    "var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n",
     "module.exports = {\n  \"100\": \"Continue\",\n  \"101\": \"Switching Protocols\",\n  \"102\": \"Processing\",\n  \"200\": \"OK\",\n  \"201\": \"Created\",\n  \"202\": \"Accepted\",\n  \"203\": \"Non-Authoritative Information\",\n  \"204\": \"No Content\",\n  \"205\": \"Reset Content\",\n  \"206\": \"Partial Content\",\n  \"207\": \"Multi-Status\",\n  \"300\": \"Multiple Choices\",\n  \"301\": \"Moved Permanently\",\n  \"302\": \"Moved Temporarily\",\n  \"303\": \"See Other\",\n  \"304\": \"Not Modified\",\n  \"305\": \"Use Proxy\",\n  \"307\": \"Temporary Redirect\",\n  \"308\": \"Permanent Redirect\",\n  \"400\": \"Bad Request\",\n  \"401\": \"Unauthorized\",\n  \"402\": \"Payment Required\",\n  \"403\": \"Forbidden\",\n  \"404\": \"Not Found\",\n  \"405\": \"Method Not Allowed\",\n  \"406\": \"Not Acceptable\",\n  \"407\": \"Proxy Authentication Required\",\n  \"408\": \"Request Time-out\",\n  \"409\": \"Conflict\",\n  \"410\": \"Gone\",\n  \"411\": \"Length Required\",\n  \"412\": \"Precondition Failed\",\n  \"413\": \"Request Entity Too Large\",\n  \"414\": \"Request-URI Too Large\",\n  \"415\": \"Unsupported Media Type\",\n  \"416\": \"Requested Range Not Satisfiable\",\n  \"417\": \"Expectation Failed\",\n  \"418\": \"I'm a teapot\",\n  \"422\": \"Unprocessable Entity\",\n  \"423\": \"Locked\",\n  \"424\": \"Failed Dependency\",\n  \"425\": \"Unordered Collection\",\n  \"426\": \"Upgrade Required\",\n  \"428\": \"Precondition Required\",\n  \"429\": \"Too Many Requests\",\n  \"431\": \"Request Header Fields Too Large\",\n  \"500\": \"Internal Server Error\",\n  \"501\": \"Not Implemented\",\n  \"502\": \"Bad Gateway\",\n  \"503\": \"Service Unavailable\",\n  \"504\": \"Gateway Time-out\",\n  \"505\": \"HTTP Version Not Supported\",\n  \"506\": \"Variant Also Negotiates\",\n  \"507\": \"Insufficient Storage\",\n  \"509\": \"Bandwidth Limit Exceeded\",\n  \"510\": \"Not Extended\",\n  \"511\": \"Network Authentication Required\"\n}\n",
     "\"use strict\"\n\nvar next = (global.process && process.nextTick) || global.setImmediate || function (f) {\n  setTimeout(f, 0)\n}\n\nmodule.exports = function maybe (cb, promise) {\n  if (cb) {\n    promise\n      .then(function (result) {\n        next(function () { cb(null, result) })\n      }, function (err) {\n        next(function () { cb(err) })\n      })\n    return undefined\n  }\n  else {\n    return promise\n  }\n}\n",
-    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// NOTE: These type checking functions intentionally don't use `instanceof`\n// because it is fragile and can be easily faked with `Object.create()`.\nfunction isArray(ar) {\n  return Array.isArray(ar);\n}\nexports.isArray = isArray;\n\nfunction isBoolean(arg) {\n  return typeof arg === 'boolean';\n}\nexports.isBoolean = isBoolean;\n\nfunction isNull(arg) {\n  return arg === null;\n}\nexports.isNull = isNull;\n\nfunction isNullOrUndefined(arg) {\n  return arg == null;\n}\nexports.isNullOrUndefined = isNullOrUndefined;\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\nexports.isNumber = isNumber;\n\nfunction isString(arg) {\n  return typeof arg === 'string';\n}\nexports.isString = isString;\n\nfunction isSymbol(arg) {\n  return typeof arg === 'symbol';\n}\nexports.isSymbol = isSymbol;\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\nexports.isUndefined = isUndefined;\n\nfunction isRegExp(re) {\n  return isObject(re) && objectToString(re) === '[object RegExp]';\n}\nexports.isRegExp = isRegExp;\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\nexports.isObject = isObject;\n\nfunction isDate(d) {\n  return isObject(d) && objectToString(d) === '[object Date]';\n}\nexports.isDate = isDate;\n\nfunction isError(e) {\n  return isObject(e) &&\n      (objectToString(e) === '[object Error]' || e instanceof Error);\n}\nexports.isError = isError;\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\nexports.isFunction = isFunction;\n\nfunction isPrimitive(arg) {\n  return arg === null ||\n         typeof arg === 'boolean' ||\n         typeof arg === 'number' ||\n         typeof arg === 'string' ||\n         typeof arg === 'symbol' ||  // ES6 symbol\n         typeof arg === 'undefined';\n}\nexports.isPrimitive = isPrimitive;\n\nfunction isBuffer(arg) {\n  return Buffer.isBuffer(arg);\n}\nexports.isBuffer = isBuffer;\n\nfunction objectToString(o) {\n  return Object.prototype.toString.call(o);\n}",
+    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// NOTE: These type checking functions intentionally don't use `instanceof`\n// because it is fragile and can be easily faked with `Object.create()`.\n\nfunction isArray(arg) {\n  if (Array.isArray) {\n    return Array.isArray(arg);\n  }\n  return objectToString(arg) === '[object Array]';\n}\nexports.isArray = isArray;\n\nfunction isBoolean(arg) {\n  return typeof arg === 'boolean';\n}\nexports.isBoolean = isBoolean;\n\nfunction isNull(arg) {\n  return arg === null;\n}\nexports.isNull = isNull;\n\nfunction isNullOrUndefined(arg) {\n  return arg == null;\n}\nexports.isNullOrUndefined = isNullOrUndefined;\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\nexports.isNumber = isNumber;\n\nfunction isString(arg) {\n  return typeof arg === 'string';\n}\nexports.isString = isString;\n\nfunction isSymbol(arg) {\n  return typeof arg === 'symbol';\n}\nexports.isSymbol = isSymbol;\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\nexports.isUndefined = isUndefined;\n\nfunction isRegExp(re) {\n  return objectToString(re) === '[object RegExp]';\n}\nexports.isRegExp = isRegExp;\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\nexports.isObject = isObject;\n\nfunction isDate(d) {\n  return objectToString(d) === '[object Date]';\n}\nexports.isDate = isDate;\n\nfunction isError(e) {\n  return (objectToString(e) === '[object Error]' || e instanceof Error);\n}\nexports.isError = isError;\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\nexports.isFunction = isFunction;\n\nfunction isPrimitive(arg) {\n  return arg === null ||\n         typeof arg === 'boolean' ||\n         typeof arg === 'number' ||\n         typeof arg === 'string' ||\n         typeof arg === 'symbol' ||  // ES6 symbol\n         typeof arg === 'undefined';\n}\nexports.isPrimitive = isPrimitive;\n\nexports.isBuffer = Buffer.isBuffer;\n\nfunction objectToString(o) {\n  return Object.prototype.toString.call(o);\n}\n",
     "\n/**\n * This is the web browser implementation of `debug()`.\n *\n * Expose `debug()` as the module.\n */\n\nexports = module.exports = require('./debug');\nexports.log = log;\nexports.formatArgs = formatArgs;\nexports.save = save;\nexports.load = load;\nexports.useColors = useColors;\nexports.storage = 'undefined' != typeof chrome\n               && 'undefined' != typeof chrome.storage\n                  ? chrome.storage.local\n                  : localstorage();\n\n/**\n * Colors.\n */\n\nexports.colors = [\n  'lightseagreen',\n  'forestgreen',\n  'goldenrod',\n  'dodgerblue',\n  'darkorchid',\n  'crimson'\n];\n\n/**\n * Currently only WebKit-based Web Inspectors, Firefox >= v31,\n * and the Firebug extension (any Firefox version) are known\n * to support \"%c\" CSS customizations.\n *\n * TODO: add a `localStorage` variable to explicitly enable/disable colors\n */\n\nfunction useColors() {\n  // is webkit? http://stackoverflow.com/a/16459606/376773\n  return ('WebkitAppearance' in document.documentElement.style) ||\n    // is firebug? http://stackoverflow.com/a/398120/376773\n    (window.console && (console.firebug || (console.exception && console.table))) ||\n    // is firefox >= v31?\n    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages\n    (navigator.userAgent.toLowerCase().match(/firefox\\/(\\d+)/) && parseInt(RegExp.$1, 10) >= 31);\n}\n\n/**\n * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.\n */\n\nexports.formatters.j = function(v) {\n  return JSON.stringify(v);\n};\n\n\n/**\n * Colorize log arguments if enabled.\n *\n * @api public\n */\n\nfunction formatArgs() {\n  var args = arguments;\n  var useColors = this.useColors;\n\n  args[0] = (useColors ? '%c' : '')\n    + this.namespace\n    + (useColors ? ' %c' : ' ')\n    + args[0]\n    + (useColors ? '%c ' : ' ')\n    + '+' + exports.humanize(this.diff);\n\n  if (!useColors) return args;\n\n  var c = 'color: ' + this.color;\n  args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));\n\n  // the final \"%c\" is somewhat tricky, because there could be other\n  // arguments passed either before or after the %c, so we need to\n  // figure out the correct index to insert the CSS into\n  var index = 0;\n  var lastC = 0;\n  args[0].replace(/%[a-z%]/g, function(match) {\n    if ('%%' === match) return;\n    index++;\n    if ('%c' === match) {\n      // we only are interested in the *last* %c\n      // (the user may have provided their own)\n      lastC = index;\n    }\n  });\n\n  args.splice(lastC, 0, c);\n  return args;\n}\n\n/**\n * Invokes `console.log()` when available.\n * No-op when `console.log` is not a \"function\".\n *\n * @api public\n */\n\nfunction log() {\n  // this hackery is required for IE8/9, where\n  // the `console.log` function doesn't have 'apply'\n  return 'object' === typeof console\n    && console.log\n    && Function.prototype.apply.call(console.log, console, arguments);\n}\n\n/**\n * Save `namespaces`.\n *\n * @param {String} namespaces\n * @api private\n */\n\nfunction save(namespaces) {\n  try {\n    if (null == namespaces) {\n      exports.storage.removeItem('debug');\n    } else {\n      exports.storage.debug = namespaces;\n    }\n  } catch(e) {}\n}\n\n/**\n * Load `namespaces`.\n *\n * @return {String} returns the previously persisted debug modes\n * @api private\n */\n\nfunction load() {\n  var r;\n  try {\n    r = exports.storage.debug;\n  } catch(e) {}\n  return r;\n}\n\n/**\n * Enable namespaces listed in `localStorage.debug` initially.\n */\n\nexports.enable(load());\n\n/**\n * Localstorage attempts to return the localstorage.\n *\n * This is necessary because safari throws\n * when a user disables cookies/localstorage\n * and you attempt to access it.\n *\n * @return {LocalStorage}\n * @api private\n */\n\nfunction localstorage(){\n  try {\n    return window.localStorage;\n  } catch (e) {}\n}\n",
     "\n/**\n * This is the common logic for both the Node.js and web browser\n * implementations of `debug()`.\n *\n * Expose `debug()` as the module.\n */\n\nexports = module.exports = debug;\nexports.coerce = coerce;\nexports.disable = disable;\nexports.enable = enable;\nexports.enabled = enabled;\nexports.humanize = require('ms');\n\n/**\n * The currently active debug mode names, and names to skip.\n */\n\nexports.names = [];\nexports.skips = [];\n\n/**\n * Map of special \"%n\" handling functions, for the debug \"format\" argument.\n *\n * Valid key names are a single, lowercased letter, i.e. \"n\".\n */\n\nexports.formatters = {};\n\n/**\n * Previously assigned color.\n */\n\nvar prevColor = 0;\n\n/**\n * Previous log timestamp.\n */\n\nvar prevTime;\n\n/**\n * Select a color.\n *\n * @return {Number}\n * @api private\n */\n\nfunction selectColor() {\n  return exports.colors[prevColor++ % exports.colors.length];\n}\n\n/**\n * Create a debugger with the given `namespace`.\n *\n * @param {String} namespace\n * @return {Function}\n * @api public\n */\n\nfunction debug(namespace) {\n\n  // define the `disabled` version\n  function disabled() {\n  }\n  disabled.enabled = false;\n\n  // define the `enabled` version\n  function enabled() {\n\n    var self = enabled;\n\n    // set `diff` timestamp\n    var curr = +new Date();\n    var ms = curr - (prevTime || curr);\n    self.diff = ms;\n    self.prev = prevTime;\n    self.curr = curr;\n    prevTime = curr;\n\n    // add the `color` if not set\n    if (null == self.useColors) self.useColors = exports.useColors();\n    if (null == self.color && self.useColors) self.color = selectColor();\n\n    var args = Array.prototype.slice.call(arguments);\n\n    args[0] = exports.coerce(args[0]);\n\n    if ('string' !== typeof args[0]) {\n      // anything else let's inspect with %o\n      args = ['%o'].concat(args);\n    }\n\n    // apply any `formatters` transformations\n    var index = 0;\n    args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {\n      // if we encounter an escaped % then don't increase the array index\n      if (match === '%%') return match;\n      index++;\n      var formatter = exports.formatters[format];\n      if ('function' === typeof formatter) {\n        var val = args[index];\n        match = formatter.call(self, val);\n\n        // now we need to remove `args[index]` since it's inlined in the `format`\n        args.splice(index, 1);\n        index--;\n      }\n      return match;\n    });\n\n    if ('function' === typeof exports.formatArgs) {\n      args = exports.formatArgs.apply(self, args);\n    }\n    var logFn = enabled.log || exports.log || console.log.bind(console);\n    logFn.apply(self, args);\n  }\n  enabled.enabled = true;\n\n  var fn = exports.enabled(namespace) ? enabled : disabled;\n\n  fn.namespace = namespace;\n\n  return fn;\n}\n\n/**\n * Enables a debug mode by namespaces. This can include modes\n * separated by a colon and wildcards.\n *\n * @param {String} namespaces\n * @api public\n */\n\nfunction enable(namespaces) {\n  exports.save(namespaces);\n\n  var split = (namespaces || '').split(/[\\s,]+/);\n  var len = split.length;\n\n  for (var i = 0; i < len; i++) {\n    if (!split[i]) continue; // ignore empty strings\n    namespaces = split[i].replace(/\\*/g, '.*?');\n    if (namespaces[0] === '-') {\n      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));\n    } else {\n      exports.names.push(new RegExp('^' + namespaces + '$'));\n    }\n  }\n}\n\n/**\n * Disable debug output.\n *\n * @api public\n */\n\nfunction disable() {\n  exports.enable('');\n}\n\n/**\n * Returns true if the given mode name is enabled, false otherwise.\n *\n * @param {String} name\n * @return {Boolean}\n * @api public\n */\n\nfunction enabled(name) {\n  var i, len;\n  for (i = 0, len = exports.skips.length; i < len; i++) {\n    if (exports.skips[i].test(name)) {\n      return false;\n    }\n  }\n  for (i = 0, len = exports.names.length; i < len; i++) {\n    if (exports.names[i].test(name)) {\n      return true;\n    }\n  }\n  return false;\n}\n\n/**\n * Coerce `val`.\n *\n * @param {Mixed} val\n * @return {Mixed}\n * @api private\n */\n\nfunction coerce(val) {\n  if (val instanceof Error) return val.stack || val.message;\n  return val;\n}\n",
     "/*!\n * @overview es6-promise - a tiny implementation of Promises/A+.\n * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)\n * @license   Licensed under MIT license\n *            See https://raw.githubusercontent.com/jakearchibald/es6-promise/master/LICENSE\n * @version   3.0.2\n */\n\n(function() {\n    \"use strict\";\n    function lib$es6$promise$utils$$objectOrFunction(x) {\n      return typeof x === 'function' || (typeof x === 'object' && x !== null);\n    }\n\n    function lib$es6$promise$utils$$isFunction(x) {\n      return typeof x === 'function';\n    }\n\n    function lib$es6$promise$utils$$isMaybeThenable(x) {\n      return typeof x === 'object' && x !== null;\n    }\n\n    var lib$es6$promise$utils$$_isArray;\n    if (!Array.isArray) {\n      lib$es6$promise$utils$$_isArray = function (x) {\n        return Object.prototype.toString.call(x) === '[object Array]';\n      };\n    } else {\n      lib$es6$promise$utils$$_isArray = Array.isArray;\n    }\n\n    var lib$es6$promise$utils$$isArray = lib$es6$promise$utils$$_isArray;\n    var lib$es6$promise$asap$$len = 0;\n    var lib$es6$promise$asap$$toString = {}.toString;\n    var lib$es6$promise$asap$$vertxNext;\n    var lib$es6$promise$asap$$customSchedulerFn;\n\n    var lib$es6$promise$asap$$asap = function asap(callback, arg) {\n      lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len] = callback;\n      lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len + 1] = arg;\n      lib$es6$promise$asap$$len += 2;\n      if (lib$es6$promise$asap$$len === 2) {\n        // If len is 2, that means that we need to schedule an async flush.\n        // If additional callbacks are queued before the queue is flushed, they\n        // will be processed by this flush that we are scheduling.\n        if (lib$es6$promise$asap$$customSchedulerFn) {\n          lib$es6$promise$asap$$customSchedulerFn(lib$es6$promise$asap$$flush);\n        } else {\n          lib$es6$promise$asap$$scheduleFlush();\n        }\n      }\n    }\n\n    function lib$es6$promise$asap$$setScheduler(scheduleFn) {\n      lib$es6$promise$asap$$customSchedulerFn = scheduleFn;\n    }\n\n    function lib$es6$promise$asap$$setAsap(asapFn) {\n      lib$es6$promise$asap$$asap = asapFn;\n    }\n\n    var lib$es6$promise$asap$$browserWindow = (typeof window !== 'undefined') ? window : undefined;\n    var lib$es6$promise$asap$$browserGlobal = lib$es6$promise$asap$$browserWindow || {};\n    var lib$es6$promise$asap$$BrowserMutationObserver = lib$es6$promise$asap$$browserGlobal.MutationObserver || lib$es6$promise$asap$$browserGlobal.WebKitMutationObserver;\n    var lib$es6$promise$asap$$isNode = typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';\n\n    // test for web worker but not in IE10\n    var lib$es6$promise$asap$$isWorker = typeof Uint8ClampedArray !== 'undefined' &&\n      typeof importScripts !== 'undefined' &&\n      typeof MessageChannel !== 'undefined';\n\n    // node\n    function lib$es6$promise$asap$$useNextTick() {\n      // node version 0.10.x displays a deprecation warning when nextTick is used recursively\n      // see https://github.com/cujojs/when/issues/410 for details\n      return function() {\n        process.nextTick(lib$es6$promise$asap$$flush);\n      };\n    }\n\n    // vertx\n    function lib$es6$promise$asap$$useVertxTimer() {\n      return function() {\n        lib$es6$promise$asap$$vertxNext(lib$es6$promise$asap$$flush);\n      };\n    }\n\n    function lib$es6$promise$asap$$useMutationObserver() {\n      var iterations = 0;\n      var observer = new lib$es6$promise$asap$$BrowserMutationObserver(lib$es6$promise$asap$$flush);\n      var node = document.createTextNode('');\n      observer.observe(node, { characterData: true });\n\n      return function() {\n        node.data = (iterations = ++iterations % 2);\n      };\n    }\n\n    // web worker\n    function lib$es6$promise$asap$$useMessageChannel() {\n      var channel = new MessageChannel();\n      channel.port1.onmessage = lib$es6$promise$asap$$flush;\n      return function () {\n        channel.port2.postMessage(0);\n      };\n    }\n\n    function lib$es6$promise$asap$$useSetTimeout() {\n      return function() {\n        setTimeout(lib$es6$promise$asap$$flush, 1);\n      };\n    }\n\n    var lib$es6$promise$asap$$queue = new Array(1000);\n    function lib$es6$promise$asap$$flush() {\n      for (var i = 0; i < lib$es6$promise$asap$$len; i+=2) {\n        var callback = lib$es6$promise$asap$$queue[i];\n        var arg = lib$es6$promise$asap$$queue[i+1];\n\n        callback(arg);\n\n        lib$es6$promise$asap$$queue[i] = undefined;\n        lib$es6$promise$asap$$queue[i+1] = undefined;\n      }\n\n      lib$es6$promise$asap$$len = 0;\n    }\n\n    function lib$es6$promise$asap$$attemptVertx() {\n      try {\n        var r = require;\n        var vertx = r('vertx');\n        lib$es6$promise$asap$$vertxNext = vertx.runOnLoop || vertx.runOnContext;\n        return lib$es6$promise$asap$$useVertxTimer();\n      } catch(e) {\n        return lib$es6$promise$asap$$useSetTimeout();\n      }\n    }\n\n    var lib$es6$promise$asap$$scheduleFlush;\n    // Decide what async method to use to triggering processing of queued callbacks:\n    if (lib$es6$promise$asap$$isNode) {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useNextTick();\n    } else if (lib$es6$promise$asap$$BrowserMutationObserver) {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useMutationObserver();\n    } else if (lib$es6$promise$asap$$isWorker) {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useMessageChannel();\n    } else if (lib$es6$promise$asap$$browserWindow === undefined && typeof require === 'function') {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$attemptVertx();\n    } else {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useSetTimeout();\n    }\n\n    function lib$es6$promise$$internal$$noop() {}\n\n    var lib$es6$promise$$internal$$PENDING   = void 0;\n    var lib$es6$promise$$internal$$FULFILLED = 1;\n    var lib$es6$promise$$internal$$REJECTED  = 2;\n\n    var lib$es6$promise$$internal$$GET_THEN_ERROR = new lib$es6$promise$$internal$$ErrorObject();\n\n    function lib$es6$promise$$internal$$selfFulfillment() {\n      return new TypeError(\"You cannot resolve a promise with itself\");\n    }\n\n    function lib$es6$promise$$internal$$cannotReturnOwn() {\n      return new TypeError('A promises callback cannot return that same promise.');\n    }\n\n    function lib$es6$promise$$internal$$getThen(promise) {\n      try {\n        return promise.then;\n      } catch(error) {\n        lib$es6$promise$$internal$$GET_THEN_ERROR.error = error;\n        return lib$es6$promise$$internal$$GET_THEN_ERROR;\n      }\n    }\n\n    function lib$es6$promise$$internal$$tryThen(then, value, fulfillmentHandler, rejectionHandler) {\n      try {\n        then.call(value, fulfillmentHandler, rejectionHandler);\n      } catch(e) {\n        return e;\n      }\n    }\n\n    function lib$es6$promise$$internal$$handleForeignThenable(promise, thenable, then) {\n       lib$es6$promise$asap$$asap(function(promise) {\n        var sealed = false;\n        var error = lib$es6$promise$$internal$$tryThen(then, thenable, function(value) {\n          if (sealed) { return; }\n          sealed = true;\n          if (thenable !== value) {\n            lib$es6$promise$$internal$$resolve(promise, value);\n          } else {\n            lib$es6$promise$$internal$$fulfill(promise, value);\n          }\n        }, function(reason) {\n          if (sealed) { return; }\n          sealed = true;\n\n          lib$es6$promise$$internal$$reject(promise, reason);\n        }, 'Settle: ' + (promise._label || ' unknown promise'));\n\n        if (!sealed && error) {\n          sealed = true;\n          lib$es6$promise$$internal$$reject(promise, error);\n        }\n      }, promise);\n    }\n\n    function lib$es6$promise$$internal$$handleOwnThenable(promise, thenable) {\n      if (thenable._state === lib$es6$promise$$internal$$FULFILLED) {\n        lib$es6$promise$$internal$$fulfill(promise, thenable._result);\n      } else if (thenable._state === lib$es6$promise$$internal$$REJECTED) {\n        lib$es6$promise$$internal$$reject(promise, thenable._result);\n      } else {\n        lib$es6$promise$$internal$$subscribe(thenable, undefined, function(value) {\n          lib$es6$promise$$internal$$resolve(promise, value);\n        }, function(reason) {\n          lib$es6$promise$$internal$$reject(promise, reason);\n        });\n      }\n    }\n\n    function lib$es6$promise$$internal$$handleMaybeThenable(promise, maybeThenable) {\n      if (maybeThenable.constructor === promise.constructor) {\n        lib$es6$promise$$internal$$handleOwnThenable(promise, maybeThenable);\n      } else {\n        var then = lib$es6$promise$$internal$$getThen(maybeThenable);\n\n        if (then === lib$es6$promise$$internal$$GET_THEN_ERROR) {\n          lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$GET_THEN_ERROR.error);\n        } else if (then === undefined) {\n          lib$es6$promise$$internal$$fulfill(promise, maybeThenable);\n        } else if (lib$es6$promise$utils$$isFunction(then)) {\n          lib$es6$promise$$internal$$handleForeignThenable(promise, maybeThenable, then);\n        } else {\n          lib$es6$promise$$internal$$fulfill(promise, maybeThenable);\n        }\n      }\n    }\n\n    function lib$es6$promise$$internal$$resolve(promise, value) {\n      if (promise === value) {\n        lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$selfFulfillment());\n      } else if (lib$es6$promise$utils$$objectOrFunction(value)) {\n        lib$es6$promise$$internal$$handleMaybeThenable(promise, value);\n      } else {\n        lib$es6$promise$$internal$$fulfill(promise, value);\n      }\n    }\n\n    function lib$es6$promise$$internal$$publishRejection(promise) {\n      if (promise._onerror) {\n        promise._onerror(promise._result);\n      }\n\n      lib$es6$promise$$internal$$publish(promise);\n    }\n\n    function lib$es6$promise$$internal$$fulfill(promise, value) {\n      if (promise._state !== lib$es6$promise$$internal$$PENDING) { return; }\n\n      promise._result = value;\n      promise._state = lib$es6$promise$$internal$$FULFILLED;\n\n      if (promise._subscribers.length !== 0) {\n        lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish, promise);\n      }\n    }\n\n    function lib$es6$promise$$internal$$reject(promise, reason) {\n      if (promise._state !== lib$es6$promise$$internal$$PENDING) { return; }\n      promise._state = lib$es6$promise$$internal$$REJECTED;\n      promise._result = reason;\n\n      lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publishRejection, promise);\n    }\n\n    function lib$es6$promise$$internal$$subscribe(parent, child, onFulfillment, onRejection) {\n      var subscribers = parent._subscribers;\n      var length = subscribers.length;\n\n      parent._onerror = null;\n\n      subscribers[length] = child;\n      subscribers[length + lib$es6$promise$$internal$$FULFILLED] = onFulfillment;\n      subscribers[length + lib$es6$promise$$internal$$REJECTED]  = onRejection;\n\n      if (length === 0 && parent._state) {\n        lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish, parent);\n      }\n    }\n\n    function lib$es6$promise$$internal$$publish(promise) {\n      var subscribers = promise._subscribers;\n      var settled = promise._state;\n\n      if (subscribers.length === 0) { return; }\n\n      var child, callback, detail = promise._result;\n\n      for (var i = 0; i < subscribers.length; i += 3) {\n        child = subscribers[i];\n        callback = subscribers[i + settled];\n\n        if (child) {\n          lib$es6$promise$$internal$$invokeCallback(settled, child, callback, detail);\n        } else {\n          callback(detail);\n        }\n      }\n\n      promise._subscribers.length = 0;\n    }\n\n    function lib$es6$promise$$internal$$ErrorObject() {\n      this.error = null;\n    }\n\n    var lib$es6$promise$$internal$$TRY_CATCH_ERROR = new lib$es6$promise$$internal$$ErrorObject();\n\n    function lib$es6$promise$$internal$$tryCatch(callback, detail) {\n      try {\n        return callback(detail);\n      } catch(e) {\n        lib$es6$promise$$internal$$TRY_CATCH_ERROR.error = e;\n        return lib$es6$promise$$internal$$TRY_CATCH_ERROR;\n      }\n    }\n\n    function lib$es6$promise$$internal$$invokeCallback(settled, promise, callback, detail) {\n      var hasCallback = lib$es6$promise$utils$$isFunction(callback),\n          value, error, succeeded, failed;\n\n      if (hasCallback) {\n        value = lib$es6$promise$$internal$$tryCatch(callback, detail);\n\n        if (value === lib$es6$promise$$internal$$TRY_CATCH_ERROR) {\n          failed = true;\n          error = value.error;\n          value = null;\n        } else {\n          succeeded = true;\n        }\n\n        if (promise === value) {\n          lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$cannotReturnOwn());\n          return;\n        }\n\n      } else {\n        value = detail;\n        succeeded = true;\n      }\n\n      if (promise._state !== lib$es6$promise$$internal$$PENDING) {\n        // noop\n      } else if (hasCallback && succeeded) {\n        lib$es6$promise$$internal$$resolve(promise, value);\n      } else if (failed) {\n        lib$es6$promise$$internal$$reject(promise, error);\n      } else if (settled === lib$es6$promise$$internal$$FULFILLED) {\n        lib$es6$promise$$internal$$fulfill(promise, value);\n      } else if (settled === lib$es6$promise$$internal$$REJECTED) {\n        lib$es6$promise$$internal$$reject(promise, value);\n      }\n    }\n\n    function lib$es6$promise$$internal$$initializePromise(promise, resolver) {\n      try {\n        resolver(function resolvePromise(value){\n          lib$es6$promise$$internal$$resolve(promise, value);\n        }, function rejectPromise(reason) {\n          lib$es6$promise$$internal$$reject(promise, reason);\n        });\n      } catch(e) {\n        lib$es6$promise$$internal$$reject(promise, e);\n      }\n    }\n\n    function lib$es6$promise$enumerator$$Enumerator(Constructor, input) {\n      var enumerator = this;\n\n      enumerator._instanceConstructor = Constructor;\n      enumerator.promise = new Constructor(lib$es6$promise$$internal$$noop);\n\n      if (enumerator._validateInput(input)) {\n        enumerator._input     = input;\n        enumerator.length     = input.length;\n        enumerator._remaining = input.length;\n\n        enumerator._init();\n\n        if (enumerator.length === 0) {\n          lib$es6$promise$$internal$$fulfill(enumerator.promise, enumerator._result);\n        } else {\n          enumerator.length = enumerator.length || 0;\n          enumerator._enumerate();\n          if (enumerator._remaining === 0) {\n            lib$es6$promise$$internal$$fulfill(enumerator.promise, enumerator._result);\n          }\n        }\n      } else {\n        lib$es6$promise$$internal$$reject(enumerator.promise, enumerator._validationError());\n      }\n    }\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._validateInput = function(input) {\n      return lib$es6$promise$utils$$isArray(input);\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._validationError = function() {\n      return new Error('Array Methods must be provided an Array');\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._init = function() {\n      this._result = new Array(this.length);\n    };\n\n    var lib$es6$promise$enumerator$$default = lib$es6$promise$enumerator$$Enumerator;\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._enumerate = function() {\n      var enumerator = this;\n\n      var length  = enumerator.length;\n      var promise = enumerator.promise;\n      var input   = enumerator._input;\n\n      for (var i = 0; promise._state === lib$es6$promise$$internal$$PENDING && i < length; i++) {\n        enumerator._eachEntry(input[i], i);\n      }\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._eachEntry = function(entry, i) {\n      var enumerator = this;\n      var c = enumerator._instanceConstructor;\n\n      if (lib$es6$promise$utils$$isMaybeThenable(entry)) {\n        if (entry.constructor === c && entry._state !== lib$es6$promise$$internal$$PENDING) {\n          entry._onerror = null;\n          enumerator._settledAt(entry._state, i, entry._result);\n        } else {\n          enumerator._willSettleAt(c.resolve(entry), i);\n        }\n      } else {\n        enumerator._remaining--;\n        enumerator._result[i] = entry;\n      }\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._settledAt = function(state, i, value) {\n      var enumerator = this;\n      var promise = enumerator.promise;\n\n      if (promise._state === lib$es6$promise$$internal$$PENDING) {\n        enumerator._remaining--;\n\n        if (state === lib$es6$promise$$internal$$REJECTED) {\n          lib$es6$promise$$internal$$reject(promise, value);\n        } else {\n          enumerator._result[i] = value;\n        }\n      }\n\n      if (enumerator._remaining === 0) {\n        lib$es6$promise$$internal$$fulfill(promise, enumerator._result);\n      }\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._willSettleAt = function(promise, i) {\n      var enumerator = this;\n\n      lib$es6$promise$$internal$$subscribe(promise, undefined, function(value) {\n        enumerator._settledAt(lib$es6$promise$$internal$$FULFILLED, i, value);\n      }, function(reason) {\n        enumerator._settledAt(lib$es6$promise$$internal$$REJECTED, i, reason);\n      });\n    };\n    function lib$es6$promise$promise$all$$all(entries) {\n      return new lib$es6$promise$enumerator$$default(this, entries).promise;\n    }\n    var lib$es6$promise$promise$all$$default = lib$es6$promise$promise$all$$all;\n    function lib$es6$promise$promise$race$$race(entries) {\n      /*jshint validthis:true */\n      var Constructor = this;\n\n      var promise = new Constructor(lib$es6$promise$$internal$$noop);\n\n      if (!lib$es6$promise$utils$$isArray(entries)) {\n        lib$es6$promise$$internal$$reject(promise, new TypeError('You must pass an array to race.'));\n        return promise;\n      }\n\n      var length = entries.length;\n\n      function onFulfillment(value) {\n        lib$es6$promise$$internal$$resolve(promise, value);\n      }\n\n      function onRejection(reason) {\n        lib$es6$promise$$internal$$reject(promise, reason);\n      }\n\n      for (var i = 0; promise._state === lib$es6$promise$$internal$$PENDING && i < length; i++) {\n        lib$es6$promise$$internal$$subscribe(Constructor.resolve(entries[i]), undefined, onFulfillment, onRejection);\n      }\n\n      return promise;\n    }\n    var lib$es6$promise$promise$race$$default = lib$es6$promise$promise$race$$race;\n    function lib$es6$promise$promise$resolve$$resolve(object) {\n      /*jshint validthis:true */\n      var Constructor = this;\n\n      if (object && typeof object === 'object' && object.constructor === Constructor) {\n        return object;\n      }\n\n      var promise = new Constructor(lib$es6$promise$$internal$$noop);\n      lib$es6$promise$$internal$$resolve(promise, object);\n      return promise;\n    }\n    var lib$es6$promise$promise$resolve$$default = lib$es6$promise$promise$resolve$$resolve;\n    function lib$es6$promise$promise$reject$$reject(reason) {\n      /*jshint validthis:true */\n      var Constructor = this;\n      var promise = new Constructor(lib$es6$promise$$internal$$noop);\n      lib$es6$promise$$internal$$reject(promise, reason);\n      return promise;\n    }\n    var lib$es6$promise$promise$reject$$default = lib$es6$promise$promise$reject$$reject;\n\n    var lib$es6$promise$promise$$counter = 0;\n\n    function lib$es6$promise$promise$$needsResolver() {\n      throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');\n    }\n\n    function lib$es6$promise$promise$$needsNew() {\n      throw new TypeError(\"Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.\");\n    }\n\n    var lib$es6$promise$promise$$default = lib$es6$promise$promise$$Promise;\n    /**\n      Promise objects represent the eventual result of an asynchronous operation. The\n      primary way of interacting with a promise is through its `then` method, which\n      registers callbacks to receive either a promise's eventual value or the reason\n      why the promise cannot be fulfilled.\n\n      Terminology\n      -----------\n\n      - `promise` is an object or function with a `then` method whose behavior conforms to this specification.\n      - `thenable` is an object or function that defines a `then` method.\n      - `value` is any legal JavaScript value (including undefined, a thenable, or a promise).\n      - `exception` is a value that is thrown using the throw statement.\n      - `reason` is a value that indicates why a promise was rejected.\n      - `settled` the final resting state of a promise, fulfilled or rejected.\n\n      A promise can be in one of three states: pending, fulfilled, or rejected.\n\n      Promises that are fulfilled have a fulfillment value and are in the fulfilled\n      state.  Promises that are rejected have a rejection reason and are in the\n      rejected state.  A fulfillment value is never a thenable.\n\n      Promises can also be said to *resolve* a value.  If this value is also a\n      promise, then the original promise's settled state will match the value's\n      settled state.  So a promise that *resolves* a promise that rejects will\n      itself reject, and a promise that *resolves* a promise that fulfills will\n      itself fulfill.\n\n\n      Basic Usage:\n      ------------\n\n      ```js\n      var promise = new Promise(function(resolve, reject) {\n        // on success\n        resolve(value);\n\n        // on failure\n        reject(reason);\n      });\n\n      promise.then(function(value) {\n        // on fulfillment\n      }, function(reason) {\n        // on rejection\n      });\n      ```\n\n      Advanced Usage:\n      ---------------\n\n      Promises shine when abstracting away asynchronous interactions such as\n      `XMLHttpRequest`s.\n\n      ```js\n      function getJSON(url) {\n        return new Promise(function(resolve, reject){\n          var xhr = new XMLHttpRequest();\n\n          xhr.open('GET', url);\n          xhr.onreadystatechange = handler;\n          xhr.responseType = 'json';\n          xhr.setRequestHeader('Accept', 'application/json');\n          xhr.send();\n\n          function handler() {\n            if (this.readyState === this.DONE) {\n              if (this.status === 200) {\n                resolve(this.response);\n              } else {\n                reject(new Error('getJSON: `' + url + '` failed with status: [' + this.status + ']'));\n              }\n            }\n          };\n        });\n      }\n\n      getJSON('/posts.json').then(function(json) {\n        // on fulfillment\n      }, function(reason) {\n        // on rejection\n      });\n      ```\n\n      Unlike callbacks, promises are great composable primitives.\n\n      ```js\n      Promise.all([\n        getJSON('/posts'),\n        getJSON('/comments')\n      ]).then(function(values){\n        values[0] // => postsJSON\n        values[1] // => commentsJSON\n\n        return values;\n      });\n      ```\n\n      @class Promise\n      @param {function} resolver\n      Useful for tooling.\n      @constructor\n    */\n    function lib$es6$promise$promise$$Promise(resolver) {\n      this._id = lib$es6$promise$promise$$counter++;\n      this._state = undefined;\n      this._result = undefined;\n      this._subscribers = [];\n\n      if (lib$es6$promise$$internal$$noop !== resolver) {\n        if (!lib$es6$promise$utils$$isFunction(resolver)) {\n          lib$es6$promise$promise$$needsResolver();\n        }\n\n        if (!(this instanceof lib$es6$promise$promise$$Promise)) {\n          lib$es6$promise$promise$$needsNew();\n        }\n\n        lib$es6$promise$$internal$$initializePromise(this, resolver);\n      }\n    }\n\n    lib$es6$promise$promise$$Promise.all = lib$es6$promise$promise$all$$default;\n    lib$es6$promise$promise$$Promise.race = lib$es6$promise$promise$race$$default;\n    lib$es6$promise$promise$$Promise.resolve = lib$es6$promise$promise$resolve$$default;\n    lib$es6$promise$promise$$Promise.reject = lib$es6$promise$promise$reject$$default;\n    lib$es6$promise$promise$$Promise._setScheduler = lib$es6$promise$asap$$setScheduler;\n    lib$es6$promise$promise$$Promise._setAsap = lib$es6$promise$asap$$setAsap;\n    lib$es6$promise$promise$$Promise._asap = lib$es6$promise$asap$$asap;\n\n    lib$es6$promise$promise$$Promise.prototype = {\n      constructor: lib$es6$promise$promise$$Promise,\n\n    /**\n      The primary way of interacting with a promise is through its `then` method,\n      which registers callbacks to receive either a promise's eventual value or the\n      reason why the promise cannot be fulfilled.\n\n      ```js\n      findUser().then(function(user){\n        // user is available\n      }, function(reason){\n        // user is unavailable, and you are given the reason why\n      });\n      ```\n\n      Chaining\n      --------\n\n      The return value of `then` is itself a promise.  This second, 'downstream'\n      promise is resolved with the return value of the first promise's fulfillment\n      or rejection handler, or rejected if the handler throws an exception.\n\n      ```js\n      findUser().then(function (user) {\n        return user.name;\n      }, function (reason) {\n        return 'default name';\n      }).then(function (userName) {\n        // If `findUser` fulfilled, `userName` will be the user's name, otherwise it\n        // will be `'default name'`\n      });\n\n      findUser().then(function (user) {\n        throw new Error('Found user, but still unhappy');\n      }, function (reason) {\n        throw new Error('`findUser` rejected and we're unhappy');\n      }).then(function (value) {\n        // never reached\n      }, function (reason) {\n        // if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.\n        // If `findUser` rejected, `reason` will be '`findUser` rejected and we're unhappy'.\n      });\n      ```\n      If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.\n\n      ```js\n      findUser().then(function (user) {\n        throw new PedagogicalException('Upstream error');\n      }).then(function (value) {\n        // never reached\n      }).then(function (value) {\n        // never reached\n      }, function (reason) {\n        // The `PedgagocialException` is propagated all the way down to here\n      });\n      ```\n\n      Assimilation\n      ------------\n\n      Sometimes the value you want to propagate to a downstream promise can only be\n      retrieved asynchronously. This can be achieved by returning a promise in the\n      fulfillment or rejection handler. The downstream promise will then be pending\n      until the returned promise is settled. This is called *assimilation*.\n\n      ```js\n      findUser().then(function (user) {\n        return findCommentsByAuthor(user);\n      }).then(function (comments) {\n        // The user's comments are now available\n      });\n      ```\n\n      If the assimliated promise rejects, then the downstream promise will also reject.\n\n      ```js\n      findUser().then(function (user) {\n        return findCommentsByAuthor(user);\n      }).then(function (comments) {\n        // If `findCommentsByAuthor` fulfills, we'll have the value here\n      }, function (reason) {\n        // If `findCommentsByAuthor` rejects, we'll have the reason here\n      });\n      ```\n\n      Simple Example\n      --------------\n\n      Synchronous Example\n\n      ```javascript\n      var result;\n\n      try {\n        result = findResult();\n        // success\n      } catch(reason) {\n        // failure\n      }\n      ```\n\n      Errback Example\n\n      ```js\n      findResult(function(result, err){\n        if (err) {\n          // failure\n        } else {\n          // success\n        }\n      });\n      ```\n\n      Promise Example;\n\n      ```javascript\n      findResult().then(function(result){\n        // success\n      }, function(reason){\n        // failure\n      });\n      ```\n\n      Advanced Example\n      --------------\n\n      Synchronous Example\n\n      ```javascript\n      var author, books;\n\n      try {\n        author = findAuthor();\n        books  = findBooksByAuthor(author);\n        // success\n      } catch(reason) {\n        // failure\n      }\n      ```\n\n      Errback Example\n\n      ```js\n\n      function foundBooks(books) {\n\n      }\n\n      function failure(reason) {\n\n      }\n\n      findAuthor(function(author, err){\n        if (err) {\n          failure(err);\n          // failure\n        } else {\n          try {\n            findBoooksByAuthor(author, function(books, err) {\n              if (err) {\n                failure(err);\n              } else {\n                try {\n                  foundBooks(books);\n                } catch(reason) {\n                  failure(reason);\n                }\n              }\n            });\n          } catch(error) {\n            failure(err);\n          }\n          // success\n        }\n      });\n      ```\n\n      Promise Example;\n\n      ```javascript\n      findAuthor().\n        then(findBooksByAuthor).\n        then(function(books){\n          // found books\n      }).catch(function(reason){\n        // something went wrong\n      });\n      ```\n\n      @method then\n      @param {Function} onFulfilled\n      @param {Function} onRejected\n      Useful for tooling.\n      @return {Promise}\n    */\n      then: function(onFulfillment, onRejection) {\n        var parent = this;\n        var state = parent._state;\n\n        if (state === lib$es6$promise$$internal$$FULFILLED && !onFulfillment || state === lib$es6$promise$$internal$$REJECTED && !onRejection) {\n          return this;\n        }\n\n        var child = new this.constructor(lib$es6$promise$$internal$$noop);\n        var result = parent._result;\n\n        if (state) {\n          var callback = arguments[state - 1];\n          lib$es6$promise$asap$$asap(function(){\n            lib$es6$promise$$internal$$invokeCallback(state, child, callback, result);\n          });\n        } else {\n          lib$es6$promise$$internal$$subscribe(parent, child, onFulfillment, onRejection);\n        }\n\n        return child;\n      },\n\n    /**\n      `catch` is simply sugar for `then(undefined, onRejection)` which makes it the same\n      as the catch block of a try/catch statement.\n\n      ```js\n      function findAuthor(){\n        throw new Error('couldn't find that author');\n      }\n\n      // synchronous\n      try {\n        findAuthor();\n      } catch(reason) {\n        // something went wrong\n      }\n\n      // async with promises\n      findAuthor().catch(function(reason){\n        // something went wrong\n      });\n      ```\n\n      @method catch\n      @param {Function} onRejection\n      Useful for tooling.\n      @return {Promise}\n    */\n      'catch': function(onRejection) {\n        return this.then(null, onRejection);\n      }\n    };\n    function lib$es6$promise$polyfill$$polyfill() {\n      var local;\n\n      if (typeof global !== 'undefined') {\n          local = global;\n      } else if (typeof self !== 'undefined') {\n          local = self;\n      } else {\n          try {\n              local = Function('return this')();\n          } catch (e) {\n              throw new Error('polyfill failed because global object is unavailable in this environment');\n          }\n      }\n\n      var P = local.Promise;\n\n      if (P && Object.prototype.toString.call(P.resolve()) === '[object Promise]' && !P.cast) {\n        return;\n      }\n\n      local.Promise = lib$es6$promise$promise$$default;\n    }\n    var lib$es6$promise$polyfill$$default = lib$es6$promise$polyfill$$polyfill;\n\n    var lib$es6$promise$umd$$ES6Promise = {\n      'Promise': lib$es6$promise$promise$$default,\n      'polyfill': lib$es6$promise$polyfill$$default\n    };\n\n    /* global define:true module:true window: true */\n    if (typeof define === 'function' && define['amd']) {\n      define(function() { return lib$es6$promise$umd$$ES6Promise; });\n    } else if (typeof module !== 'undefined' && module['exports']) {\n      module['exports'] = lib$es6$promise$umd$$ES6Promise;\n    } else if (typeof this !== 'undefined') {\n      this['ES6Promise'] = lib$es6$promise$umd$$ES6Promise;\n    }\n\n    lib$es6$promise$polyfill$$default();\n}).call(this);\n\n",
-    "/*\n  Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.\n\n  Redistribution and use in source and binary forms, with or without\n  modification, are permitted provided that the following conditions are met:\n\n    * Redistributions of source code must retain the above copyright\n      notice, this list of conditions and the following disclaimer.\n    * Redistributions in binary form must reproduce the above copyright\n      notice, this list of conditions and the following disclaimer in the\n      documentation and/or other materials provided with the distribution.\n\n  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY\n  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\n  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\n  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n*/\n\n(function (root, factory) {\n    'use strict';\n\n    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,\n    // Rhino, and plain browser loading.\n\n    /* istanbul ignore next */\n    if (typeof define === 'function' && define.amd) {\n        define(['exports'], factory);\n    } else if (typeof exports !== 'undefined') {\n        factory(exports);\n    } else {\n        factory((root.esprima = {}));\n    }\n}(this, function (exports) {\n    'use strict';\n\n    var Token,\n        TokenName,\n        FnExprTokens,\n        Syntax,\n        PlaceHolders,\n        Messages,\n        Regex,\n        source,\n        strict,\n        index,\n        lineNumber,\n        lineStart,\n        hasLineTerminator,\n        lastIndex,\n        lastLineNumber,\n        lastLineStart,\n        startIndex,\n        startLineNumber,\n        startLineStart,\n        scanning,\n        length,\n        lookahead,\n        state,\n        extra,\n        isBindingElement,\n        isAssignmentTarget,\n        firstCoverInitializedNameError;\n\n    Token = {\n        BooleanLiteral: 1,\n        EOF: 2,\n        Identifier: 3,\n        Keyword: 4,\n        NullLiteral: 5,\n        NumericLiteral: 6,\n        Punctuator: 7,\n        StringLiteral: 8,\n        RegularExpression: 9,\n        Template: 10\n    };\n\n    TokenName = {};\n    TokenName[Token.BooleanLiteral] = 'Boolean';\n    TokenName[Token.EOF] = '<end>';\n    TokenName[Token.Identifier] = 'Identifier';\n    TokenName[Token.Keyword] = 'Keyword';\n    TokenName[Token.NullLiteral] = 'Null';\n    TokenName[Token.NumericLiteral] = 'Numeric';\n    TokenName[Token.Punctuator] = 'Punctuator';\n    TokenName[Token.StringLiteral] = 'String';\n    TokenName[Token.RegularExpression] = 'RegularExpression';\n    TokenName[Token.Template] = 'Template';\n\n    // A function following one of those tokens is an expression.\n    FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',\n                    'return', 'case', 'delete', 'throw', 'void',\n                    // assignment operators\n                    '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=',\n                    '&=', '|=', '^=', ',',\n                    // binary/unary operators\n                    '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&',\n                    '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',\n                    '<=', '<', '>', '!=', '!=='];\n\n    Syntax = {\n        AssignmentExpression: 'AssignmentExpression',\n        AssignmentPattern: 'AssignmentPattern',\n        ArrayExpression: 'ArrayExpression',\n        ArrayPattern: 'ArrayPattern',\n        ArrowFunctionExpression: 'ArrowFunctionExpression',\n        BlockStatement: 'BlockStatement',\n        BinaryExpression: 'BinaryExpression',\n        BreakStatement: 'BreakStatement',\n        CallExpression: 'CallExpression',\n        CatchClause: 'CatchClause',\n        ClassBody: 'ClassBody',\n        ClassDeclaration: 'ClassDeclaration',\n        ClassExpression: 'ClassExpression',\n        ConditionalExpression: 'ConditionalExpression',\n        ContinueStatement: 'ContinueStatement',\n        DoWhileStatement: 'DoWhileStatement',\n        DebuggerStatement: 'DebuggerStatement',\n        EmptyStatement: 'EmptyStatement',\n        ExportAllDeclaration: 'ExportAllDeclaration',\n        ExportDefaultDeclaration: 'ExportDefaultDeclaration',\n        ExportNamedDeclaration: 'ExportNamedDeclaration',\n        ExportSpecifier: 'ExportSpecifier',\n        ExpressionStatement: 'ExpressionStatement',\n        ForStatement: 'ForStatement',\n        ForOfStatement: 'ForOfStatement',\n        ForInStatement: 'ForInStatement',\n        FunctionDeclaration: 'FunctionDeclaration',\n        FunctionExpression: 'FunctionExpression',\n        Identifier: 'Identifier',\n        IfStatement: 'IfStatement',\n        ImportDeclaration: 'ImportDeclaration',\n        ImportDefaultSpecifier: 'ImportDefaultSpecifier',\n        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',\n        ImportSpecifier: 'ImportSpecifier',\n        Literal: 'Literal',\n        LabeledStatement: 'LabeledStatement',\n        LogicalExpression: 'LogicalExpression',\n        MemberExpression: 'MemberExpression',\n        MetaProperty: 'MetaProperty',\n        MethodDefinition: 'MethodDefinition',\n        NewExpression: 'NewExpression',\n        ObjectExpression: 'ObjectExpression',\n        ObjectPattern: 'ObjectPattern',\n        Program: 'Program',\n        Property: 'Property',\n        RestElement: 'RestElement',\n        ReturnStatement: 'ReturnStatement',\n        SequenceExpression: 'SequenceExpression',\n        SpreadElement: 'SpreadElement',\n        Super: 'Super',\n        SwitchCase: 'SwitchCase',\n        SwitchStatement: 'SwitchStatement',\n        TaggedTemplateExpression: 'TaggedTemplateExpression',\n        TemplateElement: 'TemplateElement',\n        TemplateLiteral: 'TemplateLiteral',\n        ThisExpression: 'ThisExpression',\n        ThrowStatement: 'ThrowStatement',\n        TryStatement: 'TryStatement',\n        UnaryExpression: 'UnaryExpression',\n        UpdateExpression: 'UpdateExpression',\n        VariableDeclaration: 'VariableDeclaration',\n        VariableDeclarator: 'VariableDeclarator',\n        WhileStatement: 'WhileStatement',\n        WithStatement: 'WithStatement',\n        YieldExpression: 'YieldExpression'\n    };\n\n    PlaceHolders = {\n        ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder'\n    };\n\n    // Error messages should be identical to V8.\n    Messages = {\n        UnexpectedToken: 'Unexpected token %0',\n        UnexpectedNumber: 'Unexpected number',\n        UnexpectedString: 'Unexpected string',\n        UnexpectedIdentifier: 'Unexpected identifier',\n        UnexpectedReserved: 'Unexpected reserved word',\n        UnexpectedTemplate: 'Unexpected quasi %0',\n        UnexpectedEOS: 'Unexpected end of input',\n        NewlineAfterThrow: 'Illegal newline after throw',\n        InvalidRegExp: 'Invalid regular expression',\n        UnterminatedRegExp: 'Invalid regular expression: missing /',\n        InvalidLHSInAssignment: 'Invalid left-hand side in assignment',\n        InvalidLHSInForIn: 'Invalid left-hand side in for-in',\n        InvalidLHSInForLoop: 'Invalid left-hand side in for-loop',\n        MultipleDefaultsInSwitch: 'More than one default clause in switch statement',\n        NoCatchOrFinally: 'Missing catch or finally after try',\n        UnknownLabel: 'Undefined label \\'%0\\'',\n        Redeclaration: '%0 \\'%1\\' has already been declared',\n        IllegalContinue: 'Illegal continue statement',\n        IllegalBreak: 'Illegal break statement',\n        IllegalReturn: 'Illegal return statement',\n        StrictModeWith: 'Strict mode code may not include a with statement',\n        StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode',\n        StrictVarName: 'Variable name may not be eval or arguments in strict mode',\n        StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode',\n        StrictParamDupe: 'Strict mode function may not have duplicate parameter names',\n        StrictFunctionName: 'Function name may not be eval or arguments in strict mode',\n        StrictOctalLiteral: 'Octal literals are not allowed in strict mode.',\n        StrictDelete: 'Delete of an unqualified identifier in strict mode.',\n        StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode',\n        StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode',\n        StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode',\n        StrictReservedWord: 'Use of future reserved word in strict mode',\n        TemplateOctalLiteral: 'Octal literals are not allowed in template strings.',\n        ParameterAfterRestParameter: 'Rest parameter must be last formal parameter',\n        DefaultRestParameter: 'Unexpected token =',\n        ObjectPatternAsRestParameter: 'Unexpected token {',\n        DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals',\n        ConstructorSpecialMethod: 'Class constructor may not be an accessor',\n        DuplicateConstructor: 'A class may only have one constructor',\n        StaticPrototype: 'Classes may not have static property named prototype',\n        MissingFromClause: 'Unexpected token',\n        NoAsAfterImportNamespace: 'Unexpected token',\n        InvalidModuleSpecifier: 'Unexpected token',\n        IllegalImportDeclaration: 'Unexpected token',\n        IllegalExportDeclaration: 'Unexpected token',\n        DuplicateBinding: 'Duplicate binding %0'\n    };\n\n    // See also tools/generate-unicode-regex.js.\n    Regex = {\n        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart:\n        NonAsciiIdentifierStart: /[\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u064A\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE\\u06EF\\u06FA-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07CA-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u08A0-\\u08B2\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B71\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58\\u0C59\\u0C60\\u0C61\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CF1\\u0CF2\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D60\\u0D61\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EDC-\\u0EDF\\u0F00\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1380-\\u138F\\u13A0-\\u13F4\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u1820-\\u1877\\u1880-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1950-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19C1-\\u19C7\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B83-\\u1BA0\\u1BAE\\u1BAF\\u1BBA-\\u1BE5\\u1C00-\\u1C23\\u1C4D-\\u1C4F\\u1C5A-\\u1C7D\\u1CE9-\\u1CEC\\u1CEE-\\u1CF1\\u1CF5\\u1CF6\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2071\\u207F\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2118-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2160-\\u2188\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u309B-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312D\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FCC\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA61F\\uA62A\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6EF\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA78E\\uA790-\\uA7AD\\uA7B0\\uA7B1\\uA7F7-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA840-\\uA873\\uA882-\\uA8B3\\uA8F2-\\uA8F7\\uA8FB\\uA90A-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF\\uA9E0-\\uA9E4\\uA9E6-\\uA9EF\\uA9FA-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB5F\\uAB64\\uAB65\\uABC0-\\uABE2\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]|\\uD800[\\uDC00-\\uDC0B\\uDC0D-\\uDC26\\uDC28-\\uDC3A\\uDC3C\\uDC3D\\uDC3F-\\uDC4D\\uDC50-\\uDC5D\\uDC80-\\uDCFA\\uDD40-\\uDD74\\uDE80-\\uDE9C\\uDEA0-\\uDED0\\uDF00-\\uDF1F\\uDF30-\\uDF4A\\uDF50-\\uDF75\\uDF80-\\uDF9D\\uDFA0-\\uDFC3\\uDFC8-\\uDFCF\\uDFD1-\\uDFD5]|\\uD801[\\uDC00-\\uDC9D\\uDD00-\\uDD27\\uDD30-\\uDD63\\uDE00-\\uDF36\\uDF40-\\uDF55\\uDF60-\\uDF67]|\\uD802[\\uDC00-\\uDC05\\uDC08\\uDC0A-\\uDC35\\uDC37\\uDC38\\uDC3C\\uDC3F-\\uDC55\\uDC60-\\uDC76\\uDC80-\\uDC9E\\uDD00-\\uDD15\\uDD20-\\uDD39\\uDD80-\\uDDB7\\uDDBE\\uDDBF\\uDE00\\uDE10-\\uDE13\\uDE15-\\uDE17\\uDE19-\\uDE33\\uDE60-\\uDE7C\\uDE80-\\uDE9C\\uDEC0-\\uDEC7\\uDEC9-\\uDEE4\\uDF00-\\uDF35\\uDF40-\\uDF55\\uDF60-\\uDF72\\uDF80-\\uDF91]|\\uD803[\\uDC00-\\uDC48]|\\uD804[\\uDC03-\\uDC37\\uDC83-\\uDCAF\\uDCD0-\\uDCE8\\uDD03-\\uDD26\\uDD50-\\uDD72\\uDD76\\uDD83-\\uDDB2\\uDDC1-\\uDDC4\\uDDDA\\uDE00-\\uDE11\\uDE13-\\uDE2B\\uDEB0-\\uDEDE\\uDF05-\\uDF0C\\uDF0F\\uDF10\\uDF13-\\uDF28\\uDF2A-\\uDF30\\uDF32\\uDF33\\uDF35-\\uDF39\\uDF3D\\uDF5D-\\uDF61]|\\uD805[\\uDC80-\\uDCAF\\uDCC4\\uDCC5\\uDCC7\\uDD80-\\uDDAE\\uDE00-\\uDE2F\\uDE44\\uDE80-\\uDEAA]|\\uD806[\\uDCA0-\\uDCDF\\uDCFF\\uDEC0-\\uDEF8]|\\uD808[\\uDC00-\\uDF98]|\\uD809[\\uDC00-\\uDC6E]|[\\uD80C\\uD840-\\uD868\\uD86A-\\uD86C][\\uDC00-\\uDFFF]|\\uD80D[\\uDC00-\\uDC2E]|\\uD81A[\\uDC00-\\uDE38\\uDE40-\\uDE5E\\uDED0-\\uDEED\\uDF00-\\uDF2F\\uDF40-\\uDF43\\uDF63-\\uDF77\\uDF7D-\\uDF8F]|\\uD81B[\\uDF00-\\uDF44\\uDF50\\uDF93-\\uDF9F]|\\uD82C[\\uDC00\\uDC01]|\\uD82F[\\uDC00-\\uDC6A\\uDC70-\\uDC7C\\uDC80-\\uDC88\\uDC90-\\uDC99]|\\uD835[\\uDC00-\\uDC54\\uDC56-\\uDC9C\\uDC9E\\uDC9F\\uDCA2\\uDCA5\\uDCA6\\uDCA9-\\uDCAC\\uDCAE-\\uDCB9\\uDCBB\\uDCBD-\\uDCC3\\uDCC5-\\uDD05\\uDD07-\\uDD0A\\uDD0D-\\uDD14\\uDD16-\\uDD1C\\uDD1E-\\uDD39\\uDD3B-\\uDD3E\\uDD40-\\uDD44\\uDD46\\uDD4A-\\uDD50\\uDD52-\\uDEA5\\uDEA8-\\uDEC0\\uDEC2-\\uDEDA\\uDEDC-\\uDEFA\\uDEFC-\\uDF14\\uDF16-\\uDF34\\uDF36-\\uDF4E\\uDF50-\\uDF6E\\uDF70-\\uDF88\\uDF8A-\\uDFA8\\uDFAA-\\uDFC2\\uDFC4-\\uDFCB]|\\uD83A[\\uDC00-\\uDCC4]|\\uD83B[\\uDE00-\\uDE03\\uDE05-\\uDE1F\\uDE21\\uDE22\\uDE24\\uDE27\\uDE29-\\uDE32\\uDE34-\\uDE37\\uDE39\\uDE3B\\uDE42\\uDE47\\uDE49\\uDE4B\\uDE4D-\\uDE4F\\uDE51\\uDE52\\uDE54\\uDE57\\uDE59\\uDE5B\\uDE5D\\uDE5F\\uDE61\\uDE62\\uDE64\\uDE67-\\uDE6A\\uDE6C-\\uDE72\\uDE74-\\uDE77\\uDE79-\\uDE7C\\uDE7E\\uDE80-\\uDE89\\uDE8B-\\uDE9B\\uDEA1-\\uDEA3\\uDEA5-\\uDEA9\\uDEAB-\\uDEBB]|\\uD869[\\uDC00-\\uDED6\\uDF00-\\uDFFF]|\\uD86D[\\uDC00-\\uDF34\\uDF40-\\uDFFF]|\\uD86E[\\uDC00-\\uDC1D]|\\uD87E[\\uDC00-\\uDE1D]/,\n\n        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart:\n        NonAsciiIdentifierPart: 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   };\n\n    // Ensure the condition is true, otherwise throw an error.\n    // This is only to have a better contract semantic, i.e. another safety net\n    // to catch a logic error. The condition shall be fulfilled in normal case.\n    // Do NOT use this to enforce a certain condition on any user input.\n\n    function assert(condition, message) {\n        /* istanbul ignore if */\n        if (!condition) {\n            throw new Error('ASSERT: ' + message);\n        }\n    }\n\n    function isDecimalDigit(ch) {\n        return (ch >= 0x30 && ch <= 0x39);   // 0..9\n    }\n\n    function isHexDigit(ch) {\n        return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;\n    }\n\n    function isOctalDigit(ch) {\n        return '01234567'.indexOf(ch) >= 0;\n    }\n\n    function octalToDecimal(ch) {\n        // \\0 is not octal escape sequence\n        var octal = (ch !== '0'), code = '01234567'.indexOf(ch);\n\n        if (index < length && isOctalDigit(source[index])) {\n            octal = true;\n            code = code * 8 + '01234567'.indexOf(source[index++]);\n\n            // 3 digits are only allowed when string starts\n            // with 0, 1, 2, 3\n            if ('0123'.indexOf(ch) >= 0 &&\n                    index < length &&\n                    isOctalDigit(source[index])) {\n                code = code * 8 + '01234567'.indexOf(source[index++]);\n            }\n        }\n\n        return {\n            code: code,\n            octal: octal\n        };\n    }\n\n    // ECMA-262 11.2 White Space\n\n    function isWhiteSpace(ch) {\n        return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) ||\n            (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0);\n    }\n\n    // ECMA-262 11.3 Line Terminators\n\n    function isLineTerminator(ch) {\n        return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029);\n    }\n\n    // ECMA-262 11.6 Identifier Names and Identifiers\n\n    function fromCodePoint(cp) {\n        return (cp < 0x10000) ? String.fromCharCode(cp) :\n            String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) +\n            String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023));\n    }\n\n    function isIdentifierStart(ch) {\n        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)\n            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z\n            (ch >= 0x61 && ch <= 0x7A) ||         // a..z\n            (ch === 0x5C) ||                      // \\ (backslash)\n            ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch)));\n    }\n\n    function isIdentifierPart(ch) {\n        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)\n            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z\n            (ch >= 0x61 && ch <= 0x7A) ||         // a..z\n            (ch >= 0x30 && ch <= 0x39) ||         // 0..9\n            (ch === 0x5C) ||                      // \\ (backslash)\n            ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch)));\n    }\n\n    // ECMA-262 11.6.2.2 Future Reserved Words\n\n    function isFutureReservedWord(id) {\n        switch (id) {\n        case 'enum':\n        case 'export':\n        case 'import':\n        case 'super':\n            return true;\n        default:\n            return false;\n        }\n    }\n\n    function isStrictModeReservedWord(id) {\n        switch (id) {\n        case 'implements':\n        case 'interface':\n        case 'package':\n        case 'private':\n        case 'protected':\n        case 'public':\n        case 'static':\n        case 'yield':\n        case 'let':\n            return true;\n        default:\n            return false;\n        }\n    }\n\n    function isRestrictedWord(id) {\n        return id === 'eval' || id === 'arguments';\n    }\n\n    // ECMA-262 11.6.2.1 Keywords\n\n    function isKeyword(id) {\n        switch (id.length) {\n        case 2:\n            return (id === 'if') || (id === 'in') || (id === 'do');\n        case 3:\n            return (id === 'var') || (id === 'for') || (id === 'new') ||\n                (id === 'try') || (id === 'let');\n        case 4:\n            return (id === 'this') || (id === 'else') || (id === 'case') ||\n                (id === 'void') || (id === 'with') || (id === 'enum');\n        case 5:\n            return (id === 'while') || (id === 'break') || (id === 'catch') ||\n                (id === 'throw') || (id === 'const') || (id === 'yield') ||\n                (id === 'class') || (id === 'super');\n        case 6:\n            return (id === 'return') || (id === 'typeof') || (id === 'delete') ||\n                (id === 'switch') || (id === 'export') || (id === 'import');\n        case 7:\n            return (id === 'default') || (id === 'finally') || (id === 'extends');\n        case 8:\n            return (id === 'function') || (id === 'continue') || (id === 'debugger');\n        case 10:\n            return (id === 'instanceof');\n        default:\n            return false;\n        }\n    }\n\n    // ECMA-262 11.4 Comments\n\n    function addComment(type, value, start, end, loc) {\n        var comment;\n\n        assert(typeof start === 'number', 'Comment must have valid position');\n\n        state.lastCommentStart = start;\n\n        comment = {\n            type: type,\n            value: value\n        };\n        if (extra.range) {\n            comment.range = [start, end];\n        }\n        if (extra.loc) {\n            comment.loc = loc;\n        }\n        extra.comments.push(comment);\n        if (extra.attachComment) {\n            extra.leadingComments.push(comment);\n            extra.trailingComments.push(comment);\n        }\n        if (extra.tokenize) {\n            comment.type = comment.type + 'Comment';\n            if (extra.delegate) {\n                comment = extra.delegate(comment);\n            }\n            extra.tokens.push(comment);\n        }\n    }\n\n    function skipSingleLineComment(offset) {\n        var start, loc, ch, comment;\n\n        start = index - offset;\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart - offset\n            }\n        };\n\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            ++index;\n            if (isLineTerminator(ch)) {\n                hasLineTerminator = true;\n                if (extra.comments) {\n                    comment = source.slice(start + offset, index - 1);\n                    loc.end = {\n                        line: lineNumber,\n                        column: index - lineStart - 1\n                    };\n                    addComment('Line', comment, start, index - 1, loc);\n                }\n                if (ch === 13 && source.charCodeAt(index) === 10) {\n                    ++index;\n                }\n                ++lineNumber;\n                lineStart = index;\n                return;\n            }\n        }\n\n        if (extra.comments) {\n            comment = source.slice(start + offset, index);\n            loc.end = {\n                line: lineNumber,\n                column: index - lineStart\n            };\n            addComment('Line', comment, start, index, loc);\n        }\n    }\n\n    function skipMultiLineComment() {\n        var start, loc, ch, comment;\n\n        if (extra.comments) {\n            start = index - 2;\n            loc = {\n                start: {\n                    line: lineNumber,\n                    column: index - lineStart - 2\n                }\n            };\n        }\n\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (isLineTerminator(ch)) {\n                if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) {\n                    ++index;\n                }\n                hasLineTerminator = true;\n                ++lineNumber;\n                ++index;\n                lineStart = index;\n            } else if (ch === 0x2A) {\n                // Block comment ends with '*/'.\n                if (source.charCodeAt(index + 1) === 0x2F) {\n                    ++index;\n                    ++index;\n                    if (extra.comments) {\n                        comment = source.slice(start + 2, index - 2);\n                        loc.end = {\n                            line: lineNumber,\n                            column: index - lineStart\n                        };\n                        addComment('Block', comment, start, index, loc);\n                    }\n                    return;\n                }\n                ++index;\n            } else {\n                ++index;\n            }\n        }\n\n        // Ran off the end of the file - the whole thing is a comment\n        if (extra.comments) {\n            loc.end = {\n                line: lineNumber,\n                column: index - lineStart\n            };\n            comment = source.slice(start + 2, index);\n            addComment('Block', comment, start, index, loc);\n        }\n        tolerateUnexpectedToken();\n    }\n\n    function skipComment() {\n        var ch, start;\n        hasLineTerminator = false;\n\n        start = (index === 0);\n        while (index < length) {\n            ch = source.charCodeAt(index);\n\n            if (isWhiteSpace(ch)) {\n                ++index;\n            } else if (isLineTerminator(ch)) {\n                hasLineTerminator = true;\n                ++index;\n                if (ch === 0x0D && source.charCodeAt(index) === 0x0A) {\n                    ++index;\n                }\n                ++lineNumber;\n                lineStart = index;\n                start = true;\n            } else if (ch === 0x2F) { // U+002F is '/'\n                ch = source.charCodeAt(index + 1);\n                if (ch === 0x2F) {\n                    ++index;\n                    ++index;\n                    skipSingleLineComment(2);\n                    start = true;\n                } else if (ch === 0x2A) {  // U+002A is '*'\n                    ++index;\n                    ++index;\n                    skipMultiLineComment();\n                } else {\n                    break;\n                }\n            } else if (start && ch === 0x2D) { // U+002D is '-'\n                // U+003E is '>'\n                if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) {\n                    // '-->' is a single-line comment\n                    index += 3;\n                    skipSingleLineComment(3);\n                } else {\n                    break;\n                }\n            } else if (ch === 0x3C) { // U+003C is '<'\n                if (source.slice(index + 1, index + 4) === '!--') {\n                    ++index; // `<`\n                    ++index; // `!`\n                    ++index; // `-`\n                    ++index; // `-`\n                    skipSingleLineComment(4);\n                } else {\n                    break;\n                }\n            } else {\n                break;\n            }\n        }\n    }\n\n    function scanHexEscape(prefix) {\n        var i, len, ch, code = 0;\n\n        len = (prefix === 'u') ? 4 : 2;\n        for (i = 0; i < len; ++i) {\n            if (index < length && isHexDigit(source[index])) {\n                ch = source[index++];\n                code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());\n            } else {\n                return '';\n            }\n        }\n        return String.fromCharCode(code);\n    }\n\n    function scanUnicodeCodePointEscape() {\n        var ch, code;\n\n        ch = source[index];\n        code = 0;\n\n        // At least, one hex digit is required.\n        if (ch === '}') {\n            throwUnexpectedToken();\n        }\n\n        while (index < length) {\n            ch = source[index++];\n            if (!isHexDigit(ch)) {\n                break;\n            }\n            code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());\n        }\n\n        if (code > 0x10FFFF || ch !== '}') {\n            throwUnexpectedToken();\n        }\n\n        return fromCodePoint(code);\n    }\n\n    function codePointAt(i) {\n        var cp, first, second;\n\n        cp = source.charCodeAt(i);\n        if (cp >= 0xD800 && cp <= 0xDBFF) {\n            second = source.charCodeAt(i + 1);\n            if (second >= 0xDC00 && second <= 0xDFFF) {\n                first = cp;\n                cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;\n            }\n        }\n\n        return cp;\n    }\n\n    function getComplexIdentifier() {\n        var cp, ch, id;\n\n        cp = codePointAt(index);\n        id = fromCodePoint(cp);\n        index += id.length;\n\n        // '\\u' (U+005C, U+0075) denotes an escaped character.\n        if (cp === 0x5C) {\n            if (source.charCodeAt(index) !== 0x75) {\n                throwUnexpectedToken();\n            }\n            ++index;\n            if (source[index] === '{') {\n                ++index;\n                ch = scanUnicodeCodePointEscape();\n            } else {\n                ch = scanHexEscape('u');\n                cp = ch.charCodeAt(0);\n                if (!ch || ch === '\\\\' || !isIdentifierStart(cp)) {\n                    throwUnexpectedToken();\n                }\n            }\n            id = ch;\n        }\n\n        while (index < length) {\n            cp = codePointAt(index);\n            if (!isIdentifierPart(cp)) {\n                break;\n            }\n            ch = fromCodePoint(cp);\n            id += ch;\n            index += ch.length;\n\n            // '\\u' (U+005C, U+0075) denotes an escaped character.\n            if (cp === 0x5C) {\n                id = id.substr(0, id.length - 1);\n                if (source.charCodeAt(index) !== 0x75) {\n                    throwUnexpectedToken();\n                }\n                ++index;\n                if (source[index] === '{') {\n                    ++index;\n                    ch = scanUnicodeCodePointEscape();\n                } else {\n                    ch = scanHexEscape('u');\n                    cp = ch.charCodeAt(0);\n                    if (!ch || ch === '\\\\' || !isIdentifierPart(cp)) {\n                        throwUnexpectedToken();\n                    }\n                }\n                id += ch;\n            }\n        }\n\n        return id;\n    }\n\n    function getIdentifier() {\n        var start, ch;\n\n        start = index++;\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (ch === 0x5C) {\n                // Blackslash (U+005C) marks Unicode escape sequence.\n                index = start;\n                return getComplexIdentifier();\n            } else if (ch >= 0xD800 && ch < 0xDFFF) {\n                // Need to handle surrogate pairs.\n                index = start;\n                return getComplexIdentifier();\n            }\n            if (isIdentifierPart(ch)) {\n                ++index;\n            } else {\n                break;\n            }\n        }\n\n        return source.slice(start, index);\n    }\n\n    function scanIdentifier() {\n        var start, id, type;\n\n        start = index;\n\n        // Backslash (U+005C) starts an escaped character.\n        id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : getIdentifier();\n\n        // There is no keyword or literal with only one character.\n        // Thus, it must be an identifier.\n        if (id.length === 1) {\n            type = Token.Identifier;\n        } else if (isKeyword(id)) {\n            type = Token.Keyword;\n        } else if (id === 'null') {\n            type = Token.NullLiteral;\n        } else if (id === 'true' || id === 'false') {\n            type = Token.BooleanLiteral;\n        } else {\n            type = Token.Identifier;\n        }\n\n        return {\n            type: type,\n            value: id,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n\n    // ECMA-262 11.7 Punctuators\n\n    function scanPunctuator() {\n        var token, str;\n\n        token = {\n            type: Token.Punctuator,\n            value: '',\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: index,\n            end: index\n        };\n\n        // Check for most common single-character punctuators.\n        str = source[index];\n        switch (str) {\n\n        case '(':\n            if (extra.tokenize) {\n                extra.openParenToken = extra.tokenValues.length;\n            }\n            ++index;\n            break;\n\n        case '{':\n            if (extra.tokenize) {\n                extra.openCurlyToken = extra.tokenValues.length;\n            }\n            state.curlyStack.push('{');\n            ++index;\n            break;\n\n        case '.':\n            ++index;\n            if (source[index] === '.' && source[index + 1] === '.') {\n                // Spread operator: ...\n                index += 2;\n                str = '...';\n            }\n            break;\n\n        case '}':\n            ++index;\n            state.curlyStack.pop();\n            break;\n        case ')':\n        case ';':\n        case ',':\n        case '[':\n        case ']':\n        case ':':\n        case '?':\n        case '~':\n            ++index;\n            break;\n\n        default:\n            // 4-character punctuator.\n            str = source.substr(index, 4);\n            if (str === '>>>=') {\n                index += 4;\n            } else {\n\n                // 3-character punctuators.\n                str = str.substr(0, 3);\n                if (str === '===' || str === '!==' || str === '>>>' ||\n                    str === '<<=' || str === '>>=') {\n                    index += 3;\n                } else {\n\n                    // 2-character punctuators.\n                    str = str.substr(0, 2);\n                    if (str === '&&' || str === '||' || str === '==' || str === '!=' ||\n                        str === '+=' || str === '-=' || str === '*=' || str === '/=' ||\n                        str === '++' || str === '--' || str === '<<' || str === '>>' ||\n                        str === '&=' || str === '|=' || str === '^=' || str === '%=' ||\n                        str === '<=' || str === '>=' || str === '=>') {\n                        index += 2;\n                    } else {\n\n                        // 1-character punctuators.\n                        str = source[index];\n                        if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {\n                            ++index;\n                        }\n                    }\n                }\n            }\n        }\n\n        if (index === token.start) {\n            throwUnexpectedToken();\n        }\n\n        token.end = index;\n        token.value = str;\n        return token;\n    }\n\n    // ECMA-262 11.8.3 Numeric Literals\n\n    function scanHexLiteral(start) {\n        var number = '';\n\n        while (index < length) {\n            if (!isHexDigit(source[index])) {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (number.length === 0) {\n            throwUnexpectedToken();\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt('0x' + number, 16),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function scanBinaryLiteral(start) {\n        var ch, number;\n\n        number = '';\n\n        while (index < length) {\n            ch = source[index];\n            if (ch !== '0' && ch !== '1') {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (number.length === 0) {\n            // only 0b or 0B\n            throwUnexpectedToken();\n        }\n\n        if (index < length) {\n            ch = source.charCodeAt(index);\n            /* istanbul ignore else */\n            if (isIdentifierStart(ch) || isDecimalDigit(ch)) {\n                throwUnexpectedToken();\n            }\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt(number, 2),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function scanOctalLiteral(prefix, start) {\n        var number, octal;\n\n        if (isOctalDigit(prefix)) {\n            octal = true;\n            number = '0' + source[index++];\n        } else {\n            octal = false;\n            ++index;\n            number = '';\n        }\n\n        while (index < length) {\n            if (!isOctalDigit(source[index])) {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (!octal && number.length === 0) {\n            // only 0o or 0O\n            throwUnexpectedToken();\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt(number, 8),\n            octal: octal,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function isImplicitOctalLiteral() {\n        var i, ch;\n\n        // Implicit octal, unless there is a non-octal digit.\n        // (Annex B.1.1 on Numeric Literals)\n        for (i = index + 1; i < length; ++i) {\n            ch = source[i];\n            if (ch === '8' || ch === '9') {\n                return false;\n            }\n            if (!isOctalDigit(ch)) {\n                return true;\n            }\n        }\n\n        return true;\n    }\n\n    function scanNumericLiteral() {\n        var number, start, ch;\n\n        ch = source[index];\n        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),\n            'Numeric literal must start with a decimal digit or a decimal point');\n\n        start = index;\n        number = '';\n        if (ch !== '.') {\n            number = source[index++];\n            ch = source[index];\n\n            // Hex number starts with '0x'.\n            // Octal number starts with '0'.\n            // Octal number in ES6 starts with '0o'.\n            // Binary number in ES6 starts with '0b'.\n            if (number === '0') {\n                if (ch === 'x' || ch === 'X') {\n                    ++index;\n                    return scanHexLiteral(start);\n                }\n                if (ch === 'b' || ch === 'B') {\n                    ++index;\n                    return scanBinaryLiteral(start);\n                }\n                if (ch === 'o' || ch === 'O') {\n                    return scanOctalLiteral(ch, start);\n                }\n\n                if (isOctalDigit(ch)) {\n                    if (isImplicitOctalLiteral()) {\n                        return scanOctalLiteral(ch, start);\n                    }\n                }\n            }\n\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === '.') {\n            number += source[index++];\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === 'e' || ch === 'E') {\n            number += source[index++];\n\n            ch = source[index];\n            if (ch === '+' || ch === '-') {\n                number += source[index++];\n            }\n            if (isDecimalDigit(source.charCodeAt(index))) {\n                while (isDecimalDigit(source.charCodeAt(index))) {\n                    number += source[index++];\n                }\n            } else {\n                throwUnexpectedToken();\n            }\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseFloat(number),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.4 String Literals\n\n    function scanStringLiteral() {\n        var str = '', quote, start, ch, unescaped, octToDec, octal = false;\n\n        quote = source[index];\n        assert((quote === '\\'' || quote === '\"'),\n            'String literal must starts with a quote');\n\n        start = index;\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n\n            if (ch === quote) {\n                quote = '';\n                break;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'u':\n                    case 'x':\n                        if (source[index] === '{') {\n                            ++index;\n                            str += scanUnicodeCodePointEscape();\n                        } else {\n                            unescaped = scanHexEscape(ch);\n                            if (!unescaped) {\n                                throw throwUnexpectedToken();\n                            }\n                            str += unescaped;\n                        }\n                        break;\n                    case 'n':\n                        str += '\\n';\n                        break;\n                    case 'r':\n                        str += '\\r';\n                        break;\n                    case 't':\n                        str += '\\t';\n                        break;\n                    case 'b':\n                        str += '\\b';\n                        break;\n                    case 'f':\n                        str += '\\f';\n                        break;\n                    case 'v':\n                        str += '\\x0B';\n                        break;\n                    case '8':\n                    case '9':\n                        str += ch;\n                        tolerateUnexpectedToken();\n                        break;\n\n                    default:\n                        if (isOctalDigit(ch)) {\n                            octToDec = octalToDecimal(ch);\n\n                            octal = octToDec.octal || octal;\n                            str += String.fromCharCode(octToDec.code);\n                        } else {\n                            str += ch;\n                        }\n                        break;\n                    }\n                } else {\n                    ++lineNumber;\n                    if (ch === '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                    lineStart = index;\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                break;\n            } else {\n                str += ch;\n            }\n        }\n\n        if (quote !== '') {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.StringLiteral,\n            value: str,\n            octal: octal,\n            lineNumber: startLineNumber,\n            lineStart: startLineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.6 Template Literal Lexical Components\n\n    function scanTemplate() {\n        var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped;\n\n        terminated = false;\n        tail = false;\n        start = index;\n        head = (source[index] === '`');\n        rawOffset = 2;\n\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n            if (ch === '`') {\n                rawOffset = 1;\n                tail = true;\n                terminated = true;\n                break;\n            } else if (ch === '$') {\n                if (source[index] === '{') {\n                    state.curlyStack.push('${');\n                    ++index;\n                    terminated = true;\n                    break;\n                }\n                cooked += ch;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'n':\n                        cooked += '\\n';\n                        break;\n                    case 'r':\n                        cooked += '\\r';\n                        break;\n                    case 't':\n                        cooked += '\\t';\n                        break;\n                    case 'u':\n                    case 'x':\n                        if (source[index] === '{') {\n                            ++index;\n                            cooked += scanUnicodeCodePointEscape();\n                        } else {\n                            restore = index;\n                            unescaped = scanHexEscape(ch);\n                            if (unescaped) {\n                                cooked += unescaped;\n                            } else {\n                                index = restore;\n                                cooked += ch;\n                            }\n                        }\n                        break;\n                    case 'b':\n                        cooked += '\\b';\n                        break;\n                    case 'f':\n                        cooked += '\\f';\n                        break;\n                    case 'v':\n                        cooked += '\\v';\n                        break;\n\n                    default:\n                        if (ch === '0') {\n                            if (isDecimalDigit(source.charCodeAt(index))) {\n                                // Illegal: \\01 \\02 and so on\n                                throwError(Messages.TemplateOctalLiteral);\n                            }\n                            cooked += '\\0';\n                        } else if (isOctalDigit(ch)) {\n                            // Illegal: \\1 \\2\n                            throwError(Messages.TemplateOctalLiteral);\n                        } else {\n                            cooked += ch;\n                        }\n                        break;\n                    }\n                } else {\n                    ++lineNumber;\n                    if (ch === '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                    lineStart = index;\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                ++lineNumber;\n                if (ch === '\\r' && source[index] === '\\n') {\n                    ++index;\n                }\n                lineStart = index;\n                cooked += '\\n';\n            } else {\n                cooked += ch;\n            }\n        }\n\n        if (!terminated) {\n            throwUnexpectedToken();\n        }\n\n        if (!head) {\n            state.curlyStack.pop();\n        }\n\n        return {\n            type: Token.Template,\n            value: {\n                cooked: cooked,\n                raw: source.slice(start + 1, index - rawOffset)\n            },\n            head: head,\n            tail: tail,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.5 Regular Expression Literals\n\n    function testRegExp(pattern, flags) {\n        // The BMP character to use as a replacement for astral symbols when\n        // translating an ES6 \"u\"-flagged pattern to an ES5-compatible\n        // approximation.\n        // Note: replacing with '\\uFFFF' enables false positives in unlikely\n        // scenarios. For example, `[\\u{1044f}-\\u{10440}]` is an invalid\n        // pattern that would not be detected by this substitution.\n        var astralSubstitute = '\\uFFFF',\n            tmp = pattern;\n\n        if (flags.indexOf('u') >= 0) {\n            tmp = tmp\n                // Replace every Unicode escape sequence with the equivalent\n                // BMP character or a constant ASCII code point in the case of\n                // astral symbols. (See the above note on `astralSubstitute`\n                // for more information.)\n                .replace(/\\\\u\\{([0-9a-fA-F]+)\\}|\\\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) {\n                    var codePoint = parseInt($1 || $2, 16);\n                    if (codePoint > 0x10FFFF) {\n                        throwUnexpectedToken(null, Messages.InvalidRegExp);\n                    }\n                    if (codePoint <= 0xFFFF) {\n                        return String.fromCharCode(codePoint);\n                    }\n                    return astralSubstitute;\n                })\n                // Replace each paired surrogate with a single ASCII symbol to\n                // avoid throwing on regular expressions that are only valid in\n                // combination with the \"u\" flag.\n                .replace(\n                    /[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]/g,\n                    astralSubstitute\n                );\n        }\n\n        // First, detect invalid regular expressions.\n        try {\n            RegExp(tmp);\n        } catch (e) {\n            throwUnexpectedToken(null, Messages.InvalidRegExp);\n        }\n\n        // Return a regular expression object for this pattern-flag pair, or\n        // `null` in case the current environment doesn't support the flags it\n        // uses.\n        try {\n            return new RegExp(pattern, flags);\n        } catch (exception) {\n            return null;\n        }\n    }\n\n    function scanRegExpBody() {\n        var ch, str, classMarker, terminated, body;\n\n        ch = source[index];\n        assert(ch === '/', 'Regular expression literal must start with a slash');\n        str = source[index++];\n\n        classMarker = false;\n        terminated = false;\n        while (index < length) {\n            ch = source[index++];\n            str += ch;\n            if (ch === '\\\\') {\n                ch = source[index++];\n                // ECMA-262 7.8.5\n                if (isLineTerminator(ch.charCodeAt(0))) {\n                    throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n                }\n                str += ch;\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n            } else if (classMarker) {\n                if (ch === ']') {\n                    classMarker = false;\n                }\n            } else {\n                if (ch === '/') {\n                    terminated = true;\n                    break;\n                } else if (ch === '[') {\n                    classMarker = true;\n                }\n            }\n        }\n\n        if (!terminated) {\n            throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n        }\n\n        // Exclude leading and trailing slash.\n        body = str.substr(1, str.length - 2);\n        return {\n            value: body,\n            literal: str\n        };\n    }\n\n    function scanRegExpFlags() {\n        var ch, str, flags, restore;\n\n        str = '';\n        flags = '';\n        while (index < length) {\n            ch = source[index];\n            if (!isIdentifierPart(ch.charCodeAt(0))) {\n                break;\n            }\n\n            ++index;\n            if (ch === '\\\\' && index < length) {\n                ch = source[index];\n                if (ch === 'u') {\n                    ++index;\n                    restore = index;\n                    ch = scanHexEscape('u');\n                    if (ch) {\n                        flags += ch;\n                        for (str += '\\\\u'; restore < index; ++restore) {\n                            str += source[restore];\n                        }\n                    } else {\n                        index = restore;\n                        flags += 'u';\n                        str += '\\\\u';\n                    }\n                    tolerateUnexpectedToken();\n                } else {\n                    str += '\\\\';\n                    tolerateUnexpectedToken();\n                }\n            } else {\n                flags += ch;\n                str += ch;\n            }\n        }\n\n        return {\n            value: flags,\n            literal: str\n        };\n    }\n\n    function scanRegExp() {\n        var start, body, flags, value;\n        scanning = true;\n\n        lookahead = null;\n        skipComment();\n        start = index;\n\n        body = scanRegExpBody();\n        flags = scanRegExpFlags();\n        value = testRegExp(body.value, flags.value);\n        scanning = false;\n        if (extra.tokenize) {\n            return {\n                type: Token.RegularExpression,\n                value: value,\n                regex: {\n                    pattern: body.value,\n                    flags: flags.value\n                },\n                lineNumber: lineNumber,\n                lineStart: lineStart,\n                start: start,\n                end: index\n            };\n        }\n\n        return {\n            literal: body.literal + flags.literal,\n            value: value,\n            regex: {\n                pattern: body.value,\n                flags: flags.value\n            },\n            start: start,\n            end: index\n        };\n    }\n\n    function collectRegex() {\n        var pos, loc, regex, token;\n\n        skipComment();\n\n        pos = index;\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart\n            }\n        };\n\n        regex = scanRegExp();\n\n        loc.end = {\n            line: lineNumber,\n            column: index - lineStart\n        };\n\n        /* istanbul ignore next */\n        if (!extra.tokenize) {\n            // Pop the previous token, which is likely '/' or '/='\n            if (extra.tokens.length > 0) {\n                token = extra.tokens[extra.tokens.length - 1];\n                if (token.range[0] === pos && token.type === 'Punctuator') {\n                    if (token.value === '/' || token.value === '/=') {\n                        extra.tokens.pop();\n                    }\n                }\n            }\n\n            extra.tokens.push({\n                type: 'RegularExpression',\n                value: regex.literal,\n                regex: regex.regex,\n                range: [pos, index],\n                loc: loc\n            });\n        }\n\n        return regex;\n    }\n\n    function isIdentifierName(token) {\n        return token.type === Token.Identifier ||\n            token.type === Token.Keyword ||\n            token.type === Token.BooleanLiteral ||\n            token.type === Token.NullLiteral;\n    }\n\n    // Using the following algorithm:\n    // https://github.com/mozilla/sweet.js/wiki/design\n\n    function advanceSlash() {\n        var regex, previous, check;\n\n        function testKeyword(value) {\n            return value && (value.length > 1) && (value[0] >= 'a') && (value[0] <= 'z');\n        }\n\n        previous = extra.tokenValues[extra.tokens.length - 1];\n        regex = (previous !== null);\n\n        switch (previous) {\n        case 'this':\n        case ']':\n            regex = false;\n            break;\n\n        case ')':\n            check = extra.tokenValues[extra.openParenToken - 1];\n            regex = (check === 'if' || check === 'while' || check === 'for' || check === 'with');\n            break;\n\n        case '}':\n            // Dividing a function by anything makes little sense,\n            // but we have to check for that.\n            regex = false;\n            if (testKeyword(extra.tokenValues[extra.openCurlyToken - 3])) {\n                // Anonymous function, e.g. function(){} /42\n                check = extra.tokenValues[extra.openCurlyToken - 4];\n                regex = check ? (FnExprTokens.indexOf(check) < 0) : false;\n            } else if (testKeyword(extra.tokenValues[extra.openCurlyToken - 4])) {\n                // Named function, e.g. function f(){} /42/\n                check = extra.tokenValues[extra.openCurlyToken - 5];\n                regex = check ? (FnExprTokens.indexOf(check) < 0) : true;\n            }\n        }\n\n        return regex ? collectRegex() : scanPunctuator();\n    }\n\n    function advance() {\n        var cp, token;\n\n        if (index >= length) {\n            return {\n                type: Token.EOF,\n                lineNumber: lineNumber,\n                lineStart: lineStart,\n                start: index,\n                end: index\n            };\n        }\n\n        cp = source.charCodeAt(index);\n\n        if (isIdentifierStart(cp)) {\n            token = scanIdentifier();\n            if (strict && isStrictModeReservedWord(token.value)) {\n                token.type = Token.Keyword;\n            }\n            return token;\n        }\n\n        // Very common: ( and ) and ;\n        if (cp === 0x28 || cp === 0x29 || cp === 0x3B) {\n            return scanPunctuator();\n        }\n\n        // String literal starts with single quote (U+0027) or double quote (U+0022).\n        if (cp === 0x27 || cp === 0x22) {\n            return scanStringLiteral();\n        }\n\n        // Dot (.) U+002E can also start a floating-point number, hence the need\n        // to check the next character.\n        if (cp === 0x2E) {\n            if (isDecimalDigit(source.charCodeAt(index + 1))) {\n                return scanNumericLiteral();\n            }\n            return scanPunctuator();\n        }\n\n        if (isDecimalDigit(cp)) {\n            return scanNumericLiteral();\n        }\n\n        // Slash (/) U+002F can also start a regex.\n        if (extra.tokenize && cp === 0x2F) {\n            return advanceSlash();\n        }\n\n        // Template literals start with ` (U+0060) for template head\n        // or } (U+007D) for template middle or template tail.\n        if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) {\n            return scanTemplate();\n        }\n\n        // Possible identifier start in a surrogate pair.\n        if (cp >= 0xD800 && cp < 0xDFFF) {\n            cp = codePointAt(index);\n            if (isIdentifierStart(cp)) {\n                return scanIdentifier();\n            }\n        }\n\n        return scanPunctuator();\n    }\n\n    function collectToken() {\n        var loc, token, value, entry;\n\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart\n            }\n        };\n\n        token = advance();\n        loc.end = {\n            line: lineNumber,\n            column: index - lineStart\n        };\n\n        if (token.type !== Token.EOF) {\n            value = source.slice(token.start, token.end);\n            entry = {\n                type: TokenName[token.type],\n                value: value,\n                range: [token.start, token.end],\n                loc: loc\n            };\n            if (token.regex) {\n                entry.regex = {\n                    pattern: token.regex.pattern,\n                    flags: token.regex.flags\n                };\n            }\n            if (extra.tokenValues) {\n                extra.tokenValues.push((entry.type === 'Punctuator' || entry.type === 'Keyword') ? entry.value : null);\n            }\n            if (extra.tokenize) {\n                if (!extra.range) {\n                    delete entry.range;\n                }\n                if (!extra.loc) {\n                    delete entry.loc;\n                }\n                if (extra.delegate) {\n                    entry = extra.delegate(entry);\n                }\n            }\n            extra.tokens.push(entry);\n        }\n\n        return token;\n    }\n\n    function lex() {\n        var token;\n        scanning = true;\n\n        lastIndex = index;\n        lastLineNumber = lineNumber;\n        lastLineStart = lineStart;\n\n        skipComment();\n\n        token = lookahead;\n\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n\n        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();\n        scanning = false;\n        return token;\n    }\n\n    function peek() {\n        scanning = true;\n\n        skipComment();\n\n        lastIndex = index;\n        lastLineNumber = lineNumber;\n        lastLineStart = lineStart;\n\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n\n        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();\n        scanning = false;\n    }\n\n    function Position() {\n        this.line = startLineNumber;\n        this.column = startIndex - startLineStart;\n    }\n\n    function SourceLocation() {\n        this.start = new Position();\n        this.end = null;\n    }\n\n    function WrappingSourceLocation(startToken) {\n        this.start = {\n            line: startToken.lineNumber,\n            column: startToken.start - startToken.lineStart\n        };\n        this.end = null;\n    }\n\n    function Node() {\n        if (extra.range) {\n            this.range = [startIndex, 0];\n        }\n        if (extra.loc) {\n            this.loc = new SourceLocation();\n        }\n    }\n\n    function WrappingNode(startToken) {\n        if (extra.range) {\n            this.range = [startToken.start, 0];\n        }\n        if (extra.loc) {\n            this.loc = new WrappingSourceLocation(startToken);\n        }\n    }\n\n    WrappingNode.prototype = Node.prototype = {\n\n        processComment: function () {\n            var lastChild,\n                innerComments,\n                leadingComments,\n                trailingComments,\n                bottomRight = extra.bottomRightStack,\n                i,\n                comment,\n                last = bottomRight[bottomRight.length - 1];\n\n            if (this.type === Syntax.Program) {\n                if (this.body.length > 0) {\n                    return;\n                }\n            }\n            /**\n             * patch innnerComments for properties empty block\n             * `function a() {/** comments **\\/}`\n             */\n\n            if (this.type === Syntax.BlockStatement && this.body.length === 0) {\n                innerComments = [];\n                for (i = extra.leadingComments.length - 1; i >= 0; --i) {\n                    comment = extra.leadingComments[i];\n                    if (this.range[1] >= comment.range[1]) {\n                        innerComments.unshift(comment);\n                        extra.leadingComments.splice(i, 1);\n                        extra.trailingComments.splice(i, 1);\n                    }\n                }\n                if (innerComments.length) {\n                    this.innerComments = innerComments;\n                    //bottomRight.push(this);\n                    return;\n                }\n            }\n\n            if (extra.trailingComments.length > 0) {\n                trailingComments = [];\n                for (i = extra.trailingComments.length - 1; i >= 0; --i) {\n                    comment = extra.trailingComments[i];\n                    if (comment.range[0] >= this.range[1]) {\n                        trailingComments.unshift(comment);\n                        extra.trailingComments.splice(i, 1);\n                    }\n                }\n                extra.trailingComments = [];\n            } else {\n                if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) {\n                    trailingComments = last.trailingComments;\n                    delete last.trailingComments;\n                }\n            }\n\n            // Eating the stack.\n            while (last && last.range[0] >= this.range[0]) {\n                lastChild = bottomRight.pop();\n                last = bottomRight[bottomRight.length - 1];\n            }\n\n            if (lastChild) {\n                if (lastChild.leadingComments) {\n                    leadingComments = [];\n                    for (i = lastChild.leadingComments.length - 1; i >= 0; --i) {\n                        comment = lastChild.leadingComments[i];\n                        if (comment.range[1] <= this.range[0]) {\n                            leadingComments.unshift(comment);\n                            lastChild.leadingComments.splice(i, 1);\n                        }\n                    }\n\n                    if (!lastChild.leadingComments.length) {\n                        lastChild.leadingComments = undefined;\n                    }\n                }\n            } else if (extra.leadingComments.length > 0) {\n                leadingComments = [];\n                for (i = extra.leadingComments.length - 1; i >= 0; --i) {\n                    comment = extra.leadingComments[i];\n                    if (comment.range[1] <= this.range[0]) {\n                        leadingComments.unshift(comment);\n                        extra.leadingComments.splice(i, 1);\n                    }\n                }\n            }\n\n\n            if (leadingComments && leadingComments.length > 0) {\n                this.leadingComments = leadingComments;\n            }\n            if (trailingComments && trailingComments.length > 0) {\n                this.trailingComments = trailingComments;\n            }\n\n            bottomRight.push(this);\n        },\n\n        finish: function () {\n            if (extra.range) {\n                this.range[1] = lastIndex;\n            }\n            if (extra.loc) {\n                this.loc.end = {\n                    line: lastLineNumber,\n                    column: lastIndex - lastLineStart\n                };\n                if (extra.source) {\n                    this.loc.source = extra.source;\n                }\n            }\n\n            if (extra.attachComment) {\n                this.processComment();\n            }\n        },\n\n        finishArrayExpression: function (elements) {\n            this.type = Syntax.ArrayExpression;\n            this.elements = elements;\n            this.finish();\n            return this;\n        },\n\n        finishArrayPattern: function (elements) {\n            this.type = Syntax.ArrayPattern;\n            this.elements = elements;\n            this.finish();\n            return this;\n        },\n\n        finishArrowFunctionExpression: function (params, defaults, body, expression) {\n            this.type = Syntax.ArrowFunctionExpression;\n            this.id = null;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = false;\n            this.expression = expression;\n            this.finish();\n            return this;\n        },\n\n        finishAssignmentExpression: function (operator, left, right) {\n            this.type = Syntax.AssignmentExpression;\n            this.operator = operator;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishAssignmentPattern: function (left, right) {\n            this.type = Syntax.AssignmentPattern;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishBinaryExpression: function (operator, left, right) {\n            this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression;\n            this.operator = operator;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishBlockStatement: function (body) {\n            this.type = Syntax.BlockStatement;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishBreakStatement: function (label) {\n            this.type = Syntax.BreakStatement;\n            this.label = label;\n            this.finish();\n            return this;\n        },\n\n        finishCallExpression: function (callee, args) {\n            this.type = Syntax.CallExpression;\n            this.callee = callee;\n            this.arguments = args;\n            this.finish();\n            return this;\n        },\n\n        finishCatchClause: function (param, body) {\n            this.type = Syntax.CatchClause;\n            this.param = param;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassBody: function (body) {\n            this.type = Syntax.ClassBody;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassDeclaration: function (id, superClass, body) {\n            this.type = Syntax.ClassDeclaration;\n            this.id = id;\n            this.superClass = superClass;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassExpression: function (id, superClass, body) {\n            this.type = Syntax.ClassExpression;\n            this.id = id;\n            this.superClass = superClass;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishConditionalExpression: function (test, consequent, alternate) {\n            this.type = Syntax.ConditionalExpression;\n            this.test = test;\n            this.consequent = consequent;\n            this.alternate = alternate;\n            this.finish();\n            return this;\n        },\n\n        finishContinueStatement: function (label) {\n            this.type = Syntax.ContinueStatement;\n            this.label = label;\n            this.finish();\n            return this;\n        },\n\n        finishDebuggerStatement: function () {\n            this.type = Syntax.DebuggerStatement;\n            this.finish();\n            return this;\n        },\n\n        finishDoWhileStatement: function (body, test) {\n            this.type = Syntax.DoWhileStatement;\n            this.body = body;\n            this.test = test;\n            this.finish();\n            return this;\n        },\n\n        finishEmptyStatement: function () {\n            this.type = Syntax.EmptyStatement;\n            this.finish();\n            return this;\n        },\n\n        finishExpressionStatement: function (expression) {\n            this.type = Syntax.ExpressionStatement;\n            this.expression = expression;\n            this.finish();\n            return this;\n        },\n\n        finishForStatement: function (init, test, update, body) {\n            this.type = Syntax.ForStatement;\n            this.init = init;\n            this.test = test;\n            this.update = update;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishForOfStatement: function (left, right, body) {\n            this.type = Syntax.ForOfStatement;\n            this.left = left;\n            this.right = right;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishForInStatement: function (left, right, body) {\n            this.type = Syntax.ForInStatement;\n            this.left = left;\n            this.right = right;\n            this.body = body;\n            this.each = false;\n            this.finish();\n            return this;\n        },\n\n        finishFunctionDeclaration: function (id, params, defaults, body, generator) {\n            this.type = Syntax.FunctionDeclaration;\n            this.id = id;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = generator;\n            this.expression = false;\n            this.finish();\n            return this;\n        },\n\n        finishFunctionExpression: function (id, params, defaults, body, generator) {\n            this.type = Syntax.FunctionExpression;\n            this.id = id;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = generator;\n            this.expression = false;\n            this.finish();\n            return this;\n        },\n\n        finishIdentifier: function (name) {\n            this.type = Syntax.Identifier;\n            this.name = name;\n            this.finish();\n            return this;\n        },\n\n        finishIfStatement: function (test, consequent, alternate) {\n            this.type = Syntax.IfStatement;\n            this.test = test;\n            this.consequent = consequent;\n            this.alternate = alternate;\n            this.finish();\n            return this;\n        },\n\n        finishLabeledStatement: function (label, body) {\n            this.type = Syntax.LabeledStatement;\n            this.label = label;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishLiteral: function (token) {\n            this.type = Syntax.Literal;\n            this.value = token.value;\n            this.raw = source.slice(token.start, token.end);\n            if (token.regex) {\n                this.regex = token.regex;\n            }\n            this.finish();\n            return this;\n        },\n\n        finishMemberExpression: function (accessor, object, property) {\n            this.type = Syntax.MemberExpression;\n            this.computed = accessor === '[';\n            this.object = object;\n            this.property = property;\n            this.finish();\n            return this;\n        },\n\n        finishMetaProperty: function (meta, property) {\n            this.type = Syntax.MetaProperty;\n            this.meta = meta;\n            this.property = property;\n            this.finish();\n            return this;\n        },\n\n        finishNewExpression: function (callee, args) {\n            this.type = Syntax.NewExpression;\n            this.callee = callee;\n            this.arguments = args;\n            this.finish();\n            return this;\n        },\n\n        finishObjectExpression: function (properties) {\n            this.type = Syntax.ObjectExpression;\n            this.properties = properties;\n            this.finish();\n            return this;\n        },\n\n        finishObjectPattern: function (properties) {\n            this.type = Syntax.ObjectPattern;\n            this.properties = properties;\n            this.finish();\n            return this;\n        },\n\n        finishPostfixExpression: function (operator, argument) {\n            this.type = Syntax.UpdateExpression;\n            this.operator = operator;\n            this.argument = argument;\n            this.prefix = false;\n            this.finish();\n            return this;\n        },\n\n        finishProgram: function (body, sourceType) {\n            this.type = Syntax.Program;\n            this.body = body;\n            this.sourceType = sourceType;\n            this.finish();\n            return this;\n        },\n\n        finishProperty: function (kind, key, computed, value, method, shorthand) {\n            this.type = Syntax.Property;\n            this.key = key;\n            this.computed = computed;\n            this.value = value;\n            this.kind = kind;\n            this.method = method;\n            this.shorthand = shorthand;\n            this.finish();\n            return this;\n        },\n\n        finishRestElement: function (argument) {\n            this.type = Syntax.RestElement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishReturnStatement: function (argument) {\n            this.type = Syntax.ReturnStatement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishSequenceExpression: function (expressions) {\n            this.type = Syntax.SequenceExpression;\n            this.expressions = expressions;\n            this.finish();\n            return this;\n        },\n\n        finishSpreadElement: function (argument) {\n            this.type = Syntax.SpreadElement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishSwitchCase: function (test, consequent) {\n            this.type = Syntax.SwitchCase;\n            this.test = test;\n            this.consequent = consequent;\n            this.finish();\n            return this;\n        },\n\n        finishSuper: function () {\n            this.type = Syntax.Super;\n            this.finish();\n            return this;\n        },\n\n        finishSwitchStatement: function (discriminant, cases) {\n            this.type = Syntax.SwitchStatement;\n            this.discriminant = discriminant;\n            this.cases = cases;\n            this.finish();\n            return this;\n        },\n\n        finishTaggedTemplateExpression: function (tag, quasi) {\n            this.type = Syntax.TaggedTemplateExpression;\n            this.tag = tag;\n            this.quasi = quasi;\n            this.finish();\n            return this;\n        },\n\n        finishTemplateElement: function (value, tail) {\n            this.type = Syntax.TemplateElement;\n            this.value = value;\n            this.tail = tail;\n            this.finish();\n            return this;\n        },\n\n        finishTemplateLiteral: function (quasis, expressions) {\n            this.type = Syntax.TemplateLiteral;\n            this.quasis = quasis;\n            this.expressions = expressions;\n            this.finish();\n            return this;\n        },\n\n        finishThisExpression: function () {\n            this.type = Syntax.ThisExpression;\n            this.finish();\n            return this;\n        },\n\n        finishThrowStatement: function (argument) {\n            this.type = Syntax.ThrowStatement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishTryStatement: function (block, handler, finalizer) {\n            this.type = Syntax.TryStatement;\n            this.block = block;\n            this.guardedHandlers = [];\n            this.handlers = handler ? [handler] : [];\n            this.handler = handler;\n            this.finalizer = finalizer;\n            this.finish();\n            return this;\n        },\n\n        finishUnaryExpression: function (operator, argument) {\n            this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression;\n            this.operator = operator;\n            this.argument = argument;\n            this.prefix = true;\n            this.finish();\n            return this;\n        },\n\n        finishVariableDeclaration: function (declarations) {\n            this.type = Syntax.VariableDeclaration;\n            this.declarations = declarations;\n            this.kind = 'var';\n            this.finish();\n            return this;\n        },\n\n        finishLexicalDeclaration: function (declarations, kind) {\n            this.type = Syntax.VariableDeclaration;\n            this.declarations = declarations;\n            this.kind = kind;\n            this.finish();\n            return this;\n        },\n\n        finishVariableDeclarator: function (id, init) {\n            this.type = Syntax.VariableDeclarator;\n            this.id = id;\n            this.init = init;\n            this.finish();\n            return this;\n        },\n\n        finishWhileStatement: function (test, body) {\n            this.type = Syntax.WhileStatement;\n            this.test = test;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishWithStatement: function (object, body) {\n            this.type = Syntax.WithStatement;\n            this.object = object;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishExportSpecifier: function (local, exported) {\n            this.type = Syntax.ExportSpecifier;\n            this.exported = exported || local;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishImportDefaultSpecifier: function (local) {\n            this.type = Syntax.ImportDefaultSpecifier;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishImportNamespaceSpecifier: function (local) {\n            this.type = Syntax.ImportNamespaceSpecifier;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishExportNamedDeclaration: function (declaration, specifiers, src) {\n            this.type = Syntax.ExportNamedDeclaration;\n            this.declaration = declaration;\n            this.specifiers = specifiers;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishExportDefaultDeclaration: function (declaration) {\n            this.type = Syntax.ExportDefaultDeclaration;\n            this.declaration = declaration;\n            this.finish();\n            return this;\n        },\n\n        finishExportAllDeclaration: function (src) {\n            this.type = Syntax.ExportAllDeclaration;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishImportSpecifier: function (local, imported) {\n            this.type = Syntax.ImportSpecifier;\n            this.local = local || imported;\n            this.imported = imported;\n            this.finish();\n            return this;\n        },\n\n        finishImportDeclaration: function (specifiers, src) {\n            this.type = Syntax.ImportDeclaration;\n            this.specifiers = specifiers;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishYieldExpression: function (argument, delegate) {\n            this.type = Syntax.YieldExpression;\n            this.argument = argument;\n            this.delegate = delegate;\n            this.finish();\n            return this;\n        }\n    };\n\n\n    function recordError(error) {\n        var e, existing;\n\n        for (e = 0; e < extra.errors.length; e++) {\n            existing = extra.errors[e];\n            // Prevent duplicated error.\n            /* istanbul ignore next */\n            if (existing.index === error.index && existing.message === error.message) {\n                return;\n            }\n        }\n\n        extra.errors.push(error);\n    }\n\n    function constructError(msg, column) {\n        var error = new Error(msg);\n        try {\n            throw error;\n        } catch (base) {\n            /* istanbul ignore else */\n            if (Object.create && Object.defineProperty) {\n                error = Object.create(base);\n                Object.defineProperty(error, 'column', { value: column });\n            }\n        } finally {\n            return error;\n        }\n    }\n\n    function createError(line, pos, description) {\n        var msg, column, error;\n\n        msg = 'Line ' + line + ': ' + description;\n        column = pos - (scanning ? lineStart : lastLineStart) + 1;\n        error = constructError(msg, column);\n        error.lineNumber = line;\n        error.description = description;\n        error.index = pos;\n        return error;\n    }\n\n    // Throw an exception\n\n    function throwError(messageFormat) {\n        var args, msg;\n\n        args = Array.prototype.slice.call(arguments, 1);\n        msg = messageFormat.replace(/%(\\d)/g,\n            function (whole, idx) {\n                assert(idx < args.length, 'Message reference must be in range');\n                return args[idx];\n            }\n        );\n\n        throw createError(lastLineNumber, lastIndex, msg);\n    }\n\n    function tolerateError(messageFormat) {\n        var args, msg, error;\n\n        args = Array.prototype.slice.call(arguments, 1);\n        /* istanbul ignore next */\n        msg = messageFormat.replace(/%(\\d)/g,\n            function (whole, idx) {\n                assert(idx < args.length, 'Message reference must be in range');\n                return args[idx];\n            }\n        );\n\n        error = createError(lineNumber, lastIndex, msg);\n        if (extra.errors) {\n            recordError(error);\n        } else {\n            throw error;\n        }\n    }\n\n    // Throw an exception because of the token.\n\n    function unexpectedTokenError(token, message) {\n        var value, msg = message || Messages.UnexpectedToken;\n\n        if (token) {\n            if (!message) {\n                msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS :\n                    (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier :\n                    (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber :\n                    (token.type === Token.StringLiteral) ? Messages.UnexpectedString :\n                    (token.type === Token.Template) ? Messages.UnexpectedTemplate :\n                    Messages.UnexpectedToken;\n\n                if (token.type === Token.Keyword) {\n                    if (isFutureReservedWord(token.value)) {\n                        msg = Messages.UnexpectedReserved;\n                    } else if (strict && isStrictModeReservedWord(token.value)) {\n                        msg = Messages.StrictReservedWord;\n                    }\n                }\n            }\n\n            value = (token.type === Token.Template) ? token.value.raw : token.value;\n        } else {\n            value = 'ILLEGAL';\n        }\n\n        msg = msg.replace('%0', value);\n\n        return (token && typeof token.lineNumber === 'number') ?\n            createError(token.lineNumber, token.start, msg) :\n            createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg);\n    }\n\n    function throwUnexpectedToken(token, message) {\n        throw unexpectedTokenError(token, message);\n    }\n\n    function tolerateUnexpectedToken(token, message) {\n        var error = unexpectedTokenError(token, message);\n        if (extra.errors) {\n            recordError(error);\n        } else {\n            throw error;\n        }\n    }\n\n    // Expect the next token to match the specified punctuator.\n    // If not, an exception will be thrown.\n\n    function expect(value) {\n        var token = lex();\n        if (token.type !== Token.Punctuator || token.value !== value) {\n            throwUnexpectedToken(token);\n        }\n    }\n\n    /**\n     * @name expectCommaSeparator\n     * @description Quietly expect a comma when in tolerant mode, otherwise delegates\n     * to <code>expect(value)</code>\n     * @since 2.0\n     */\n    function expectCommaSeparator() {\n        var token;\n\n        if (extra.errors) {\n            token = lookahead;\n            if (token.type === Token.Punctuator && token.value === ',') {\n                lex();\n            } else if (token.type === Token.Punctuator && token.value === ';') {\n                lex();\n                tolerateUnexpectedToken(token);\n            } else {\n                tolerateUnexpectedToken(token, Messages.UnexpectedToken);\n            }\n        } else {\n            expect(',');\n        }\n    }\n\n    // Expect the next token to match the specified keyword.\n    // If not, an exception will be thrown.\n\n    function expectKeyword(keyword) {\n        var token = lex();\n        if (token.type !== Token.Keyword || token.value !== keyword) {\n            throwUnexpectedToken(token);\n        }\n    }\n\n    // Return true if the next token matches the specified punctuator.\n\n    function match(value) {\n        return lookahead.type === Token.Punctuator && lookahead.value === value;\n    }\n\n    // Return true if the next token matches the specified keyword\n\n    function matchKeyword(keyword) {\n        return lookahead.type === Token.Keyword && lookahead.value === keyword;\n    }\n\n    // Return true if the next token matches the specified contextual keyword\n    // (where an identifier is sometimes a keyword depending on the context)\n\n    function matchContextualKeyword(keyword) {\n        return lookahead.type === Token.Identifier && lookahead.value === keyword;\n    }\n\n    // Return true if the next token is an assignment operator\n\n    function matchAssign() {\n        var op;\n\n        if (lookahead.type !== Token.Punctuator) {\n            return false;\n        }\n        op = lookahead.value;\n        return op === '=' ||\n            op === '*=' ||\n            op === '/=' ||\n            op === '%=' ||\n            op === '+=' ||\n            op === '-=' ||\n            op === '<<=' ||\n            op === '>>=' ||\n            op === '>>>=' ||\n            op === '&=' ||\n            op === '^=' ||\n            op === '|=';\n    }\n\n    function consumeSemicolon() {\n        // Catch the very common case first: immediately a semicolon (U+003B).\n        if (source.charCodeAt(startIndex) === 0x3B || match(';')) {\n            lex();\n            return;\n        }\n\n        if (hasLineTerminator) {\n            return;\n        }\n\n        // FIXME(ikarienator): this is seemingly an issue in the previous location info convention.\n        lastIndex = startIndex;\n        lastLineNumber = startLineNumber;\n        lastLineStart = startLineStart;\n\n        if (lookahead.type !== Token.EOF && !match('}')) {\n            throwUnexpectedToken(lookahead);\n        }\n    }\n\n    // Cover grammar support.\n    //\n    // When an assignment expression position starts with an left parenthesis, the determination of the type\n    // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead)\n    // or the first comma. This situation also defers the determination of all the expressions nested in the pair.\n    //\n    // There are three productions that can be parsed in a parentheses pair that needs to be determined\n    // after the outermost pair is closed. They are:\n    //\n    //   1. AssignmentExpression\n    //   2. BindingElements\n    //   3. AssignmentTargets\n    //\n    // In order to avoid exponential backtracking, we use two flags to denote if the production can be\n    // binding element or assignment target.\n    //\n    // The three productions have the relationship:\n    //\n    //   BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression\n    //\n    // with a single exception that CoverInitializedName when used directly in an Expression, generates\n    // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the\n    // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair.\n    //\n    // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not\n    // effect the current flags. This means the production the parser parses is only used as an expression. Therefore\n    // the CoverInitializedName check is conducted.\n    //\n    // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates\n    // the flags outside of the parser. This means the production the parser parses is used as a part of a potential\n    // pattern. The CoverInitializedName check is deferred.\n    function isolateCoverGrammar(parser) {\n        var oldIsBindingElement = isBindingElement,\n            oldIsAssignmentTarget = isAssignmentTarget,\n            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,\n            result;\n        isBindingElement = true;\n        isAssignmentTarget = true;\n        firstCoverInitializedNameError = null;\n        result = parser();\n        if (firstCoverInitializedNameError !== null) {\n            throwUnexpectedToken(firstCoverInitializedNameError);\n        }\n        isBindingElement = oldIsBindingElement;\n        isAssignmentTarget = oldIsAssignmentTarget;\n        firstCoverInitializedNameError = oldFirstCoverInitializedNameError;\n        return result;\n    }\n\n    function inheritCoverGrammar(parser) {\n        var oldIsBindingElement = isBindingElement,\n            oldIsAssignmentTarget = isAssignmentTarget,\n            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,\n            result;\n        isBindingElement = true;\n        isAssignmentTarget = true;\n        firstCoverInitializedNameError = null;\n        result = parser();\n        isBindingElement = isBindingElement && oldIsBindingElement;\n        isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget;\n        firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError;\n        return result;\n    }\n\n    // ECMA-262 13.3.3 Destructuring Binding Patterns\n\n    function parseArrayPattern(params, kind) {\n        var node = new Node(), elements = [], rest, restNode;\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else {\n                if (match('...')) {\n                    restNode = new Node();\n                    lex();\n                    params.push(lookahead);\n                    rest = parseVariableIdentifier(kind);\n                    elements.push(restNode.finishRestElement(rest));\n                    break;\n                } else {\n                    elements.push(parsePatternWithDefault(params, kind));\n                }\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n\n        }\n\n        expect(']');\n\n        return node.finishArrayPattern(elements);\n    }\n\n    function parsePropertyPattern(params, kind) {\n        var node = new Node(), key, keyToken, computed = match('['), init;\n        if (lookahead.type === Token.Identifier) {\n            keyToken = lookahead;\n            key = parseVariableIdentifier();\n            if (match('=')) {\n                params.push(keyToken);\n                lex();\n                init = parseAssignmentExpression();\n\n                return node.finishProperty(\n                    'init', key, false,\n                    new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, false);\n            } else if (!match(':')) {\n                params.push(keyToken);\n                return node.finishProperty('init', key, false, key, false, true);\n            }\n        } else {\n            key = parseObjectPropertyKey();\n        }\n        expect(':');\n        init = parsePatternWithDefault(params, kind);\n        return node.finishProperty('init', key, computed, init, false, false);\n    }\n\n    function parseObjectPattern(params, kind) {\n        var node = new Node(), properties = [];\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parsePropertyPattern(params, kind));\n            if (!match('}')) {\n                expect(',');\n            }\n        }\n\n        lex();\n\n        return node.finishObjectPattern(properties);\n    }\n\n    function parsePattern(params, kind) {\n        if (match('[')) {\n            return parseArrayPattern(params, kind);\n        } else if (match('{')) {\n            return parseObjectPattern(params, kind);\n        } else if (matchKeyword('let')) {\n            if (kind === 'const' || kind === 'let') {\n                tolerateUnexpectedToken(lookahead, Messages.UnexpectedToken);\n            }\n        }\n\n        params.push(lookahead);\n        return parseVariableIdentifier(kind);\n    }\n\n    function parsePatternWithDefault(params, kind) {\n        var startToken = lookahead, pattern, previousAllowYield, right;\n        pattern = parsePattern(params, kind);\n        if (match('=')) {\n            lex();\n            previousAllowYield = state.allowYield;\n            state.allowYield = true;\n            right = isolateCoverGrammar(parseAssignmentExpression);\n            state.allowYield = previousAllowYield;\n            pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right);\n        }\n        return pattern;\n    }\n\n    // ECMA-262 12.2.5 Array Initializer\n\n    function parseArrayInitializer() {\n        var elements = [], node = new Node(), restSpread;\n\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else if (match('...')) {\n                restSpread = new Node();\n                lex();\n                restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression));\n\n                if (!match(']')) {\n                    isAssignmentTarget = isBindingElement = false;\n                    expect(',');\n                }\n                elements.push(restSpread);\n            } else {\n                elements.push(inheritCoverGrammar(parseAssignmentExpression));\n\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n        }\n\n        lex();\n\n        return node.finishArrayExpression(elements);\n    }\n\n    // ECMA-262 12.2.6 Object Initializer\n\n    function parsePropertyFunction(node, paramInfo, isGenerator) {\n        var previousStrict, body;\n\n        isAssignmentTarget = isBindingElement = false;\n\n        previousStrict = strict;\n        body = isolateCoverGrammar(parseFunctionSourceElements);\n\n        if (strict && paramInfo.firstRestricted) {\n            tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message);\n        }\n        if (strict && paramInfo.stricted) {\n            tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message);\n        }\n\n        strict = previousStrict;\n        return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator);\n    }\n\n    function parsePropertyMethodFunction() {\n        var params, method, node = new Node(),\n            previousAllowYield = state.allowYield;\n\n        state.allowYield = false;\n        params = parseParams();\n        state.allowYield = previousAllowYield;\n\n        state.allowYield = false;\n        method = parsePropertyFunction(node, params, false);\n        state.allowYield = previousAllowYield;\n\n        return method;\n    }\n\n    function parseObjectPropertyKey() {\n        var token, node = new Node(), expr;\n\n        token = lex();\n\n        // Note: This function is called only from parseObjectProperty(), where\n        // EOF and Punctuator tokens are already filtered out.\n\n        switch (token.type) {\n        case Token.StringLiteral:\n        case Token.NumericLiteral:\n            if (strict && token.octal) {\n                tolerateUnexpectedToken(token, Messages.StrictOctalLiteral);\n            }\n            return node.finishLiteral(token);\n        case Token.Identifier:\n        case Token.BooleanLiteral:\n        case Token.NullLiteral:\n        case Token.Keyword:\n            return node.finishIdentifier(token.value);\n        case Token.Punctuator:\n            if (token.value === '[') {\n                expr = isolateCoverGrammar(parseAssignmentExpression);\n                expect(']');\n                return expr;\n            }\n            break;\n        }\n        throwUnexpectedToken(token);\n    }\n\n    function lookaheadPropertyName() {\n        switch (lookahead.type) {\n        case Token.Identifier:\n        case Token.StringLiteral:\n        case Token.BooleanLiteral:\n        case Token.NullLiteral:\n        case Token.NumericLiteral:\n        case Token.Keyword:\n            return true;\n        case Token.Punctuator:\n            return lookahead.value === '[';\n        }\n        return false;\n    }\n\n    // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals,\n    // it might be called at a position where there is in fact a short hand identifier pattern or a data property.\n    // This can only be determined after we consumed up to the left parentheses.\n    //\n    // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller\n    // is responsible to visit other options.\n    function tryParseMethodDefinition(token, key, computed, node) {\n        var value, options, methodNode, params,\n            previousAllowYield = state.allowYield;\n\n        if (token.type === Token.Identifier) {\n            // check for `get` and `set`;\n\n            if (token.value === 'get' && lookaheadPropertyName()) {\n                computed = match('[');\n                key = parseObjectPropertyKey();\n                methodNode = new Node();\n                expect('(');\n                expect(')');\n\n                state.allowYield = false;\n                value = parsePropertyFunction(methodNode, {\n                    params: [],\n                    defaults: [],\n                    stricted: null,\n                    firstRestricted: null,\n                    message: null\n                }, false);\n                state.allowYield = previousAllowYield;\n\n                return node.finishProperty('get', key, computed, value, false, false);\n            } else if (token.value === 'set' && lookaheadPropertyName()) {\n                computed = match('[');\n                key = parseObjectPropertyKey();\n                methodNode = new Node();\n                expect('(');\n\n                options = {\n                    params: [],\n                    defaultCount: 0,\n                    defaults: [],\n                    firstRestricted: null,\n                    paramSet: {}\n                };\n                if (match(')')) {\n                    tolerateUnexpectedToken(lookahead);\n                } else {\n                    state.allowYield = false;\n                    parseParam(options);\n                    state.allowYield = previousAllowYield;\n                    if (options.defaultCount === 0) {\n                        options.defaults = [];\n                    }\n                }\n                expect(')');\n\n                state.allowYield = false;\n                value = parsePropertyFunction(methodNode, options, false);\n                state.allowYield = previousAllowYield;\n\n                return node.finishProperty('set', key, computed, value, false, false);\n            }\n        } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) {\n            computed = match('[');\n            key = parseObjectPropertyKey();\n            methodNode = new Node();\n\n            state.allowYield = true;\n            params = parseParams();\n            state.allowYield = previousAllowYield;\n\n            state.allowYield = false;\n            value = parsePropertyFunction(methodNode, params, true);\n            state.allowYield = previousAllowYield;\n\n            return node.finishProperty('init', key, computed, value, true, false);\n        }\n\n        if (key && match('(')) {\n            value = parsePropertyMethodFunction();\n            return node.finishProperty('init', key, computed, value, true, false);\n        }\n\n        // Not a MethodDefinition.\n        return null;\n    }\n\n    function parseObjectProperty(hasProto) {\n        var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value;\n\n        computed = match('[');\n        if (match('*')) {\n            lex();\n        } else {\n            key = parseObjectPropertyKey();\n        }\n        maybeMethod = tryParseMethodDefinition(token, key, computed, node);\n        if (maybeMethod) {\n            return maybeMethod;\n        }\n\n        if (!key) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        // Check for duplicated __proto__\n        if (!computed) {\n            proto = (key.type === Syntax.Identifier && key.name === '__proto__') ||\n                (key.type === Syntax.Literal && key.value === '__proto__');\n            if (hasProto.value && proto) {\n                tolerateError(Messages.DuplicateProtoProperty);\n            }\n            hasProto.value |= proto;\n        }\n\n        if (match(':')) {\n            lex();\n            value = inheritCoverGrammar(parseAssignmentExpression);\n            return node.finishProperty('init', key, computed, value, false, false);\n        }\n\n        if (token.type === Token.Identifier) {\n            if (match('=')) {\n                firstCoverInitializedNameError = lookahead;\n                lex();\n                value = isolateCoverGrammar(parseAssignmentExpression);\n                return node.finishProperty('init', key, computed,\n                    new WrappingNode(token).finishAssignmentPattern(key, value), false, true);\n            }\n            return node.finishProperty('init', key, computed, key, false, true);\n        }\n\n        throwUnexpectedToken(lookahead);\n    }\n\n    function parseObjectInitializer() {\n        var properties = [], hasProto = {value: false}, node = new Node();\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parseObjectProperty(hasProto));\n\n            if (!match('}')) {\n                expectCommaSeparator();\n            }\n        }\n\n        expect('}');\n\n        return node.finishObjectExpression(properties);\n    }\n\n    function reinterpretExpressionAsPattern(expr) {\n        var i;\n        switch (expr.type) {\n        case Syntax.Identifier:\n        case Syntax.MemberExpression:\n        case Syntax.RestElement:\n        case Syntax.AssignmentPattern:\n            break;\n        case Syntax.SpreadElement:\n            expr.type = Syntax.RestElement;\n            reinterpretExpressionAsPattern(expr.argument);\n            break;\n        case Syntax.ArrayExpression:\n            expr.type = Syntax.ArrayPattern;\n            for (i = 0; i < expr.elements.length; i++) {\n                if (expr.elements[i] !== null) {\n                    reinterpretExpressionAsPattern(expr.elements[i]);\n                }\n            }\n            break;\n        case Syntax.ObjectExpression:\n            expr.type = Syntax.ObjectPattern;\n            for (i = 0; i < expr.properties.length; i++) {\n                reinterpretExpressionAsPattern(expr.properties[i].value);\n            }\n            break;\n        case Syntax.AssignmentExpression:\n            expr.type = Syntax.AssignmentPattern;\n            reinterpretExpressionAsPattern(expr.left);\n            break;\n        default:\n            // Allow other node type for tolerant parsing.\n            break;\n        }\n    }\n\n    // ECMA-262 12.2.9 Template Literals\n\n    function parseTemplateElement(option) {\n        var node, token;\n\n        if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) {\n            throwUnexpectedToken();\n        }\n\n        node = new Node();\n        token = lex();\n\n        return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail);\n    }\n\n    function parseTemplateLiteral() {\n        var quasi, quasis, expressions, node = new Node();\n\n        quasi = parseTemplateElement({ head: true });\n        quasis = [quasi];\n        expressions = [];\n\n        while (!quasi.tail) {\n            expressions.push(parseExpression());\n            quasi = parseTemplateElement({ head: false });\n            quasis.push(quasi);\n        }\n\n        return node.finishTemplateLiteral(quasis, expressions);\n    }\n\n    // ECMA-262 12.2.10 The Grouping Operator\n\n    function parseGroupExpression() {\n        var expr, expressions, startToken, i, params = [];\n\n        expect('(');\n\n        if (match(')')) {\n            lex();\n            if (!match('=>')) {\n                expect('=>');\n            }\n            return {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: [],\n                rawParams: []\n            };\n        }\n\n        startToken = lookahead;\n        if (match('...')) {\n            expr = parseRestElement(params);\n            expect(')');\n            if (!match('=>')) {\n                expect('=>');\n            }\n            return {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: [expr]\n            };\n        }\n\n        isBindingElement = true;\n        expr = inheritCoverGrammar(parseAssignmentExpression);\n\n        if (match(',')) {\n            isAssignmentTarget = false;\n            expressions = [expr];\n\n            while (startIndex < length) {\n                if (!match(',')) {\n                    break;\n                }\n                lex();\n\n                if (match('...')) {\n                    if (!isBindingElement) {\n                        throwUnexpectedToken(lookahead);\n                    }\n                    expressions.push(parseRestElement(params));\n                    expect(')');\n                    if (!match('=>')) {\n                        expect('=>');\n                    }\n                    isBindingElement = false;\n                    for (i = 0; i < expressions.length; i++) {\n                        reinterpretExpressionAsPattern(expressions[i]);\n                    }\n                    return {\n                        type: PlaceHolders.ArrowParameterPlaceHolder,\n                        params: expressions\n                    };\n                }\n\n                expressions.push(inheritCoverGrammar(parseAssignmentExpression));\n            }\n\n            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);\n        }\n\n\n        expect(')');\n\n        if (match('=>')) {\n            if (expr.type === Syntax.Identifier && expr.name === 'yield') {\n                return {\n                    type: PlaceHolders.ArrowParameterPlaceHolder,\n                    params: [expr]\n                };\n            }\n\n            if (!isBindingElement) {\n                throwUnexpectedToken(lookahead);\n            }\n\n            if (expr.type === Syntax.SequenceExpression) {\n                for (i = 0; i < expr.expressions.length; i++) {\n                    reinterpretExpressionAsPattern(expr.expressions[i]);\n                }\n            } else {\n                reinterpretExpressionAsPattern(expr);\n            }\n\n            expr = {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr]\n            };\n        }\n        isBindingElement = false;\n        return expr;\n    }\n\n\n    // ECMA-262 12.2 Primary Expressions\n\n    function parsePrimaryExpression() {\n        var type, token, expr, node;\n\n        if (match('(')) {\n            isBindingElement = false;\n            return inheritCoverGrammar(parseGroupExpression);\n        }\n\n        if (match('[')) {\n            return inheritCoverGrammar(parseArrayInitializer);\n        }\n\n        if (match('{')) {\n            return inheritCoverGrammar(parseObjectInitializer);\n        }\n\n        type = lookahead.type;\n        node = new Node();\n\n        if (type === Token.Identifier) {\n            if (state.sourceType === 'module' && lookahead.value === 'await') {\n                tolerateUnexpectedToken(lookahead);\n            }\n            expr = node.finishIdentifier(lex().value);\n        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            if (strict && lookahead.octal) {\n                tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral);\n            }\n            expr = node.finishLiteral(lex());\n        } else if (type === Token.Keyword) {\n            if (!strict && state.allowYield && matchKeyword('yield')) {\n                return parseNonComputedProperty();\n            }\n            isAssignmentTarget = isBindingElement = false;\n            if (matchKeyword('function')) {\n                return parseFunctionExpression();\n            }\n            if (matchKeyword('this')) {\n                lex();\n                return node.finishThisExpression();\n            }\n            if (matchKeyword('class')) {\n                return parseClassExpression();\n            }\n            if (!strict && matchKeyword('let')) {\n                return node.finishIdentifier(lex().value);\n            }\n            throwUnexpectedToken(lex());\n        } else if (type === Token.BooleanLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            token = lex();\n            token.value = (token.value === 'true');\n            expr = node.finishLiteral(token);\n        } else if (type === Token.NullLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            token = lex();\n            token.value = null;\n            expr = node.finishLiteral(token);\n        } else if (match('/') || match('/=')) {\n            isAssignmentTarget = isBindingElement = false;\n            index = startIndex;\n\n            if (typeof extra.tokens !== 'undefined') {\n                token = collectRegex();\n            } else {\n                token = scanRegExp();\n            }\n            lex();\n            expr = node.finishLiteral(token);\n        } else if (type === Token.Template) {\n            expr = parseTemplateLiteral();\n        } else {\n            throwUnexpectedToken(lex());\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.3 Left-Hand-Side Expressions\n\n    function parseArguments() {\n        var args = [], expr;\n\n        expect('(');\n\n        if (!match(')')) {\n            while (startIndex < length) {\n                if (match('...')) {\n                    expr = new Node();\n                    lex();\n                    expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression));\n                } else {\n                    expr = isolateCoverGrammar(parseAssignmentExpression);\n                }\n                args.push(expr);\n                if (match(')')) {\n                    break;\n                }\n                expectCommaSeparator();\n            }\n        }\n\n        expect(')');\n\n        return args;\n    }\n\n    function parseNonComputedProperty() {\n        var token, node = new Node();\n\n        token = lex();\n\n        if (!isIdentifierName(token)) {\n            throwUnexpectedToken(token);\n        }\n\n        return node.finishIdentifier(token.value);\n    }\n\n    function parseNonComputedMember() {\n        expect('.');\n\n        return parseNonComputedProperty();\n    }\n\n    function parseComputedMember() {\n        var expr;\n\n        expect('[');\n\n        expr = isolateCoverGrammar(parseExpression);\n\n        expect(']');\n\n        return expr;\n    }\n\n    // ECMA-262 12.3.3 The new Operator\n\n    function parseNewExpression() {\n        var callee, args, node = new Node();\n\n        expectKeyword('new');\n\n        if (match('.')) {\n            lex();\n            if (lookahead.type === Token.Identifier && lookahead.value === 'target') {\n                if (state.inFunctionBody) {\n                    lex();\n                    return node.finishMetaProperty('new', 'target');\n                }\n            }\n            throwUnexpectedToken(lookahead);\n        }\n\n        callee = isolateCoverGrammar(parseLeftHandSideExpression);\n        args = match('(') ? parseArguments() : [];\n\n        isAssignmentTarget = isBindingElement = false;\n\n        return node.finishNewExpression(callee, args);\n    }\n\n    // ECMA-262 12.3.4 Function Calls\n\n    function parseLeftHandSideExpressionAllowCall() {\n        var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn;\n\n        startToken = lookahead;\n        state.allowIn = true;\n\n        if (matchKeyword('super') && state.inFunctionBody) {\n            expr = new Node();\n            lex();\n            expr = expr.finishSuper();\n            if (!match('(') && !match('.') && !match('[')) {\n                throwUnexpectedToken(lookahead);\n            }\n        } else {\n            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);\n        }\n\n        for (;;) {\n            if (match('.')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseNonComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);\n            } else if (match('(')) {\n                isBindingElement = false;\n                isAssignmentTarget = false;\n                args = parseArguments();\n                expr = new WrappingNode(startToken).finishCallExpression(expr, args);\n            } else if (match('[')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);\n            } else if (lookahead.type === Token.Template && lookahead.head) {\n                quasi = parseTemplateLiteral();\n                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);\n            } else {\n                break;\n            }\n        }\n        state.allowIn = previousAllowIn;\n\n        return expr;\n    }\n\n    // ECMA-262 12.3 Left-Hand-Side Expressions\n\n    function parseLeftHandSideExpression() {\n        var quasi, expr, property, startToken;\n        assert(state.allowIn, 'callee of new expression always allow in keyword.');\n\n        startToken = lookahead;\n\n        if (matchKeyword('super') && state.inFunctionBody) {\n            expr = new Node();\n            lex();\n            expr = expr.finishSuper();\n            if (!match('[') && !match('.')) {\n                throwUnexpectedToken(lookahead);\n            }\n        } else {\n            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);\n        }\n\n        for (;;) {\n            if (match('[')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);\n            } else if (match('.')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseNonComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);\n            } else if (lookahead.type === Token.Template && lookahead.head) {\n                quasi = parseTemplateLiteral();\n                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);\n            } else {\n                break;\n            }\n        }\n        return expr;\n    }\n\n    // ECMA-262 12.4 Postfix Expressions\n\n    function parsePostfixExpression() {\n        var expr, token, startToken = lookahead;\n\n        expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall);\n\n        if (!hasLineTerminator && lookahead.type === Token.Punctuator) {\n            if (match('++') || match('--')) {\n                // ECMA-262 11.3.1, 11.3.2\n                if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {\n                    tolerateError(Messages.StrictLHSPostfix);\n                }\n\n                if (!isAssignmentTarget) {\n                    tolerateError(Messages.InvalidLHSInAssignment);\n                }\n\n                isAssignmentTarget = isBindingElement = false;\n\n                token = lex();\n                expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr);\n            }\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.5 Unary Operators\n\n    function parseUnaryExpression() {\n        var token, expr, startToken;\n\n        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {\n            expr = parsePostfixExpression();\n        } else if (match('++') || match('--')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            // ECMA-262 11.4.4, 11.4.5\n            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {\n                tolerateError(Messages.StrictLHSPrefix);\n            }\n\n            if (!isAssignmentTarget) {\n                tolerateError(Messages.InvalidLHSInAssignment);\n            }\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            isAssignmentTarget = isBindingElement = false;\n        } else if (match('+') || match('-') || match('~') || match('!')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            isAssignmentTarget = isBindingElement = false;\n        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) {\n                tolerateError(Messages.StrictDelete);\n            }\n            isAssignmentTarget = isBindingElement = false;\n        } else {\n            expr = parsePostfixExpression();\n        }\n\n        return expr;\n    }\n\n    function binaryPrecedence(token, allowIn) {\n        var prec = 0;\n\n        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {\n            return 0;\n        }\n\n        switch (token.value) {\n        case '||':\n            prec = 1;\n            break;\n\n        case '&&':\n            prec = 2;\n            break;\n\n        case '|':\n            prec = 3;\n            break;\n\n        case '^':\n            prec = 4;\n            break;\n\n        case '&':\n            prec = 5;\n            break;\n\n        case '==':\n        case '!=':\n        case '===':\n        case '!==':\n            prec = 6;\n            break;\n\n        case '<':\n        case '>':\n        case '<=':\n        case '>=':\n        case 'instanceof':\n            prec = 7;\n            break;\n\n        case 'in':\n            prec = allowIn ? 7 : 0;\n            break;\n\n        case '<<':\n        case '>>':\n        case '>>>':\n            prec = 8;\n            break;\n\n        case '+':\n        case '-':\n            prec = 9;\n            break;\n\n        case '*':\n        case '/':\n        case '%':\n            prec = 11;\n            break;\n\n        default:\n            break;\n        }\n\n        return prec;\n    }\n\n    // ECMA-262 12.6 Multiplicative Operators\n    // ECMA-262 12.7 Additive Operators\n    // ECMA-262 12.8 Bitwise Shift Operators\n    // ECMA-262 12.9 Relational Operators\n    // ECMA-262 12.10 Equality Operators\n    // ECMA-262 12.11 Binary Bitwise Operators\n    // ECMA-262 12.12 Binary Logical Operators\n\n    function parseBinaryExpression() {\n        var marker, markers, expr, token, prec, stack, right, operator, left, i;\n\n        marker = lookahead;\n        left = inheritCoverGrammar(parseUnaryExpression);\n\n        token = lookahead;\n        prec = binaryPrecedence(token, state.allowIn);\n        if (prec === 0) {\n            return left;\n        }\n        isAssignmentTarget = isBindingElement = false;\n        token.prec = prec;\n        lex();\n\n        markers = [marker, lookahead];\n        right = isolateCoverGrammar(parseUnaryExpression);\n\n        stack = [left, token, right];\n\n        while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) {\n\n            // Reduce: make a binary expression from the three topmost entries.\n            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {\n                right = stack.pop();\n                operator = stack.pop().value;\n                left = stack.pop();\n                markers.pop();\n                expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right);\n                stack.push(expr);\n            }\n\n            // Shift.\n            token = lex();\n            token.prec = prec;\n            stack.push(token);\n            markers.push(lookahead);\n            expr = isolateCoverGrammar(parseUnaryExpression);\n            stack.push(expr);\n        }\n\n        // Final reduce to clean-up the stack.\n        i = stack.length - 1;\n        expr = stack[i];\n        markers.pop();\n        while (i > 1) {\n            expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr);\n            i -= 2;\n        }\n\n        return expr;\n    }\n\n\n    // ECMA-262 12.13 Conditional Operator\n\n    function parseConditionalExpression() {\n        var expr, previousAllowIn, consequent, alternate, startToken;\n\n        startToken = lookahead;\n\n        expr = inheritCoverGrammar(parseBinaryExpression);\n        if (match('?')) {\n            lex();\n            previousAllowIn = state.allowIn;\n            state.allowIn = true;\n            consequent = isolateCoverGrammar(parseAssignmentExpression);\n            state.allowIn = previousAllowIn;\n            expect(':');\n            alternate = isolateCoverGrammar(parseAssignmentExpression);\n\n            expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate);\n            isAssignmentTarget = isBindingElement = false;\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 14.2 Arrow Function Definitions\n\n    function parseConciseBody() {\n        if (match('{')) {\n            return parseFunctionSourceElements();\n        }\n        return isolateCoverGrammar(parseAssignmentExpression);\n    }\n\n    function checkPatternParam(options, param) {\n        var i;\n        switch (param.type) {\n        case Syntax.Identifier:\n            validateParam(options, param, param.name);\n            break;\n        case Syntax.RestElement:\n            checkPatternParam(options, param.argument);\n            break;\n        case Syntax.AssignmentPattern:\n            checkPatternParam(options, param.left);\n            break;\n        case Syntax.ArrayPattern:\n            for (i = 0; i < param.elements.length; i++) {\n                if (param.elements[i] !== null) {\n                    checkPatternParam(options, param.elements[i]);\n                }\n            }\n            break;\n        case Syntax.YieldExpression:\n            break;\n        default:\n            assert(param.type === Syntax.ObjectPattern, 'Invalid type');\n            for (i = 0; i < param.properties.length; i++) {\n                checkPatternParam(options, param.properties[i].value);\n            }\n            break;\n        }\n    }\n    function reinterpretAsCoverFormalsList(expr) {\n        var i, len, param, params, defaults, defaultCount, options, token;\n\n        defaults = [];\n        defaultCount = 0;\n        params = [expr];\n\n        switch (expr.type) {\n        case Syntax.Identifier:\n            break;\n        case PlaceHolders.ArrowParameterPlaceHolder:\n            params = expr.params;\n            break;\n        default:\n            return null;\n        }\n\n        options = {\n            paramSet: {}\n        };\n\n        for (i = 0, len = params.length; i < len; i += 1) {\n            param = params[i];\n            switch (param.type) {\n            case Syntax.AssignmentPattern:\n                params[i] = param.left;\n                if (param.right.type === Syntax.YieldExpression) {\n                    if (param.right.argument) {\n                        throwUnexpectedToken(lookahead);\n                    }\n                    param.right.type = Syntax.Identifier;\n                    param.right.name = 'yield';\n                    delete param.right.argument;\n                    delete param.right.delegate;\n                }\n                defaults.push(param.right);\n                ++defaultCount;\n                checkPatternParam(options, param.left);\n                break;\n            default:\n                checkPatternParam(options, param);\n                params[i] = param;\n                defaults.push(null);\n                break;\n            }\n        }\n\n        if (strict || !state.allowYield) {\n            for (i = 0, len = params.length; i < len; i += 1) {\n                param = params[i];\n                if (param.type === Syntax.YieldExpression) {\n                    throwUnexpectedToken(lookahead);\n                }\n            }\n        }\n\n        if (options.message === Messages.StrictParamDupe) {\n            token = strict ? options.stricted : options.firstRestricted;\n            throwUnexpectedToken(token, options.message);\n        }\n\n        if (defaultCount === 0) {\n            defaults = [];\n        }\n\n        return {\n            params: params,\n            defaults: defaults,\n            stricted: options.stricted,\n            firstRestricted: options.firstRestricted,\n            message: options.message\n        };\n    }\n\n    function parseArrowFunctionExpression(options, node) {\n        var previousStrict, previousAllowYield, body;\n\n        if (hasLineTerminator) {\n            tolerateUnexpectedToken(lookahead);\n        }\n        expect('=>');\n\n        previousStrict = strict;\n        previousAllowYield = state.allowYield;\n        state.allowYield = true;\n\n        body = parseConciseBody();\n\n        if (strict && options.firstRestricted) {\n            throwUnexpectedToken(options.firstRestricted, options.message);\n        }\n        if (strict && options.stricted) {\n            tolerateUnexpectedToken(options.stricted, options.message);\n        }\n\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement);\n    }\n\n    // ECMA-262 14.4 Yield expression\n\n    function parseYieldExpression() {\n        var argument, expr, delegate, previousAllowYield;\n\n        argument = null;\n        expr = new Node();\n\n        expectKeyword('yield');\n\n        if (!hasLineTerminator) {\n            previousAllowYield = state.allowYield;\n            state.allowYield = false;\n            delegate = match('*');\n            if (delegate) {\n                lex();\n                argument = parseAssignmentExpression();\n            } else {\n                if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) {\n                    argument = parseAssignmentExpression();\n                }\n            }\n            state.allowYield = previousAllowYield;\n        }\n\n        return expr.finishYieldExpression(argument, delegate);\n    }\n\n    // ECMA-262 12.14 Assignment Operators\n\n    function parseAssignmentExpression() {\n        var token, expr, right, list, startToken;\n\n        startToken = lookahead;\n        token = lookahead;\n\n        if (!state.allowYield && matchKeyword('yield')) {\n            return parseYieldExpression();\n        }\n\n        expr = parseConditionalExpression();\n\n        if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) {\n            isAssignmentTarget = isBindingElement = false;\n            list = reinterpretAsCoverFormalsList(expr);\n\n            if (list) {\n                firstCoverInitializedNameError = null;\n                return parseArrowFunctionExpression(list, new WrappingNode(startToken));\n            }\n\n            return expr;\n        }\n\n        if (matchAssign()) {\n            if (!isAssignmentTarget) {\n                tolerateError(Messages.InvalidLHSInAssignment);\n            }\n\n            // ECMA-262 12.1.1\n            if (strict && expr.type === Syntax.Identifier) {\n                if (isRestrictedWord(expr.name)) {\n                    tolerateUnexpectedToken(token, Messages.StrictLHSAssignment);\n                }\n                if (isStrictModeReservedWord(expr.name)) {\n                    tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n                }\n            }\n\n            if (!match('=')) {\n                isAssignmentTarget = isBindingElement = false;\n            } else {\n                reinterpretExpressionAsPattern(expr);\n            }\n\n            token = lex();\n            right = isolateCoverGrammar(parseAssignmentExpression);\n            expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right);\n            firstCoverInitializedNameError = null;\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.15 Comma Operator\n\n    function parseExpression() {\n        var expr, startToken = lookahead, expressions;\n\n        expr = isolateCoverGrammar(parseAssignmentExpression);\n\n        if (match(',')) {\n            expressions = [expr];\n\n            while (startIndex < length) {\n                if (!match(',')) {\n                    break;\n                }\n                lex();\n                expressions.push(isolateCoverGrammar(parseAssignmentExpression));\n            }\n\n            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 13.2 Block\n\n    function parseStatementListItem() {\n        if (lookahead.type === Token.Keyword) {\n            switch (lookahead.value) {\n            case 'export':\n                if (state.sourceType !== 'module') {\n                    tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration);\n                }\n                return parseExportDeclaration();\n            case 'import':\n                if (state.sourceType !== 'module') {\n                    tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration);\n                }\n                return parseImportDeclaration();\n            case 'const':\n                return parseLexicalDeclaration({inFor: false});\n            case 'function':\n                return parseFunctionDeclaration(new Node());\n            case 'class':\n                return parseClassDeclaration();\n            }\n        }\n\n        if (matchKeyword('let') && isLexicalDeclaration()) {\n            return parseLexicalDeclaration({inFor: false});\n        }\n\n        return parseStatement();\n    }\n\n    function parseStatementList() {\n        var list = [];\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            list.push(parseStatementListItem());\n        }\n\n        return list;\n    }\n\n    function parseBlock() {\n        var block, node = new Node();\n\n        expect('{');\n\n        block = parseStatementList();\n\n        expect('}');\n\n        return node.finishBlockStatement(block);\n    }\n\n    // ECMA-262 13.3.2 Variable Statement\n\n    function parseVariableIdentifier(kind) {\n        var token, node = new Node();\n\n        token = lex();\n\n        if (token.type === Token.Keyword && token.value === 'yield') {\n            if (strict) {\n                tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n            } if (!state.allowYield) {\n                throwUnexpectedToken(token);\n            }\n        } else if (token.type !== Token.Identifier) {\n            if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) {\n                tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n            } else {\n                if (strict || token.value !== 'let' || kind !== 'var') {\n                    throwUnexpectedToken(token);\n                }\n            }\n        } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') {\n            tolerateUnexpectedToken(token);\n        }\n\n        return node.finishIdentifier(token.value);\n    }\n\n    function parseVariableDeclaration(options) {\n        var init = null, id, node = new Node(), params = [];\n\n        id = parsePattern(params, 'var');\n\n        // ECMA-262 12.2.1\n        if (strict && isRestrictedWord(id.name)) {\n            tolerateError(Messages.StrictVarName);\n        }\n\n        if (match('=')) {\n            lex();\n            init = isolateCoverGrammar(parseAssignmentExpression);\n        } else if (id.type !== Syntax.Identifier && !options.inFor) {\n            expect('=');\n        }\n\n        return node.finishVariableDeclarator(id, init);\n    }\n\n    function parseVariableDeclarationList(options) {\n        var list = [];\n\n        do {\n            list.push(parseVariableDeclaration({ inFor: options.inFor }));\n            if (!match(',')) {\n                break;\n            }\n            lex();\n        } while (startIndex < length);\n\n        return list;\n    }\n\n    function parseVariableStatement(node) {\n        var declarations;\n\n        expectKeyword('var');\n\n        declarations = parseVariableDeclarationList({ inFor: false });\n\n        consumeSemicolon();\n\n        return node.finishVariableDeclaration(declarations);\n    }\n\n    // ECMA-262 13.3.1 Let and Const Declarations\n\n    function parseLexicalBinding(kind, options) {\n        var init = null, id, node = new Node(), params = [];\n\n        id = parsePattern(params, kind);\n\n        // ECMA-262 12.2.1\n        if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) {\n            tolerateError(Messages.StrictVarName);\n        }\n\n        if (kind === 'const') {\n            if (!matchKeyword('in') && !matchContextualKeyword('of')) {\n                expect('=');\n                init = isolateCoverGrammar(parseAssignmentExpression);\n            }\n        } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) {\n            expect('=');\n            init = isolateCoverGrammar(parseAssignmentExpression);\n        }\n\n        return node.finishVariableDeclarator(id, init);\n    }\n\n    function parseBindingList(kind, options) {\n        var list = [];\n\n        do {\n            list.push(parseLexicalBinding(kind, options));\n            if (!match(',')) {\n                break;\n            }\n            lex();\n        } while (startIndex < length);\n\n        return list;\n    }\n\n\n    function tokenizerState() {\n        return {\n            index: index,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            hasLineTerminator: hasLineTerminator,\n            lastIndex: lastIndex,\n            lastLineNumber: lastLineNumber,\n            lastLineStart: lastLineStart,\n            startIndex: startIndex,\n            startLineNumber: startLineNumber,\n            startLineStart: startLineStart,\n            lookahead: lookahead,\n            tokenCount: extra.tokens ? extra.tokens.length : 0\n        };\n    }\n\n    function resetTokenizerState(ts) {\n        index = ts.index;\n        lineNumber = ts.lineNumber;\n        lineStart = ts.lineStart;\n        hasLineTerminator = ts.hasLineTerminator;\n        lastIndex = ts.lastIndex;\n        lastLineNumber = ts.lastLineNumber;\n        lastLineStart = ts.lastLineStart;\n        startIndex = ts.startIndex;\n        startLineNumber = ts.startLineNumber;\n        startLineStart = ts.startLineStart;\n        lookahead = ts.lookahead;\n        if (extra.tokens) {\n            extra.tokens.splice(ts.tokenCount, extra.tokens.length);\n        }\n    }\n\n    function isLexicalDeclaration() {\n        var lexical, ts;\n\n        ts = tokenizerState();\n\n        lex();\n        lexical = (lookahead.type === Token.Identifier) || match('[') || match('{') ||\n            matchKeyword('let') || matchKeyword('yield');\n\n        resetTokenizerState(ts);\n\n        return lexical;\n    }\n\n    function parseLexicalDeclaration(options) {\n        var kind, declarations, node = new Node();\n\n        kind = lex().value;\n        assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const');\n\n        declarations = parseBindingList(kind, options);\n\n        consumeSemicolon();\n\n        return node.finishLexicalDeclaration(declarations, kind);\n    }\n\n    function parseRestElement(params) {\n        var param, node = new Node();\n\n        lex();\n\n        if (match('{')) {\n            throwError(Messages.ObjectPatternAsRestParameter);\n        }\n\n        params.push(lookahead);\n\n        param = parseVariableIdentifier();\n\n        if (match('=')) {\n            throwError(Messages.DefaultRestParameter);\n        }\n\n        if (!match(')')) {\n            throwError(Messages.ParameterAfterRestParameter);\n        }\n\n        return node.finishRestElement(param);\n    }\n\n    // ECMA-262 13.4 Empty Statement\n\n    function parseEmptyStatement(node) {\n        expect(';');\n        return node.finishEmptyStatement();\n    }\n\n    // ECMA-262 12.4 Expression Statement\n\n    function parseExpressionStatement(node) {\n        var expr = parseExpression();\n        consumeSemicolon();\n        return node.finishExpressionStatement(expr);\n    }\n\n    // ECMA-262 13.6 If statement\n\n    function parseIfStatement(node) {\n        var test, consequent, alternate;\n\n        expectKeyword('if');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        consequent = parseStatement();\n\n        if (matchKeyword('else')) {\n            lex();\n            alternate = parseStatement();\n        } else {\n            alternate = null;\n        }\n\n        return node.finishIfStatement(test, consequent, alternate);\n    }\n\n    // ECMA-262 13.7 Iteration Statements\n\n    function parseDoWhileStatement(node) {\n        var body, test, oldInIteration;\n\n        expectKeyword('do');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = parseStatement();\n\n        state.inIteration = oldInIteration;\n\n        expectKeyword('while');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        if (match(';')) {\n            lex();\n        }\n\n        return node.finishDoWhileStatement(body, test);\n    }\n\n    function parseWhileStatement(node) {\n        var test, body, oldInIteration;\n\n        expectKeyword('while');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = parseStatement();\n\n        state.inIteration = oldInIteration;\n\n        return node.finishWhileStatement(test, body);\n    }\n\n    function parseForStatement(node) {\n        var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations,\n            body, oldInIteration, previousAllowIn = state.allowIn;\n\n        init = test = update = null;\n        forIn = true;\n\n        expectKeyword('for');\n\n        expect('(');\n\n        if (match(';')) {\n            lex();\n        } else {\n            if (matchKeyword('var')) {\n                init = new Node();\n                lex();\n\n                state.allowIn = false;\n                declarations = parseVariableDeclarationList({ inFor: true });\n                state.allowIn = previousAllowIn;\n\n                if (declarations.length === 1 && matchKeyword('in')) {\n                    init = init.finishVariableDeclaration(declarations);\n                    lex();\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {\n                    init = init.finishVariableDeclaration(declarations);\n                    lex();\n                    left = init;\n                    right = parseAssignmentExpression();\n                    init = null;\n                    forIn = false;\n                } else {\n                    init = init.finishVariableDeclaration(declarations);\n                    expect(';');\n                }\n            } else if (matchKeyword('const') || matchKeyword('let')) {\n                init = new Node();\n                kind = lex().value;\n\n                if (!strict && lookahead.value === 'in') {\n                    init = init.finishIdentifier(kind);\n                    lex();\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else {\n                    state.allowIn = false;\n                    declarations = parseBindingList(kind, {inFor: true});\n                    state.allowIn = previousAllowIn;\n\n                    if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) {\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                        lex();\n                        left = init;\n                        right = parseExpression();\n                        init = null;\n                    } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                        lex();\n                        left = init;\n                        right = parseAssignmentExpression();\n                        init = null;\n                        forIn = false;\n                    } else {\n                        consumeSemicolon();\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                    }\n                }\n            } else {\n                initStartToken = lookahead;\n                state.allowIn = false;\n                init = inheritCoverGrammar(parseAssignmentExpression);\n                state.allowIn = previousAllowIn;\n\n                if (matchKeyword('in')) {\n                    if (!isAssignmentTarget) {\n                        tolerateError(Messages.InvalidLHSInForIn);\n                    }\n\n                    lex();\n                    reinterpretExpressionAsPattern(init);\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else if (matchContextualKeyword('of')) {\n                    if (!isAssignmentTarget) {\n                        tolerateError(Messages.InvalidLHSInForLoop);\n                    }\n\n                    lex();\n                    reinterpretExpressionAsPattern(init);\n                    left = init;\n                    right = parseAssignmentExpression();\n                    init = null;\n                    forIn = false;\n                } else {\n                    if (match(',')) {\n                        initSeq = [init];\n                        while (match(',')) {\n                            lex();\n                            initSeq.push(isolateCoverGrammar(parseAssignmentExpression));\n                        }\n                        init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq);\n                    }\n                    expect(';');\n                }\n            }\n        }\n\n        if (typeof left === 'undefined') {\n\n            if (!match(';')) {\n                test = parseExpression();\n            }\n            expect(';');\n\n            if (!match(')')) {\n                update = parseExpression();\n            }\n        }\n\n        expect(')');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = isolateCoverGrammar(parseStatement);\n\n        state.inIteration = oldInIteration;\n\n        return (typeof left === 'undefined') ?\n                node.finishForStatement(init, test, update, body) :\n                forIn ? node.finishForInStatement(left, right, body) :\n                    node.finishForOfStatement(left, right, body);\n    }\n\n    // ECMA-262 13.8 The continue statement\n\n    function parseContinueStatement(node) {\n        var label = null, key;\n\n        expectKeyword('continue');\n\n        // Optimize the most common form: 'continue;'.\n        if (source.charCodeAt(startIndex) === 0x3B) {\n            lex();\n\n            if (!state.inIteration) {\n                throwError(Messages.IllegalContinue);\n            }\n\n            return node.finishContinueStatement(null);\n        }\n\n        if (hasLineTerminator) {\n            if (!state.inIteration) {\n                throwError(Messages.IllegalContinue);\n            }\n\n            return node.finishContinueStatement(null);\n        }\n\n        if (lookahead.type === Token.Identifier) {\n            label = parseVariableIdentifier();\n\n            key = '$' + label.name;\n            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.UnknownLabel, label.name);\n            }\n        }\n\n        consumeSemicolon();\n\n        if (label === null && !state.inIteration) {\n            throwError(Messages.IllegalContinue);\n        }\n\n        return node.finishContinueStatement(label);\n    }\n\n    // ECMA-262 13.9 The break statement\n\n    function parseBreakStatement(node) {\n        var label = null, key;\n\n        expectKeyword('break');\n\n        // Catch the very common case first: immediately a semicolon (U+003B).\n        if (source.charCodeAt(lastIndex) === 0x3B) {\n            lex();\n\n            if (!(state.inIteration || state.inSwitch)) {\n                throwError(Messages.IllegalBreak);\n            }\n\n            return node.finishBreakStatement(null);\n        }\n\n        if (hasLineTerminator) {\n            if (!(state.inIteration || state.inSwitch)) {\n                throwError(Messages.IllegalBreak);\n            }\n        } else if (lookahead.type === Token.Identifier) {\n            label = parseVariableIdentifier();\n\n            key = '$' + label.name;\n            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.UnknownLabel, label.name);\n            }\n        }\n\n        consumeSemicolon();\n\n        if (label === null && !(state.inIteration || state.inSwitch)) {\n            throwError(Messages.IllegalBreak);\n        }\n\n        return node.finishBreakStatement(label);\n    }\n\n    // ECMA-262 13.10 The return statement\n\n    function parseReturnStatement(node) {\n        var argument = null;\n\n        expectKeyword('return');\n\n        if (!state.inFunctionBody) {\n            tolerateError(Messages.IllegalReturn);\n        }\n\n        // 'return' followed by a space and an identifier is very common.\n        if (source.charCodeAt(lastIndex) === 0x20) {\n            if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) {\n                argument = parseExpression();\n                consumeSemicolon();\n                return node.finishReturnStatement(argument);\n            }\n        }\n\n        if (hasLineTerminator) {\n            // HACK\n            return node.finishReturnStatement(null);\n        }\n\n        if (!match(';')) {\n            if (!match('}') && lookahead.type !== Token.EOF) {\n                argument = parseExpression();\n            }\n        }\n\n        consumeSemicolon();\n\n        return node.finishReturnStatement(argument);\n    }\n\n    // ECMA-262 13.11 The with statement\n\n    function parseWithStatement(node) {\n        var object, body;\n\n        if (strict) {\n            tolerateError(Messages.StrictModeWith);\n        }\n\n        expectKeyword('with');\n\n        expect('(');\n\n        object = parseExpression();\n\n        expect(')');\n\n        body = parseStatement();\n\n        return node.finishWithStatement(object, body);\n    }\n\n    // ECMA-262 13.12 The switch statement\n\n    function parseSwitchCase() {\n        var test, consequent = [], statement, node = new Node();\n\n        if (matchKeyword('default')) {\n            lex();\n            test = null;\n        } else {\n            expectKeyword('case');\n            test = parseExpression();\n        }\n        expect(':');\n\n        while (startIndex < length) {\n            if (match('}') || matchKeyword('default') || matchKeyword('case')) {\n                break;\n            }\n            statement = parseStatementListItem();\n            consequent.push(statement);\n        }\n\n        return node.finishSwitchCase(test, consequent);\n    }\n\n    function parseSwitchStatement(node) {\n        var discriminant, cases, clause, oldInSwitch, defaultFound;\n\n        expectKeyword('switch');\n\n        expect('(');\n\n        discriminant = parseExpression();\n\n        expect(')');\n\n        expect('{');\n\n        cases = [];\n\n        if (match('}')) {\n            lex();\n            return node.finishSwitchStatement(discriminant, cases);\n        }\n\n        oldInSwitch = state.inSwitch;\n        state.inSwitch = true;\n        defaultFound = false;\n\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            clause = parseSwitchCase();\n            if (clause.test === null) {\n                if (defaultFound) {\n                    throwError(Messages.MultipleDefaultsInSwitch);\n                }\n                defaultFound = true;\n            }\n            cases.push(clause);\n        }\n\n        state.inSwitch = oldInSwitch;\n\n        expect('}');\n\n        return node.finishSwitchStatement(discriminant, cases);\n    }\n\n    // ECMA-262 13.14 The throw statement\n\n    function parseThrowStatement(node) {\n        var argument;\n\n        expectKeyword('throw');\n\n        if (hasLineTerminator) {\n            throwError(Messages.NewlineAfterThrow);\n        }\n\n        argument = parseExpression();\n\n        consumeSemicolon();\n\n        return node.finishThrowStatement(argument);\n    }\n\n    // ECMA-262 13.15 The try statement\n\n    function parseCatchClause() {\n        var param, params = [], paramMap = {}, key, i, body, node = new Node();\n\n        expectKeyword('catch');\n\n        expect('(');\n        if (match(')')) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        param = parsePattern(params);\n        for (i = 0; i < params.length; i++) {\n            key = '$' + params[i].value;\n            if (Object.prototype.hasOwnProperty.call(paramMap, key)) {\n                tolerateError(Messages.DuplicateBinding, params[i].value);\n            }\n            paramMap[key] = true;\n        }\n\n        // ECMA-262 12.14.1\n        if (strict && isRestrictedWord(param.name)) {\n            tolerateError(Messages.StrictCatchVariable);\n        }\n\n        expect(')');\n        body = parseBlock();\n        return node.finishCatchClause(param, body);\n    }\n\n    function parseTryStatement(node) {\n        var block, handler = null, finalizer = null;\n\n        expectKeyword('try');\n\n        block = parseBlock();\n\n        if (matchKeyword('catch')) {\n            handler = parseCatchClause();\n        }\n\n        if (matchKeyword('finally')) {\n            lex();\n            finalizer = parseBlock();\n        }\n\n        if (!handler && !finalizer) {\n            throwError(Messages.NoCatchOrFinally);\n        }\n\n        return node.finishTryStatement(block, handler, finalizer);\n    }\n\n    // ECMA-262 13.16 The debugger statement\n\n    function parseDebuggerStatement(node) {\n        expectKeyword('debugger');\n\n        consumeSemicolon();\n\n        return node.finishDebuggerStatement();\n    }\n\n    // 13 Statements\n\n    function parseStatement() {\n        var type = lookahead.type,\n            expr,\n            labeledBody,\n            key,\n            node;\n\n        if (type === Token.EOF) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        if (type === Token.Punctuator && lookahead.value === '{') {\n            return parseBlock();\n        }\n        isAssignmentTarget = isBindingElement = true;\n        node = new Node();\n\n        if (type === Token.Punctuator) {\n            switch (lookahead.value) {\n            case ';':\n                return parseEmptyStatement(node);\n            case '(':\n                return parseExpressionStatement(node);\n            default:\n                break;\n            }\n        } else if (type === Token.Keyword) {\n            switch (lookahead.value) {\n            case 'break':\n                return parseBreakStatement(node);\n            case 'continue':\n                return parseContinueStatement(node);\n            case 'debugger':\n                return parseDebuggerStatement(node);\n            case 'do':\n                return parseDoWhileStatement(node);\n            case 'for':\n                return parseForStatement(node);\n            case 'function':\n                return parseFunctionDeclaration(node);\n            case 'if':\n                return parseIfStatement(node);\n            case 'return':\n                return parseReturnStatement(node);\n            case 'switch':\n                return parseSwitchStatement(node);\n            case 'throw':\n                return parseThrowStatement(node);\n            case 'try':\n                return parseTryStatement(node);\n            case 'var':\n                return parseVariableStatement(node);\n            case 'while':\n                return parseWhileStatement(node);\n            case 'with':\n                return parseWithStatement(node);\n            default:\n                break;\n            }\n        }\n\n        expr = parseExpression();\n\n        // ECMA-262 12.12 Labelled Statements\n        if ((expr.type === Syntax.Identifier) && match(':')) {\n            lex();\n\n            key = '$' + expr.name;\n            if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.Redeclaration, 'Label', expr.name);\n            }\n\n            state.labelSet[key] = true;\n            labeledBody = parseStatement();\n            delete state.labelSet[key];\n            return node.finishLabeledStatement(expr, labeledBody);\n        }\n\n        consumeSemicolon();\n\n        return node.finishExpressionStatement(expr);\n    }\n\n    // ECMA-262 14.1 Function Definition\n\n    function parseFunctionSourceElements() {\n        var statement, body = [], token, directive, firstRestricted,\n            oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount,\n            node = new Node();\n\n        expect('{');\n\n        while (startIndex < length) {\n            if (lookahead.type !== Token.StringLiteral) {\n                break;\n            }\n            token = lookahead;\n\n            statement = parseStatementListItem();\n            body.push(statement);\n            if (statement.expression.type !== Syntax.Literal) {\n                // this is not directive\n                break;\n            }\n            directive = source.slice(token.start + 1, token.end - 1);\n            if (directive === 'use strict') {\n                strict = true;\n                if (firstRestricted) {\n                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);\n                }\n            } else {\n                if (!firstRestricted && token.octal) {\n                    firstRestricted = token;\n                }\n            }\n        }\n\n        oldLabelSet = state.labelSet;\n        oldInIteration = state.inIteration;\n        oldInSwitch = state.inSwitch;\n        oldInFunctionBody = state.inFunctionBody;\n        oldParenthesisCount = state.parenthesizedCount;\n\n        state.labelSet = {};\n        state.inIteration = false;\n        state.inSwitch = false;\n        state.inFunctionBody = true;\n        state.parenthesizedCount = 0;\n\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            body.push(parseStatementListItem());\n        }\n\n        expect('}');\n\n        state.labelSet = oldLabelSet;\n        state.inIteration = oldInIteration;\n        state.inSwitch = oldInSwitch;\n        state.inFunctionBody = oldInFunctionBody;\n        state.parenthesizedCount = oldParenthesisCount;\n\n        return node.finishBlockStatement(body);\n    }\n\n    function validateParam(options, param, name) {\n        var key = '$' + name;\n        if (strict) {\n            if (isRestrictedWord(name)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamName;\n            }\n            if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamDupe;\n            }\n        } else if (!options.firstRestricted) {\n            if (isRestrictedWord(name)) {\n                options.firstRestricted = param;\n                options.message = Messages.StrictParamName;\n            } else if (isStrictModeReservedWord(name)) {\n                options.firstRestricted = param;\n                options.message = Messages.StrictReservedWord;\n            } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamDupe;\n            }\n        }\n        options.paramSet[key] = true;\n    }\n\n    function parseParam(options) {\n        var token, param, params = [], i, def;\n\n        token = lookahead;\n        if (token.value === '...') {\n            param = parseRestElement(params);\n            validateParam(options, param.argument, param.argument.name);\n            options.params.push(param);\n            options.defaults.push(null);\n            return false;\n        }\n\n        param = parsePatternWithDefault(params);\n        for (i = 0; i < params.length; i++) {\n            validateParam(options, params[i], params[i].value);\n        }\n\n        if (param.type === Syntax.AssignmentPattern) {\n            def = param.right;\n            param = param.left;\n            ++options.defaultCount;\n        }\n\n        options.params.push(param);\n        options.defaults.push(def);\n\n        return !match(')');\n    }\n\n    function parseParams(firstRestricted) {\n        var options;\n\n        options = {\n            params: [],\n            defaultCount: 0,\n            defaults: [],\n            firstRestricted: firstRestricted\n        };\n\n        expect('(');\n\n        if (!match(')')) {\n            options.paramSet = {};\n            while (startIndex < length) {\n                if (!parseParam(options)) {\n                    break;\n                }\n                expect(',');\n            }\n        }\n\n        expect(')');\n\n        if (options.defaultCount === 0) {\n            options.defaults = [];\n        }\n\n        return {\n            params: options.params,\n            defaults: options.defaults,\n            stricted: options.stricted,\n            firstRestricted: options.firstRestricted,\n            message: options.message\n        };\n    }\n\n    function parseFunctionDeclaration(node, identifierIsOptional) {\n        var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict,\n            isGenerator, previousAllowYield;\n\n        previousAllowYield = state.allowYield;\n\n        expectKeyword('function');\n\n        isGenerator = match('*');\n        if (isGenerator) {\n            lex();\n        }\n\n        if (!identifierIsOptional || !match('(')) {\n            token = lookahead;\n            id = parseVariableIdentifier();\n            if (strict) {\n                if (isRestrictedWord(token.value)) {\n                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);\n                }\n            } else {\n                if (isRestrictedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictFunctionName;\n                } else if (isStrictModeReservedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictReservedWord;\n                }\n            }\n        }\n\n        state.allowYield = !isGenerator;\n        tmp = parseParams(firstRestricted);\n        params = tmp.params;\n        defaults = tmp.defaults;\n        stricted = tmp.stricted;\n        firstRestricted = tmp.firstRestricted;\n        if (tmp.message) {\n            message = tmp.message;\n        }\n\n\n        previousStrict = strict;\n        body = parseFunctionSourceElements();\n        if (strict && firstRestricted) {\n            throwUnexpectedToken(firstRestricted, message);\n        }\n        if (strict && stricted) {\n            tolerateUnexpectedToken(stricted, message);\n        }\n\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator);\n    }\n\n    function parseFunctionExpression() {\n        var token, id = null, stricted, firstRestricted, message, tmp,\n            params = [], defaults = [], body, previousStrict, node = new Node(),\n            isGenerator, previousAllowYield;\n\n        previousAllowYield = state.allowYield;\n\n        expectKeyword('function');\n\n        isGenerator = match('*');\n        if (isGenerator) {\n            lex();\n        }\n\n        state.allowYield = !isGenerator;\n        if (!match('(')) {\n            token = lookahead;\n            id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier();\n            if (strict) {\n                if (isRestrictedWord(token.value)) {\n                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);\n                }\n            } else {\n                if (isRestrictedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictFunctionName;\n                } else if (isStrictModeReservedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictReservedWord;\n                }\n            }\n        }\n\n        tmp = parseParams(firstRestricted);\n        params = tmp.params;\n        defaults = tmp.defaults;\n        stricted = tmp.stricted;\n        firstRestricted = tmp.firstRestricted;\n        if (tmp.message) {\n            message = tmp.message;\n        }\n\n        previousStrict = strict;\n        body = parseFunctionSourceElements();\n        if (strict && firstRestricted) {\n            throwUnexpectedToken(firstRestricted, message);\n        }\n        if (strict && stricted) {\n            tolerateUnexpectedToken(stricted, message);\n        }\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishFunctionExpression(id, params, defaults, body, isGenerator);\n    }\n\n    // ECMA-262 14.5 Class Definitions\n\n    function parseClassBody() {\n        var classBody, token, isStatic, hasConstructor = false, body, method, computed, key;\n\n        classBody = new Node();\n\n        expect('{');\n        body = [];\n        while (!match('}')) {\n            if (match(';')) {\n                lex();\n            } else {\n                method = new Node();\n                token = lookahead;\n                isStatic = false;\n                computed = match('[');\n                if (match('*')) {\n                    lex();\n                } else {\n                    key = parseObjectPropertyKey();\n                    if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) {\n                        token = lookahead;\n                        isStatic = true;\n                        computed = match('[');\n                        if (match('*')) {\n                            lex();\n                        } else {\n                            key = parseObjectPropertyKey();\n                        }\n                    }\n                }\n                method = tryParseMethodDefinition(token, key, computed, method);\n                if (method) {\n                    method['static'] = isStatic; // jscs:ignore requireDotNotation\n                    if (method.kind === 'init') {\n                        method.kind = 'method';\n                    }\n                    if (!isStatic) {\n                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') {\n                            if (method.kind !== 'method' || !method.method || method.value.generator) {\n                                throwUnexpectedToken(token, Messages.ConstructorSpecialMethod);\n                            }\n                            if (hasConstructor) {\n                                throwUnexpectedToken(token, Messages.DuplicateConstructor);\n                            } else {\n                                hasConstructor = true;\n                            }\n                            method.kind = 'constructor';\n                        }\n                    } else {\n                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') {\n                            throwUnexpectedToken(token, Messages.StaticPrototype);\n                        }\n                    }\n                    method.type = Syntax.MethodDefinition;\n                    delete method.method;\n                    delete method.shorthand;\n                    body.push(method);\n                } else {\n                    throwUnexpectedToken(lookahead);\n                }\n            }\n        }\n        lex();\n        return classBody.finishClassBody(body);\n    }\n\n    function parseClassDeclaration(identifierIsOptional) {\n        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;\n        strict = true;\n\n        expectKeyword('class');\n\n        if (!identifierIsOptional || lookahead.type === Token.Identifier) {\n            id = parseVariableIdentifier();\n        }\n\n        if (matchKeyword('extends')) {\n            lex();\n            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);\n        }\n        classBody = parseClassBody();\n        strict = previousStrict;\n\n        return classNode.finishClassDeclaration(id, superClass, classBody);\n    }\n\n    function parseClassExpression() {\n        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;\n        strict = true;\n\n        expectKeyword('class');\n\n        if (lookahead.type === Token.Identifier) {\n            id = parseVariableIdentifier();\n        }\n\n        if (matchKeyword('extends')) {\n            lex();\n            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);\n        }\n        classBody = parseClassBody();\n        strict = previousStrict;\n\n        return classNode.finishClassExpression(id, superClass, classBody);\n    }\n\n    // ECMA-262 15.2 Modules\n\n    function parseModuleSpecifier() {\n        var node = new Node();\n\n        if (lookahead.type !== Token.StringLiteral) {\n            throwError(Messages.InvalidModuleSpecifier);\n        }\n        return node.finishLiteral(lex());\n    }\n\n    // ECMA-262 15.2.3 Exports\n\n    function parseExportSpecifier() {\n        var exported, local, node = new Node(), def;\n        if (matchKeyword('default')) {\n            // export {default} from 'something';\n            def = new Node();\n            lex();\n            local = def.finishIdentifier('default');\n        } else {\n            local = parseVariableIdentifier();\n        }\n        if (matchContextualKeyword('as')) {\n            lex();\n            exported = parseNonComputedProperty();\n        }\n        return node.finishExportSpecifier(local, exported);\n    }\n\n    function parseExportNamedDeclaration(node) {\n        var declaration = null,\n            isExportFromIdentifier,\n            src = null, specifiers = [];\n\n        // non-default export\n        if (lookahead.type === Token.Keyword) {\n            // covers:\n            // export var f = 1;\n            switch (lookahead.value) {\n                case 'let':\n                case 'const':\n                    declaration = parseLexicalDeclaration({inFor: false});\n                    return node.finishExportNamedDeclaration(declaration, specifiers, null);\n                case 'var':\n                case 'class':\n                case 'function':\n                    declaration = parseStatementListItem();\n                    return node.finishExportNamedDeclaration(declaration, specifiers, null);\n            }\n        }\n\n        expect('{');\n        while (!match('}')) {\n            isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default');\n            specifiers.push(parseExportSpecifier());\n            if (!match('}')) {\n                expect(',');\n                if (match('}')) {\n                    break;\n                }\n            }\n        }\n        expect('}');\n\n        if (matchContextualKeyword('from')) {\n            // covering:\n            // export {default} from 'foo';\n            // export {foo} from 'foo';\n            lex();\n            src = parseModuleSpecifier();\n            consumeSemicolon();\n        } else if (isExportFromIdentifier) {\n            // covering:\n            // export {default}; // missing fromClause\n            throwError(lookahead.value ?\n                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n        } else {\n            // cover\n            // export {foo};\n            consumeSemicolon();\n        }\n        return node.finishExportNamedDeclaration(declaration, specifiers, src);\n    }\n\n    function parseExportDefaultDeclaration(node) {\n        var declaration = null,\n            expression = null;\n\n        // covers:\n        // export default ...\n        expectKeyword('default');\n\n        if (matchKeyword('function')) {\n            // covers:\n            // export default function foo () {}\n            // export default function () {}\n            declaration = parseFunctionDeclaration(new Node(), true);\n            return node.finishExportDefaultDeclaration(declaration);\n        }\n        if (matchKeyword('class')) {\n            declaration = parseClassDeclaration(true);\n            return node.finishExportDefaultDeclaration(declaration);\n        }\n\n        if (matchContextualKeyword('from')) {\n            throwError(Messages.UnexpectedToken, lookahead.value);\n        }\n\n        // covers:\n        // export default {};\n        // export default [];\n        // export default (1 + 2);\n        if (match('{')) {\n            expression = parseObjectInitializer();\n        } else if (match('[')) {\n            expression = parseArrayInitializer();\n        } else {\n            expression = parseAssignmentExpression();\n        }\n        consumeSemicolon();\n        return node.finishExportDefaultDeclaration(expression);\n    }\n\n    function parseExportAllDeclaration(node) {\n        var src;\n\n        // covers:\n        // export * from 'foo';\n        expect('*');\n        if (!matchContextualKeyword('from')) {\n            throwError(lookahead.value ?\n                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n        }\n        lex();\n        src = parseModuleSpecifier();\n        consumeSemicolon();\n\n        return node.finishExportAllDeclaration(src);\n    }\n\n    function parseExportDeclaration() {\n        var node = new Node();\n        if (state.inFunctionBody) {\n            throwError(Messages.IllegalExportDeclaration);\n        }\n\n        expectKeyword('export');\n\n        if (matchKeyword('default')) {\n            return parseExportDefaultDeclaration(node);\n        }\n        if (match('*')) {\n            return parseExportAllDeclaration(node);\n        }\n        return parseExportNamedDeclaration(node);\n    }\n\n    // ECMA-262 15.2.2 Imports\n\n    function parseImportSpecifier() {\n        // import {<foo as bar>} ...;\n        var local, imported, node = new Node();\n\n        imported = parseNonComputedProperty();\n        if (matchContextualKeyword('as')) {\n            lex();\n            local = parseVariableIdentifier();\n        }\n\n        return node.finishImportSpecifier(local, imported);\n    }\n\n    function parseNamedImports() {\n        var specifiers = [];\n        // {foo, bar as bas}\n        expect('{');\n        while (!match('}')) {\n            specifiers.push(parseImportSpecifier());\n            if (!match('}')) {\n                expect(',');\n                if (match('}')) {\n                    break;\n                }\n            }\n        }\n        expect('}');\n        return specifiers;\n    }\n\n    function parseImportDefaultSpecifier() {\n        // import <foo> ...;\n        var local, node = new Node();\n\n        local = parseNonComputedProperty();\n\n        return node.finishImportDefaultSpecifier(local);\n    }\n\n    function parseImportNamespaceSpecifier() {\n        // import <* as foo> ...;\n        var local, node = new Node();\n\n        expect('*');\n        if (!matchContextualKeyword('as')) {\n            throwError(Messages.NoAsAfterImportNamespace);\n        }\n        lex();\n        local = parseNonComputedProperty();\n\n        return node.finishImportNamespaceSpecifier(local);\n    }\n\n    function parseImportDeclaration() {\n        var specifiers = [], src, node = new Node();\n\n        if (state.inFunctionBody) {\n            throwError(Messages.IllegalImportDeclaration);\n        }\n\n        expectKeyword('import');\n\n        if (lookahead.type === Token.StringLiteral) {\n            // import 'foo';\n            src = parseModuleSpecifier();\n        } else {\n\n            if (match('{')) {\n                // import {bar}\n                specifiers = specifiers.concat(parseNamedImports());\n            } else if (match('*')) {\n                // import * as foo\n                specifiers.push(parseImportNamespaceSpecifier());\n            } else if (isIdentifierName(lookahead) && !matchKeyword('default')) {\n                // import foo\n                specifiers.push(parseImportDefaultSpecifier());\n                if (match(',')) {\n                    lex();\n                    if (match('*')) {\n                        // import foo, * as foo\n                        specifiers.push(parseImportNamespaceSpecifier());\n                    } else if (match('{')) {\n                        // import foo, {bar}\n                        specifiers = specifiers.concat(parseNamedImports());\n                    } else {\n                        throwUnexpectedToken(lookahead);\n                    }\n                }\n            } else {\n                throwUnexpectedToken(lex());\n            }\n\n            if (!matchContextualKeyword('from')) {\n                throwError(lookahead.value ?\n                        Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n            }\n            lex();\n            src = parseModuleSpecifier();\n        }\n\n        consumeSemicolon();\n        return node.finishImportDeclaration(specifiers, src);\n    }\n\n    // ECMA-262 15.1 Scripts\n\n    function parseScriptBody() {\n        var statement, body = [], token, directive, firstRestricted;\n\n        while (startIndex < length) {\n            token = lookahead;\n            if (token.type !== Token.StringLiteral) {\n                break;\n            }\n\n            statement = parseStatementListItem();\n            body.push(statement);\n            if (statement.expression.type !== Syntax.Literal) {\n                // this is not directive\n                break;\n            }\n            directive = source.slice(token.start + 1, token.end - 1);\n            if (directive === 'use strict') {\n                strict = true;\n                if (firstRestricted) {\n                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);\n                }\n            } else {\n                if (!firstRestricted && token.octal) {\n                    firstRestricted = token;\n                }\n            }\n        }\n\n        while (startIndex < length) {\n            statement = parseStatementListItem();\n            /* istanbul ignore if */\n            if (typeof statement === 'undefined') {\n                break;\n            }\n            body.push(statement);\n        }\n        return body;\n    }\n\n    function parseProgram() {\n        var body, node;\n\n        peek();\n        node = new Node();\n\n        body = parseScriptBody();\n        return node.finishProgram(body, state.sourceType);\n    }\n\n    function filterTokenLocation() {\n        var i, entry, token, tokens = [];\n\n        for (i = 0; i < extra.tokens.length; ++i) {\n            entry = extra.tokens[i];\n            token = {\n                type: entry.type,\n                value: entry.value\n            };\n            if (entry.regex) {\n                token.regex = {\n                    pattern: entry.regex.pattern,\n                    flags: entry.regex.flags\n                };\n            }\n            if (extra.range) {\n                token.range = entry.range;\n            }\n            if (extra.loc) {\n                token.loc = entry.loc;\n            }\n            tokens.push(token);\n        }\n\n        extra.tokens = tokens;\n    }\n\n    function tokenize(code, options, delegate) {\n        var toString,\n            tokens;\n\n        toString = String;\n        if (typeof code !== 'string' && !(code instanceof String)) {\n            code = toString(code);\n        }\n\n        source = code;\n        index = 0;\n        lineNumber = (source.length > 0) ? 1 : 0;\n        lineStart = 0;\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n        length = source.length;\n        lookahead = null;\n        state = {\n            allowIn: true,\n            allowYield: true,\n            labelSet: {},\n            inFunctionBody: false,\n            inIteration: false,\n            inSwitch: false,\n            lastCommentStart: -1,\n            curlyStack: []\n        };\n\n        extra = {};\n\n        // Options matching.\n        options = options || {};\n\n        // Of course we collect tokens here.\n        options.tokens = true;\n        extra.tokens = [];\n        extra.tokenValues = [];\n        extra.tokenize = true;\n        extra.delegate = delegate;\n\n        // The following two fields are necessary to compute the Regex tokens.\n        extra.openParenToken = -1;\n        extra.openCurlyToken = -1;\n\n        extra.range = (typeof options.range === 'boolean') && options.range;\n        extra.loc = (typeof options.loc === 'boolean') && options.loc;\n\n        if (typeof options.comment === 'boolean' && options.comment) {\n            extra.comments = [];\n        }\n        if (typeof options.tolerant === 'boolean' && options.tolerant) {\n            extra.errors = [];\n        }\n\n        try {\n            peek();\n            if (lookahead.type === Token.EOF) {\n                return extra.tokens;\n            }\n\n            lex();\n            while (lookahead.type !== Token.EOF) {\n                try {\n                    lex();\n                } catch (lexError) {\n                    if (extra.errors) {\n                        recordError(lexError);\n                        // We have to break on the first error\n                        // to avoid infinite loops.\n                        break;\n                    } else {\n                        throw lexError;\n                    }\n                }\n            }\n\n            tokens = extra.tokens;\n            if (typeof extra.errors !== 'undefined') {\n                tokens.errors = extra.errors;\n            }\n        } catch (e) {\n            throw e;\n        } finally {\n            extra = {};\n        }\n        return tokens;\n    }\n\n    function parse(code, options) {\n        var program, toString;\n\n        toString = String;\n        if (typeof code !== 'string' && !(code instanceof String)) {\n            code = toString(code);\n        }\n\n        source = code;\n        index = 0;\n        lineNumber = (source.length > 0) ? 1 : 0;\n        lineStart = 0;\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n        length = source.length;\n        lookahead = null;\n        state = {\n            allowIn: true,\n            allowYield: true,\n            labelSet: {},\n            inFunctionBody: false,\n            inIteration: false,\n            inSwitch: false,\n            lastCommentStart: -1,\n            curlyStack: [],\n            sourceType: 'script'\n        };\n        strict = false;\n\n        extra = {};\n        if (typeof options !== 'undefined') {\n            extra.range = (typeof options.range === 'boolean') && options.range;\n            extra.loc = (typeof options.loc === 'boolean') && options.loc;\n            extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment;\n\n            if (extra.loc && options.source !== null && options.source !== undefined) {\n                extra.source = toString(options.source);\n            }\n\n            if (typeof options.tokens === 'boolean' && options.tokens) {\n                extra.tokens = [];\n            }\n            if (typeof options.comment === 'boolean' && options.comment) {\n                extra.comments = [];\n            }\n            if (typeof options.tolerant === 'boolean' && options.tolerant) {\n                extra.errors = [];\n            }\n            if (extra.attachComment) {\n                extra.range = true;\n                extra.comments = [];\n                extra.bottomRightStack = [];\n                extra.trailingComments = [];\n                extra.leadingComments = [];\n            }\n            if (options.sourceType === 'module') {\n                // very restrictive condition for now\n                state.sourceType = options.sourceType;\n                strict = true;\n            }\n        }\n\n        try {\n            program = parseProgram();\n            if (typeof extra.comments !== 'undefined') {\n                program.comments = extra.comments;\n            }\n            if (typeof extra.tokens !== 'undefined') {\n                filterTokenLocation();\n                program.tokens = extra.tokens;\n            }\n            if (typeof extra.errors !== 'undefined') {\n                program.errors = extra.errors;\n            }\n        } catch (e) {\n            throw e;\n        } finally {\n            extra = {};\n        }\n\n        return program;\n    }\n\n    // Sync with *.json manifests.\n    exports.version = '2.7.0';\n\n    exports.tokenize = tokenize;\n\n    exports.parse = parse;\n\n    // Deep copy.\n    /* istanbul ignore next */\n    exports.Syntax = (function () {\n        var name, types = {};\n\n        if (typeof Object.create === 'function') {\n            types = Object.create(null);\n        }\n\n        for (name in Syntax) {\n            if (Syntax.hasOwnProperty(name)) {\n                types[name] = Syntax[name];\n            }\n        }\n\n        if (typeof Object.freeze === 'function') {\n            Object.freeze(types);\n        }\n\n        return types;\n    }());\n\n}));\n/* vim: set sw=4 ts=4 et tw=80 : */\n",
-    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nfunction EventEmitter() {\n  this._events = this._events || {};\n  this._maxListeners = this._maxListeners || undefined;\n}\nmodule.exports = EventEmitter;\n\n// Backwards-compat with node 0.10.x\nEventEmitter.EventEmitter = EventEmitter;\n\nEventEmitter.prototype._events = undefined;\nEventEmitter.prototype._maxListeners = undefined;\n\n// By default EventEmitters will print a warning if more than 10 listeners are\n// added to it. This is a useful default which helps finding memory leaks.\nEventEmitter.defaultMaxListeners = 10;\n\n// Obviously not all Emitters should be limited to 10. This function allows\n// that to be increased. Set to zero for unlimited.\nEventEmitter.prototype.setMaxListeners = function(n) {\n  if (!isNumber(n) || n < 0 || isNaN(n))\n    throw TypeError('n must be a positive number');\n  this._maxListeners = n;\n  return this;\n};\n\nEventEmitter.prototype.emit = function(type) {\n  var er, handler, len, args, i, listeners;\n\n  if (!this._events)\n    this._events = {};\n\n  // If there is no 'error' event listener then throw.\n  if (type === 'error') {\n    if (!this._events.error ||\n        (isObject(this._events.error) && !this._events.error.length)) {\n      er = arguments[1];\n      if (er instanceof Error) {\n        throw er; // Unhandled 'error' event\n      }\n      throw TypeError('Uncaught, unspecified \"error\" event.');\n    }\n  }\n\n  handler = this._events[type];\n\n  if (isUndefined(handler))\n    return false;\n\n  if (isFunction(handler)) {\n    switch (arguments.length) {\n      // fast cases\n      case 1:\n        handler.call(this);\n        break;\n      case 2:\n        handler.call(this, arguments[1]);\n        break;\n      case 3:\n        handler.call(this, arguments[1], arguments[2]);\n        break;\n      // slower\n      default:\n        len = arguments.length;\n        args = new Array(len - 1);\n        for (i = 1; i < len; i++)\n          args[i - 1] = arguments[i];\n        handler.apply(this, args);\n    }\n  } else if (isObject(handler)) {\n    len = arguments.length;\n    args = new Array(len - 1);\n    for (i = 1; i < len; i++)\n      args[i - 1] = arguments[i];\n\n    listeners = handler.slice();\n    len = listeners.length;\n    for (i = 0; i < len; i++)\n      listeners[i].apply(this, args);\n  }\n\n  return true;\n};\n\nEventEmitter.prototype.addListener = function(type, listener) {\n  var m;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events)\n    this._events = {};\n\n  // To avoid recursion in the case that type === \"newListener\"! Before\n  // adding it to the listeners, first emit \"newListener\".\n  if (this._events.newListener)\n    this.emit('newListener', type,\n              isFunction(listener.listener) ?\n              listener.listener : listener);\n\n  if (!this._events[type])\n    // Optimize the case of one listener. Don't need the extra array object.\n    this._events[type] = listener;\n  else if (isObject(this._events[type]))\n    // If we've already got an array, just append.\n    this._events[type].push(listener);\n  else\n    // Adding the second element, need to change to array.\n    this._events[type] = [this._events[type], listener];\n\n  // Check for listener leak\n  if (isObject(this._events[type]) && !this._events[type].warned) {\n    var m;\n    if (!isUndefined(this._maxListeners)) {\n      m = this._maxListeners;\n    } else {\n      m = EventEmitter.defaultMaxListeners;\n    }\n\n    if (m && m > 0 && this._events[type].length > m) {\n      this._events[type].warned = true;\n      console.error('(node) warning: possible EventEmitter memory ' +\n                    'leak detected. %d listeners added. ' +\n                    'Use emitter.setMaxListeners() to increase limit.',\n                    this._events[type].length);\n      if (typeof console.trace === 'function') {\n        // not supported in IE 10\n        console.trace();\n      }\n    }\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.once = function(type, listener) {\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  var fired = false;\n\n  function g() {\n    this.removeListener(type, g);\n\n    if (!fired) {\n      fired = true;\n      listener.apply(this, arguments);\n    }\n  }\n\n  g.listener = listener;\n  this.on(type, g);\n\n  return this;\n};\n\n// emits a 'removeListener' event iff the listener was removed\nEventEmitter.prototype.removeListener = function(type, listener) {\n  var list, position, length, i;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events || !this._events[type])\n    return this;\n\n  list = this._events[type];\n  length = list.length;\n  position = -1;\n\n  if (list === listener ||\n      (isFunction(list.listener) && list.listener === listener)) {\n    delete this._events[type];\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n\n  } else if (isObject(list)) {\n    for (i = length; i-- > 0;) {\n      if (list[i] === listener ||\n          (list[i].listener && list[i].listener === listener)) {\n        position = i;\n        break;\n      }\n    }\n\n    if (position < 0)\n      return this;\n\n    if (list.length === 1) {\n      list.length = 0;\n      delete this._events[type];\n    } else {\n      list.splice(position, 1);\n    }\n\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.removeAllListeners = function(type) {\n  var key, listeners;\n\n  if (!this._events)\n    return this;\n\n  // not listening for removeListener, no need to emit\n  if (!this._events.removeListener) {\n    if (arguments.length === 0)\n      this._events = {};\n    else if (this._events[type])\n      delete this._events[type];\n    return this;\n  }\n\n  // emit removeListener for all listeners on all events\n  if (arguments.length === 0) {\n    for (key in this._events) {\n      if (key === 'removeListener') continue;\n      this.removeAllListeners(key);\n    }\n    this.removeAllListeners('removeListener');\n    this._events = {};\n    return this;\n  }\n\n  listeners = this._events[type];\n\n  if (isFunction(listeners)) {\n    this.removeListener(type, listeners);\n  } else {\n    // LIFO order\n    while (listeners.length)\n      this.removeListener(type, listeners[listeners.length - 1]);\n  }\n  delete this._events[type];\n\n  return this;\n};\n\nEventEmitter.prototype.listeners = function(type) {\n  var ret;\n  if (!this._events || !this._events[type])\n    ret = [];\n  else if (isFunction(this._events[type]))\n    ret = [this._events[type]];\n  else\n    ret = this._events[type].slice();\n  return ret;\n};\n\nEventEmitter.listenerCount = function(emitter, type) {\n  var ret;\n  if (!emitter._events || !emitter._events[type])\n    ret = 0;\n  else if (isFunction(emitter._events[type]))\n    ret = 1;\n  else\n    ret = emitter._events[type].length;\n  return ret;\n};\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\n",
-    "\nvar hasOwn = Object.prototype.hasOwnProperty;\nvar toString = Object.prototype.toString;\n\nmodule.exports = function forEach (obj, fn, ctx) {\n    if (toString.call(fn) !== '[object Function]') {\n        throw new TypeError('iterator must be a function');\n    }\n    var l = obj.length;\n    if (l === +l) {\n        for (var i = 0; i < l; i++) {\n            fn.call(ctx, obj[i], i, obj);\n        }\n    } else {\n        for (var k in obj) {\n            if (hasOwn.call(obj, k)) {\n                fn.call(ctx, obj[k], k, obj);\n            }\n        }\n    }\n};\n\n",
+    "/*\n  Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.\n\n  Redistribution and use in source and binary forms, with or without\n  modification, are permitted provided that the following conditions are met:\n\n    * Redistributions of source code must retain the above copyright\n      notice, this list of conditions and the following disclaimer.\n    * Redistributions in binary form must reproduce the above copyright\n      notice, this list of conditions and the following disclaimer in the\n      documentation and/or other materials provided with the distribution.\n\n  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY\n  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\n  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\n  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n*/\n\n(function (root, factory) {\n    'use strict';\n\n    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,\n    // Rhino, and plain browser loading.\n\n    /* istanbul ignore next */\n    if (typeof define === 'function' && define.amd) {\n        define(['exports'], factory);\n    } else if (typeof exports !== 'undefined') {\n        factory(exports);\n    } else {\n        factory((root.esprima = {}));\n    }\n}(this, function (exports) {\n    'use strict';\n\n    var Token,\n        TokenName,\n        FnExprTokens,\n        Syntax,\n        PlaceHolders,\n        Messages,\n        Regex,\n        source,\n        strict,\n        index,\n        lineNumber,\n        lineStart,\n        hasLineTerminator,\n        lastIndex,\n        lastLineNumber,\n        lastLineStart,\n        startIndex,\n        startLineNumber,\n        startLineStart,\n        scanning,\n        length,\n        lookahead,\n        state,\n        extra,\n        isBindingElement,\n        isAssignmentTarget,\n        firstCoverInitializedNameError;\n\n    Token = {\n        BooleanLiteral: 1,\n        EOF: 2,\n        Identifier: 3,\n        Keyword: 4,\n        NullLiteral: 5,\n        NumericLiteral: 6,\n        Punctuator: 7,\n        StringLiteral: 8,\n        RegularExpression: 9,\n        Template: 10\n    };\n\n    TokenName = {};\n    TokenName[Token.BooleanLiteral] = 'Boolean';\n    TokenName[Token.EOF] = '<end>';\n    TokenName[Token.Identifier] = 'Identifier';\n    TokenName[Token.Keyword] = 'Keyword';\n    TokenName[Token.NullLiteral] = 'Null';\n    TokenName[Token.NumericLiteral] = 'Numeric';\n    TokenName[Token.Punctuator] = 'Punctuator';\n    TokenName[Token.StringLiteral] = 'String';\n    TokenName[Token.RegularExpression] = 'RegularExpression';\n    TokenName[Token.Template] = 'Template';\n\n    // A function following one of those tokens is an expression.\n    FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',\n                    'return', 'case', 'delete', 'throw', 'void',\n                    // assignment operators\n                    '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=',\n                    '&=', '|=', '^=', ',',\n                    // binary/unary operators\n                    '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&',\n                    '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',\n                    '<=', '<', '>', '!=', '!=='];\n\n    Syntax = {\n        AssignmentExpression: 'AssignmentExpression',\n        AssignmentPattern: 'AssignmentPattern',\n        ArrayExpression: 'ArrayExpression',\n        ArrayPattern: 'ArrayPattern',\n        ArrowFunctionExpression: 'ArrowFunctionExpression',\n        BlockStatement: 'BlockStatement',\n        BinaryExpression: 'BinaryExpression',\n        BreakStatement: 'BreakStatement',\n        CallExpression: 'CallExpression',\n        CatchClause: 'CatchClause',\n        ClassBody: 'ClassBody',\n        ClassDeclaration: 'ClassDeclaration',\n        ClassExpression: 'ClassExpression',\n        ConditionalExpression: 'ConditionalExpression',\n        ContinueStatement: 'ContinueStatement',\n        DoWhileStatement: 'DoWhileStatement',\n        DebuggerStatement: 'DebuggerStatement',\n        EmptyStatement: 'EmptyStatement',\n        ExportAllDeclaration: 'ExportAllDeclaration',\n        ExportDefaultDeclaration: 'ExportDefaultDeclaration',\n        ExportNamedDeclaration: 'ExportNamedDeclaration',\n        ExportSpecifier: 'ExportSpecifier',\n        ExpressionStatement: 'ExpressionStatement',\n        ForStatement: 'ForStatement',\n        ForOfStatement: 'ForOfStatement',\n        ForInStatement: 'ForInStatement',\n        FunctionDeclaration: 'FunctionDeclaration',\n        FunctionExpression: 'FunctionExpression',\n        Identifier: 'Identifier',\n        IfStatement: 'IfStatement',\n        ImportDeclaration: 'ImportDeclaration',\n        ImportDefaultSpecifier: 'ImportDefaultSpecifier',\n        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',\n        ImportSpecifier: 'ImportSpecifier',\n        Literal: 'Literal',\n        LabeledStatement: 'LabeledStatement',\n        LogicalExpression: 'LogicalExpression',\n        MemberExpression: 'MemberExpression',\n        MetaProperty: 'MetaProperty',\n        MethodDefinition: 'MethodDefinition',\n        NewExpression: 'NewExpression',\n        ObjectExpression: 'ObjectExpression',\n        ObjectPattern: 'ObjectPattern',\n        Program: 'Program',\n        Property: 'Property',\n        RestElement: 'RestElement',\n        ReturnStatement: 'ReturnStatement',\n        SequenceExpression: 'SequenceExpression',\n        SpreadElement: 'SpreadElement',\n        Super: 'Super',\n        SwitchCase: 'SwitchCase',\n        SwitchStatement: 'SwitchStatement',\n        TaggedTemplateExpression: 'TaggedTemplateExpression',\n        TemplateElement: 'TemplateElement',\n        TemplateLiteral: 'TemplateLiteral',\n        ThisExpression: 'ThisExpression',\n        ThrowStatement: 'ThrowStatement',\n        TryStatement: 'TryStatement',\n        UnaryExpression: 'UnaryExpression',\n        UpdateExpression: 'UpdateExpression',\n        VariableDeclaration: 'VariableDeclaration',\n        VariableDeclarator: 'VariableDeclarator',\n        WhileStatement: 'WhileStatement',\n        WithStatement: 'WithStatement',\n        YieldExpression: 'YieldExpression'\n    };\n\n    PlaceHolders = {\n        ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder'\n    };\n\n    // Error messages should be identical to V8.\n    Messages = {\n        UnexpectedToken: 'Unexpected token %0',\n        UnexpectedNumber: 'Unexpected number',\n        UnexpectedString: 'Unexpected string',\n        UnexpectedIdentifier: 'Unexpected identifier',\n        UnexpectedReserved: 'Unexpected reserved word',\n        UnexpectedTemplate: 'Unexpected quasi %0',\n        UnexpectedEOS: 'Unexpected end of input',\n        NewlineAfterThrow: 'Illegal newline after throw',\n        InvalidRegExp: 'Invalid regular expression',\n        UnterminatedRegExp: 'Invalid regular expression: missing /',\n        InvalidLHSInAssignment: 'Invalid left-hand side in assignment',\n        InvalidLHSInForIn: 'Invalid left-hand side in for-in',\n        InvalidLHSInForLoop: 'Invalid left-hand side in for-loop',\n        MultipleDefaultsInSwitch: 'More than one default clause in switch statement',\n        NoCatchOrFinally: 'Missing catch or finally after try',\n        UnknownLabel: 'Undefined label \\'%0\\'',\n        Redeclaration: '%0 \\'%1\\' has already been declared',\n        IllegalContinue: 'Illegal continue statement',\n        IllegalBreak: 'Illegal break statement',\n        IllegalReturn: 'Illegal return statement',\n        StrictModeWith: 'Strict mode code may not include a with statement',\n        StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode',\n        StrictVarName: 'Variable name may not be eval or arguments in strict mode',\n        StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode',\n        StrictParamDupe: 'Strict mode function may not have duplicate parameter names',\n        StrictFunctionName: 'Function name may not be eval or arguments in strict mode',\n        StrictOctalLiteral: 'Octal literals are not allowed in strict mode.',\n        StrictDelete: 'Delete of an unqualified identifier in strict mode.',\n        StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode',\n        StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode',\n        StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode',\n        StrictReservedWord: 'Use of future reserved word in strict mode',\n        TemplateOctalLiteral: 'Octal literals are not allowed in template strings.',\n        ParameterAfterRestParameter: 'Rest parameter must be last formal parameter',\n        DefaultRestParameter: 'Unexpected token =',\n        ObjectPatternAsRestParameter: 'Unexpected token {',\n        DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals',\n        ConstructorSpecialMethod: 'Class constructor may not be an accessor',\n        DuplicateConstructor: 'A class may only have one constructor',\n        StaticPrototype: 'Classes may not have static property named prototype',\n        MissingFromClause: 'Unexpected token',\n        NoAsAfterImportNamespace: 'Unexpected token',\n        InvalidModuleSpecifier: 'Unexpected token',\n        IllegalImportDeclaration: 'Unexpected token',\n        IllegalExportDeclaration: 'Unexpected token',\n        DuplicateBinding: 'Duplicate binding %0'\n    };\n\n    // See also tools/generate-unicode-regex.js.\n    Regex = {\n        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart:\n        NonAsciiIdentifierStart: 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       // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart:\n        NonAsciiIdentifierPart: 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   };\n\n    // Ensure the condition is true, otherwise throw an error.\n    // This is only to have a better contract semantic, i.e. another safety net\n    // to catch a logic error. The condition shall be fulfilled in normal case.\n    // Do NOT use this to enforce a certain condition on any user input.\n\n    function assert(condition, message) {\n        /* istanbul ignore if */\n        if (!condition) {\n            throw new Error('ASSERT: ' + message);\n        }\n    }\n\n    function isDecimalDigit(ch) {\n        return (ch >= 0x30 && ch <= 0x39);   // 0..9\n    }\n\n    function isHexDigit(ch) {\n        return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;\n    }\n\n    function isOctalDigit(ch) {\n        return '01234567'.indexOf(ch) >= 0;\n    }\n\n    function octalToDecimal(ch) {\n        // \\0 is not octal escape sequence\n        var octal = (ch !== '0'), code = '01234567'.indexOf(ch);\n\n        if (index < length && isOctalDigit(source[index])) {\n            octal = true;\n            code = code * 8 + '01234567'.indexOf(source[index++]);\n\n            // 3 digits are only allowed when string starts\n            // with 0, 1, 2, 3\n            if ('0123'.indexOf(ch) >= 0 &&\n                    index < length &&\n                    isOctalDigit(source[index])) {\n                code = code * 8 + '01234567'.indexOf(source[index++]);\n            }\n        }\n\n        return {\n            code: code,\n            octal: octal\n        };\n    }\n\n    // ECMA-262 11.2 White Space\n\n    function isWhiteSpace(ch) {\n        return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) ||\n            (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0);\n    }\n\n    // ECMA-262 11.3 Line Terminators\n\n    function isLineTerminator(ch) {\n        return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029);\n    }\n\n    // ECMA-262 11.6 Identifier Names and Identifiers\n\n    function fromCodePoint(cp) {\n        return (cp < 0x10000) ? String.fromCharCode(cp) :\n            String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) +\n            String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023));\n    }\n\n    function isIdentifierStart(ch) {\n        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)\n            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z\n            (ch >= 0x61 && ch <= 0x7A) ||         // a..z\n            (ch === 0x5C) ||                      // \\ (backslash)\n            ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch)));\n    }\n\n    function isIdentifierPart(ch) {\n        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)\n            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z\n            (ch >= 0x61 && ch <= 0x7A) ||         // a..z\n            (ch >= 0x30 && ch <= 0x39) ||         // 0..9\n            (ch === 0x5C) ||                      // \\ (backslash)\n            ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch)));\n    }\n\n    // ECMA-262 11.6.2.2 Future Reserved Words\n\n    function isFutureReservedWord(id) {\n        switch (id) {\n        case 'enum':\n        case 'export':\n        case 'import':\n        case 'super':\n            return true;\n        default:\n            return false;\n        }\n    }\n\n    function isStrictModeReservedWord(id) {\n        switch (id) {\n        case 'implements':\n        case 'interface':\n        case 'package':\n        case 'private':\n        case 'protected':\n        case 'public':\n        case 'static':\n        case 'yield':\n        case 'let':\n            return true;\n        default:\n            return false;\n        }\n    }\n\n    function isRestrictedWord(id) {\n        return id === 'eval' || id === 'arguments';\n    }\n\n    // ECMA-262 11.6.2.1 Keywords\n\n    function isKeyword(id) {\n        switch (id.length) {\n        case 2:\n            return (id === 'if') || (id === 'in') || (id === 'do');\n        case 3:\n            return (id === 'var') || (id === 'for') || (id === 'new') ||\n                (id === 'try') || (id === 'let');\n        case 4:\n            return (id === 'this') || (id === 'else') || (id === 'case') ||\n                (id === 'void') || (id === 'with') || (id === 'enum');\n        case 5:\n            return (id === 'while') || (id === 'break') || (id === 'catch') ||\n                (id === 'throw') || (id === 'const') || (id === 'yield') ||\n                (id === 'class') || (id === 'super');\n        case 6:\n            return (id === 'return') || (id === 'typeof') || (id === 'delete') ||\n                (id === 'switch') || (id === 'export') || (id === 'import');\n        case 7:\n            return (id === 'default') || (id === 'finally') || (id === 'extends');\n        case 8:\n            return (id === 'function') || (id === 'continue') || (id === 'debugger');\n        case 10:\n            return (id === 'instanceof');\n        default:\n            return false;\n        }\n    }\n\n    // ECMA-262 11.4 Comments\n\n    function addComment(type, value, start, end, loc) {\n        var comment;\n\n        assert(typeof start === 'number', 'Comment must have valid position');\n\n        state.lastCommentStart = start;\n\n        comment = {\n            type: type,\n            value: value\n        };\n        if (extra.range) {\n            comment.range = [start, end];\n        }\n        if (extra.loc) {\n            comment.loc = loc;\n        }\n        extra.comments.push(comment);\n        if (extra.attachComment) {\n            extra.leadingComments.push(comment);\n            extra.trailingComments.push(comment);\n        }\n        if (extra.tokenize) {\n            comment.type = comment.type + 'Comment';\n            if (extra.delegate) {\n                comment = extra.delegate(comment);\n            }\n            extra.tokens.push(comment);\n        }\n    }\n\n    function skipSingleLineComment(offset) {\n        var start, loc, ch, comment;\n\n        start = index - offset;\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart - offset\n            }\n        };\n\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            ++index;\n            if (isLineTerminator(ch)) {\n                hasLineTerminator = true;\n                if (extra.comments) {\n                    comment = source.slice(start + offset, index - 1);\n                    loc.end = {\n                        line: lineNumber,\n                        column: index - lineStart - 1\n                    };\n                    addComment('Line', comment, start, index - 1, loc);\n                }\n                if (ch === 13 && source.charCodeAt(index) === 10) {\n                    ++index;\n                }\n                ++lineNumber;\n                lineStart = index;\n                return;\n            }\n        }\n\n        if (extra.comments) {\n            comment = source.slice(start + offset, index);\n            loc.end = {\n                line: lineNumber,\n                column: index - lineStart\n            };\n            addComment('Line', comment, start, index, loc);\n        }\n    }\n\n    function skipMultiLineComment() {\n        var start, loc, ch, comment;\n\n        if (extra.comments) {\n            start = index - 2;\n            loc = {\n                start: {\n                    line: lineNumber,\n                    column: index - lineStart - 2\n                }\n            };\n        }\n\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (isLineTerminator(ch)) {\n                if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) {\n                    ++index;\n                }\n                hasLineTerminator = true;\n                ++lineNumber;\n                ++index;\n                lineStart = index;\n            } else if (ch === 0x2A) {\n                // Block comment ends with '*/'.\n                if (source.charCodeAt(index + 1) === 0x2F) {\n                    ++index;\n                    ++index;\n                    if (extra.comments) {\n                        comment = source.slice(start + 2, index - 2);\n                        loc.end = {\n                            line: lineNumber,\n                            column: index - lineStart\n                        };\n                        addComment('Block', comment, start, index, loc);\n                    }\n                    return;\n                }\n                ++index;\n            } else {\n                ++index;\n            }\n        }\n\n        // Ran off the end of the file - the whole thing is a comment\n        if (extra.comments) {\n            loc.end = {\n                line: lineNumber,\n                column: index - lineStart\n            };\n            comment = source.slice(start + 2, index);\n            addComment('Block', comment, start, index, loc);\n        }\n        tolerateUnexpectedToken();\n    }\n\n    function skipComment() {\n        var ch, start;\n        hasLineTerminator = false;\n\n        start = (index === 0);\n        while (index < length) {\n            ch = source.charCodeAt(index);\n\n            if (isWhiteSpace(ch)) {\n                ++index;\n            } else if (isLineTerminator(ch)) {\n                hasLineTerminator = true;\n                ++index;\n                if (ch === 0x0D && source.charCodeAt(index) === 0x0A) {\n                    ++index;\n                }\n                ++lineNumber;\n                lineStart = index;\n                start = true;\n            } else if (ch === 0x2F) { // U+002F is '/'\n                ch = source.charCodeAt(index + 1);\n                if (ch === 0x2F) {\n                    ++index;\n                    ++index;\n                    skipSingleLineComment(2);\n                    start = true;\n                } else if (ch === 0x2A) {  // U+002A is '*'\n                    ++index;\n                    ++index;\n                    skipMultiLineComment();\n                } else {\n                    break;\n                }\n            } else if (start && ch === 0x2D) { // U+002D is '-'\n                // U+003E is '>'\n                if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) {\n                    // '-->' is a single-line comment\n                    index += 3;\n                    skipSingleLineComment(3);\n                } else {\n                    break;\n                }\n            } else if (ch === 0x3C) { // U+003C is '<'\n                if (source.slice(index + 1, index + 4) === '!--') {\n                    ++index; // `<`\n                    ++index; // `!`\n                    ++index; // `-`\n                    ++index; // `-`\n                    skipSingleLineComment(4);\n                } else {\n                    break;\n                }\n            } else {\n                break;\n            }\n        }\n    }\n\n    function scanHexEscape(prefix) {\n        var i, len, ch, code = 0;\n\n        len = (prefix === 'u') ? 4 : 2;\n        for (i = 0; i < len; ++i) {\n            if (index < length && isHexDigit(source[index])) {\n                ch = source[index++];\n                code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());\n            } else {\n                return '';\n            }\n        }\n        return String.fromCharCode(code);\n    }\n\n    function scanUnicodeCodePointEscape() {\n        var ch, code;\n\n        ch = source[index];\n        code = 0;\n\n        // At least, one hex digit is required.\n        if (ch === '}') {\n            throwUnexpectedToken();\n        }\n\n        while (index < length) {\n            ch = source[index++];\n            if (!isHexDigit(ch)) {\n                break;\n            }\n            code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());\n        }\n\n        if (code > 0x10FFFF || ch !== '}') {\n            throwUnexpectedToken();\n        }\n\n        return fromCodePoint(code);\n    }\n\n    function codePointAt(i) {\n        var cp, first, second;\n\n        cp = source.charCodeAt(i);\n        if (cp >= 0xD800 && cp <= 0xDBFF) {\n            second = source.charCodeAt(i + 1);\n            if (second >= 0xDC00 && second <= 0xDFFF) {\n                first = cp;\n                cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;\n            }\n        }\n\n        return cp;\n    }\n\n    function getComplexIdentifier() {\n        var cp, ch, id;\n\n        cp = codePointAt(index);\n        id = fromCodePoint(cp);\n        index += id.length;\n\n        // '\\u' (U+005C, U+0075) denotes an escaped character.\n        if (cp === 0x5C) {\n            if (source.charCodeAt(index) !== 0x75) {\n                throwUnexpectedToken();\n            }\n            ++index;\n            if (source[index] === '{') {\n                ++index;\n                ch = scanUnicodeCodePointEscape();\n            } else {\n                ch = scanHexEscape('u');\n                cp = ch.charCodeAt(0);\n                if (!ch || ch === '\\\\' || !isIdentifierStart(cp)) {\n                    throwUnexpectedToken();\n                }\n            }\n            id = ch;\n        }\n\n        while (index < length) {\n            cp = codePointAt(index);\n            if (!isIdentifierPart(cp)) {\n                break;\n            }\n            ch = fromCodePoint(cp);\n            id += ch;\n            index += ch.length;\n\n            // '\\u' (U+005C, U+0075) denotes an escaped character.\n            if (cp === 0x5C) {\n                id = id.substr(0, id.length - 1);\n                if (source.charCodeAt(index) !== 0x75) {\n                    throwUnexpectedToken();\n                }\n                ++index;\n                if (source[index] === '{') {\n                    ++index;\n                    ch = scanUnicodeCodePointEscape();\n                } else {\n                    ch = scanHexEscape('u');\n                    cp = ch.charCodeAt(0);\n                    if (!ch || ch === '\\\\' || !isIdentifierPart(cp)) {\n                        throwUnexpectedToken();\n                    }\n                }\n                id += ch;\n            }\n        }\n\n        return id;\n    }\n\n    function getIdentifier() {\n        var start, ch;\n\n        start = index++;\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (ch === 0x5C) {\n                // Blackslash (U+005C) marks Unicode escape sequence.\n                index = start;\n                return getComplexIdentifier();\n            } else if (ch >= 0xD800 && ch < 0xDFFF) {\n                // Need to handle surrogate pairs.\n                index = start;\n                return getComplexIdentifier();\n            }\n            if (isIdentifierPart(ch)) {\n                ++index;\n            } else {\n                break;\n            }\n        }\n\n        return source.slice(start, index);\n    }\n\n    function scanIdentifier() {\n        var start, id, type;\n\n        start = index;\n\n        // Backslash (U+005C) starts an escaped character.\n        id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : getIdentifier();\n\n        // There is no keyword or literal with only one character.\n        // Thus, it must be an identifier.\n        if (id.length === 1) {\n            type = Token.Identifier;\n        } else if (isKeyword(id)) {\n            type = Token.Keyword;\n        } else if (id === 'null') {\n            type = Token.NullLiteral;\n        } else if (id === 'true' || id === 'false') {\n            type = Token.BooleanLiteral;\n        } else {\n            type = Token.Identifier;\n        }\n\n        return {\n            type: type,\n            value: id,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n\n    // ECMA-262 11.7 Punctuators\n\n    function scanPunctuator() {\n        var token, str;\n\n        token = {\n            type: Token.Punctuator,\n            value: '',\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: index,\n            end: index\n        };\n\n        // Check for most common single-character punctuators.\n        str = source[index];\n        switch (str) {\n\n        case '(':\n            if (extra.tokenize) {\n                extra.openParenToken = extra.tokenValues.length;\n            }\n            ++index;\n            break;\n\n        case '{':\n            if (extra.tokenize) {\n                extra.openCurlyToken = extra.tokenValues.length;\n            }\n            state.curlyStack.push('{');\n            ++index;\n            break;\n\n        case '.':\n            ++index;\n            if (source[index] === '.' && source[index + 1] === '.') {\n                // Spread operator: ...\n                index += 2;\n                str = '...';\n            }\n            break;\n\n        case '}':\n            ++index;\n            state.curlyStack.pop();\n            break;\n        case ')':\n        case ';':\n        case ',':\n        case '[':\n        case ']':\n        case ':':\n        case '?':\n        case '~':\n            ++index;\n            break;\n\n        default:\n            // 4-character punctuator.\n            str = source.substr(index, 4);\n            if (str === '>>>=') {\n                index += 4;\n            } else {\n\n                // 3-character punctuators.\n                str = str.substr(0, 3);\n                if (str === '===' || str === '!==' || str === '>>>' ||\n                    str === '<<=' || str === '>>=') {\n                    index += 3;\n                } else {\n\n                    // 2-character punctuators.\n                    str = str.substr(0, 2);\n                    if (str === '&&' || str === '||' || str === '==' || str === '!=' ||\n                        str === '+=' || str === '-=' || str === '*=' || str === '/=' ||\n                        str === '++' || str === '--' || str === '<<' || str === '>>' ||\n                        str === '&=' || str === '|=' || str === '^=' || str === '%=' ||\n                        str === '<=' || str === '>=' || str === '=>') {\n                        index += 2;\n                    } else {\n\n                        // 1-character punctuators.\n                        str = source[index];\n                        if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {\n                            ++index;\n                        }\n                    }\n                }\n            }\n        }\n\n        if (index === token.start) {\n            throwUnexpectedToken();\n        }\n\n        token.end = index;\n        token.value = str;\n        return token;\n    }\n\n    // ECMA-262 11.8.3 Numeric Literals\n\n    function scanHexLiteral(start) {\n        var number = '';\n\n        while (index < length) {\n            if (!isHexDigit(source[index])) {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (number.length === 0) {\n            throwUnexpectedToken();\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt('0x' + number, 16),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function scanBinaryLiteral(start) {\n        var ch, number;\n\n        number = '';\n\n        while (index < length) {\n            ch = source[index];\n            if (ch !== '0' && ch !== '1') {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (number.length === 0) {\n            // only 0b or 0B\n            throwUnexpectedToken();\n        }\n\n        if (index < length) {\n            ch = source.charCodeAt(index);\n            /* istanbul ignore else */\n            if (isIdentifierStart(ch) || isDecimalDigit(ch)) {\n                throwUnexpectedToken();\n            }\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt(number, 2),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function scanOctalLiteral(prefix, start) {\n        var number, octal;\n\n        if (isOctalDigit(prefix)) {\n            octal = true;\n            number = '0' + source[index++];\n        } else {\n            octal = false;\n            ++index;\n            number = '';\n        }\n\n        while (index < length) {\n            if (!isOctalDigit(source[index])) {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (!octal && number.length === 0) {\n            // only 0o or 0O\n            throwUnexpectedToken();\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt(number, 8),\n            octal: octal,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function isImplicitOctalLiteral() {\n        var i, ch;\n\n        // Implicit octal, unless there is a non-octal digit.\n        // (Annex B.1.1 on Numeric Literals)\n        for (i = index + 1; i < length; ++i) {\n            ch = source[i];\n            if (ch === '8' || ch === '9') {\n                return false;\n            }\n            if (!isOctalDigit(ch)) {\n                return true;\n            }\n        }\n\n        return true;\n    }\n\n    function scanNumericLiteral() {\n        var number, start, ch;\n\n        ch = source[index];\n        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),\n            'Numeric literal must start with a decimal digit or a decimal point');\n\n        start = index;\n        number = '';\n        if (ch !== '.') {\n            number = source[index++];\n            ch = source[index];\n\n            // Hex number starts with '0x'.\n            // Octal number starts with '0'.\n            // Octal number in ES6 starts with '0o'.\n            // Binary number in ES6 starts with '0b'.\n            if (number === '0') {\n                if (ch === 'x' || ch === 'X') {\n                    ++index;\n                    return scanHexLiteral(start);\n                }\n                if (ch === 'b' || ch === 'B') {\n                    ++index;\n                    return scanBinaryLiteral(start);\n                }\n                if (ch === 'o' || ch === 'O') {\n                    return scanOctalLiteral(ch, start);\n                }\n\n                if (isOctalDigit(ch)) {\n                    if (isImplicitOctalLiteral()) {\n                        return scanOctalLiteral(ch, start);\n                    }\n                }\n            }\n\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === '.') {\n            number += source[index++];\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === 'e' || ch === 'E') {\n            number += source[index++];\n\n            ch = source[index];\n            if (ch === '+' || ch === '-') {\n                number += source[index++];\n            }\n            if (isDecimalDigit(source.charCodeAt(index))) {\n                while (isDecimalDigit(source.charCodeAt(index))) {\n                    number += source[index++];\n                }\n            } else {\n                throwUnexpectedToken();\n            }\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseFloat(number),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.4 String Literals\n\n    function scanStringLiteral() {\n        var str = '', quote, start, ch, unescaped, octToDec, octal = false;\n\n        quote = source[index];\n        assert((quote === '\\'' || quote === '\"'),\n            'String literal must starts with a quote');\n\n        start = index;\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n\n            if (ch === quote) {\n                quote = '';\n                break;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'u':\n                    case 'x':\n                        if (source[index] === '{') {\n                            ++index;\n                            str += scanUnicodeCodePointEscape();\n                        } else {\n                            unescaped = scanHexEscape(ch);\n                            if (!unescaped) {\n                                throw throwUnexpectedToken();\n                            }\n                            str += unescaped;\n                        }\n                        break;\n                    case 'n':\n                        str += '\\n';\n                        break;\n                    case 'r':\n                        str += '\\r';\n                        break;\n                    case 't':\n                        str += '\\t';\n                        break;\n                    case 'b':\n                        str += '\\b';\n                        break;\n                    case 'f':\n                        str += '\\f';\n                        break;\n                    case 'v':\n                        str += '\\x0B';\n                        break;\n                    case '8':\n                    case '9':\n                        str += ch;\n                        tolerateUnexpectedToken();\n                        break;\n\n                    default:\n                        if (isOctalDigit(ch)) {\n                            octToDec = octalToDecimal(ch);\n\n                            octal = octToDec.octal || octal;\n                            str += String.fromCharCode(octToDec.code);\n                        } else {\n                            str += ch;\n                        }\n                        break;\n                    }\n                } else {\n                    ++lineNumber;\n                    if (ch === '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                    lineStart = index;\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                break;\n            } else {\n                str += ch;\n            }\n        }\n\n        if (quote !== '') {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.StringLiteral,\n            value: str,\n            octal: octal,\n            lineNumber: startLineNumber,\n            lineStart: startLineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.6 Template Literal Lexical Components\n\n    function scanTemplate() {\n        var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped;\n\n        terminated = false;\n        tail = false;\n        start = index;\n        head = (source[index] === '`');\n        rawOffset = 2;\n\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n            if (ch === '`') {\n                rawOffset = 1;\n                tail = true;\n                terminated = true;\n                break;\n            } else if (ch === '$') {\n                if (source[index] === '{') {\n                    state.curlyStack.push('${');\n                    ++index;\n                    terminated = true;\n                    break;\n                }\n                cooked += ch;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'n':\n                        cooked += '\\n';\n                        break;\n                    case 'r':\n                        cooked += '\\r';\n                        break;\n                    case 't':\n                        cooked += '\\t';\n                        break;\n                    case 'u':\n                    case 'x':\n                        if (source[index] === '{') {\n                            ++index;\n                            cooked += scanUnicodeCodePointEscape();\n                        } else {\n                            restore = index;\n                            unescaped = scanHexEscape(ch);\n                            if (unescaped) {\n                                cooked += unescaped;\n                            } else {\n                                index = restore;\n                                cooked += ch;\n                            }\n                        }\n                        break;\n                    case 'b':\n                        cooked += '\\b';\n                        break;\n                    case 'f':\n                        cooked += '\\f';\n                        break;\n                    case 'v':\n                        cooked += '\\v';\n                        break;\n\n                    default:\n                        if (ch === '0') {\n                            if (isDecimalDigit(source.charCodeAt(index))) {\n                                // Illegal: \\01 \\02 and so on\n                                throwError(Messages.TemplateOctalLiteral);\n                            }\n                            cooked += '\\0';\n                        } else if (isOctalDigit(ch)) {\n                            // Illegal: \\1 \\2\n                            throwError(Messages.TemplateOctalLiteral);\n                        } else {\n                            cooked += ch;\n                        }\n                        break;\n                    }\n                } else {\n                    ++lineNumber;\n                    if (ch === '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                    lineStart = index;\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                ++lineNumber;\n                if (ch === '\\r' && source[index] === '\\n') {\n                    ++index;\n                }\n                lineStart = index;\n                cooked += '\\n';\n            } else {\n                cooked += ch;\n            }\n        }\n\n        if (!terminated) {\n            throwUnexpectedToken();\n        }\n\n        if (!head) {\n            state.curlyStack.pop();\n        }\n\n        return {\n            type: Token.Template,\n            value: {\n                cooked: cooked,\n                raw: source.slice(start + 1, index - rawOffset)\n            },\n            head: head,\n            tail: tail,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.5 Regular Expression Literals\n\n    function testRegExp(pattern, flags) {\n        // The BMP character to use as a replacement for astral symbols when\n        // translating an ES6 \"u\"-flagged pattern to an ES5-compatible\n        // approximation.\n        // Note: replacing with '\\uFFFF' enables false positives in unlikely\n        // scenarios. For example, `[\\u{1044f}-\\u{10440}]` is an invalid\n        // pattern that would not be detected by this substitution.\n        var astralSubstitute = '\\uFFFF',\n            tmp = pattern;\n\n        if (flags.indexOf('u') >= 0) {\n            tmp = tmp\n                // Replace every Unicode escape sequence with the equivalent\n                // BMP character or a constant ASCII code point in the case of\n                // astral symbols. (See the above note on `astralSubstitute`\n                // for more information.)\n                .replace(/\\\\u\\{([0-9a-fA-F]+)\\}|\\\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) {\n                    var codePoint = parseInt($1 || $2, 16);\n                    if (codePoint > 0x10FFFF) {\n                        throwUnexpectedToken(null, Messages.InvalidRegExp);\n                    }\n                    if (codePoint <= 0xFFFF) {\n                        return String.fromCharCode(codePoint);\n                    }\n                    return astralSubstitute;\n                })\n                // Replace each paired surrogate with a single ASCII symbol to\n                // avoid throwing on regular expressions that are only valid in\n                // combination with the \"u\" flag.\n                .replace(\n                    /[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]/g,\n                    astralSubstitute\n                );\n        }\n\n        // First, detect invalid regular expressions.\n        try {\n            RegExp(tmp);\n        } catch (e) {\n            throwUnexpectedToken(null, Messages.InvalidRegExp);\n        }\n\n        // Return a regular expression object for this pattern-flag pair, or\n        // `null` in case the current environment doesn't support the flags it\n        // uses.\n        try {\n            return new RegExp(pattern, flags);\n        } catch (exception) {\n            return null;\n        }\n    }\n\n    function scanRegExpBody() {\n        var ch, str, classMarker, terminated, body;\n\n        ch = source[index];\n        assert(ch === '/', 'Regular expression literal must start with a slash');\n        str = source[index++];\n\n        classMarker = false;\n        terminated = false;\n        while (index < length) {\n            ch = source[index++];\n            str += ch;\n            if (ch === '\\\\') {\n                ch = source[index++];\n                // ECMA-262 7.8.5\n                if (isLineTerminator(ch.charCodeAt(0))) {\n                    throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n                }\n                str += ch;\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n            } else if (classMarker) {\n                if (ch === ']') {\n                    classMarker = false;\n                }\n            } else {\n                if (ch === '/') {\n                    terminated = true;\n                    break;\n                } else if (ch === '[') {\n                    classMarker = true;\n                }\n            }\n        }\n\n        if (!terminated) {\n            throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n        }\n\n        // Exclude leading and trailing slash.\n        body = str.substr(1, str.length - 2);\n        return {\n            value: body,\n            literal: str\n        };\n    }\n\n    function scanRegExpFlags() {\n        var ch, str, flags, restore;\n\n        str = '';\n        flags = '';\n        while (index < length) {\n            ch = source[index];\n            if (!isIdentifierPart(ch.charCodeAt(0))) {\n                break;\n            }\n\n            ++index;\n            if (ch === '\\\\' && index < length) {\n                ch = source[index];\n                if (ch === 'u') {\n                    ++index;\n                    restore = index;\n                    ch = scanHexEscape('u');\n                    if (ch) {\n                        flags += ch;\n                        for (str += '\\\\u'; restore < index; ++restore) {\n                            str += source[restore];\n                        }\n                    } else {\n                        index = restore;\n                        flags += 'u';\n                        str += '\\\\u';\n                    }\n                    tolerateUnexpectedToken();\n                } else {\n                    str += '\\\\';\n                    tolerateUnexpectedToken();\n                }\n            } else {\n                flags += ch;\n                str += ch;\n            }\n        }\n\n        return {\n            value: flags,\n            literal: str\n        };\n    }\n\n    function scanRegExp() {\n        var start, body, flags, value;\n        scanning = true;\n\n        lookahead = null;\n        skipComment();\n        start = index;\n\n        body = scanRegExpBody();\n        flags = scanRegExpFlags();\n        value = testRegExp(body.value, flags.value);\n        scanning = false;\n        if (extra.tokenize) {\n            return {\n                type: Token.RegularExpression,\n                value: value,\n                regex: {\n                    pattern: body.value,\n                    flags: flags.value\n                },\n                lineNumber: lineNumber,\n                lineStart: lineStart,\n                start: start,\n                end: index\n            };\n        }\n\n        return {\n            literal: body.literal + flags.literal,\n            value: value,\n            regex: {\n                pattern: body.value,\n                flags: flags.value\n            },\n            start: start,\n            end: index\n        };\n    }\n\n    function collectRegex() {\n        var pos, loc, regex, token;\n\n        skipComment();\n\n        pos = index;\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart\n            }\n        };\n\n        regex = scanRegExp();\n\n        loc.end = {\n            line: lineNumber,\n            column: index - lineStart\n        };\n\n        /* istanbul ignore next */\n        if (!extra.tokenize) {\n            // Pop the previous token, which is likely '/' or '/='\n            if (extra.tokens.length > 0) {\n                token = extra.tokens[extra.tokens.length - 1];\n                if (token.range[0] === pos && token.type === 'Punctuator') {\n                    if (token.value === '/' || token.value === '/=') {\n                        extra.tokens.pop();\n                    }\n                }\n            }\n\n            extra.tokens.push({\n                type: 'RegularExpression',\n                value: regex.literal,\n                regex: regex.regex,\n                range: [pos, index],\n                loc: loc\n            });\n        }\n\n        return regex;\n    }\n\n    function isIdentifierName(token) {\n        return token.type === Token.Identifier ||\n            token.type === Token.Keyword ||\n            token.type === Token.BooleanLiteral ||\n            token.type === Token.NullLiteral;\n    }\n\n    // Using the following algorithm:\n    // https://github.com/mozilla/sweet.js/wiki/design\n\n    function advanceSlash() {\n        var regex, previous, check;\n\n        function testKeyword(value) {\n            return value && (value.length > 1) && (value[0] >= 'a') && (value[0] <= 'z');\n        }\n\n        previous = extra.tokenValues[extra.tokens.length - 1];\n        regex = (previous !== null);\n\n        switch (previous) {\n        case 'this':\n        case ']':\n            regex = false;\n            break;\n\n        case ')':\n            check = extra.tokenValues[extra.openParenToken - 1];\n            regex = (check === 'if' || check === 'while' || check === 'for' || check === 'with');\n            break;\n\n        case '}':\n            // Dividing a function by anything makes little sense,\n            // but we have to check for that.\n            regex = false;\n            if (testKeyword(extra.tokenValues[extra.openCurlyToken - 3])) {\n                // Anonymous function, e.g. function(){} /42\n                check = extra.tokenValues[extra.openCurlyToken - 4];\n                regex = check ? (FnExprTokens.indexOf(check) < 0) : false;\n            } else if (testKeyword(extra.tokenValues[extra.openCurlyToken - 4])) {\n                // Named function, e.g. function f(){} /42/\n                check = extra.tokenValues[extra.openCurlyToken - 5];\n                regex = check ? (FnExprTokens.indexOf(check) < 0) : true;\n            }\n        }\n\n        return regex ? collectRegex() : scanPunctuator();\n    }\n\n    function advance() {\n        var cp, token;\n\n        if (index >= length) {\n            return {\n                type: Token.EOF,\n                lineNumber: lineNumber,\n                lineStart: lineStart,\n                start: index,\n                end: index\n            };\n        }\n\n        cp = source.charCodeAt(index);\n\n        if (isIdentifierStart(cp)) {\n            token = scanIdentifier();\n            if (strict && isStrictModeReservedWord(token.value)) {\n                token.type = Token.Keyword;\n            }\n            return token;\n        }\n\n        // Very common: ( and ) and ;\n        if (cp === 0x28 || cp === 0x29 || cp === 0x3B) {\n            return scanPunctuator();\n        }\n\n        // String literal starts with single quote (U+0027) or double quote (U+0022).\n        if (cp === 0x27 || cp === 0x22) {\n            return scanStringLiteral();\n        }\n\n        // Dot (.) U+002E can also start a floating-point number, hence the need\n        // to check the next character.\n        if (cp === 0x2E) {\n            if (isDecimalDigit(source.charCodeAt(index + 1))) {\n                return scanNumericLiteral();\n            }\n            return scanPunctuator();\n        }\n\n        if (isDecimalDigit(cp)) {\n            return scanNumericLiteral();\n        }\n\n        // Slash (/) U+002F can also start a regex.\n        if (extra.tokenize && cp === 0x2F) {\n            return advanceSlash();\n        }\n\n        // Template literals start with ` (U+0060) for template head\n        // or } (U+007D) for template middle or template tail.\n        if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) {\n            return scanTemplate();\n        }\n\n        // Possible identifier start in a surrogate pair.\n        if (cp >= 0xD800 && cp < 0xDFFF) {\n            cp = codePointAt(index);\n            if (isIdentifierStart(cp)) {\n                return scanIdentifier();\n            }\n        }\n\n        return scanPunctuator();\n    }\n\n    function collectToken() {\n        var loc, token, value, entry;\n\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart\n            }\n        };\n\n        token = advance();\n        loc.end = {\n            line: lineNumber,\n            column: index - lineStart\n        };\n\n        if (token.type !== Token.EOF) {\n            value = source.slice(token.start, token.end);\n            entry = {\n                type: TokenName[token.type],\n                value: value,\n                range: [token.start, token.end],\n                loc: loc\n            };\n            if (token.regex) {\n                entry.regex = {\n                    pattern: token.regex.pattern,\n                    flags: token.regex.flags\n                };\n            }\n            if (extra.tokenValues) {\n                extra.tokenValues.push((entry.type === 'Punctuator' || entry.type === 'Keyword') ? entry.value : null);\n            }\n            if (extra.tokenize) {\n                if (!extra.range) {\n                    delete entry.range;\n                }\n                if (!extra.loc) {\n                    delete entry.loc;\n                }\n                if (extra.delegate) {\n                    entry = extra.delegate(entry);\n                }\n            }\n            extra.tokens.push(entry);\n        }\n\n        return token;\n    }\n\n    function lex() {\n        var token;\n        scanning = true;\n\n        lastIndex = index;\n        lastLineNumber = lineNumber;\n        lastLineStart = lineStart;\n\n        skipComment();\n\n        token = lookahead;\n\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n\n        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();\n        scanning = false;\n        return token;\n    }\n\n    function peek() {\n        scanning = true;\n\n        skipComment();\n\n        lastIndex = index;\n        lastLineNumber = lineNumber;\n        lastLineStart = lineStart;\n\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n\n        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();\n        scanning = false;\n    }\n\n    function Position() {\n        this.line = startLineNumber;\n        this.column = startIndex - startLineStart;\n    }\n\n    function SourceLocation() {\n        this.start = new Position();\n        this.end = null;\n    }\n\n    function WrappingSourceLocation(startToken) {\n        this.start = {\n            line: startToken.lineNumber,\n            column: startToken.start - startToken.lineStart\n        };\n        this.end = null;\n    }\n\n    function Node() {\n        if (extra.range) {\n            this.range = [startIndex, 0];\n        }\n        if (extra.loc) {\n            this.loc = new SourceLocation();\n        }\n    }\n\n    function WrappingNode(startToken) {\n        if (extra.range) {\n            this.range = [startToken.start, 0];\n        }\n        if (extra.loc) {\n            this.loc = new WrappingSourceLocation(startToken);\n        }\n    }\n\n    WrappingNode.prototype = Node.prototype = {\n\n        processComment: function () {\n            var lastChild,\n                innerComments,\n                leadingComments,\n                trailingComments,\n                bottomRight = extra.bottomRightStack,\n                i,\n                comment,\n                last = bottomRight[bottomRight.length - 1];\n\n            if (this.type === Syntax.Program) {\n                if (this.body.length > 0) {\n                    return;\n                }\n            }\n            /**\n             * patch innnerComments for properties empty block\n             * `function a() {/** comments **\\/}`\n             */\n\n            if (this.type === Syntax.BlockStatement && this.body.length === 0) {\n                innerComments = [];\n                for (i = extra.leadingComments.length - 1; i >= 0; --i) {\n                    comment = extra.leadingComments[i];\n                    if (this.range[1] >= comment.range[1]) {\n                        innerComments.unshift(comment);\n                        extra.leadingComments.splice(i, 1);\n                        extra.trailingComments.splice(i, 1);\n                    }\n                }\n                if (innerComments.length) {\n                    this.innerComments = innerComments;\n                    //bottomRight.push(this);\n                    return;\n                }\n            }\n\n            if (extra.trailingComments.length > 0) {\n                trailingComments = [];\n                for (i = extra.trailingComments.length - 1; i >= 0; --i) {\n                    comment = extra.trailingComments[i];\n                    if (comment.range[0] >= this.range[1]) {\n                        trailingComments.unshift(comment);\n                        extra.trailingComments.splice(i, 1);\n                    }\n                }\n                extra.trailingComments = [];\n            } else {\n                if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) {\n                    trailingComments = last.trailingComments;\n                    delete last.trailingComments;\n                }\n            }\n\n            // Eating the stack.\n            while (last && last.range[0] >= this.range[0]) {\n                lastChild = bottomRight.pop();\n                last = bottomRight[bottomRight.length - 1];\n            }\n\n            if (lastChild) {\n                if (lastChild.leadingComments) {\n                    leadingComments = [];\n                    for (i = lastChild.leadingComments.length - 1; i >= 0; --i) {\n                        comment = lastChild.leadingComments[i];\n                        if (comment.range[1] <= this.range[0]) {\n                            leadingComments.unshift(comment);\n                            lastChild.leadingComments.splice(i, 1);\n                        }\n                    }\n\n                    if (!lastChild.leadingComments.length) {\n                        lastChild.leadingComments = undefined;\n                    }\n                }\n            } else if (extra.leadingComments.length > 0) {\n                leadingComments = [];\n                for (i = extra.leadingComments.length - 1; i >= 0; --i) {\n                    comment = extra.leadingComments[i];\n                    if (comment.range[1] <= this.range[0]) {\n                        leadingComments.unshift(comment);\n                        extra.leadingComments.splice(i, 1);\n                    }\n                }\n            }\n\n\n            if (leadingComments && leadingComments.length > 0) {\n                this.leadingComments = leadingComments;\n            }\n            if (trailingComments && trailingComments.length > 0) {\n                this.trailingComments = trailingComments;\n            }\n\n            bottomRight.push(this);\n        },\n\n        finish: function () {\n            if (extra.range) {\n                this.range[1] = lastIndex;\n            }\n            if (extra.loc) {\n                this.loc.end = {\n                    line: lastLineNumber,\n                    column: lastIndex - lastLineStart\n                };\n                if (extra.source) {\n                    this.loc.source = extra.source;\n                }\n            }\n\n            if (extra.attachComment) {\n                this.processComment();\n            }\n        },\n\n        finishArrayExpression: function (elements) {\n            this.type = Syntax.ArrayExpression;\n            this.elements = elements;\n            this.finish();\n            return this;\n        },\n\n        finishArrayPattern: function (elements) {\n            this.type = Syntax.ArrayPattern;\n            this.elements = elements;\n            this.finish();\n            return this;\n        },\n\n        finishArrowFunctionExpression: function (params, defaults, body, expression) {\n            this.type = Syntax.ArrowFunctionExpression;\n            this.id = null;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = false;\n            this.expression = expression;\n            this.finish();\n            return this;\n        },\n\n        finishAssignmentExpression: function (operator, left, right) {\n            this.type = Syntax.AssignmentExpression;\n            this.operator = operator;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishAssignmentPattern: function (left, right) {\n            this.type = Syntax.AssignmentPattern;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishBinaryExpression: function (operator, left, right) {\n            this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression;\n            this.operator = operator;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishBlockStatement: function (body) {\n            this.type = Syntax.BlockStatement;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishBreakStatement: function (label) {\n            this.type = Syntax.BreakStatement;\n            this.label = label;\n            this.finish();\n            return this;\n        },\n\n        finishCallExpression: function (callee, args) {\n            this.type = Syntax.CallExpression;\n            this.callee = callee;\n            this.arguments = args;\n            this.finish();\n            return this;\n        },\n\n        finishCatchClause: function (param, body) {\n            this.type = Syntax.CatchClause;\n            this.param = param;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassBody: function (body) {\n            this.type = Syntax.ClassBody;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassDeclaration: function (id, superClass, body) {\n            this.type = Syntax.ClassDeclaration;\n            this.id = id;\n            this.superClass = superClass;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassExpression: function (id, superClass, body) {\n            this.type = Syntax.ClassExpression;\n            this.id = id;\n            this.superClass = superClass;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishConditionalExpression: function (test, consequent, alternate) {\n            this.type = Syntax.ConditionalExpression;\n            this.test = test;\n            this.consequent = consequent;\n            this.alternate = alternate;\n            this.finish();\n            return this;\n        },\n\n        finishContinueStatement: function (label) {\n            this.type = Syntax.ContinueStatement;\n            this.label = label;\n            this.finish();\n            return this;\n        },\n\n        finishDebuggerStatement: function () {\n            this.type = Syntax.DebuggerStatement;\n            this.finish();\n            return this;\n        },\n\n        finishDoWhileStatement: function (body, test) {\n            this.type = Syntax.DoWhileStatement;\n            this.body = body;\n            this.test = test;\n            this.finish();\n            return this;\n        },\n\n        finishEmptyStatement: function () {\n            this.type = Syntax.EmptyStatement;\n            this.finish();\n            return this;\n        },\n\n        finishExpressionStatement: function (expression) {\n            this.type = Syntax.ExpressionStatement;\n            this.expression = expression;\n            this.finish();\n            return this;\n        },\n\n        finishForStatement: function (init, test, update, body) {\n            this.type = Syntax.ForStatement;\n            this.init = init;\n            this.test = test;\n            this.update = update;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishForOfStatement: function (left, right, body) {\n            this.type = Syntax.ForOfStatement;\n            this.left = left;\n            this.right = right;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishForInStatement: function (left, right, body) {\n            this.type = Syntax.ForInStatement;\n            this.left = left;\n            this.right = right;\n            this.body = body;\n            this.each = false;\n            this.finish();\n            return this;\n        },\n\n        finishFunctionDeclaration: function (id, params, defaults, body, generator) {\n            this.type = Syntax.FunctionDeclaration;\n            this.id = id;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = generator;\n            this.expression = false;\n            this.finish();\n            return this;\n        },\n\n        finishFunctionExpression: function (id, params, defaults, body, generator) {\n            this.type = Syntax.FunctionExpression;\n            this.id = id;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = generator;\n            this.expression = false;\n            this.finish();\n            return this;\n        },\n\n        finishIdentifier: function (name) {\n            this.type = Syntax.Identifier;\n            this.name = name;\n            this.finish();\n            return this;\n        },\n\n        finishIfStatement: function (test, consequent, alternate) {\n            this.type = Syntax.IfStatement;\n            this.test = test;\n            this.consequent = consequent;\n            this.alternate = alternate;\n            this.finish();\n            return this;\n        },\n\n        finishLabeledStatement: function (label, body) {\n            this.type = Syntax.LabeledStatement;\n            this.label = label;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishLiteral: function (token) {\n            this.type = Syntax.Literal;\n            this.value = token.value;\n            this.raw = source.slice(token.start, token.end);\n            if (token.regex) {\n                this.regex = token.regex;\n            }\n            this.finish();\n            return this;\n        },\n\n        finishMemberExpression: function (accessor, object, property) {\n            this.type = Syntax.MemberExpression;\n            this.computed = accessor === '[';\n            this.object = object;\n            this.property = property;\n            this.finish();\n            return this;\n        },\n\n        finishMetaProperty: function (meta, property) {\n            this.type = Syntax.MetaProperty;\n            this.meta = meta;\n            this.property = property;\n            this.finish();\n            return this;\n        },\n\n        finishNewExpression: function (callee, args) {\n            this.type = Syntax.NewExpression;\n            this.callee = callee;\n            this.arguments = args;\n            this.finish();\n            return this;\n        },\n\n        finishObjectExpression: function (properties) {\n            this.type = Syntax.ObjectExpression;\n            this.properties = properties;\n            this.finish();\n            return this;\n        },\n\n        finishObjectPattern: function (properties) {\n            this.type = Syntax.ObjectPattern;\n            this.properties = properties;\n            this.finish();\n            return this;\n        },\n\n        finishPostfixExpression: function (operator, argument) {\n            this.type = Syntax.UpdateExpression;\n            this.operator = operator;\n            this.argument = argument;\n            this.prefix = false;\n            this.finish();\n            return this;\n        },\n\n        finishProgram: function (body, sourceType) {\n            this.type = Syntax.Program;\n            this.body = body;\n            this.sourceType = sourceType;\n            this.finish();\n            return this;\n        },\n\n        finishProperty: function (kind, key, computed, value, method, shorthand) {\n            this.type = Syntax.Property;\n            this.key = key;\n            this.computed = computed;\n            this.value = value;\n            this.kind = kind;\n            this.method = method;\n            this.shorthand = shorthand;\n            this.finish();\n            return this;\n        },\n\n        finishRestElement: function (argument) {\n            this.type = Syntax.RestElement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishReturnStatement: function (argument) {\n            this.type = Syntax.ReturnStatement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishSequenceExpression: function (expressions) {\n            this.type = Syntax.SequenceExpression;\n            this.expressions = expressions;\n            this.finish();\n            return this;\n        },\n\n        finishSpreadElement: function (argument) {\n            this.type = Syntax.SpreadElement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishSwitchCase: function (test, consequent) {\n            this.type = Syntax.SwitchCase;\n            this.test = test;\n            this.consequent = consequent;\n            this.finish();\n            return this;\n        },\n\n        finishSuper: function () {\n            this.type = Syntax.Super;\n            this.finish();\n            return this;\n        },\n\n        finishSwitchStatement: function (discriminant, cases) {\n            this.type = Syntax.SwitchStatement;\n            this.discriminant = discriminant;\n            this.cases = cases;\n            this.finish();\n            return this;\n        },\n\n        finishTaggedTemplateExpression: function (tag, quasi) {\n            this.type = Syntax.TaggedTemplateExpression;\n            this.tag = tag;\n            this.quasi = quasi;\n            this.finish();\n            return this;\n        },\n\n        finishTemplateElement: function (value, tail) {\n            this.type = Syntax.TemplateElement;\n            this.value = value;\n            this.tail = tail;\n            this.finish();\n            return this;\n        },\n\n        finishTemplateLiteral: function (quasis, expressions) {\n            this.type = Syntax.TemplateLiteral;\n            this.quasis = quasis;\n            this.expressions = expressions;\n            this.finish();\n            return this;\n        },\n\n        finishThisExpression: function () {\n            this.type = Syntax.ThisExpression;\n            this.finish();\n            return this;\n        },\n\n        finishThrowStatement: function (argument) {\n            this.type = Syntax.ThrowStatement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishTryStatement: function (block, handler, finalizer) {\n            this.type = Syntax.TryStatement;\n            this.block = block;\n            this.guardedHandlers = [];\n            this.handlers = handler ? [handler] : [];\n            this.handler = handler;\n            this.finalizer = finalizer;\n            this.finish();\n            return this;\n        },\n\n        finishUnaryExpression: function (operator, argument) {\n            this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression;\n            this.operator = operator;\n            this.argument = argument;\n            this.prefix = true;\n            this.finish();\n            return this;\n        },\n\n        finishVariableDeclaration: function (declarations) {\n            this.type = Syntax.VariableDeclaration;\n            this.declarations = declarations;\n            this.kind = 'var';\n            this.finish();\n            return this;\n        },\n\n        finishLexicalDeclaration: function (declarations, kind) {\n            this.type = Syntax.VariableDeclaration;\n            this.declarations = declarations;\n            this.kind = kind;\n            this.finish();\n            return this;\n        },\n\n        finishVariableDeclarator: function (id, init) {\n            this.type = Syntax.VariableDeclarator;\n            this.id = id;\n            this.init = init;\n            this.finish();\n            return this;\n        },\n\n        finishWhileStatement: function (test, body) {\n            this.type = Syntax.WhileStatement;\n            this.test = test;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishWithStatement: function (object, body) {\n            this.type = Syntax.WithStatement;\n            this.object = object;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishExportSpecifier: function (local, exported) {\n            this.type = Syntax.ExportSpecifier;\n            this.exported = exported || local;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishImportDefaultSpecifier: function (local) {\n            this.type = Syntax.ImportDefaultSpecifier;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishImportNamespaceSpecifier: function (local) {\n            this.type = Syntax.ImportNamespaceSpecifier;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishExportNamedDeclaration: function (declaration, specifiers, src) {\n            this.type = Syntax.ExportNamedDeclaration;\n            this.declaration = declaration;\n            this.specifiers = specifiers;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishExportDefaultDeclaration: function (declaration) {\n            this.type = Syntax.ExportDefaultDeclaration;\n            this.declaration = declaration;\n            this.finish();\n            return this;\n        },\n\n        finishExportAllDeclaration: function (src) {\n            this.type = Syntax.ExportAllDeclaration;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishImportSpecifier: function (local, imported) {\n            this.type = Syntax.ImportSpecifier;\n            this.local = local || imported;\n            this.imported = imported;\n            this.finish();\n            return this;\n        },\n\n        finishImportDeclaration: function (specifiers, src) {\n            this.type = Syntax.ImportDeclaration;\n            this.specifiers = specifiers;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishYieldExpression: function (argument, delegate) {\n            this.type = Syntax.YieldExpression;\n            this.argument = argument;\n            this.delegate = delegate;\n            this.finish();\n            return this;\n        }\n    };\n\n\n    function recordError(error) {\n        var e, existing;\n\n        for (e = 0; e < extra.errors.length; e++) {\n            existing = extra.errors[e];\n            // Prevent duplicated error.\n            /* istanbul ignore next */\n            if (existing.index === error.index && existing.message === error.message) {\n                return;\n            }\n        }\n\n        extra.errors.push(error);\n    }\n\n    function constructError(msg, column) {\n        var error = new Error(msg);\n        try {\n            throw error;\n        } catch (base) {\n            /* istanbul ignore else */\n            if (Object.create && Object.defineProperty) {\n                error = Object.create(base);\n                Object.defineProperty(error, 'column', { value: column });\n            }\n        } finally {\n            return error;\n        }\n    }\n\n    function createError(line, pos, description) {\n        var msg, column, error;\n\n        msg = 'Line ' + line + ': ' + description;\n        column = pos - (scanning ? lineStart : lastLineStart) + 1;\n        error = constructError(msg, column);\n        error.lineNumber = line;\n        error.description = description;\n        error.index = pos;\n        return error;\n    }\n\n    // Throw an exception\n\n    function throwError(messageFormat) {\n        var args, msg;\n\n        args = Array.prototype.slice.call(arguments, 1);\n        msg = messageFormat.replace(/%(\\d)/g,\n            function (whole, idx) {\n                assert(idx < args.length, 'Message reference must be in range');\n                return args[idx];\n            }\n        );\n\n        throw createError(lastLineNumber, lastIndex, msg);\n    }\n\n    function tolerateError(messageFormat) {\n        var args, msg, error;\n\n        args = Array.prototype.slice.call(arguments, 1);\n        /* istanbul ignore next */\n        msg = messageFormat.replace(/%(\\d)/g,\n            function (whole, idx) {\n                assert(idx < args.length, 'Message reference must be in range');\n                return args[idx];\n            }\n        );\n\n        error = createError(lineNumber, lastIndex, msg);\n        if (extra.errors) {\n            recordError(error);\n        } else {\n            throw error;\n        }\n    }\n\n    // Throw an exception because of the token.\n\n    function unexpectedTokenError(token, message) {\n        var value, msg = message || Messages.UnexpectedToken;\n\n        if (token) {\n            if (!message) {\n                msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS :\n                    (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier :\n                    (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber :\n                    (token.type === Token.StringLiteral) ? Messages.UnexpectedString :\n                    (token.type === Token.Template) ? Messages.UnexpectedTemplate :\n                    Messages.UnexpectedToken;\n\n                if (token.type === Token.Keyword) {\n                    if (isFutureReservedWord(token.value)) {\n                        msg = Messages.UnexpectedReserved;\n                    } else if (strict && isStrictModeReservedWord(token.value)) {\n                        msg = Messages.StrictReservedWord;\n                    }\n                }\n            }\n\n            value = (token.type === Token.Template) ? token.value.raw : token.value;\n        } else {\n            value = 'ILLEGAL';\n        }\n\n        msg = msg.replace('%0', value);\n\n        return (token && typeof token.lineNumber === 'number') ?\n            createError(token.lineNumber, token.start, msg) :\n            createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg);\n    }\n\n    function throwUnexpectedToken(token, message) {\n        throw unexpectedTokenError(token, message);\n    }\n\n    function tolerateUnexpectedToken(token, message) {\n        var error = unexpectedTokenError(token, message);\n        if (extra.errors) {\n            recordError(error);\n        } else {\n            throw error;\n        }\n    }\n\n    // Expect the next token to match the specified punctuator.\n    // If not, an exception will be thrown.\n\n    function expect(value) {\n        var token = lex();\n        if (token.type !== Token.Punctuator || token.value !== value) {\n            throwUnexpectedToken(token);\n        }\n    }\n\n    /**\n     * @name expectCommaSeparator\n     * @description Quietly expect a comma when in tolerant mode, otherwise delegates\n     * to <code>expect(value)</code>\n     * @since 2.0\n     */\n    function expectCommaSeparator() {\n        var token;\n\n        if (extra.errors) {\n            token = lookahead;\n            if (token.type === Token.Punctuator && token.value === ',') {\n                lex();\n            } else if (token.type === Token.Punctuator && token.value === ';') {\n                lex();\n                tolerateUnexpectedToken(token);\n            } else {\n                tolerateUnexpectedToken(token, Messages.UnexpectedToken);\n            }\n        } else {\n            expect(',');\n        }\n    }\n\n    // Expect the next token to match the specified keyword.\n    // If not, an exception will be thrown.\n\n    function expectKeyword(keyword) {\n        var token = lex();\n        if (token.type !== Token.Keyword || token.value !== keyword) {\n            throwUnexpectedToken(token);\n        }\n    }\n\n    // Return true if the next token matches the specified punctuator.\n\n    function match(value) {\n        return lookahead.type === Token.Punctuator && lookahead.value === value;\n    }\n\n    // Return true if the next token matches the specified keyword\n\n    function matchKeyword(keyword) {\n        return lookahead.type === Token.Keyword && lookahead.value === keyword;\n    }\n\n    // Return true if the next token matches the specified contextual keyword\n    // (where an identifier is sometimes a keyword depending on the context)\n\n    function matchContextualKeyword(keyword) {\n        return lookahead.type === Token.Identifier && lookahead.value === keyword;\n    }\n\n    // Return true if the next token is an assignment operator\n\n    function matchAssign() {\n        var op;\n\n        if (lookahead.type !== Token.Punctuator) {\n            return false;\n        }\n        op = lookahead.value;\n        return op === '=' ||\n            op === '*=' ||\n            op === '/=' ||\n            op === '%=' ||\n            op === '+=' ||\n            op === '-=' ||\n            op === '<<=' ||\n            op === '>>=' ||\n            op === '>>>=' ||\n            op === '&=' ||\n            op === '^=' ||\n            op === '|=';\n    }\n\n    function consumeSemicolon() {\n        // Catch the very common case first: immediately a semicolon (U+003B).\n        if (source.charCodeAt(startIndex) === 0x3B || match(';')) {\n            lex();\n            return;\n        }\n\n        if (hasLineTerminator) {\n            return;\n        }\n\n        // FIXME(ikarienator): this is seemingly an issue in the previous location info convention.\n        lastIndex = startIndex;\n        lastLineNumber = startLineNumber;\n        lastLineStart = startLineStart;\n\n        if (lookahead.type !== Token.EOF && !match('}')) {\n            throwUnexpectedToken(lookahead);\n        }\n    }\n\n    // Cover grammar support.\n    //\n    // When an assignment expression position starts with an left parenthesis, the determination of the type\n    // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead)\n    // or the first comma. This situation also defers the determination of all the expressions nested in the pair.\n    //\n    // There are three productions that can be parsed in a parentheses pair that needs to be determined\n    // after the outermost pair is closed. They are:\n    //\n    //   1. AssignmentExpression\n    //   2. BindingElements\n    //   3. AssignmentTargets\n    //\n    // In order to avoid exponential backtracking, we use two flags to denote if the production can be\n    // binding element or assignment target.\n    //\n    // The three productions have the relationship:\n    //\n    //   BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression\n    //\n    // with a single exception that CoverInitializedName when used directly in an Expression, generates\n    // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the\n    // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair.\n    //\n    // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not\n    // effect the current flags. This means the production the parser parses is only used as an expression. Therefore\n    // the CoverInitializedName check is conducted.\n    //\n    // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates\n    // the flags outside of the parser. This means the production the parser parses is used as a part of a potential\n    // pattern. The CoverInitializedName check is deferred.\n    function isolateCoverGrammar(parser) {\n        var oldIsBindingElement = isBindingElement,\n            oldIsAssignmentTarget = isAssignmentTarget,\n            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,\n            result;\n        isBindingElement = true;\n        isAssignmentTarget = true;\n        firstCoverInitializedNameError = null;\n        result = parser();\n        if (firstCoverInitializedNameError !== null) {\n            throwUnexpectedToken(firstCoverInitializedNameError);\n        }\n        isBindingElement = oldIsBindingElement;\n        isAssignmentTarget = oldIsAssignmentTarget;\n        firstCoverInitializedNameError = oldFirstCoverInitializedNameError;\n        return result;\n    }\n\n    function inheritCoverGrammar(parser) {\n        var oldIsBindingElement = isBindingElement,\n            oldIsAssignmentTarget = isAssignmentTarget,\n            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,\n            result;\n        isBindingElement = true;\n        isAssignmentTarget = true;\n        firstCoverInitializedNameError = null;\n        result = parser();\n        isBindingElement = isBindingElement && oldIsBindingElement;\n        isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget;\n        firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError;\n        return result;\n    }\n\n    // ECMA-262 13.3.3 Destructuring Binding Patterns\n\n    function parseArrayPattern(params, kind) {\n        var node = new Node(), elements = [], rest, restNode;\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else {\n                if (match('...')) {\n                    restNode = new Node();\n                    lex();\n                    params.push(lookahead);\n                    rest = parseVariableIdentifier(kind);\n                    elements.push(restNode.finishRestElement(rest));\n                    break;\n                } else {\n                    elements.push(parsePatternWithDefault(params, kind));\n                }\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n\n        }\n\n        expect(']');\n\n        return node.finishArrayPattern(elements);\n    }\n\n    function parsePropertyPattern(params, kind) {\n        var node = new Node(), key, keyToken, computed = match('['), init;\n        if (lookahead.type === Token.Identifier) {\n            keyToken = lookahead;\n            key = parseVariableIdentifier();\n            if (match('=')) {\n                params.push(keyToken);\n                lex();\n                init = parseAssignmentExpression();\n\n                return node.finishProperty(\n                    'init', key, false,\n                    new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, false);\n            } else if (!match(':')) {\n                params.push(keyToken);\n                return node.finishProperty('init', key, false, key, false, true);\n            }\n        } else {\n            key = parseObjectPropertyKey();\n        }\n        expect(':');\n        init = parsePatternWithDefault(params, kind);\n        return node.finishProperty('init', key, computed, init, false, false);\n    }\n\n    function parseObjectPattern(params, kind) {\n        var node = new Node(), properties = [];\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parsePropertyPattern(params, kind));\n            if (!match('}')) {\n                expect(',');\n            }\n        }\n\n        lex();\n\n        return node.finishObjectPattern(properties);\n    }\n\n    function parsePattern(params, kind) {\n        if (match('[')) {\n            return parseArrayPattern(params, kind);\n        } else if (match('{')) {\n            return parseObjectPattern(params, kind);\n        } else if (matchKeyword('let')) {\n            if (kind === 'const' || kind === 'let') {\n                tolerateUnexpectedToken(lookahead, Messages.UnexpectedToken);\n            }\n        }\n\n        params.push(lookahead);\n        return parseVariableIdentifier(kind);\n    }\n\n    function parsePatternWithDefault(params, kind) {\n        var startToken = lookahead, pattern, previousAllowYield, right;\n        pattern = parsePattern(params, kind);\n        if (match('=')) {\n            lex();\n            previousAllowYield = state.allowYield;\n            state.allowYield = true;\n            right = isolateCoverGrammar(parseAssignmentExpression);\n            state.allowYield = previousAllowYield;\n            pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right);\n        }\n        return pattern;\n    }\n\n    // ECMA-262 12.2.5 Array Initializer\n\n    function parseArrayInitializer() {\n        var elements = [], node = new Node(), restSpread;\n\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else if (match('...')) {\n                restSpread = new Node();\n                lex();\n                restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression));\n\n                if (!match(']')) {\n                    isAssignmentTarget = isBindingElement = false;\n                    expect(',');\n                }\n                elements.push(restSpread);\n            } else {\n                elements.push(inheritCoverGrammar(parseAssignmentExpression));\n\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n        }\n\n        lex();\n\n        return node.finishArrayExpression(elements);\n    }\n\n    // ECMA-262 12.2.6 Object Initializer\n\n    function parsePropertyFunction(node, paramInfo, isGenerator) {\n        var previousStrict, body;\n\n        isAssignmentTarget = isBindingElement = false;\n\n        previousStrict = strict;\n        body = isolateCoverGrammar(parseFunctionSourceElements);\n\n        if (strict && paramInfo.firstRestricted) {\n            tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message);\n        }\n        if (strict && paramInfo.stricted) {\n            tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message);\n        }\n\n        strict = previousStrict;\n        return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator);\n    }\n\n    function parsePropertyMethodFunction() {\n        var params, method, node = new Node(),\n            previousAllowYield = state.allowYield;\n\n        state.allowYield = false;\n        params = parseParams();\n        state.allowYield = previousAllowYield;\n\n        state.allowYield = false;\n        method = parsePropertyFunction(node, params, false);\n        state.allowYield = previousAllowYield;\n\n        return method;\n    }\n\n    function parseObjectPropertyKey() {\n        var token, node = new Node(), expr;\n\n        token = lex();\n\n        // Note: This function is called only from parseObjectProperty(), where\n        // EOF and Punctuator tokens are already filtered out.\n\n        switch (token.type) {\n        case Token.StringLiteral:\n        case Token.NumericLiteral:\n            if (strict && token.octal) {\n                tolerateUnexpectedToken(token, Messages.StrictOctalLiteral);\n            }\n            return node.finishLiteral(token);\n        case Token.Identifier:\n        case Token.BooleanLiteral:\n        case Token.NullLiteral:\n        case Token.Keyword:\n            return node.finishIdentifier(token.value);\n        case Token.Punctuator:\n            if (token.value === '[') {\n                expr = isolateCoverGrammar(parseAssignmentExpression);\n                expect(']');\n                return expr;\n            }\n            break;\n        }\n        throwUnexpectedToken(token);\n    }\n\n    function lookaheadPropertyName() {\n        switch (lookahead.type) {\n        case Token.Identifier:\n        case Token.StringLiteral:\n        case Token.BooleanLiteral:\n        case Token.NullLiteral:\n        case Token.NumericLiteral:\n        case Token.Keyword:\n            return true;\n        case Token.Punctuator:\n            return lookahead.value === '[';\n        }\n        return false;\n    }\n\n    // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals,\n    // it might be called at a position where there is in fact a short hand identifier pattern or a data property.\n    // This can only be determined after we consumed up to the left parentheses.\n    //\n    // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller\n    // is responsible to visit other options.\n    function tryParseMethodDefinition(token, key, computed, node) {\n        var value, options, methodNode, params,\n            previousAllowYield = state.allowYield;\n\n        if (token.type === Token.Identifier) {\n            // check for `get` and `set`;\n\n            if (token.value === 'get' && lookaheadPropertyName()) {\n                computed = match('[');\n                key = parseObjectPropertyKey();\n                methodNode = new Node();\n                expect('(');\n                expect(')');\n\n                state.allowYield = false;\n                value = parsePropertyFunction(methodNode, {\n                    params: [],\n                    defaults: [],\n                    stricted: null,\n                    firstRestricted: null,\n                    message: null\n                }, false);\n                state.allowYield = previousAllowYield;\n\n                return node.finishProperty('get', key, computed, value, false, false);\n            } else if (token.value === 'set' && lookaheadPropertyName()) {\n                computed = match('[');\n                key = parseObjectPropertyKey();\n                methodNode = new Node();\n                expect('(');\n\n                options = {\n                    params: [],\n                    defaultCount: 0,\n                    defaults: [],\n                    firstRestricted: null,\n                    paramSet: {}\n                };\n                if (match(')')) {\n                    tolerateUnexpectedToken(lookahead);\n                } else {\n                    state.allowYield = false;\n                    parseParam(options);\n                    state.allowYield = previousAllowYield;\n                    if (options.defaultCount === 0) {\n                        options.defaults = [];\n                    }\n                }\n                expect(')');\n\n                state.allowYield = false;\n                value = parsePropertyFunction(methodNode, options, false);\n                state.allowYield = previousAllowYield;\n\n                return node.finishProperty('set', key, computed, value, false, false);\n            }\n        } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) {\n            computed = match('[');\n            key = parseObjectPropertyKey();\n            methodNode = new Node();\n\n            state.allowYield = true;\n            params = parseParams();\n            state.allowYield = previousAllowYield;\n\n            state.allowYield = false;\n            value = parsePropertyFunction(methodNode, params, true);\n            state.allowYield = previousAllowYield;\n\n            return node.finishProperty('init', key, computed, value, true, false);\n        }\n\n        if (key && match('(')) {\n            value = parsePropertyMethodFunction();\n            return node.finishProperty('init', key, computed, value, true, false);\n        }\n\n        // Not a MethodDefinition.\n        return null;\n    }\n\n    function parseObjectProperty(hasProto) {\n        var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value;\n\n        computed = match('[');\n        if (match('*')) {\n            lex();\n        } else {\n            key = parseObjectPropertyKey();\n        }\n        maybeMethod = tryParseMethodDefinition(token, key, computed, node);\n        if (maybeMethod) {\n            return maybeMethod;\n        }\n\n        if (!key) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        // Check for duplicated __proto__\n        if (!computed) {\n            proto = (key.type === Syntax.Identifier && key.name === '__proto__') ||\n                (key.type === Syntax.Literal && key.value === '__proto__');\n            if (hasProto.value && proto) {\n                tolerateError(Messages.DuplicateProtoProperty);\n            }\n            hasProto.value |= proto;\n        }\n\n        if (match(':')) {\n            lex();\n            value = inheritCoverGrammar(parseAssignmentExpression);\n            return node.finishProperty('init', key, computed, value, false, false);\n        }\n\n        if (token.type === Token.Identifier) {\n            if (match('=')) {\n                firstCoverInitializedNameError = lookahead;\n                lex();\n                value = isolateCoverGrammar(parseAssignmentExpression);\n                return node.finishProperty('init', key, computed,\n                    new WrappingNode(token).finishAssignmentPattern(key, value), false, true);\n            }\n            return node.finishProperty('init', key, computed, key, false, true);\n        }\n\n        throwUnexpectedToken(lookahead);\n    }\n\n    function parseObjectInitializer() {\n        var properties = [], hasProto = {value: false}, node = new Node();\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parseObjectProperty(hasProto));\n\n            if (!match('}')) {\n                expectCommaSeparator();\n            }\n        }\n\n        expect('}');\n\n        return node.finishObjectExpression(properties);\n    }\n\n    function reinterpretExpressionAsPattern(expr) {\n        var i;\n        switch (expr.type) {\n        case Syntax.Identifier:\n        case Syntax.MemberExpression:\n        case Syntax.RestElement:\n        case Syntax.AssignmentPattern:\n            break;\n        case Syntax.SpreadElement:\n            expr.type = Syntax.RestElement;\n            reinterpretExpressionAsPattern(expr.argument);\n            break;\n        case Syntax.ArrayExpression:\n            expr.type = Syntax.ArrayPattern;\n            for (i = 0; i < expr.elements.length; i++) {\n                if (expr.elements[i] !== null) {\n                    reinterpretExpressionAsPattern(expr.elements[i]);\n                }\n            }\n            break;\n        case Syntax.ObjectExpression:\n            expr.type = Syntax.ObjectPattern;\n            for (i = 0; i < expr.properties.length; i++) {\n                reinterpretExpressionAsPattern(expr.properties[i].value);\n            }\n            break;\n        case Syntax.AssignmentExpression:\n            expr.type = Syntax.AssignmentPattern;\n            reinterpretExpressionAsPattern(expr.left);\n            break;\n        default:\n            // Allow other node type for tolerant parsing.\n            break;\n        }\n    }\n\n    // ECMA-262 12.2.9 Template Literals\n\n    function parseTemplateElement(option) {\n        var node, token;\n\n        if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) {\n            throwUnexpectedToken();\n        }\n\n        node = new Node();\n        token = lex();\n\n        return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail);\n    }\n\n    function parseTemplateLiteral() {\n        var quasi, quasis, expressions, node = new Node();\n\n        quasi = parseTemplateElement({ head: true });\n        quasis = [quasi];\n        expressions = [];\n\n        while (!quasi.tail) {\n            expressions.push(parseExpression());\n            quasi = parseTemplateElement({ head: false });\n            quasis.push(quasi);\n        }\n\n        return node.finishTemplateLiteral(quasis, expressions);\n    }\n\n    // ECMA-262 12.2.10 The Grouping Operator\n\n    function parseGroupExpression() {\n        var expr, expressions, startToken, i, params = [];\n\n        expect('(');\n\n        if (match(')')) {\n            lex();\n            if (!match('=>')) {\n                expect('=>');\n            }\n            return {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: [],\n                rawParams: []\n            };\n        }\n\n        startToken = lookahead;\n        if (match('...')) {\n            expr = parseRestElement(params);\n            expect(')');\n            if (!match('=>')) {\n                expect('=>');\n            }\n            return {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: [expr]\n            };\n        }\n\n        isBindingElement = true;\n        expr = inheritCoverGrammar(parseAssignmentExpression);\n\n        if (match(',')) {\n            isAssignmentTarget = false;\n            expressions = [expr];\n\n            while (startIndex < length) {\n                if (!match(',')) {\n                    break;\n                }\n                lex();\n\n                if (match('...')) {\n                    if (!isBindingElement) {\n                        throwUnexpectedToken(lookahead);\n                    }\n                    expressions.push(parseRestElement(params));\n                    expect(')');\n                    if (!match('=>')) {\n                        expect('=>');\n                    }\n                    isBindingElement = false;\n                    for (i = 0; i < expressions.length; i++) {\n                        reinterpretExpressionAsPattern(expressions[i]);\n                    }\n                    return {\n                        type: PlaceHolders.ArrowParameterPlaceHolder,\n                        params: expressions\n                    };\n                }\n\n                expressions.push(inheritCoverGrammar(parseAssignmentExpression));\n            }\n\n            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);\n        }\n\n\n        expect(')');\n\n        if (match('=>')) {\n            if (expr.type === Syntax.Identifier && expr.name === 'yield') {\n                return {\n                    type: PlaceHolders.ArrowParameterPlaceHolder,\n                    params: [expr]\n                };\n            }\n\n            if (!isBindingElement) {\n                throwUnexpectedToken(lookahead);\n            }\n\n            if (expr.type === Syntax.SequenceExpression) {\n                for (i = 0; i < expr.expressions.length; i++) {\n                    reinterpretExpressionAsPattern(expr.expressions[i]);\n                }\n            } else {\n                reinterpretExpressionAsPattern(expr);\n            }\n\n            expr = {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr]\n            };\n        }\n        isBindingElement = false;\n        return expr;\n    }\n\n\n    // ECMA-262 12.2 Primary Expressions\n\n    function parsePrimaryExpression() {\n        var type, token, expr, node;\n\n        if (match('(')) {\n            isBindingElement = false;\n            return inheritCoverGrammar(parseGroupExpression);\n        }\n\n        if (match('[')) {\n            return inheritCoverGrammar(parseArrayInitializer);\n        }\n\n        if (match('{')) {\n            return inheritCoverGrammar(parseObjectInitializer);\n        }\n\n        type = lookahead.type;\n        node = new Node();\n\n        if (type === Token.Identifier) {\n            if (state.sourceType === 'module' && lookahead.value === 'await') {\n                tolerateUnexpectedToken(lookahead);\n            }\n            expr = node.finishIdentifier(lex().value);\n        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            if (strict && lookahead.octal) {\n                tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral);\n            }\n            expr = node.finishLiteral(lex());\n        } else if (type === Token.Keyword) {\n            if (!strict && state.allowYield && matchKeyword('yield')) {\n                return parseNonComputedProperty();\n            }\n            if (!strict && matchKeyword('let')) {\n                return node.finishIdentifier(lex().value);\n            }\n            isAssignmentTarget = isBindingElement = false;\n            if (matchKeyword('function')) {\n                return parseFunctionExpression();\n            }\n            if (matchKeyword('this')) {\n                lex();\n                return node.finishThisExpression();\n            }\n            if (matchKeyword('class')) {\n                return parseClassExpression();\n            }\n            throwUnexpectedToken(lex());\n        } else if (type === Token.BooleanLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            token = lex();\n            token.value = (token.value === 'true');\n            expr = node.finishLiteral(token);\n        } else if (type === Token.NullLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            token = lex();\n            token.value = null;\n            expr = node.finishLiteral(token);\n        } else if (match('/') || match('/=')) {\n            isAssignmentTarget = isBindingElement = false;\n            index = startIndex;\n\n            if (typeof extra.tokens !== 'undefined') {\n                token = collectRegex();\n            } else {\n                token = scanRegExp();\n            }\n            lex();\n            expr = node.finishLiteral(token);\n        } else if (type === Token.Template) {\n            expr = parseTemplateLiteral();\n        } else {\n            throwUnexpectedToken(lex());\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.3 Left-Hand-Side Expressions\n\n    function parseArguments() {\n        var args = [], expr;\n\n        expect('(');\n\n        if (!match(')')) {\n            while (startIndex < length) {\n                if (match('...')) {\n                    expr = new Node();\n                    lex();\n                    expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression));\n                } else {\n                    expr = isolateCoverGrammar(parseAssignmentExpression);\n                }\n                args.push(expr);\n                if (match(')')) {\n                    break;\n                }\n                expectCommaSeparator();\n            }\n        }\n\n        expect(')');\n\n        return args;\n    }\n\n    function parseNonComputedProperty() {\n        var token, node = new Node();\n\n        token = lex();\n\n        if (!isIdentifierName(token)) {\n            throwUnexpectedToken(token);\n        }\n\n        return node.finishIdentifier(token.value);\n    }\n\n    function parseNonComputedMember() {\n        expect('.');\n\n        return parseNonComputedProperty();\n    }\n\n    function parseComputedMember() {\n        var expr;\n\n        expect('[');\n\n        expr = isolateCoverGrammar(parseExpression);\n\n        expect(']');\n\n        return expr;\n    }\n\n    // ECMA-262 12.3.3 The new Operator\n\n    function parseNewExpression() {\n        var callee, args, node = new Node();\n\n        expectKeyword('new');\n\n        if (match('.')) {\n            lex();\n            if (lookahead.type === Token.Identifier && lookahead.value === 'target') {\n                if (state.inFunctionBody) {\n                    lex();\n                    return node.finishMetaProperty('new', 'target');\n                }\n            }\n            throwUnexpectedToken(lookahead);\n        }\n\n        callee = isolateCoverGrammar(parseLeftHandSideExpression);\n        args = match('(') ? parseArguments() : [];\n\n        isAssignmentTarget = isBindingElement = false;\n\n        return node.finishNewExpression(callee, args);\n    }\n\n    // ECMA-262 12.3.4 Function Calls\n\n    function parseLeftHandSideExpressionAllowCall() {\n        var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn;\n\n        startToken = lookahead;\n        state.allowIn = true;\n\n        if (matchKeyword('super') && state.inFunctionBody) {\n            expr = new Node();\n            lex();\n            expr = expr.finishSuper();\n            if (!match('(') && !match('.') && !match('[')) {\n                throwUnexpectedToken(lookahead);\n            }\n        } else {\n            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);\n        }\n\n        for (;;) {\n            if (match('.')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseNonComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);\n            } else if (match('(')) {\n                isBindingElement = false;\n                isAssignmentTarget = false;\n                args = parseArguments();\n                expr = new WrappingNode(startToken).finishCallExpression(expr, args);\n            } else if (match('[')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);\n            } else if (lookahead.type === Token.Template && lookahead.head) {\n                quasi = parseTemplateLiteral();\n                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);\n            } else {\n                break;\n            }\n        }\n        state.allowIn = previousAllowIn;\n\n        return expr;\n    }\n\n    // ECMA-262 12.3 Left-Hand-Side Expressions\n\n    function parseLeftHandSideExpression() {\n        var quasi, expr, property, startToken;\n        assert(state.allowIn, 'callee of new expression always allow in keyword.');\n\n        startToken = lookahead;\n\n        if (matchKeyword('super') && state.inFunctionBody) {\n            expr = new Node();\n            lex();\n            expr = expr.finishSuper();\n            if (!match('[') && !match('.')) {\n                throwUnexpectedToken(lookahead);\n            }\n        } else {\n            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);\n        }\n\n        for (;;) {\n            if (match('[')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);\n            } else if (match('.')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseNonComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);\n            } else if (lookahead.type === Token.Template && lookahead.head) {\n                quasi = parseTemplateLiteral();\n                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);\n            } else {\n                break;\n            }\n        }\n        return expr;\n    }\n\n    // ECMA-262 12.4 Postfix Expressions\n\n    function parsePostfixExpression() {\n        var expr, token, startToken = lookahead;\n\n        expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall);\n\n        if (!hasLineTerminator && lookahead.type === Token.Punctuator) {\n            if (match('++') || match('--')) {\n                // ECMA-262 11.3.1, 11.3.2\n                if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {\n                    tolerateError(Messages.StrictLHSPostfix);\n                }\n\n                if (!isAssignmentTarget) {\n                    tolerateError(Messages.InvalidLHSInAssignment);\n                }\n\n                isAssignmentTarget = isBindingElement = false;\n\n                token = lex();\n                expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr);\n            }\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.5 Unary Operators\n\n    function parseUnaryExpression() {\n        var token, expr, startToken;\n\n        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {\n            expr = parsePostfixExpression();\n        } else if (match('++') || match('--')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            // ECMA-262 11.4.4, 11.4.5\n            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {\n                tolerateError(Messages.StrictLHSPrefix);\n            }\n\n            if (!isAssignmentTarget) {\n                tolerateError(Messages.InvalidLHSInAssignment);\n            }\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            isAssignmentTarget = isBindingElement = false;\n        } else if (match('+') || match('-') || match('~') || match('!')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            isAssignmentTarget = isBindingElement = false;\n        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) {\n                tolerateError(Messages.StrictDelete);\n            }\n            isAssignmentTarget = isBindingElement = false;\n        } else {\n            expr = parsePostfixExpression();\n        }\n\n        return expr;\n    }\n\n    function binaryPrecedence(token, allowIn) {\n        var prec = 0;\n\n        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {\n            return 0;\n        }\n\n        switch (token.value) {\n        case '||':\n            prec = 1;\n            break;\n\n        case '&&':\n            prec = 2;\n            break;\n\n        case '|':\n            prec = 3;\n            break;\n\n        case '^':\n            prec = 4;\n            break;\n\n        case '&':\n            prec = 5;\n            break;\n\n        case '==':\n        case '!=':\n        case '===':\n        case '!==':\n            prec = 6;\n            break;\n\n        case '<':\n        case '>':\n        case '<=':\n        case '>=':\n        case 'instanceof':\n            prec = 7;\n            break;\n\n        case 'in':\n            prec = allowIn ? 7 : 0;\n            break;\n\n        case '<<':\n        case '>>':\n        case '>>>':\n            prec = 8;\n            break;\n\n        case '+':\n        case '-':\n            prec = 9;\n            break;\n\n        case '*':\n        case '/':\n        case '%':\n            prec = 11;\n            break;\n\n        default:\n            break;\n        }\n\n        return prec;\n    }\n\n    // ECMA-262 12.6 Multiplicative Operators\n    // ECMA-262 12.7 Additive Operators\n    // ECMA-262 12.8 Bitwise Shift Operators\n    // ECMA-262 12.9 Relational Operators\n    // ECMA-262 12.10 Equality Operators\n    // ECMA-262 12.11 Binary Bitwise Operators\n    // ECMA-262 12.12 Binary Logical Operators\n\n    function parseBinaryExpression() {\n        var marker, markers, expr, token, prec, stack, right, operator, left, i;\n\n        marker = lookahead;\n        left = inheritCoverGrammar(parseUnaryExpression);\n\n        token = lookahead;\n        prec = binaryPrecedence(token, state.allowIn);\n        if (prec === 0) {\n            return left;\n        }\n        isAssignmentTarget = isBindingElement = false;\n        token.prec = prec;\n        lex();\n\n        markers = [marker, lookahead];\n        right = isolateCoverGrammar(parseUnaryExpression);\n\n        stack = [left, token, right];\n\n        while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) {\n\n            // Reduce: make a binary expression from the three topmost entries.\n            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {\n                right = stack.pop();\n                operator = stack.pop().value;\n                left = stack.pop();\n                markers.pop();\n                expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right);\n                stack.push(expr);\n            }\n\n            // Shift.\n            token = lex();\n            token.prec = prec;\n            stack.push(token);\n            markers.push(lookahead);\n            expr = isolateCoverGrammar(parseUnaryExpression);\n            stack.push(expr);\n        }\n\n        // Final reduce to clean-up the stack.\n        i = stack.length - 1;\n        expr = stack[i];\n        markers.pop();\n        while (i > 1) {\n            expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr);\n            i -= 2;\n        }\n\n        return expr;\n    }\n\n\n    // ECMA-262 12.13 Conditional Operator\n\n    function parseConditionalExpression() {\n        var expr, previousAllowIn, consequent, alternate, startToken;\n\n        startToken = lookahead;\n\n        expr = inheritCoverGrammar(parseBinaryExpression);\n        if (match('?')) {\n            lex();\n            previousAllowIn = state.allowIn;\n            state.allowIn = true;\n            consequent = isolateCoverGrammar(parseAssignmentExpression);\n            state.allowIn = previousAllowIn;\n            expect(':');\n            alternate = isolateCoverGrammar(parseAssignmentExpression);\n\n            expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate);\n            isAssignmentTarget = isBindingElement = false;\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 14.2 Arrow Function Definitions\n\n    function parseConciseBody() {\n        if (match('{')) {\n            return parseFunctionSourceElements();\n        }\n        return isolateCoverGrammar(parseAssignmentExpression);\n    }\n\n    function checkPatternParam(options, param) {\n        var i;\n        switch (param.type) {\n        case Syntax.Identifier:\n            validateParam(options, param, param.name);\n            break;\n        case Syntax.RestElement:\n            checkPatternParam(options, param.argument);\n            break;\n        case Syntax.AssignmentPattern:\n            checkPatternParam(options, param.left);\n            break;\n        case Syntax.ArrayPattern:\n            for (i = 0; i < param.elements.length; i++) {\n                if (param.elements[i] !== null) {\n                    checkPatternParam(options, param.elements[i]);\n                }\n            }\n            break;\n        case Syntax.YieldExpression:\n            break;\n        default:\n            assert(param.type === Syntax.ObjectPattern, 'Invalid type');\n            for (i = 0; i < param.properties.length; i++) {\n                checkPatternParam(options, param.properties[i].value);\n            }\n            break;\n        }\n    }\n    function reinterpretAsCoverFormalsList(expr) {\n        var i, len, param, params, defaults, defaultCount, options, token;\n\n        defaults = [];\n        defaultCount = 0;\n        params = [expr];\n\n        switch (expr.type) {\n        case Syntax.Identifier:\n            break;\n        case PlaceHolders.ArrowParameterPlaceHolder:\n            params = expr.params;\n            break;\n        default:\n            return null;\n        }\n\n        options = {\n            paramSet: {}\n        };\n\n        for (i = 0, len = params.length; i < len; i += 1) {\n            param = params[i];\n            switch (param.type) {\n            case Syntax.AssignmentPattern:\n                params[i] = param.left;\n                if (param.right.type === Syntax.YieldExpression) {\n                    if (param.right.argument) {\n                        throwUnexpectedToken(lookahead);\n                    }\n                    param.right.type = Syntax.Identifier;\n                    param.right.name = 'yield';\n                    delete param.right.argument;\n                    delete param.right.delegate;\n                }\n                defaults.push(param.right);\n                ++defaultCount;\n                checkPatternParam(options, param.left);\n                break;\n            default:\n                checkPatternParam(options, param);\n                params[i] = param;\n                defaults.push(null);\n                break;\n            }\n        }\n\n        if (strict || !state.allowYield) {\n            for (i = 0, len = params.length; i < len; i += 1) {\n                param = params[i];\n                if (param.type === Syntax.YieldExpression) {\n                    throwUnexpectedToken(lookahead);\n                }\n            }\n        }\n\n        if (options.message === Messages.StrictParamDupe) {\n            token = strict ? options.stricted : options.firstRestricted;\n            throwUnexpectedToken(token, options.message);\n        }\n\n        if (defaultCount === 0) {\n            defaults = [];\n        }\n\n        return {\n            params: params,\n            defaults: defaults,\n            stricted: options.stricted,\n            firstRestricted: options.firstRestricted,\n            message: options.message\n        };\n    }\n\n    function parseArrowFunctionExpression(options, node) {\n        var previousStrict, previousAllowYield, body;\n\n        if (hasLineTerminator) {\n            tolerateUnexpectedToken(lookahead);\n        }\n        expect('=>');\n\n        previousStrict = strict;\n        previousAllowYield = state.allowYield;\n        state.allowYield = true;\n\n        body = parseConciseBody();\n\n        if (strict && options.firstRestricted) {\n            throwUnexpectedToken(options.firstRestricted, options.message);\n        }\n        if (strict && options.stricted) {\n            tolerateUnexpectedToken(options.stricted, options.message);\n        }\n\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement);\n    }\n\n    // ECMA-262 14.4 Yield expression\n\n    function parseYieldExpression() {\n        var argument, expr, delegate, previousAllowYield;\n\n        argument = null;\n        expr = new Node();\n        delegate = false;\n\n        expectKeyword('yield');\n\n        if (!hasLineTerminator) {\n            previousAllowYield = state.allowYield;\n            state.allowYield = false;\n            delegate = match('*');\n            if (delegate) {\n                lex();\n                argument = parseAssignmentExpression();\n            } else {\n                if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) {\n                    argument = parseAssignmentExpression();\n                }\n            }\n            state.allowYield = previousAllowYield;\n        }\n\n        return expr.finishYieldExpression(argument, delegate);\n    }\n\n    // ECMA-262 12.14 Assignment Operators\n\n    function parseAssignmentExpression() {\n        var token, expr, right, list, startToken;\n\n        startToken = lookahead;\n        token = lookahead;\n\n        if (!state.allowYield && matchKeyword('yield')) {\n            return parseYieldExpression();\n        }\n\n        expr = parseConditionalExpression();\n\n        if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) {\n            isAssignmentTarget = isBindingElement = false;\n            list = reinterpretAsCoverFormalsList(expr);\n\n            if (list) {\n                firstCoverInitializedNameError = null;\n                return parseArrowFunctionExpression(list, new WrappingNode(startToken));\n            }\n\n            return expr;\n        }\n\n        if (matchAssign()) {\n            if (!isAssignmentTarget) {\n                tolerateError(Messages.InvalidLHSInAssignment);\n            }\n\n            // ECMA-262 12.1.1\n            if (strict && expr.type === Syntax.Identifier) {\n                if (isRestrictedWord(expr.name)) {\n                    tolerateUnexpectedToken(token, Messages.StrictLHSAssignment);\n                }\n                if (isStrictModeReservedWord(expr.name)) {\n                    tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n                }\n            }\n\n            if (!match('=')) {\n                isAssignmentTarget = isBindingElement = false;\n            } else {\n                reinterpretExpressionAsPattern(expr);\n            }\n\n            token = lex();\n            right = isolateCoverGrammar(parseAssignmentExpression);\n            expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right);\n            firstCoverInitializedNameError = null;\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.15 Comma Operator\n\n    function parseExpression() {\n        var expr, startToken = lookahead, expressions;\n\n        expr = isolateCoverGrammar(parseAssignmentExpression);\n\n        if (match(',')) {\n            expressions = [expr];\n\n            while (startIndex < length) {\n                if (!match(',')) {\n                    break;\n                }\n                lex();\n                expressions.push(isolateCoverGrammar(parseAssignmentExpression));\n            }\n\n            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 13.2 Block\n\n    function parseStatementListItem() {\n        if (lookahead.type === Token.Keyword) {\n            switch (lookahead.value) {\n            case 'export':\n                if (state.sourceType !== 'module') {\n                    tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration);\n                }\n                return parseExportDeclaration();\n            case 'import':\n                if (state.sourceType !== 'module') {\n                    tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration);\n                }\n                return parseImportDeclaration();\n            case 'const':\n                return parseLexicalDeclaration({inFor: false});\n            case 'function':\n                return parseFunctionDeclaration(new Node());\n            case 'class':\n                return parseClassDeclaration();\n            }\n        }\n\n        if (matchKeyword('let') && isLexicalDeclaration()) {\n            return parseLexicalDeclaration({inFor: false});\n        }\n\n        return parseStatement();\n    }\n\n    function parseStatementList() {\n        var list = [];\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            list.push(parseStatementListItem());\n        }\n\n        return list;\n    }\n\n    function parseBlock() {\n        var block, node = new Node();\n\n        expect('{');\n\n        block = parseStatementList();\n\n        expect('}');\n\n        return node.finishBlockStatement(block);\n    }\n\n    // ECMA-262 13.3.2 Variable Statement\n\n    function parseVariableIdentifier(kind) {\n        var token, node = new Node();\n\n        token = lex();\n\n        if (token.type === Token.Keyword && token.value === 'yield') {\n            if (strict) {\n                tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n            } if (!state.allowYield) {\n                throwUnexpectedToken(token);\n            }\n        } else if (token.type !== Token.Identifier) {\n            if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) {\n                tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n            } else {\n                if (strict || token.value !== 'let' || kind !== 'var') {\n                    throwUnexpectedToken(token);\n                }\n            }\n        } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') {\n            tolerateUnexpectedToken(token);\n        }\n\n        return node.finishIdentifier(token.value);\n    }\n\n    function parseVariableDeclaration(options) {\n        var init = null, id, node = new Node(), params = [];\n\n        id = parsePattern(params, 'var');\n\n        // ECMA-262 12.2.1\n        if (strict && isRestrictedWord(id.name)) {\n            tolerateError(Messages.StrictVarName);\n        }\n\n        if (match('=')) {\n            lex();\n            init = isolateCoverGrammar(parseAssignmentExpression);\n        } else if (id.type !== Syntax.Identifier && !options.inFor) {\n            expect('=');\n        }\n\n        return node.finishVariableDeclarator(id, init);\n    }\n\n    function parseVariableDeclarationList(options) {\n        var opt, list;\n\n        opt = { inFor: options.inFor };\n        list = [parseVariableDeclaration(opt)];\n\n        while (match(',')) {\n            lex();\n            list.push(parseVariableDeclaration(opt));\n        }\n\n        return list;\n    }\n\n    function parseVariableStatement(node) {\n        var declarations;\n\n        expectKeyword('var');\n\n        declarations = parseVariableDeclarationList({ inFor: false });\n\n        consumeSemicolon();\n\n        return node.finishVariableDeclaration(declarations);\n    }\n\n    // ECMA-262 13.3.1 Let and Const Declarations\n\n    function parseLexicalBinding(kind, options) {\n        var init = null, id, node = new Node(), params = [];\n\n        id = parsePattern(params, kind);\n\n        // ECMA-262 12.2.1\n        if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) {\n            tolerateError(Messages.StrictVarName);\n        }\n\n        if (kind === 'const') {\n            if (!matchKeyword('in') && !matchContextualKeyword('of')) {\n                expect('=');\n                init = isolateCoverGrammar(parseAssignmentExpression);\n            }\n        } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) {\n            expect('=');\n            init = isolateCoverGrammar(parseAssignmentExpression);\n        }\n\n        return node.finishVariableDeclarator(id, init);\n    }\n\n    function parseBindingList(kind, options) {\n        var list = [parseLexicalBinding(kind, options)];\n\n        while (match(',')) {\n            lex();\n            list.push(parseLexicalBinding(kind, options));\n        }\n\n        return list;\n    }\n\n\n    function tokenizerState() {\n        return {\n            index: index,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            hasLineTerminator: hasLineTerminator,\n            lastIndex: lastIndex,\n            lastLineNumber: lastLineNumber,\n            lastLineStart: lastLineStart,\n            startIndex: startIndex,\n            startLineNumber: startLineNumber,\n            startLineStart: startLineStart,\n            lookahead: lookahead,\n            tokenCount: extra.tokens ? extra.tokens.length : 0\n        };\n    }\n\n    function resetTokenizerState(ts) {\n        index = ts.index;\n        lineNumber = ts.lineNumber;\n        lineStart = ts.lineStart;\n        hasLineTerminator = ts.hasLineTerminator;\n        lastIndex = ts.lastIndex;\n        lastLineNumber = ts.lastLineNumber;\n        lastLineStart = ts.lastLineStart;\n        startIndex = ts.startIndex;\n        startLineNumber = ts.startLineNumber;\n        startLineStart = ts.startLineStart;\n        lookahead = ts.lookahead;\n        if (extra.tokens) {\n            extra.tokens.splice(ts.tokenCount, extra.tokens.length);\n        }\n    }\n\n    function isLexicalDeclaration() {\n        var lexical, ts;\n\n        ts = tokenizerState();\n\n        lex();\n        lexical = (lookahead.type === Token.Identifier) || match('[') || match('{') ||\n            matchKeyword('let') || matchKeyword('yield');\n\n        resetTokenizerState(ts);\n\n        return lexical;\n    }\n\n    function parseLexicalDeclaration(options) {\n        var kind, declarations, node = new Node();\n\n        kind = lex().value;\n        assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const');\n\n        declarations = parseBindingList(kind, options);\n\n        consumeSemicolon();\n\n        return node.finishLexicalDeclaration(declarations, kind);\n    }\n\n    function parseRestElement(params) {\n        var param, node = new Node();\n\n        lex();\n\n        if (match('{')) {\n            throwError(Messages.ObjectPatternAsRestParameter);\n        }\n\n        params.push(lookahead);\n\n        param = parseVariableIdentifier();\n\n        if (match('=')) {\n            throwError(Messages.DefaultRestParameter);\n        }\n\n        if (!match(')')) {\n            throwError(Messages.ParameterAfterRestParameter);\n        }\n\n        return node.finishRestElement(param);\n    }\n\n    // ECMA-262 13.4 Empty Statement\n\n    function parseEmptyStatement(node) {\n        expect(';');\n        return node.finishEmptyStatement();\n    }\n\n    // ECMA-262 12.4 Expression Statement\n\n    function parseExpressionStatement(node) {\n        var expr = parseExpression();\n        consumeSemicolon();\n        return node.finishExpressionStatement(expr);\n    }\n\n    // ECMA-262 13.6 If statement\n\n    function parseIfStatement(node) {\n        var test, consequent, alternate;\n\n        expectKeyword('if');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        consequent = parseStatement();\n\n        if (matchKeyword('else')) {\n            lex();\n            alternate = parseStatement();\n        } else {\n            alternate = null;\n        }\n\n        return node.finishIfStatement(test, consequent, alternate);\n    }\n\n    // ECMA-262 13.7 Iteration Statements\n\n    function parseDoWhileStatement(node) {\n        var body, test, oldInIteration;\n\n        expectKeyword('do');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = parseStatement();\n\n        state.inIteration = oldInIteration;\n\n        expectKeyword('while');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        if (match(';')) {\n            lex();\n        }\n\n        return node.finishDoWhileStatement(body, test);\n    }\n\n    function parseWhileStatement(node) {\n        var test, body, oldInIteration;\n\n        expectKeyword('while');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = parseStatement();\n\n        state.inIteration = oldInIteration;\n\n        return node.finishWhileStatement(test, body);\n    }\n\n    function parseForStatement(node) {\n        var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations,\n            body, oldInIteration, previousAllowIn = state.allowIn;\n\n        init = test = update = null;\n        forIn = true;\n\n        expectKeyword('for');\n\n        expect('(');\n\n        if (match(';')) {\n            lex();\n        } else {\n            if (matchKeyword('var')) {\n                init = new Node();\n                lex();\n\n                state.allowIn = false;\n                declarations = parseVariableDeclarationList({ inFor: true });\n                state.allowIn = previousAllowIn;\n\n                if (declarations.length === 1 && matchKeyword('in')) {\n                    init = init.finishVariableDeclaration(declarations);\n                    lex();\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {\n                    init = init.finishVariableDeclaration(declarations);\n                    lex();\n                    left = init;\n                    right = parseAssignmentExpression();\n                    init = null;\n                    forIn = false;\n                } else {\n                    init = init.finishVariableDeclaration(declarations);\n                    expect(';');\n                }\n            } else if (matchKeyword('const') || matchKeyword('let')) {\n                init = new Node();\n                kind = lex().value;\n\n                if (!strict && lookahead.value === 'in') {\n                    init = init.finishIdentifier(kind);\n                    lex();\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else {\n                    state.allowIn = false;\n                    declarations = parseBindingList(kind, {inFor: true});\n                    state.allowIn = previousAllowIn;\n\n                    if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) {\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                        lex();\n                        left = init;\n                        right = parseExpression();\n                        init = null;\n                    } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                        lex();\n                        left = init;\n                        right = parseAssignmentExpression();\n                        init = null;\n                        forIn = false;\n                    } else {\n                        consumeSemicolon();\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                    }\n                }\n            } else {\n                initStartToken = lookahead;\n                state.allowIn = false;\n                init = inheritCoverGrammar(parseAssignmentExpression);\n                state.allowIn = previousAllowIn;\n\n                if (matchKeyword('in')) {\n                    if (!isAssignmentTarget) {\n                        tolerateError(Messages.InvalidLHSInForIn);\n                    }\n\n                    lex();\n                    reinterpretExpressionAsPattern(init);\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else if (matchContextualKeyword('of')) {\n                    if (!isAssignmentTarget) {\n                        tolerateError(Messages.InvalidLHSInForLoop);\n                    }\n\n                    lex();\n                    reinterpretExpressionAsPattern(init);\n                    left = init;\n                    right = parseAssignmentExpression();\n                    init = null;\n                    forIn = false;\n                } else {\n                    if (match(',')) {\n                        initSeq = [init];\n                        while (match(',')) {\n                            lex();\n                            initSeq.push(isolateCoverGrammar(parseAssignmentExpression));\n                        }\n                        init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq);\n                    }\n                    expect(';');\n                }\n            }\n        }\n\n        if (typeof left === 'undefined') {\n\n            if (!match(';')) {\n                test = parseExpression();\n            }\n            expect(';');\n\n            if (!match(')')) {\n                update = parseExpression();\n            }\n        }\n\n        expect(')');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = isolateCoverGrammar(parseStatement);\n\n        state.inIteration = oldInIteration;\n\n        return (typeof left === 'undefined') ?\n                node.finishForStatement(init, test, update, body) :\n                forIn ? node.finishForInStatement(left, right, body) :\n                    node.finishForOfStatement(left, right, body);\n    }\n\n    // ECMA-262 13.8 The continue statement\n\n    function parseContinueStatement(node) {\n        var label = null, key;\n\n        expectKeyword('continue');\n\n        // Optimize the most common form: 'continue;'.\n        if (source.charCodeAt(startIndex) === 0x3B) {\n            lex();\n\n            if (!state.inIteration) {\n                throwError(Messages.IllegalContinue);\n            }\n\n            return node.finishContinueStatement(null);\n        }\n\n        if (hasLineTerminator) {\n            if (!state.inIteration) {\n                throwError(Messages.IllegalContinue);\n            }\n\n            return node.finishContinueStatement(null);\n        }\n\n        if (lookahead.type === Token.Identifier) {\n            label = parseVariableIdentifier();\n\n            key = '$' + label.name;\n            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.UnknownLabel, label.name);\n            }\n        }\n\n        consumeSemicolon();\n\n        if (label === null && !state.inIteration) {\n            throwError(Messages.IllegalContinue);\n        }\n\n        return node.finishContinueStatement(label);\n    }\n\n    // ECMA-262 13.9 The break statement\n\n    function parseBreakStatement(node) {\n        var label = null, key;\n\n        expectKeyword('break');\n\n        // Catch the very common case first: immediately a semicolon (U+003B).\n        if (source.charCodeAt(lastIndex) === 0x3B) {\n            lex();\n\n            if (!(state.inIteration || state.inSwitch)) {\n                throwError(Messages.IllegalBreak);\n            }\n\n            return node.finishBreakStatement(null);\n        }\n\n        if (hasLineTerminator) {\n            if (!(state.inIteration || state.inSwitch)) {\n                throwError(Messages.IllegalBreak);\n            }\n        } else if (lookahead.type === Token.Identifier) {\n            label = parseVariableIdentifier();\n\n            key = '$' + label.name;\n            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.UnknownLabel, label.name);\n            }\n        }\n\n        consumeSemicolon();\n\n        if (label === null && !(state.inIteration || state.inSwitch)) {\n            throwError(Messages.IllegalBreak);\n        }\n\n        return node.finishBreakStatement(label);\n    }\n\n    // ECMA-262 13.10 The return statement\n\n    function parseReturnStatement(node) {\n        var argument = null;\n\n        expectKeyword('return');\n\n        if (!state.inFunctionBody) {\n            tolerateError(Messages.IllegalReturn);\n        }\n\n        // 'return' followed by a space and an identifier is very common.\n        if (source.charCodeAt(lastIndex) === 0x20) {\n            if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) {\n                argument = parseExpression();\n                consumeSemicolon();\n                return node.finishReturnStatement(argument);\n            }\n        }\n\n        if (hasLineTerminator) {\n            // HACK\n            return node.finishReturnStatement(null);\n        }\n\n        if (!match(';')) {\n            if (!match('}') && lookahead.type !== Token.EOF) {\n                argument = parseExpression();\n            }\n        }\n\n        consumeSemicolon();\n\n        return node.finishReturnStatement(argument);\n    }\n\n    // ECMA-262 13.11 The with statement\n\n    function parseWithStatement(node) {\n        var object, body;\n\n        if (strict) {\n            tolerateError(Messages.StrictModeWith);\n        }\n\n        expectKeyword('with');\n\n        expect('(');\n\n        object = parseExpression();\n\n        expect(')');\n\n        body = parseStatement();\n\n        return node.finishWithStatement(object, body);\n    }\n\n    // ECMA-262 13.12 The switch statement\n\n    function parseSwitchCase() {\n        var test, consequent = [], statement, node = new Node();\n\n        if (matchKeyword('default')) {\n            lex();\n            test = null;\n        } else {\n            expectKeyword('case');\n            test = parseExpression();\n        }\n        expect(':');\n\n        while (startIndex < length) {\n            if (match('}') || matchKeyword('default') || matchKeyword('case')) {\n                break;\n            }\n            statement = parseStatementListItem();\n            consequent.push(statement);\n        }\n\n        return node.finishSwitchCase(test, consequent);\n    }\n\n    function parseSwitchStatement(node) {\n        var discriminant, cases, clause, oldInSwitch, defaultFound;\n\n        expectKeyword('switch');\n\n        expect('(');\n\n        discriminant = parseExpression();\n\n        expect(')');\n\n        expect('{');\n\n        cases = [];\n\n        if (match('}')) {\n            lex();\n            return node.finishSwitchStatement(discriminant, cases);\n        }\n\n        oldInSwitch = state.inSwitch;\n        state.inSwitch = true;\n        defaultFound = false;\n\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            clause = parseSwitchCase();\n            if (clause.test === null) {\n                if (defaultFound) {\n                    throwError(Messages.MultipleDefaultsInSwitch);\n                }\n                defaultFound = true;\n            }\n            cases.push(clause);\n        }\n\n        state.inSwitch = oldInSwitch;\n\n        expect('}');\n\n        return node.finishSwitchStatement(discriminant, cases);\n    }\n\n    // ECMA-262 13.14 The throw statement\n\n    function parseThrowStatement(node) {\n        var argument;\n\n        expectKeyword('throw');\n\n        if (hasLineTerminator) {\n            throwError(Messages.NewlineAfterThrow);\n        }\n\n        argument = parseExpression();\n\n        consumeSemicolon();\n\n        return node.finishThrowStatement(argument);\n    }\n\n    // ECMA-262 13.15 The try statement\n\n    function parseCatchClause() {\n        var param, params = [], paramMap = {}, key, i, body, node = new Node();\n\n        expectKeyword('catch');\n\n        expect('(');\n        if (match(')')) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        param = parsePattern(params);\n        for (i = 0; i < params.length; i++) {\n            key = '$' + params[i].value;\n            if (Object.prototype.hasOwnProperty.call(paramMap, key)) {\n                tolerateError(Messages.DuplicateBinding, params[i].value);\n            }\n            paramMap[key] = true;\n        }\n\n        // ECMA-262 12.14.1\n        if (strict && isRestrictedWord(param.name)) {\n            tolerateError(Messages.StrictCatchVariable);\n        }\n\n        expect(')');\n        body = parseBlock();\n        return node.finishCatchClause(param, body);\n    }\n\n    function parseTryStatement(node) {\n        var block, handler = null, finalizer = null;\n\n        expectKeyword('try');\n\n        block = parseBlock();\n\n        if (matchKeyword('catch')) {\n            handler = parseCatchClause();\n        }\n\n        if (matchKeyword('finally')) {\n            lex();\n            finalizer = parseBlock();\n        }\n\n        if (!handler && !finalizer) {\n            throwError(Messages.NoCatchOrFinally);\n        }\n\n        return node.finishTryStatement(block, handler, finalizer);\n    }\n\n    // ECMA-262 13.16 The debugger statement\n\n    function parseDebuggerStatement(node) {\n        expectKeyword('debugger');\n\n        consumeSemicolon();\n\n        return node.finishDebuggerStatement();\n    }\n\n    // 13 Statements\n\n    function parseStatement() {\n        var type = lookahead.type,\n            expr,\n            labeledBody,\n            key,\n            node;\n\n        if (type === Token.EOF) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        if (type === Token.Punctuator && lookahead.value === '{') {\n            return parseBlock();\n        }\n        isAssignmentTarget = isBindingElement = true;\n        node = new Node();\n\n        if (type === Token.Punctuator) {\n            switch (lookahead.value) {\n            case ';':\n                return parseEmptyStatement(node);\n            case '(':\n                return parseExpressionStatement(node);\n            default:\n                break;\n            }\n        } else if (type === Token.Keyword) {\n            switch (lookahead.value) {\n            case 'break':\n                return parseBreakStatement(node);\n            case 'continue':\n                return parseContinueStatement(node);\n            case 'debugger':\n                return parseDebuggerStatement(node);\n            case 'do':\n                return parseDoWhileStatement(node);\n            case 'for':\n                return parseForStatement(node);\n            case 'function':\n                return parseFunctionDeclaration(node);\n            case 'if':\n                return parseIfStatement(node);\n            case 'return':\n                return parseReturnStatement(node);\n            case 'switch':\n                return parseSwitchStatement(node);\n            case 'throw':\n                return parseThrowStatement(node);\n            case 'try':\n                return parseTryStatement(node);\n            case 'var':\n                return parseVariableStatement(node);\n            case 'while':\n                return parseWhileStatement(node);\n            case 'with':\n                return parseWithStatement(node);\n            default:\n                break;\n            }\n        }\n\n        expr = parseExpression();\n\n        // ECMA-262 12.12 Labelled Statements\n        if ((expr.type === Syntax.Identifier) && match(':')) {\n            lex();\n\n            key = '$' + expr.name;\n            if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.Redeclaration, 'Label', expr.name);\n            }\n\n            state.labelSet[key] = true;\n            labeledBody = parseStatement();\n            delete state.labelSet[key];\n            return node.finishLabeledStatement(expr, labeledBody);\n        }\n\n        consumeSemicolon();\n\n        return node.finishExpressionStatement(expr);\n    }\n\n    // ECMA-262 14.1 Function Definition\n\n    function parseFunctionSourceElements() {\n        var statement, body = [], token, directive, firstRestricted,\n            oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount,\n            node = new Node();\n\n        expect('{');\n\n        while (startIndex < length) {\n            if (lookahead.type !== Token.StringLiteral) {\n                break;\n            }\n            token = lookahead;\n\n            statement = parseStatementListItem();\n            body.push(statement);\n            if (statement.expression.type !== Syntax.Literal) {\n                // this is not directive\n                break;\n            }\n            directive = source.slice(token.start + 1, token.end - 1);\n            if (directive === 'use strict') {\n                strict = true;\n                if (firstRestricted) {\n                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);\n                }\n            } else {\n                if (!firstRestricted && token.octal) {\n                    firstRestricted = token;\n                }\n            }\n        }\n\n        oldLabelSet = state.labelSet;\n        oldInIteration = state.inIteration;\n        oldInSwitch = state.inSwitch;\n        oldInFunctionBody = state.inFunctionBody;\n        oldParenthesisCount = state.parenthesizedCount;\n\n        state.labelSet = {};\n        state.inIteration = false;\n        state.inSwitch = false;\n        state.inFunctionBody = true;\n        state.parenthesizedCount = 0;\n\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            body.push(parseStatementListItem());\n        }\n\n        expect('}');\n\n        state.labelSet = oldLabelSet;\n        state.inIteration = oldInIteration;\n        state.inSwitch = oldInSwitch;\n        state.inFunctionBody = oldInFunctionBody;\n        state.parenthesizedCount = oldParenthesisCount;\n\n        return node.finishBlockStatement(body);\n    }\n\n    function validateParam(options, param, name) {\n        var key = '$' + name;\n        if (strict) {\n            if (isRestrictedWord(name)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamName;\n            }\n            if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamDupe;\n            }\n        } else if (!options.firstRestricted) {\n            if (isRestrictedWord(name)) {\n                options.firstRestricted = param;\n                options.message = Messages.StrictParamName;\n            } else if (isStrictModeReservedWord(name)) {\n                options.firstRestricted = param;\n                options.message = Messages.StrictReservedWord;\n            } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamDupe;\n            }\n        }\n        options.paramSet[key] = true;\n    }\n\n    function parseParam(options) {\n        var token, param, params = [], i, def;\n\n        token = lookahead;\n        if (token.value === '...') {\n            param = parseRestElement(params);\n            validateParam(options, param.argument, param.argument.name);\n            options.params.push(param);\n            options.defaults.push(null);\n            return false;\n        }\n\n        param = parsePatternWithDefault(params);\n        for (i = 0; i < params.length; i++) {\n            validateParam(options, params[i], params[i].value);\n        }\n\n        if (param.type === Syntax.AssignmentPattern) {\n            def = param.right;\n            param = param.left;\n            ++options.defaultCount;\n        }\n\n        options.params.push(param);\n        options.defaults.push(def);\n\n        return !match(')');\n    }\n\n    function parseParams(firstRestricted) {\n        var options;\n\n        options = {\n            params: [],\n            defaultCount: 0,\n            defaults: [],\n            firstRestricted: firstRestricted\n        };\n\n        expect('(');\n\n        if (!match(')')) {\n            options.paramSet = {};\n            while (startIndex < length) {\n                if (!parseParam(options)) {\n                    break;\n                }\n                expect(',');\n            }\n        }\n\n        expect(')');\n\n        if (options.defaultCount === 0) {\n            options.defaults = [];\n        }\n\n        return {\n            params: options.params,\n            defaults: options.defaults,\n            stricted: options.stricted,\n            firstRestricted: options.firstRestricted,\n            message: options.message\n        };\n    }\n\n    function parseFunctionDeclaration(node, identifierIsOptional) {\n        var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict,\n            isGenerator, previousAllowYield;\n\n        previousAllowYield = state.allowYield;\n\n        expectKeyword('function');\n\n        isGenerator = match('*');\n        if (isGenerator) {\n            lex();\n        }\n\n        if (!identifierIsOptional || !match('(')) {\n            token = lookahead;\n            id = parseVariableIdentifier();\n            if (strict) {\n                if (isRestrictedWord(token.value)) {\n                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);\n                }\n            } else {\n                if (isRestrictedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictFunctionName;\n                } else if (isStrictModeReservedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictReservedWord;\n                }\n            }\n        }\n\n        state.allowYield = !isGenerator;\n        tmp = parseParams(firstRestricted);\n        params = tmp.params;\n        defaults = tmp.defaults;\n        stricted = tmp.stricted;\n        firstRestricted = tmp.firstRestricted;\n        if (tmp.message) {\n            message = tmp.message;\n        }\n\n\n        previousStrict = strict;\n        body = parseFunctionSourceElements();\n        if (strict && firstRestricted) {\n            throwUnexpectedToken(firstRestricted, message);\n        }\n        if (strict && stricted) {\n            tolerateUnexpectedToken(stricted, message);\n        }\n\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator);\n    }\n\n    function parseFunctionExpression() {\n        var token, id = null, stricted, firstRestricted, message, tmp,\n            params = [], defaults = [], body, previousStrict, node = new Node(),\n            isGenerator, previousAllowYield;\n\n        previousAllowYield = state.allowYield;\n\n        expectKeyword('function');\n\n        isGenerator = match('*');\n        if (isGenerator) {\n            lex();\n        }\n\n        state.allowYield = !isGenerator;\n        if (!match('(')) {\n            token = lookahead;\n            id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier();\n            if (strict) {\n                if (isRestrictedWord(token.value)) {\n                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);\n                }\n            } else {\n                if (isRestrictedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictFunctionName;\n                } else if (isStrictModeReservedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictReservedWord;\n                }\n            }\n        }\n\n        tmp = parseParams(firstRestricted);\n        params = tmp.params;\n        defaults = tmp.defaults;\n        stricted = tmp.stricted;\n        firstRestricted = tmp.firstRestricted;\n        if (tmp.message) {\n            message = tmp.message;\n        }\n\n        previousStrict = strict;\n        body = parseFunctionSourceElements();\n        if (strict && firstRestricted) {\n            throwUnexpectedToken(firstRestricted, message);\n        }\n        if (strict && stricted) {\n            tolerateUnexpectedToken(stricted, message);\n        }\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishFunctionExpression(id, params, defaults, body, isGenerator);\n    }\n\n    // ECMA-262 14.5 Class Definitions\n\n    function parseClassBody() {\n        var classBody, token, isStatic, hasConstructor = false, body, method, computed, key;\n\n        classBody = new Node();\n\n        expect('{');\n        body = [];\n        while (!match('}')) {\n            if (match(';')) {\n                lex();\n            } else {\n                method = new Node();\n                token = lookahead;\n                isStatic = false;\n                computed = match('[');\n                if (match('*')) {\n                    lex();\n                } else {\n                    key = parseObjectPropertyKey();\n                    if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) {\n                        token = lookahead;\n                        isStatic = true;\n                        computed = match('[');\n                        if (match('*')) {\n                            lex();\n                        } else {\n                            key = parseObjectPropertyKey();\n                        }\n                    }\n                }\n                method = tryParseMethodDefinition(token, key, computed, method);\n                if (method) {\n                    method['static'] = isStatic; // jscs:ignore requireDotNotation\n                    if (method.kind === 'init') {\n                        method.kind = 'method';\n                    }\n                    if (!isStatic) {\n                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') {\n                            if (method.kind !== 'method' || !method.method || method.value.generator) {\n                                throwUnexpectedToken(token, Messages.ConstructorSpecialMethod);\n                            }\n                            if (hasConstructor) {\n                                throwUnexpectedToken(token, Messages.DuplicateConstructor);\n                            } else {\n                                hasConstructor = true;\n                            }\n                            method.kind = 'constructor';\n                        }\n                    } else {\n                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') {\n                            throwUnexpectedToken(token, Messages.StaticPrototype);\n                        }\n                    }\n                    method.type = Syntax.MethodDefinition;\n                    delete method.method;\n                    delete method.shorthand;\n                    body.push(method);\n                } else {\n                    throwUnexpectedToken(lookahead);\n                }\n            }\n        }\n        lex();\n        return classBody.finishClassBody(body);\n    }\n\n    function parseClassDeclaration(identifierIsOptional) {\n        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;\n        strict = true;\n\n        expectKeyword('class');\n\n        if (!identifierIsOptional || lookahead.type === Token.Identifier) {\n            id = parseVariableIdentifier();\n        }\n\n        if (matchKeyword('extends')) {\n            lex();\n            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);\n        }\n        classBody = parseClassBody();\n        strict = previousStrict;\n\n        return classNode.finishClassDeclaration(id, superClass, classBody);\n    }\n\n    function parseClassExpression() {\n        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;\n        strict = true;\n\n        expectKeyword('class');\n\n        if (lookahead.type === Token.Identifier) {\n            id = parseVariableIdentifier();\n        }\n\n        if (matchKeyword('extends')) {\n            lex();\n            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);\n        }\n        classBody = parseClassBody();\n        strict = previousStrict;\n\n        return classNode.finishClassExpression(id, superClass, classBody);\n    }\n\n    // ECMA-262 15.2 Modules\n\n    function parseModuleSpecifier() {\n        var node = new Node();\n\n        if (lookahead.type !== Token.StringLiteral) {\n            throwError(Messages.InvalidModuleSpecifier);\n        }\n        return node.finishLiteral(lex());\n    }\n\n    // ECMA-262 15.2.3 Exports\n\n    function parseExportSpecifier() {\n        var exported, local, node = new Node(), def;\n        if (matchKeyword('default')) {\n            // export {default} from 'something';\n            def = new Node();\n            lex();\n            local = def.finishIdentifier('default');\n        } else {\n            local = parseVariableIdentifier();\n        }\n        if (matchContextualKeyword('as')) {\n            lex();\n            exported = parseNonComputedProperty();\n        }\n        return node.finishExportSpecifier(local, exported);\n    }\n\n    function parseExportNamedDeclaration(node) {\n        var declaration = null,\n            isExportFromIdentifier,\n            src = null, specifiers = [];\n\n        // non-default export\n        if (lookahead.type === Token.Keyword) {\n            // covers:\n            // export var f = 1;\n            switch (lookahead.value) {\n                case 'let':\n                case 'const':\n                    declaration = parseLexicalDeclaration({inFor: false});\n                    return node.finishExportNamedDeclaration(declaration, specifiers, null);\n                case 'var':\n                case 'class':\n                case 'function':\n                    declaration = parseStatementListItem();\n                    return node.finishExportNamedDeclaration(declaration, specifiers, null);\n            }\n        }\n\n        expect('{');\n        while (!match('}')) {\n            isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default');\n            specifiers.push(parseExportSpecifier());\n            if (!match('}')) {\n                expect(',');\n                if (match('}')) {\n                    break;\n                }\n            }\n        }\n        expect('}');\n\n        if (matchContextualKeyword('from')) {\n            // covering:\n            // export {default} from 'foo';\n            // export {foo} from 'foo';\n            lex();\n            src = parseModuleSpecifier();\n            consumeSemicolon();\n        } else if (isExportFromIdentifier) {\n            // covering:\n            // export {default}; // missing fromClause\n            throwError(lookahead.value ?\n                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n        } else {\n            // cover\n            // export {foo};\n            consumeSemicolon();\n        }\n        return node.finishExportNamedDeclaration(declaration, specifiers, src);\n    }\n\n    function parseExportDefaultDeclaration(node) {\n        var declaration = null,\n            expression = null;\n\n        // covers:\n        // export default ...\n        expectKeyword('default');\n\n        if (matchKeyword('function')) {\n            // covers:\n            // export default function foo () {}\n            // export default function () {}\n            declaration = parseFunctionDeclaration(new Node(), true);\n            return node.finishExportDefaultDeclaration(declaration);\n        }\n        if (matchKeyword('class')) {\n            declaration = parseClassDeclaration(true);\n            return node.finishExportDefaultDeclaration(declaration);\n        }\n\n        if (matchContextualKeyword('from')) {\n            throwError(Messages.UnexpectedToken, lookahead.value);\n        }\n\n        // covers:\n        // export default {};\n        // export default [];\n        // export default (1 + 2);\n        if (match('{')) {\n            expression = parseObjectInitializer();\n        } else if (match('[')) {\n            expression = parseArrayInitializer();\n        } else {\n            expression = parseAssignmentExpression();\n        }\n        consumeSemicolon();\n        return node.finishExportDefaultDeclaration(expression);\n    }\n\n    function parseExportAllDeclaration(node) {\n        var src;\n\n        // covers:\n        // export * from 'foo';\n        expect('*');\n        if (!matchContextualKeyword('from')) {\n            throwError(lookahead.value ?\n                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n        }\n        lex();\n        src = parseModuleSpecifier();\n        consumeSemicolon();\n\n        return node.finishExportAllDeclaration(src);\n    }\n\n    function parseExportDeclaration() {\n        var node = new Node();\n        if (state.inFunctionBody) {\n            throwError(Messages.IllegalExportDeclaration);\n        }\n\n        expectKeyword('export');\n\n        if (matchKeyword('default')) {\n            return parseExportDefaultDeclaration(node);\n        }\n        if (match('*')) {\n            return parseExportAllDeclaration(node);\n        }\n        return parseExportNamedDeclaration(node);\n    }\n\n    // ECMA-262 15.2.2 Imports\n\n    function parseImportSpecifier() {\n        // import {<foo as bar>} ...;\n        var local, imported, node = new Node();\n\n        imported = parseNonComputedProperty();\n        if (matchContextualKeyword('as')) {\n            lex();\n            local = parseVariableIdentifier();\n        }\n\n        return node.finishImportSpecifier(local, imported);\n    }\n\n    function parseNamedImports() {\n        var specifiers = [];\n        // {foo, bar as bas}\n        expect('{');\n        while (!match('}')) {\n            specifiers.push(parseImportSpecifier());\n            if (!match('}')) {\n                expect(',');\n                if (match('}')) {\n                    break;\n                }\n            }\n        }\n        expect('}');\n        return specifiers;\n    }\n\n    function parseImportDefaultSpecifier() {\n        // import <foo> ...;\n        var local, node = new Node();\n\n        local = parseNonComputedProperty();\n\n        return node.finishImportDefaultSpecifier(local);\n    }\n\n    function parseImportNamespaceSpecifier() {\n        // import <* as foo> ...;\n        var local, node = new Node();\n\n        expect('*');\n        if (!matchContextualKeyword('as')) {\n            throwError(Messages.NoAsAfterImportNamespace);\n        }\n        lex();\n        local = parseNonComputedProperty();\n\n        return node.finishImportNamespaceSpecifier(local);\n    }\n\n    function parseImportDeclaration() {\n        var specifiers = [], src, node = new Node();\n\n        if (state.inFunctionBody) {\n            throwError(Messages.IllegalImportDeclaration);\n        }\n\n        expectKeyword('import');\n\n        if (lookahead.type === Token.StringLiteral) {\n            // import 'foo';\n            src = parseModuleSpecifier();\n        } else {\n\n            if (match('{')) {\n                // import {bar}\n                specifiers = specifiers.concat(parseNamedImports());\n            } else if (match('*')) {\n                // import * as foo\n                specifiers.push(parseImportNamespaceSpecifier());\n            } else if (isIdentifierName(lookahead) && !matchKeyword('default')) {\n                // import foo\n                specifiers.push(parseImportDefaultSpecifier());\n                if (match(',')) {\n                    lex();\n                    if (match('*')) {\n                        // import foo, * as foo\n                        specifiers.push(parseImportNamespaceSpecifier());\n                    } else if (match('{')) {\n                        // import foo, {bar}\n                        specifiers = specifiers.concat(parseNamedImports());\n                    } else {\n                        throwUnexpectedToken(lookahead);\n                    }\n                }\n            } else {\n                throwUnexpectedToken(lex());\n            }\n\n            if (!matchContextualKeyword('from')) {\n                throwError(lookahead.value ?\n                        Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n            }\n            lex();\n            src = parseModuleSpecifier();\n        }\n\n        consumeSemicolon();\n        return node.finishImportDeclaration(specifiers, src);\n    }\n\n    // ECMA-262 15.1 Scripts\n\n    function parseScriptBody() {\n        var statement, body = [], token, directive, firstRestricted;\n\n        while (startIndex < length) {\n            token = lookahead;\n            if (token.type !== Token.StringLiteral) {\n                break;\n            }\n\n            statement = parseStatementListItem();\n            body.push(statement);\n            if (statement.expression.type !== Syntax.Literal) {\n                // this is not directive\n                break;\n            }\n            directive = source.slice(token.start + 1, token.end - 1);\n            if (directive === 'use strict') {\n                strict = true;\n                if (firstRestricted) {\n                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);\n                }\n            } else {\n                if (!firstRestricted && token.octal) {\n                    firstRestricted = token;\n                }\n            }\n        }\n\n        while (startIndex < length) {\n            statement = parseStatementListItem();\n            /* istanbul ignore if */\n            if (typeof statement === 'undefined') {\n                break;\n            }\n            body.push(statement);\n        }\n        return body;\n    }\n\n    function parseProgram() {\n        var body, node;\n\n        peek();\n        node = new Node();\n\n        body = parseScriptBody();\n        return node.finishProgram(body, state.sourceType);\n    }\n\n    function filterTokenLocation() {\n        var i, entry, token, tokens = [];\n\n        for (i = 0; i < extra.tokens.length; ++i) {\n            entry = extra.tokens[i];\n            token = {\n                type: entry.type,\n                value: entry.value\n            };\n            if (entry.regex) {\n                token.regex = {\n                    pattern: entry.regex.pattern,\n                    flags: entry.regex.flags\n                };\n            }\n            if (extra.range) {\n                token.range = entry.range;\n            }\n            if (extra.loc) {\n                token.loc = entry.loc;\n            }\n            tokens.push(token);\n        }\n\n        extra.tokens = tokens;\n    }\n\n    function tokenize(code, options, delegate) {\n        var toString,\n            tokens;\n\n        toString = String;\n        if (typeof code !== 'string' && !(code instanceof String)) {\n            code = toString(code);\n        }\n\n        source = code;\n        index = 0;\n        lineNumber = (source.length > 0) ? 1 : 0;\n        lineStart = 0;\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n        length = source.length;\n        lookahead = null;\n        state = {\n            allowIn: true,\n            allowYield: true,\n            labelSet: {},\n            inFunctionBody: false,\n            inIteration: false,\n            inSwitch: false,\n            lastCommentStart: -1,\n            curlyStack: []\n        };\n\n        extra = {};\n\n        // Options matching.\n        options = options || {};\n\n        // Of course we collect tokens here.\n        options.tokens = true;\n        extra.tokens = [];\n        extra.tokenValues = [];\n        extra.tokenize = true;\n        extra.delegate = delegate;\n\n        // The following two fields are necessary to compute the Regex tokens.\n        extra.openParenToken = -1;\n        extra.openCurlyToken = -1;\n\n        extra.range = (typeof options.range === 'boolean') && options.range;\n        extra.loc = (typeof options.loc === 'boolean') && options.loc;\n\n        if (typeof options.comment === 'boolean' && options.comment) {\n            extra.comments = [];\n        }\n        if (typeof options.tolerant === 'boolean' && options.tolerant) {\n            extra.errors = [];\n        }\n\n        try {\n            peek();\n            if (lookahead.type === Token.EOF) {\n                return extra.tokens;\n            }\n\n            lex();\n            while (lookahead.type !== Token.EOF) {\n                try {\n                    lex();\n                } catch (lexError) {\n                    if (extra.errors) {\n                        recordError(lexError);\n                        // We have to break on the first error\n                        // to avoid infinite loops.\n                        break;\n                    } else {\n                        throw lexError;\n                    }\n                }\n            }\n\n            tokens = extra.tokens;\n            if (typeof extra.errors !== 'undefined') {\n                tokens.errors = extra.errors;\n            }\n        } catch (e) {\n            throw e;\n        } finally {\n            extra = {};\n        }\n        return tokens;\n    }\n\n    function parse(code, options) {\n        var program, toString;\n\n        toString = String;\n        if (typeof code !== 'string' && !(code instanceof String)) {\n            code = toString(code);\n        }\n\n        source = code;\n        index = 0;\n        lineNumber = (source.length > 0) ? 1 : 0;\n        lineStart = 0;\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n        length = source.length;\n        lookahead = null;\n        state = {\n            allowIn: true,\n            allowYield: true,\n            labelSet: {},\n            inFunctionBody: false,\n            inIteration: false,\n            inSwitch: false,\n            lastCommentStart: -1,\n            curlyStack: [],\n            sourceType: 'script'\n        };\n        strict = false;\n\n        extra = {};\n        if (typeof options !== 'undefined') {\n            extra.range = (typeof options.range === 'boolean') && options.range;\n            extra.loc = (typeof options.loc === 'boolean') && options.loc;\n            extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment;\n\n            if (extra.loc && options.source !== null && options.source !== undefined) {\n                extra.source = toString(options.source);\n            }\n\n            if (typeof options.tokens === 'boolean' && options.tokens) {\n                extra.tokens = [];\n            }\n            if (typeof options.comment === 'boolean' && options.comment) {\n                extra.comments = [];\n            }\n            if (typeof options.tolerant === 'boolean' && options.tolerant) {\n                extra.errors = [];\n            }\n            if (extra.attachComment) {\n                extra.range = true;\n                extra.comments = [];\n                extra.bottomRightStack = [];\n                extra.trailingComments = [];\n                extra.leadingComments = [];\n            }\n            if (options.sourceType === 'module') {\n                // very restrictive condition for now\n                state.sourceType = options.sourceType;\n                strict = true;\n            }\n        }\n\n        try {\n            program = parseProgram();\n            if (typeof extra.comments !== 'undefined') {\n                program.comments = extra.comments;\n            }\n            if (typeof extra.tokens !== 'undefined') {\n                filterTokenLocation();\n                program.tokens = extra.tokens;\n            }\n            if (typeof extra.errors !== 'undefined') {\n                program.errors = extra.errors;\n            }\n        } catch (e) {\n            throw e;\n        } finally {\n            extra = {};\n        }\n\n        return program;\n    }\n\n    // Sync with *.json manifests.\n    exports.version = '2.7.1';\n\n    exports.tokenize = tokenize;\n\n    exports.parse = parse;\n\n    // Deep copy.\n    /* istanbul ignore next */\n    exports.Syntax = (function () {\n        var name, types = {};\n\n        if (typeof Object.create === 'function') {\n            types = Object.create(null);\n        }\n\n        for (name in Syntax) {\n            if (Syntax.hasOwnProperty(name)) {\n                types[name] = Syntax[name];\n            }\n        }\n\n        if (typeof Object.freeze === 'function') {\n            Object.freeze(types);\n        }\n\n        return types;\n    }());\n\n}));\n/* vim: set sw=4 ts=4 et tw=80 : */\n",
+    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nfunction EventEmitter() {\n  this._events = this._events || {};\n  this._maxListeners = this._maxListeners || undefined;\n}\nmodule.exports = EventEmitter;\n\n// Backwards-compat with node 0.10.x\nEventEmitter.EventEmitter = EventEmitter;\n\nEventEmitter.prototype._events = undefined;\nEventEmitter.prototype._maxListeners = undefined;\n\n// By default EventEmitters will print a warning if more than 10 listeners are\n// added to it. This is a useful default which helps finding memory leaks.\nEventEmitter.defaultMaxListeners = 10;\n\n// Obviously not all Emitters should be limited to 10. This function allows\n// that to be increased. Set to zero for unlimited.\nEventEmitter.prototype.setMaxListeners = function(n) {\n  if (!isNumber(n) || n < 0 || isNaN(n))\n    throw TypeError('n must be a positive number');\n  this._maxListeners = n;\n  return this;\n};\n\nEventEmitter.prototype.emit = function(type) {\n  var er, handler, len, args, i, listeners;\n\n  if (!this._events)\n    this._events = {};\n\n  // If there is no 'error' event listener then throw.\n  if (type === 'error') {\n    if (!this._events.error ||\n        (isObject(this._events.error) && !this._events.error.length)) {\n      er = arguments[1];\n      if (er instanceof Error) {\n        throw er; // Unhandled 'error' event\n      }\n      throw TypeError('Uncaught, unspecified \"error\" event.');\n    }\n  }\n\n  handler = this._events[type];\n\n  if (isUndefined(handler))\n    return false;\n\n  if (isFunction(handler)) {\n    switch (arguments.length) {\n      // fast cases\n      case 1:\n        handler.call(this);\n        break;\n      case 2:\n        handler.call(this, arguments[1]);\n        break;\n      case 3:\n        handler.call(this, arguments[1], arguments[2]);\n        break;\n      // slower\n      default:\n        args = Array.prototype.slice.call(arguments, 1);\n        handler.apply(this, args);\n    }\n  } else if (isObject(handler)) {\n    args = Array.prototype.slice.call(arguments, 1);\n    listeners = handler.slice();\n    len = listeners.length;\n    for (i = 0; i < len; i++)\n      listeners[i].apply(this, args);\n  }\n\n  return true;\n};\n\nEventEmitter.prototype.addListener = function(type, listener) {\n  var m;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events)\n    this._events = {};\n\n  // To avoid recursion in the case that type === \"newListener\"! Before\n  // adding it to the listeners, first emit \"newListener\".\n  if (this._events.newListener)\n    this.emit('newListener', type,\n              isFunction(listener.listener) ?\n              listener.listener : listener);\n\n  if (!this._events[type])\n    // Optimize the case of one listener. Don't need the extra array object.\n    this._events[type] = listener;\n  else if (isObject(this._events[type]))\n    // If we've already got an array, just append.\n    this._events[type].push(listener);\n  else\n    // Adding the second element, need to change to array.\n    this._events[type] = [this._events[type], listener];\n\n  // Check for listener leak\n  if (isObject(this._events[type]) && !this._events[type].warned) {\n    if (!isUndefined(this._maxListeners)) {\n      m = this._maxListeners;\n    } else {\n      m = EventEmitter.defaultMaxListeners;\n    }\n\n    if (m && m > 0 && this._events[type].length > m) {\n      this._events[type].warned = true;\n      console.error('(node) warning: possible EventEmitter memory ' +\n                    'leak detected. %d listeners added. ' +\n                    'Use emitter.setMaxListeners() to increase limit.',\n                    this._events[type].length);\n      if (typeof console.trace === 'function') {\n        // not supported in IE 10\n        console.trace();\n      }\n    }\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.once = function(type, listener) {\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  var fired = false;\n\n  function g() {\n    this.removeListener(type, g);\n\n    if (!fired) {\n      fired = true;\n      listener.apply(this, arguments);\n    }\n  }\n\n  g.listener = listener;\n  this.on(type, g);\n\n  return this;\n};\n\n// emits a 'removeListener' event iff the listener was removed\nEventEmitter.prototype.removeListener = function(type, listener) {\n  var list, position, length, i;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events || !this._events[type])\n    return this;\n\n  list = this._events[type];\n  length = list.length;\n  position = -1;\n\n  if (list === listener ||\n      (isFunction(list.listener) && list.listener === listener)) {\n    delete this._events[type];\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n\n  } else if (isObject(list)) {\n    for (i = length; i-- > 0;) {\n      if (list[i] === listener ||\n          (list[i].listener && list[i].listener === listener)) {\n        position = i;\n        break;\n      }\n    }\n\n    if (position < 0)\n      return this;\n\n    if (list.length === 1) {\n      list.length = 0;\n      delete this._events[type];\n    } else {\n      list.splice(position, 1);\n    }\n\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.removeAllListeners = function(type) {\n  var key, listeners;\n\n  if (!this._events)\n    return this;\n\n  // not listening for removeListener, no need to emit\n  if (!this._events.removeListener) {\n    if (arguments.length === 0)\n      this._events = {};\n    else if (this._events[type])\n      delete this._events[type];\n    return this;\n  }\n\n  // emit removeListener for all listeners on all events\n  if (arguments.length === 0) {\n    for (key in this._events) {\n      if (key === 'removeListener') continue;\n      this.removeAllListeners(key);\n    }\n    this.removeAllListeners('removeListener');\n    this._events = {};\n    return this;\n  }\n\n  listeners = this._events[type];\n\n  if (isFunction(listeners)) {\n    this.removeListener(type, listeners);\n  } else if (listeners) {\n    // LIFO order\n    while (listeners.length)\n      this.removeListener(type, listeners[listeners.length - 1]);\n  }\n  delete this._events[type];\n\n  return this;\n};\n\nEventEmitter.prototype.listeners = function(type) {\n  var ret;\n  if (!this._events || !this._events[type])\n    ret = [];\n  else if (isFunction(this._events[type]))\n    ret = [this._events[type]];\n  else\n    ret = this._events[type].slice();\n  return ret;\n};\n\nEventEmitter.prototype.listenerCount = function(type) {\n  if (this._events) {\n    var evlistener = this._events[type];\n\n    if (isFunction(evlistener))\n      return 1;\n    else if (evlistener)\n      return evlistener.length;\n  }\n  return 0;\n};\n\nEventEmitter.listenerCount = function(emitter, type) {\n  return emitter.listenerCount(type);\n};\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\n",
     "var http = require('http');\n\nvar https = module.exports;\n\nfor (var key in http) {\n    if (http.hasOwnProperty(key)) https[key] = http[key];\n};\n\nhttps.request = function (params, cb) {\n    if (!params) params = {};\n    params.scheme = 'https';\n    params.protocol = 'https:';\n    return http.request.call(this, params, cb);\n}\n",
     "exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = nBytes * 8 - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = nBytes * 8 - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = (value * c - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n",
-    "\nvar indexOf = [].indexOf;\n\nmodule.exports = function(arr, obj){\n  if (indexOf) return arr.indexOf(obj);\n  for (var i = 0; i < arr.length; ++i) {\n    if (arr[i] === obj) return i;\n  }\n  return -1;\n};",
+    "/*!\n * node-inherit\n * Copyright(c) 2011 Dmitry Filatov <dfilatov@yandex-team.ru>\n * MIT Licensed\n */\n\nmodule.exports = require('./lib/inherit');\n",
+    "/**\n * @module inherit\n * @version 2.2.2\n * @author Filatov Dmitry <dfilatov@yandex-team.ru>\n * @description This module provides some syntax sugar for \"class\" declarations, constructors, mixins, \"super\" calls and static members.\n */\n\n(function(global) {\n\nvar hasIntrospection = (function(){'_';}).toString().indexOf('_') > -1,\n    emptyBase = function() {},\n    hasOwnProperty = Object.prototype.hasOwnProperty,\n    objCreate = Object.create || function(ptp) {\n        var inheritance = function() {};\n        inheritance.prototype = ptp;\n        return new inheritance();\n    },\n    objKeys = Object.keys || function(obj) {\n        var res = [];\n        for(var i in obj) {\n            hasOwnProperty.call(obj, i) && res.push(i);\n        }\n        return res;\n    },\n    extend = function(o1, o2) {\n        for(var i in o2) {\n            hasOwnProperty.call(o2, i) && (o1[i] = o2[i]);\n        }\n\n        return o1;\n    },\n    toStr = Object.prototype.toString,\n    isArray = Array.isArray || function(obj) {\n        return toStr.call(obj) === '[object Array]';\n    },\n    isFunction = function(obj) {\n        return toStr.call(obj) === '[object Function]';\n    },\n    noOp = function() {},\n    needCheckProps = true,\n    testPropObj = { toString : '' };\n\nfor(var i in testPropObj) { // fucking ie hasn't toString, valueOf in for\n    testPropObj.hasOwnProperty(i) && (needCheckProps = false);\n}\n\nvar specProps = needCheckProps? ['toString', 'valueOf'] : null;\n\nfunction getPropList(obj) {\n    var res = objKeys(obj);\n    if(needCheckProps) {\n        var specProp, i = 0;\n        while(specProp = specProps[i++]) {\n            obj.hasOwnProperty(specProp) && res.push(specProp);\n        }\n    }\n\n    return res;\n}\n\nfunction override(base, res, add) {\n    var addList = getPropList(add),\n        j = 0, len = addList.length,\n        name, prop;\n    while(j < len) {\n        if((name = addList[j++]) === '__self') {\n            continue;\n        }\n        prop = add[name];\n        if(isFunction(prop) &&\n                (!hasIntrospection || prop.toString().indexOf('.__base') > -1)) {\n            res[name] = (function(name, prop) {\n                var baseMethod = base[name]?\n                        base[name] :\n                        name === '__constructor'? // case of inheritance from plane function\n                            res.__self.__parent :\n                            noOp;\n                return function() {\n                    var baseSaved = this.__base;\n                    this.__base = baseMethod;\n                    var res = prop.apply(this, arguments);\n                    this.__base = baseSaved;\n                    return res;\n                };\n            })(name, prop);\n        } else {\n            res[name] = prop;\n        }\n    }\n}\n\nfunction applyMixins(mixins, res) {\n    var i = 1, mixin;\n    while(mixin = mixins[i++]) {\n        res?\n            isFunction(mixin)?\n                inherit.self(res, mixin.prototype, mixin) :\n                inherit.self(res, mixin) :\n            res = isFunction(mixin)?\n                inherit(mixins[0], mixin.prototype, mixin) :\n                inherit(mixins[0], mixin);\n    }\n    return res || mixins[0];\n}\n\n/**\n* Creates class\n* @exports\n* @param {Function|Array} [baseClass|baseClassAndMixins] class (or class and mixins) to inherit from\n* @param {Object} prototypeFields\n* @param {Object} [staticFields]\n* @returns {Function} class\n*/\nfunction inherit() {\n    var args = arguments,\n        withMixins = isArray(args[0]),\n        hasBase = withMixins || isFunction(args[0]),\n        base = hasBase? withMixins? applyMixins(args[0]) : args[0] : emptyBase,\n        props = args[hasBase? 1 : 0] || {},\n        staticProps = args[hasBase? 2 : 1],\n        res = props.__constructor || (hasBase && base.prototype.__constructor)?\n            function() {\n                return this.__constructor.apply(this, arguments);\n            } :\n            hasBase?\n                function() {\n                    return base.apply(this, arguments);\n                } :\n                function() {};\n\n    if(!hasBase) {\n        res.prototype = props;\n        res.prototype.__self = res.prototype.constructor = res;\n        return extend(res, staticProps);\n    }\n\n    extend(res, base);\n\n    res.__parent = base;\n\n    var basePtp = base.prototype,\n        resPtp = res.prototype = objCreate(basePtp);\n\n    resPtp.__self = resPtp.constructor = res;\n\n    props && override(basePtp, resPtp, props);\n    staticProps && override(base, res, staticProps);\n\n    return res;\n}\n\ninherit.self = function() {\n    var args = arguments,\n        withMixins = isArray(args[0]),\n        base = withMixins? applyMixins(args[0], args[0][0]) : args[0],\n        props = args[1],\n        staticProps = args[2],\n        basePtp = base.prototype;\n\n    props && override(basePtp, basePtp, props);\n    staticProps && override(base, base, staticProps);\n\n    return base;\n};\n\nvar defineAsGlobal = true;\nif(typeof exports === 'object') {\n    module.exports = inherit;\n    defineAsGlobal = false;\n}\n\nif(typeof modules === 'object') {\n    modules.define('inherit', function(provide) {\n        provide(inherit);\n    });\n    defineAsGlobal = false;\n}\n\nif(typeof define === 'function') {\n    define(function(require, exports, module) {\n        module.exports = inherit;\n    });\n    defineAsGlobal = false;\n}\n\ndefineAsGlobal && (global.inherit = inherit);\n\n})(this);\n",
     "if (typeof Object.create === 'function') {\n  // implementation from standard node.js 'util' module\n  module.exports = function inherits(ctor, superCtor) {\n    ctor.super_ = superCtor\n    ctor.prototype = Object.create(superCtor.prototype, {\n      constructor: {\n        value: ctor,\n        enumerable: false,\n        writable: true,\n        configurable: true\n      }\n    });\n  };\n} else {\n  // old school shim for old browsers\n  module.exports = function inherits(ctor, superCtor) {\n    ctor.super_ = superCtor\n    var TempCtor = function () {}\n    TempCtor.prototype = superCtor.prototype\n    ctor.prototype = new TempCtor()\n    ctor.prototype.constructor = ctor\n  }\n}\n",
-    "\n/**\n * isArray\n */\n\nvar isArray = Array.isArray;\n\n/**\n * toString\n */\n\nvar str = Object.prototype.toString;\n\n/**\n * Whether or not the given `val`\n * is an array.\n *\n * example:\n *\n *        isArray([]);\n *        // > true\n *        isArray(arguments);\n *        // > false\n *        isArray('');\n *        // > false\n *\n * @param {mixed} val\n * @return {bool}\n */\n\nmodule.exports = isArray || function (val) {\n  return !! val && '[object Array]' == str.call(val);\n};\n",
     "/**\n * Determine if an object is Buffer\n *\n * Author:   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * License:  MIT\n *\n * `npm install is-buffer`\n */\n\nmodule.exports = function (obj) {\n  return !!(obj != null &&\n    (obj._isBuffer || // For Safari 5-7 (missing Object.prototype.constructor)\n      (obj.constructor &&\n      typeof obj.constructor.isBuffer === 'function' &&\n      obj.constructor.isBuffer(obj))\n    ))\n}\n",
     "module.exports = Array.isArray || function (arr) {\n  return Object.prototype.toString.call(arr) == '[object Array]';\n};\n",
     "'use strict';\n\n\nvar yaml = require('./lib/js-yaml.js');\n\n\nmodule.exports = yaml;\n",
     "'use strict';\n\n\nvar loader = require('./js-yaml/loader');\nvar dumper = require('./js-yaml/dumper');\n\n\nfunction deprecated(name) {\n  return function () {\n    throw new Error('Function ' + name + ' is deprecated and cannot be used.');\n  };\n}\n\n\nmodule.exports.Type                = require('./js-yaml/type');\nmodule.exports.Schema              = require('./js-yaml/schema');\nmodule.exports.FAILSAFE_SCHEMA     = require('./js-yaml/schema/failsafe');\nmodule.exports.JSON_SCHEMA         = require('./js-yaml/schema/json');\nmodule.exports.CORE_SCHEMA         = require('./js-yaml/schema/core');\nmodule.exports.DEFAULT_SAFE_SCHEMA = require('./js-yaml/schema/default_safe');\nmodule.exports.DEFAULT_FULL_SCHEMA = require('./js-yaml/schema/default_full');\nmodule.exports.load                = loader.load;\nmodule.exports.loadAll             = loader.loadAll;\nmodule.exports.safeLoad            = loader.safeLoad;\nmodule.exports.safeLoadAll         = loader.safeLoadAll;\nmodule.exports.dump                = dumper.dump;\nmodule.exports.safeDump            = dumper.safeDump;\nmodule.exports.YAMLException       = require('./js-yaml/exception');\n\n// Deprecated schema names from JS-YAML 2.0.x\nmodule.exports.MINIMAL_SCHEMA = require('./js-yaml/schema/failsafe');\nmodule.exports.SAFE_SCHEMA    = require('./js-yaml/schema/default_safe');\nmodule.exports.DEFAULT_SCHEMA = require('./js-yaml/schema/default_full');\n\n// Deprecated functions from JS-YAML 1.x.x\nmodule.exports.scan           = deprecated('scan');\nmodule.exports.parse          = deprecated('parse');\nmodule.exports.compose        = deprecated('compose');\nmodule.exports.addConstructor = deprecated('addConstructor');\n",
     "'use strict';\n\n\nfunction isNothing(subject) {\n  return (typeof subject === 'undefined') || (null === subject);\n}\n\n\nfunction isObject(subject) {\n  return (typeof subject === 'object') && (null !== subject);\n}\n\n\nfunction toArray(sequence) {\n  if (Array.isArray(sequence)) {\n    return sequence;\n  } else if (isNothing(sequence)) {\n    return [];\n  }\n  return [ sequence ];\n}\n\n\nfunction extend(target, source) {\n  var index, length, key, sourceKeys;\n\n  if (source) {\n    sourceKeys = Object.keys(source);\n\n    for (index = 0, length = sourceKeys.length; index < length; index += 1) {\n      key = sourceKeys[index];\n      target[key] = source[key];\n    }\n  }\n\n  return target;\n}\n\n\nfunction repeat(string, count) {\n  var result = '', cycle;\n\n  for (cycle = 0; cycle < count; cycle += 1) {\n    result += string;\n  }\n\n  return result;\n}\n\n\nfunction isNegativeZero(number) {\n  return (0 === number) && (Number.NEGATIVE_INFINITY === 1 / number);\n}\n\n\nmodule.exports.isNothing      = isNothing;\nmodule.exports.isObject       = isObject;\nmodule.exports.toArray        = toArray;\nmodule.exports.repeat         = repeat;\nmodule.exports.isNegativeZero = isNegativeZero;\nmodule.exports.extend         = extend;\n",
-    "'use strict';\n\n/*eslint-disable no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\n\nvar _toString       = Object.prototype.toString;\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\nvar CHAR_TAB                  = 0x09; /* Tab */\nvar CHAR_LINE_FEED            = 0x0A; /* LF */\nvar CHAR_CARRIAGE_RETURN      = 0x0D; /* CR */\nvar CHAR_SPACE                = 0x20; /* Space */\nvar CHAR_EXCLAMATION          = 0x21; /* ! */\nvar CHAR_DOUBLE_QUOTE         = 0x22; /* \" */\nvar CHAR_SHARP                = 0x23; /* # */\nvar CHAR_PERCENT              = 0x25; /* % */\nvar CHAR_AMPERSAND            = 0x26; /* & */\nvar CHAR_SINGLE_QUOTE         = 0x27; /* ' */\nvar CHAR_ASTERISK             = 0x2A; /* * */\nvar CHAR_COMMA                = 0x2C; /* , */\nvar CHAR_MINUS                = 0x2D; /* - */\nvar CHAR_COLON                = 0x3A; /* : */\nvar CHAR_GREATER_THAN         = 0x3E; /* > */\nvar CHAR_QUESTION             = 0x3F; /* ? */\nvar CHAR_COMMERCIAL_AT        = 0x40; /* @ */\nvar CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */\nvar CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */\nvar CHAR_GRAVE_ACCENT         = 0x60; /* ` */\nvar CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */\nvar CHAR_VERTICAL_LINE        = 0x7C; /* | */\nvar CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */\n\nvar ESCAPE_SEQUENCES = {};\n\nESCAPE_SEQUENCES[0x00]   = '\\\\0';\nESCAPE_SEQUENCES[0x07]   = '\\\\a';\nESCAPE_SEQUENCES[0x08]   = '\\\\b';\nESCAPE_SEQUENCES[0x09]   = '\\\\t';\nESCAPE_SEQUENCES[0x0A]   = '\\\\n';\nESCAPE_SEQUENCES[0x0B]   = '\\\\v';\nESCAPE_SEQUENCES[0x0C]   = '\\\\f';\nESCAPE_SEQUENCES[0x0D]   = '\\\\r';\nESCAPE_SEQUENCES[0x1B]   = '\\\\e';\nESCAPE_SEQUENCES[0x22]   = '\\\\\"';\nESCAPE_SEQUENCES[0x5C]   = '\\\\\\\\';\nESCAPE_SEQUENCES[0x85]   = '\\\\N';\nESCAPE_SEQUENCES[0xA0]   = '\\\\_';\nESCAPE_SEQUENCES[0x2028] = '\\\\L';\nESCAPE_SEQUENCES[0x2029] = '\\\\P';\n\nvar DEPRECATED_BOOLEANS_SYNTAX = [\n  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',\n  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'\n];\n\nfunction compileStyleMap(schema, map) {\n  var result, keys, index, length, tag, style, type;\n\n  if (null === map) {\n    return {};\n  }\n\n  result = {};\n  keys = Object.keys(map);\n\n  for (index = 0, length = keys.length; index < length; index += 1) {\n    tag = keys[index];\n    style = String(map[tag]);\n\n    if ('!!' === tag.slice(0, 2)) {\n      tag = 'tag:yaml.org,2002:' + tag.slice(2);\n    }\n\n    type = schema.compiledTypeMap[tag];\n\n    if (type && _hasOwnProperty.call(type.styleAliases, style)) {\n      style = type.styleAliases[style];\n    }\n\n    result[tag] = style;\n  }\n\n  return result;\n}\n\nfunction encodeHex(character) {\n  var string, handle, length;\n\n  string = character.toString(16).toUpperCase();\n\n  if (character <= 0xFF) {\n    handle = 'x';\n    length = 2;\n  } else if (character <= 0xFFFF) {\n    handle = 'u';\n    length = 4;\n  } else if (character <= 0xFFFFFFFF) {\n    handle = 'U';\n    length = 8;\n  } else {\n    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');\n  }\n\n  return '\\\\' + handle + common.repeat('0', length - string.length) + string;\n}\n\nfunction State(options) {\n  this.schema      = options['schema'] || DEFAULT_FULL_SCHEMA;\n  this.indent      = Math.max(1, (options['indent'] || 2));\n  this.skipInvalid = options['skipInvalid'] || false;\n  this.flowLevel   = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);\n  this.styleMap    = compileStyleMap(this.schema, options['styles'] || null);\n  this.sortKeys    = options['sortKeys'] || false;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.explicitTypes = this.schema.compiledExplicit;\n\n  this.tag = null;\n  this.result = '';\n\n  this.duplicates = [];\n  this.usedDuplicates = null;\n}\n\nfunction indentString(string, spaces) {\n  var ind = common.repeat(' ', spaces),\n      position = 0,\n      next = -1,\n      result = '',\n      line,\n      length = string.length;\n\n  while (position < length) {\n    next = string.indexOf('\\n', position);\n    if (next === -1) {\n      line = string.slice(position);\n      position = length;\n    } else {\n      line = string.slice(position, next + 1);\n      position = next + 1;\n    }\n    if (line.length && line !== '\\n') {\n      result += ind;\n    }\n    result += line;\n  }\n\n  return result;\n}\n\nfunction generateNextLine(state, level) {\n  return '\\n' + common.repeat(' ', state.indent * level);\n}\n\nfunction testImplicitResolving(state, str) {\n  var index, length, type;\n\n  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {\n    type = state.implicitTypes[index];\n\n    if (type.resolve(str)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction StringBuilder(source) {\n  this.source = source;\n  this.result = '';\n  this.checkpoint = 0;\n}\n\nStringBuilder.prototype.takeUpTo = function (position) {\n  var er;\n\n  if (position < this.checkpoint) {\n    er = new Error('position should be > checkpoint');\n    er.position = position;\n    er.checkpoint = this.checkpoint;\n    throw er;\n  }\n\n  this.result += this.source.slice(this.checkpoint, position);\n  this.checkpoint = position;\n  return this;\n};\n\nStringBuilder.prototype.escapeChar = function () {\n  var character, esc;\n\n  character = this.source.charCodeAt(this.checkpoint);\n  esc = ESCAPE_SEQUENCES[character] || encodeHex(character);\n  this.result += esc;\n  this.checkpoint += 1;\n\n  return this;\n};\n\nStringBuilder.prototype.finish = function () {\n  if (this.source.length > this.checkpoint) {\n    this.takeUpTo(this.source.length);\n  }\n};\n\nfunction writeScalar(state, object, level, iskey) {\n  var simple, first, spaceWrap, folded, literal, single, double,\n      sawLineFeed, linePosition, longestLine, indent, max, character,\n      position, escapeSeq, hexEsc, previous, lineLength, modifier,\n      trailingLineBreaks, result;\n\n  if (0 === object.length) {\n    state.dump = \"''\";\n    return;\n  }\n\n  if (-1 !== DEPRECATED_BOOLEANS_SYNTAX.indexOf(object)) {\n    state.dump = \"'\" + object + \"'\";\n    return;\n  }\n\n  simple = true;\n  first = object.length ? object.charCodeAt(0) : 0;\n  spaceWrap = (CHAR_SPACE === first ||\n               CHAR_SPACE === object.charCodeAt(object.length - 1));\n\n  // Simplified check for restricted first characters\n  // http://www.yaml.org/spec/1.2/spec.html#ns-plain-first%28c%29\n  if (CHAR_MINUS         === first ||\n      CHAR_QUESTION      === first ||\n      CHAR_COMMERCIAL_AT === first ||\n      CHAR_GRAVE_ACCENT  === first) {\n    simple = false;\n  }\n\n  // can only use > and | if not wrapped in spaces or is not a key.\n  if (spaceWrap) {\n    simple = false;\n    folded = false;\n    literal = false;\n  } else {\n    folded = !iskey;\n    literal = !iskey;\n  }\n\n  single = true;\n  double = new StringBuilder(object);\n\n  sawLineFeed = false;\n  linePosition = 0;\n  longestLine = 0;\n\n  indent = state.indent * level;\n  max = 80;\n  if (indent < 40) {\n    max -= indent;\n  } else {\n    max = 40;\n  }\n\n  for (position = 0; position < object.length; position++) {\n    character = object.charCodeAt(position);\n    if (simple) {\n      // Characters that can never appear in the simple scalar\n      if (!simpleChar(character)) {\n        simple = false;\n      } else {\n        // Still simple.  If we make it all the way through like\n        // this, then we can just dump the string as-is.\n        continue;\n      }\n    }\n\n    if (single && character === CHAR_SINGLE_QUOTE) {\n      single = false;\n    }\n\n    escapeSeq = ESCAPE_SEQUENCES[character];\n    hexEsc = needsHexEscape(character);\n\n    if (!escapeSeq && !hexEsc) {\n      continue;\n    }\n\n    if (character !== CHAR_LINE_FEED &&\n        character !== CHAR_DOUBLE_QUOTE &&\n        character !== CHAR_SINGLE_QUOTE) {\n      folded = false;\n      literal = false;\n    } else if (character === CHAR_LINE_FEED) {\n      sawLineFeed = true;\n      single = false;\n      if (position > 0) {\n        previous = object.charCodeAt(position - 1);\n        if (previous === CHAR_SPACE) {\n          literal = false;\n          folded = false;\n        }\n      }\n      if (folded) {\n        lineLength = position - linePosition;\n        linePosition = position;\n        if (lineLength > longestLine) {\n          longestLine = lineLength;\n        }\n      }\n    }\n\n    if (character !== CHAR_DOUBLE_QUOTE) {\n      single = false;\n    }\n\n    double.takeUpTo(position);\n    double.escapeChar();\n  }\n\n  if (simple && testImplicitResolving(state, object)) {\n    simple = false;\n  }\n\n  modifier = '';\n  if (folded || literal) {\n    trailingLineBreaks = 0;\n    if (object.charCodeAt(object.length - 1) === CHAR_LINE_FEED) {\n      trailingLineBreaks += 1;\n      if (object.charCodeAt(object.length - 2) === CHAR_LINE_FEED) {\n        trailingLineBreaks += 1;\n      }\n    }\n\n    if (trailingLineBreaks === 0) {\n      modifier = '-';\n    } else if (trailingLineBreaks === 2) {\n      modifier = '+';\n    }\n  }\n\n  if (literal && longestLine < max) {\n    folded = false;\n  }\n\n  // If it's literally one line, then don't bother with the literal.\n  // We may still want to do a fold, though, if it's a super long line.\n  if (!sawLineFeed) {\n    literal = false;\n  }\n\n  if (simple) {\n    state.dump = object;\n  } else if (single) {\n    state.dump = '\\'' + object + '\\'';\n  } else if (folded) {\n    result = fold(object, max);\n    state.dump = '>' + modifier + '\\n' + indentString(result, indent);\n  } else if (literal) {\n    if (!modifier) {\n      object = object.replace(/\\n$/, '');\n    }\n    state.dump = '|' + modifier + '\\n' + indentString(object, indent);\n  } else if (double) {\n    double.finish();\n    state.dump = '\"' + double.result + '\"';\n  } else {\n    throw new Error('Failed to dump scalar value');\n  }\n\n  return;\n}\n\n// The `trailing` var is a regexp match of any trailing `\\n` characters.\n//\n// There are three cases we care about:\n//\n// 1. One trailing `\\n` on the string.  Just use `|` or `>`.\n//    This is the assumed default. (trailing = null)\n// 2. No trailing `\\n` on the string.  Use `|-` or `>-` to \"chomp\" the end.\n// 3. More than one trailing `\\n` on the string.  Use `|+` or `>+`.\n//\n// In the case of `>+`, these line breaks are *not* doubled (like the line\n// breaks within the string), so it's important to only end with the exact\n// same number as we started.\nfunction fold(object, max) {\n  var result = '',\n      position = 0,\n      length = object.length,\n      trailing = /\\n+$/.exec(object),\n      newLine;\n\n  if (trailing) {\n    length = trailing.index + 1;\n  }\n\n  while (position < length) {\n    newLine = object.indexOf('\\n', position);\n    if (newLine > length || newLine === -1) {\n      if (result) {\n        result += '\\n\\n';\n      }\n      result += foldLine(object.slice(position, length), max);\n      position = length;\n    } else {\n      if (result) {\n        result += '\\n\\n';\n      }\n      result += foldLine(object.slice(position, newLine), max);\n      position = newLine + 1;\n    }\n  }\n  if (trailing && trailing[0] !== '\\n') {\n    result += trailing[0];\n  }\n\n  return result;\n}\n\nfunction foldLine(line, max) {\n  if (line === '') {\n    return line;\n  }\n\n  var foldRe = /[^\\s] [^\\s]/g,\n      result = '',\n      prevMatch = 0,\n      foldStart = 0,\n      match = foldRe.exec(line),\n      index,\n      foldEnd,\n      folded;\n\n  while (match) {\n    index = match.index;\n\n    // when we cross the max len, if the previous match would've\n    // been ok, use that one, and carry on.  If there was no previous\n    // match on this fold section, then just have a long line.\n    if (index - foldStart > max) {\n      if (prevMatch !== foldStart) {\n        foldEnd = prevMatch;\n      } else {\n        foldEnd = index;\n      }\n\n      if (result) {\n        result += '\\n';\n      }\n      folded = line.slice(foldStart, foldEnd);\n      result += folded;\n      foldStart = foldEnd + 1;\n    }\n    prevMatch = index + 1;\n    match = foldRe.exec(line);\n  }\n\n  if (result) {\n    result += '\\n';\n  }\n\n  // if we end up with one last word at the end, then the last bit might\n  // be slightly bigger than we wanted, because we exited out of the loop.\n  if (foldStart !== prevMatch && line.length - foldStart > max) {\n    result += line.slice(foldStart, prevMatch) + '\\n' +\n              line.slice(prevMatch + 1);\n  } else {\n    result += line.slice(foldStart);\n  }\n\n  return result;\n}\n\n// Returns true if character can be found in a simple scalar\nfunction simpleChar(character) {\n  return CHAR_TAB                  !== character &&\n         CHAR_LINE_FEED            !== character &&\n         CHAR_CARRIAGE_RETURN      !== character &&\n         CHAR_COMMA                !== character &&\n         CHAR_LEFT_SQUARE_BRACKET  !== character &&\n         CHAR_RIGHT_SQUARE_BRACKET !== character &&\n         CHAR_LEFT_CURLY_BRACKET   !== character &&\n         CHAR_RIGHT_CURLY_BRACKET  !== character &&\n         CHAR_SHARP                !== character &&\n         CHAR_AMPERSAND            !== character &&\n         CHAR_ASTERISK             !== character &&\n         CHAR_EXCLAMATION          !== character &&\n         CHAR_VERTICAL_LINE        !== character &&\n         CHAR_GREATER_THAN         !== character &&\n         CHAR_SINGLE_QUOTE         !== character &&\n         CHAR_DOUBLE_QUOTE         !== character &&\n         CHAR_PERCENT              !== character &&\n         CHAR_COLON                !== character &&\n         !ESCAPE_SEQUENCES[character]            &&\n         !needsHexEscape(character);\n}\n\n// Returns true if the character code needs to be escaped.\nfunction needsHexEscape(character) {\n  return !((0x00020 <= character && character <= 0x00007E) ||\n           (0x00085 === character)                         ||\n           (0x000A0 <= character && character <= 0x00D7FF) ||\n           (0x0E000 <= character && character <= 0x00FFFD) ||\n           (0x10000 <= character && character <= 0x10FFFF));\n}\n\nfunction writeFlowSequence(state, level, object) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level, object[index], false, false)) {\n      if (0 !== index) {\n        _result += ', ';\n      }\n      _result += state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = '[' + _result + ']';\n}\n\nfunction writeBlockSequence(state, level, object, compact) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level + 1, object[index], true, true)) {\n      if (!compact || 0 !== index) {\n        _result += generateNextLine(state, level);\n      }\n      _result += '- ' + state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '[]'; // Empty sequence if no valid values.\n}\n\nfunction writeFlowMapping(state, level, object) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      pairBuffer;\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (0 !== index) {\n      pairBuffer += ', ';\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level, objectKey, false, false)) {\n      continue; // Skip this pair because of invalid key;\n    }\n\n    if (state.dump.length > 1024) {\n      pairBuffer += '? ';\n    }\n\n    pairBuffer += state.dump + ': ';\n\n    if (!writeNode(state, level, objectValue, false, false)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = '{' + _result + '}';\n}\n\nfunction writeBlockMapping(state, level, object, compact) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      explicitPair,\n      pairBuffer;\n\n  // Allow sorting keys so that the output file is deterministic\n  if (state.sortKeys === true) {\n    // Default sorting\n    objectKeyList.sort();\n  } else if (typeof state.sortKeys === 'function') {\n    // Custom sort function\n    objectKeyList.sort(state.sortKeys);\n  } else if (state.sortKeys) {\n    // Something is wrong\n    throw new YAMLException('sortKeys must be a boolean or a function');\n  }\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (!compact || 0 !== index) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level + 1, objectKey, true, true, true)) {\n      continue; // Skip this pair because of invalid key.\n    }\n\n    explicitPair = (null !== state.tag && '?' !== state.tag) ||\n                   (state.dump && state.dump.length > 1024);\n\n    if (explicitPair) {\n      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n        pairBuffer += '?';\n      } else {\n        pairBuffer += '? ';\n      }\n    }\n\n    pairBuffer += state.dump;\n\n    if (explicitPair) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n      pairBuffer += ':';\n    } else {\n      pairBuffer += ': ';\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '{}'; // Empty mapping if no valid pairs.\n}\n\nfunction detectType(state, object, explicit) {\n  var _result, typeList, index, length, type, style;\n\n  typeList = explicit ? state.explicitTypes : state.implicitTypes;\n\n  for (index = 0, length = typeList.length; index < length; index += 1) {\n    type = typeList[index];\n\n    if ((type.instanceOf  || type.predicate) &&\n        (!type.instanceOf || (('object' === typeof object) && (object instanceof type.instanceOf))) &&\n        (!type.predicate  || type.predicate(object))) {\n\n      state.tag = explicit ? type.tag : '?';\n\n      if (type.represent) {\n        style = state.styleMap[type.tag] || type.defaultStyle;\n\n        if ('[object Function]' === _toString.call(type.represent)) {\n          _result = type.represent(object, style);\n        } else if (_hasOwnProperty.call(type.represent, style)) {\n          _result = type.represent[style](object, style);\n        } else {\n          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not \"' + style + '\" style');\n        }\n\n        state.dump = _result;\n      }\n\n      return true;\n    }\n  }\n\n  return false;\n}\n\n// Serializes `object` and writes it to global `result`.\n// Returns true on success, or false on invalid object.\n//\nfunction writeNode(state, level, object, block, compact, iskey) {\n  state.tag = null;\n  state.dump = object;\n\n  if (!detectType(state, object, false)) {\n    detectType(state, object, true);\n  }\n\n  var type = _toString.call(state.dump);\n\n  if (block) {\n    block = (0 > state.flowLevel || state.flowLevel > level);\n  }\n\n  var objectOrArray = '[object Object]' === type || '[object Array]' === type,\n      duplicateIndex,\n      duplicate;\n\n  if (objectOrArray) {\n    duplicateIndex = state.duplicates.indexOf(object);\n    duplicate = duplicateIndex !== -1;\n  }\n\n  if ((null !== state.tag && '?' !== state.tag) || duplicate || (2 !== state.indent && level > 0)) {\n    compact = false;\n  }\n\n  if (duplicate && state.usedDuplicates[duplicateIndex]) {\n    state.dump = '*ref_' + duplicateIndex;\n  } else {\n    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {\n      state.usedDuplicates[duplicateIndex] = true;\n    }\n    if ('[object Object]' === type) {\n      if (block && (0 !== Object.keys(state.dump).length)) {\n        writeBlockMapping(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowMapping(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if ('[object Array]' === type) {\n      if (block && (0 !== state.dump.length)) {\n        writeBlockSequence(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowSequence(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if ('[object String]' === type) {\n      if ('?' !== state.tag) {\n        writeScalar(state, state.dump, level, iskey);\n      }\n    } else {\n      if (state.skipInvalid) {\n        return false;\n      }\n      throw new YAMLException('unacceptable kind of an object to dump ' + type);\n    }\n\n    if (null !== state.tag && '?' !== state.tag) {\n      state.dump = '!<' + state.tag + '> ' + state.dump;\n    }\n  }\n\n  return true;\n}\n\nfunction getDuplicateReferences(object, state) {\n  var objects = [],\n      duplicatesIndexes = [],\n      index,\n      length;\n\n  inspectNode(object, objects, duplicatesIndexes);\n\n  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {\n    state.duplicates.push(objects[duplicatesIndexes[index]]);\n  }\n  state.usedDuplicates = new Array(length);\n}\n\nfunction inspectNode(object, objects, duplicatesIndexes) {\n  var objectKeyList,\n      index,\n      length;\n\n  if (null !== object && 'object' === typeof object) {\n    index = objects.indexOf(object);\n    if (-1 !== index) {\n      if (-1 === duplicatesIndexes.indexOf(index)) {\n        duplicatesIndexes.push(index);\n      }\n    } else {\n      objects.push(object);\n\n      if (Array.isArray(object)) {\n        for (index = 0, length = object.length; index < length; index += 1) {\n          inspectNode(object[index], objects, duplicatesIndexes);\n        }\n      } else {\n        objectKeyList = Object.keys(object);\n\n        for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);\n        }\n      }\n    }\n  }\n}\n\nfunction dump(input, options) {\n  options = options || {};\n\n  var state = new State(options);\n\n  getDuplicateReferences(input, state);\n\n  if (writeNode(state, 0, input, true, true)) {\n    return state.dump + '\\n';\n  }\n  return '';\n}\n\nfunction safeDump(input, options) {\n  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\nmodule.exports.dump     = dump;\nmodule.exports.safeDump = safeDump;\n",
-    "// YAML error class. http://stackoverflow.com/questions/8458984\n//\n'use strict';\n\n\nvar inherits = require('util').inherits;\n\n\nfunction YAMLException(reason, mark) {\n  // Super constructor\n  Error.call(this);\n\n  // Include stack trace in error object\n  if (Error.captureStackTrace) {\n    // Chrome and NodeJS\n    Error.captureStackTrace(this, this.constructor);\n  } else {\n    // FF, IE 10+ and Safari 6+. Fallback for others\n    this.stack = (new Error()).stack || '';\n  }\n\n  this.name = 'YAMLException';\n  this.reason = reason;\n  this.mark = mark;\n  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');\n}\n\n\n// Inherit from Error\ninherits(YAMLException, Error);\n\n\nYAMLException.prototype.toString = function toString(compact) {\n  var result = this.name + ': ';\n\n  result += this.reason || '(unknown reason)';\n\n  if (!compact && this.mark) {\n    result += ' ' + this.mark.toString();\n  }\n\n  return result;\n};\n\n\nmodule.exports = YAMLException;\n",
-    "'use strict';\n\n/*eslint-disable max-len,no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar Mark                = require('./mark');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\n\n\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\n\nvar CONTEXT_FLOW_IN   = 1;\nvar CONTEXT_FLOW_OUT  = 2;\nvar CONTEXT_BLOCK_IN  = 3;\nvar CONTEXT_BLOCK_OUT = 4;\n\n\nvar CHOMPING_CLIP  = 1;\nvar CHOMPING_STRIP = 2;\nvar CHOMPING_KEEP  = 3;\n\n\nvar PATTERN_NON_PRINTABLE         = /[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F\\x7F-\\x84\\x86-\\x9F\\uFFFE\\uFFFF]|[\\uD800-\\uDBFF](?![\\uDC00-\\uDFFF])|(?:[^\\uD800-\\uDBFF]|^)[\\uDC00-\\uDFFF]/;\nvar PATTERN_NON_ASCII_LINE_BREAKS = /[\\x85\\u2028\\u2029]/;\nvar PATTERN_FLOW_INDICATORS       = /[,\\[\\]\\{\\}]/;\nvar PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\\-]+!)$/i;\nvar PATTERN_TAG_URI               = /^(?:!|[^,\\[\\]\\{\\}])(?:%[0-9a-f]{2}|[0-9a-z\\-#;\\/\\?:@&=\\+\\$,_\\.!~\\*'\\(\\)\\[\\]])*$/i;\n\n\nfunction is_EOL(c) {\n  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);\n}\n\nfunction is_WHITE_SPACE(c) {\n  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);\n}\n\nfunction is_WS_OR_EOL(c) {\n  return (c === 0x09/* Tab */) ||\n         (c === 0x20/* Space */) ||\n         (c === 0x0A/* LF */) ||\n         (c === 0x0D/* CR */);\n}\n\nfunction is_FLOW_INDICATOR(c) {\n  return 0x2C/* , */ === c ||\n         0x5B/* [ */ === c ||\n         0x5D/* ] */ === c ||\n         0x7B/* { */ === c ||\n         0x7D/* } */ === c;\n}\n\nfunction fromHexCode(c) {\n  var lc;\n\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  /*eslint-disable no-bitwise*/\n  lc = c | 0x20;\n\n  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {\n    return lc - 0x61 + 10;\n  }\n\n  return -1;\n}\n\nfunction escapedHexLen(c) {\n  if (c === 0x78/* x */) { return 2; }\n  if (c === 0x75/* u */) { return 4; }\n  if (c === 0x55/* U */) { return 8; }\n  return 0;\n}\n\nfunction fromDecimalCode(c) {\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  return -1;\n}\n\nfunction simpleEscapeSequence(c) {\n  return (c === 0x30/* 0 */) ? '\\x00' :\n        (c === 0x61/* a */) ? '\\x07' :\n        (c === 0x62/* b */) ? '\\x08' :\n        (c === 0x74/* t */) ? '\\x09' :\n        (c === 0x09/* Tab */) ? '\\x09' :\n        (c === 0x6E/* n */) ? '\\x0A' :\n        (c === 0x76/* v */) ? '\\x0B' :\n        (c === 0x66/* f */) ? '\\x0C' :\n        (c === 0x72/* r */) ? '\\x0D' :\n        (c === 0x65/* e */) ? '\\x1B' :\n        (c === 0x20/* Space */) ? ' ' :\n        (c === 0x22/* \" */) ? '\\x22' :\n        (c === 0x2F/* / */) ? '/' :\n        (c === 0x5C/* \\ */) ? '\\x5C' :\n        (c === 0x4E/* N */) ? '\\x85' :\n        (c === 0x5F/* _ */) ? '\\xA0' :\n        (c === 0x4C/* L */) ? '\\u2028' :\n        (c === 0x50/* P */) ? '\\u2029' : '';\n}\n\nfunction charFromCodepoint(c) {\n  if (c <= 0xFFFF) {\n    return String.fromCharCode(c);\n  }\n  // Encode UTF-16 surrogate pair\n  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF\n  return String.fromCharCode(((c - 0x010000) >> 10) + 0xD800,\n                             ((c - 0x010000) & 0x03FF) + 0xDC00);\n}\n\nvar simpleEscapeCheck = new Array(256); // integer, for fast access\nvar simpleEscapeMap = new Array(256);\nfor (var i = 0; i < 256; i++) {\n  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;\n  simpleEscapeMap[i] = simpleEscapeSequence(i);\n}\n\n\nfunction State(input, options) {\n  this.input = input;\n\n  this.filename  = options['filename']  || null;\n  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;\n  this.onWarning = options['onWarning'] || null;\n  this.legacy    = options['legacy']    || false;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.typeMap       = this.schema.compiledTypeMap;\n\n  this.length     = input.length;\n  this.position   = 0;\n  this.line       = 0;\n  this.lineStart  = 0;\n  this.lineIndent = 0;\n\n  this.documents = [];\n\n  /*\n  this.version;\n  this.checkLineBreaks;\n  this.tagMap;\n  this.anchorMap;\n  this.tag;\n  this.anchor;\n  this.kind;\n  this.result;*/\n\n}\n\n\nfunction generateError(state, message) {\n  return new YAMLException(\n    message,\n    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));\n}\n\nfunction throwError(state, message) {\n  throw generateError(state, message);\n}\n\nfunction throwWarning(state, message) {\n  if (state.onWarning) {\n    state.onWarning.call(null, generateError(state, message));\n  }\n}\n\n\nvar directiveHandlers = {\n\n  YAML: function handleYamlDirective(state, name, args) {\n\n      var match, major, minor;\n\n      if (null !== state.version) {\n        throwError(state, 'duplication of %YAML directive');\n      }\n\n      if (1 !== args.length) {\n        throwError(state, 'YAML directive accepts exactly one argument');\n      }\n\n      match = /^([0-9]+)\\.([0-9]+)$/.exec(args[0]);\n\n      if (null === match) {\n        throwError(state, 'ill-formed argument of the YAML directive');\n      }\n\n      major = parseInt(match[1], 10);\n      minor = parseInt(match[2], 10);\n\n      if (1 !== major) {\n        throwError(state, 'unacceptable YAML version of the document');\n      }\n\n      state.version = args[0];\n      state.checkLineBreaks = (minor < 2);\n\n      if (1 !== minor && 2 !== minor) {\n        throwWarning(state, 'unsupported YAML version of the document');\n      }\n    },\n\n  TAG: function handleTagDirective(state, name, args) {\n\n      var handle, prefix;\n\n      if (2 !== args.length) {\n        throwError(state, 'TAG directive accepts exactly two arguments');\n      }\n\n      handle = args[0];\n      prefix = args[1];\n\n      if (!PATTERN_TAG_HANDLE.test(handle)) {\n        throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');\n      }\n\n      if (_hasOwnProperty.call(state.tagMap, handle)) {\n        throwError(state, 'there is a previously declared suffix for \"' + handle + '\" tag handle');\n      }\n\n      if (!PATTERN_TAG_URI.test(prefix)) {\n        throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');\n      }\n\n      state.tagMap[handle] = prefix;\n    }\n};\n\n\nfunction captureSegment(state, start, end, checkJson) {\n  var _position, _length, _character, _result;\n\n  if (start < end) {\n    _result = state.input.slice(start, end);\n\n    if (checkJson) {\n      for (_position = 0, _length = _result.length;\n           _position < _length;\n           _position += 1) {\n        _character = _result.charCodeAt(_position);\n        if (!(0x09 === _character ||\n              0x20 <= _character && _character <= 0x10FFFF)) {\n          throwError(state, 'expected valid JSON character');\n        }\n      }\n    }\n\n    state.result += _result;\n  }\n}\n\nfunction mergeMappings(state, destination, source) {\n  var sourceKeys, key, index, quantity;\n\n  if (!common.isObject(source)) {\n    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');\n  }\n\n  sourceKeys = Object.keys(source);\n\n  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {\n    key = sourceKeys[index];\n\n    if (!_hasOwnProperty.call(destination, key)) {\n      destination[key] = source[key];\n    }\n  }\n}\n\nfunction storeMappingPair(state, _result, keyTag, keyNode, valueNode) {\n  var index, quantity;\n\n  keyNode = String(keyNode);\n\n  if (null === _result) {\n    _result = {};\n  }\n\n  if ('tag:yaml.org,2002:merge' === keyTag) {\n    if (Array.isArray(valueNode)) {\n      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {\n        mergeMappings(state, _result, valueNode[index]);\n      }\n    } else {\n      mergeMappings(state, _result, valueNode);\n    }\n  } else {\n    _result[keyNode] = valueNode;\n  }\n\n  return _result;\n}\n\nfunction readLineBreak(state) {\n  var ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x0A/* LF */ === ch) {\n    state.position++;\n  } else if (0x0D/* CR */ === ch) {\n    state.position++;\n    if (0x0A/* LF */ === state.input.charCodeAt(state.position)) {\n      state.position++;\n    }\n  } else {\n    throwError(state, 'a line break is expected');\n  }\n\n  state.line += 1;\n  state.lineStart = state.position;\n}\n\nfunction skipSeparationSpace(state, allowComments, checkIndent) {\n  var lineBreaks = 0,\n      ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n    while (is_WHITE_SPACE(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (allowComments && 0x23/* # */ === ch) {\n      do {\n        ch = state.input.charCodeAt(++state.position);\n      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && 0 !== ch);\n    }\n\n    if (is_EOL(ch)) {\n      readLineBreak(state);\n\n      ch = state.input.charCodeAt(state.position);\n      lineBreaks++;\n      state.lineIndent = 0;\n\n      while (0x20/* Space */ === ch) {\n        state.lineIndent++;\n        ch = state.input.charCodeAt(++state.position);\n      }\n    } else {\n      break;\n    }\n  }\n\n  if (-1 !== checkIndent && 0 !== lineBreaks && state.lineIndent < checkIndent) {\n    throwWarning(state, 'deficient indentation');\n  }\n\n  return lineBreaks;\n}\n\nfunction testDocumentSeparator(state) {\n  var _position = state.position,\n      ch;\n\n  ch = state.input.charCodeAt(_position);\n\n  // Condition state.position === state.lineStart is tested\n  // in parent on each call, for efficiency. No needs to test here again.\n  if ((0x2D/* - */ === ch || 0x2E/* . */ === ch) &&\n      state.input.charCodeAt(_position + 1) === ch &&\n      state.input.charCodeAt(_position + 2) === ch) {\n\n    _position += 3;\n\n    ch = state.input.charCodeAt(_position);\n\n    if (ch === 0 || is_WS_OR_EOL(ch)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction writeFoldedLines(state, count) {\n  if (1 === count) {\n    state.result += ' ';\n  } else if (count > 1) {\n    state.result += common.repeat('\\n', count - 1);\n  }\n}\n\n\nfunction readPlainScalar(state, nodeIndent, withinFlowCollection) {\n  var preceding,\n      following,\n      captureStart,\n      captureEnd,\n      hasPendingContent,\n      _line,\n      _lineStart,\n      _lineIndent,\n      _kind = state.kind,\n      _result = state.result,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (is_WS_OR_EOL(ch)             ||\n      is_FLOW_INDICATOR(ch)        ||\n      0x23/* # */           === ch ||\n      0x26/* & */           === ch ||\n      0x2A/* * */           === ch ||\n      0x21/* ! */           === ch ||\n      0x7C/* | */           === ch ||\n      0x3E/* > */           === ch ||\n      0x27/* ' */           === ch ||\n      0x22/* \" */           === ch ||\n      0x25/* % */           === ch ||\n      0x40/* @ */           === ch ||\n      0x60/* ` */           === ch) {\n    return false;\n  }\n\n  if (0x3F/* ? */ === ch || 0x2D/* - */ === ch) {\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (is_WS_OR_EOL(following) ||\n        withinFlowCollection && is_FLOW_INDICATOR(following)) {\n      return false;\n    }\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  captureStart = captureEnd = state.position;\n  hasPendingContent = false;\n\n  while (0 !== ch) {\n    if (0x3A/* : */ === ch) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following) ||\n          withinFlowCollection && is_FLOW_INDICATOR(following)) {\n        break;\n      }\n\n    } else if (0x23/* # */ === ch) {\n      preceding = state.input.charCodeAt(state.position - 1);\n\n      if (is_WS_OR_EOL(preceding)) {\n        break;\n      }\n\n    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||\n               withinFlowCollection && is_FLOW_INDICATOR(ch)) {\n      break;\n\n    } else if (is_EOL(ch)) {\n      _line = state.line;\n      _lineStart = state.lineStart;\n      _lineIndent = state.lineIndent;\n      skipSeparationSpace(state, false, -1);\n\n      if (state.lineIndent >= nodeIndent) {\n        hasPendingContent = true;\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      } else {\n        state.position = captureEnd;\n        state.line = _line;\n        state.lineStart = _lineStart;\n        state.lineIndent = _lineIndent;\n        break;\n      }\n    }\n\n    if (hasPendingContent) {\n      captureSegment(state, captureStart, captureEnd, false);\n      writeFoldedLines(state, state.line - _line);\n      captureStart = captureEnd = state.position;\n      hasPendingContent = false;\n    }\n\n    if (!is_WHITE_SPACE(ch)) {\n      captureEnd = state.position + 1;\n    }\n\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  captureSegment(state, captureStart, captureEnd, false);\n\n  if (state.result) {\n    return true;\n  }\n\n  state.kind = _kind;\n  state.result = _result;\n  return false;\n}\n\nfunction readSingleQuotedScalar(state, nodeIndent) {\n  var ch,\n      captureStart, captureEnd;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x27/* ' */ !== ch) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    if (0x27/* ' */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (0x27/* ' */ === ch) {\n        captureStart = captureEnd = state.position;\n        state.position++;\n      } else {\n        return true;\n      }\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a single quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a single quoted scalar');\n}\n\nfunction readDoubleQuotedScalar(state, nodeIndent) {\n  var captureStart,\n      captureEnd,\n      hexLength,\n      hexResult,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x22/* \" */ !== ch) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    if (0x22/* \" */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      state.position++;\n      return true;\n\n    } else if (0x5C/* \\ */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (is_EOL(ch)) {\n        skipSeparationSpace(state, false, nodeIndent);\n\n        // TODO: rework to inline fn with no type cast?\n      } else if (ch < 256 && simpleEscapeCheck[ch]) {\n        state.result += simpleEscapeMap[ch];\n        state.position++;\n\n      } else if ((tmp = escapedHexLen(ch)) > 0) {\n        hexLength = tmp;\n        hexResult = 0;\n\n        for (; hexLength > 0; hexLength--) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if ((tmp = fromHexCode(ch)) >= 0) {\n            hexResult = (hexResult << 4) + tmp;\n\n          } else {\n            throwError(state, 'expected hexadecimal character');\n          }\n        }\n\n        state.result += charFromCodepoint(hexResult);\n\n        state.position++;\n\n      } else {\n        throwError(state, 'unknown escape sequence');\n      }\n\n      captureStart = captureEnd = state.position;\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a double quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a double quoted scalar');\n}\n\nfunction readFlowCollection(state, nodeIndent) {\n  var readNext = true,\n      _line,\n      _tag     = state.tag,\n      _result,\n      _anchor  = state.anchor,\n      following,\n      terminator,\n      isPair,\n      isExplicitPair,\n      isMapping,\n      keyNode,\n      keyTag,\n      valueNode,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x5B/* [ */) {\n    terminator = 0x5D;/* ] */\n    isMapping = false;\n    _result = [];\n  } else if (ch === 0x7B/* { */) {\n    terminator = 0x7D;/* } */\n    isMapping = true;\n    _result = {};\n  } else {\n    return false;\n  }\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  while (0 !== ch) {\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (ch === terminator) {\n      state.position++;\n      state.tag = _tag;\n      state.anchor = _anchor;\n      state.kind = isMapping ? 'mapping' : 'sequence';\n      state.result = _result;\n      return true;\n    } else if (!readNext) {\n      throwError(state, 'missed comma between flow collection entries');\n    }\n\n    keyTag = keyNode = valueNode = null;\n    isPair = isExplicitPair = false;\n\n    if (0x3F/* ? */ === ch) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following)) {\n        isPair = isExplicitPair = true;\n        state.position++;\n        skipSeparationSpace(state, true, nodeIndent);\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n    keyTag = state.tag;\n    keyNode = state.result;\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((isExplicitPair || state.line === _line) && 0x3A/* : */ === ch) {\n      isPair = true;\n      ch = state.input.charCodeAt(++state.position);\n      skipSeparationSpace(state, true, nodeIndent);\n      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n      valueNode = state.result;\n    }\n\n    if (isMapping) {\n      storeMappingPair(state, _result, keyTag, keyNode, valueNode);\n    } else if (isPair) {\n      _result.push(storeMappingPair(state, null, keyTag, keyNode, valueNode));\n    } else {\n      _result.push(keyNode);\n    }\n\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (0x2C/* , */ === ch) {\n      readNext = true;\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      readNext = false;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a flow collection');\n}\n\nfunction readBlockScalar(state, nodeIndent) {\n  var captureStart,\n      folding,\n      chomping       = CHOMPING_CLIP,\n      detectedIndent = false,\n      textIndent     = nodeIndent,\n      emptyLines     = 0,\n      atMoreIndented = false,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x7C/* | */) {\n    folding = false;\n  } else if (ch === 0x3E/* > */) {\n    folding = true;\n  } else {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n\n  while (0 !== ch) {\n    ch = state.input.charCodeAt(++state.position);\n\n    if (0x2B/* + */ === ch || 0x2D/* - */ === ch) {\n      if (CHOMPING_CLIP === chomping) {\n        chomping = (0x2B/* + */ === ch) ? CHOMPING_KEEP : CHOMPING_STRIP;\n      } else {\n        throwError(state, 'repeat of a chomping mode identifier');\n      }\n\n    } else if ((tmp = fromDecimalCode(ch)) >= 0) {\n      if (tmp === 0) {\n        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');\n      } else if (!detectedIndent) {\n        textIndent = nodeIndent + tmp - 1;\n        detectedIndent = true;\n      } else {\n        throwError(state, 'repeat of an indentation width identifier');\n      }\n\n    } else {\n      break;\n    }\n  }\n\n  if (is_WHITE_SPACE(ch)) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (is_WHITE_SPACE(ch));\n\n    if (0x23/* # */ === ch) {\n      do { ch = state.input.charCodeAt(++state.position); }\n      while (!is_EOL(ch) && (0 !== ch));\n    }\n  }\n\n  while (0 !== ch) {\n    readLineBreak(state);\n    state.lineIndent = 0;\n\n    ch = state.input.charCodeAt(state.position);\n\n    while ((!detectedIndent || state.lineIndent < textIndent) &&\n           (0x20/* Space */ === ch)) {\n      state.lineIndent++;\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (!detectedIndent && state.lineIndent > textIndent) {\n      textIndent = state.lineIndent;\n    }\n\n    if (is_EOL(ch)) {\n      emptyLines++;\n      continue;\n    }\n\n    // End of the scalar.\n    if (state.lineIndent < textIndent) {\n\n      // Perform the chomping.\n      if (chomping === CHOMPING_KEEP) {\n        state.result += common.repeat('\\n', emptyLines);\n      } else if (chomping === CHOMPING_CLIP) {\n        if (detectedIndent) { // i.e. only if the scalar is not empty.\n          state.result += '\\n';\n        }\n      }\n\n      // Break this `while` cycle and go to the funciton's epilogue.\n      break;\n    }\n\n    // Folded style: use fancy rules to handle line breaks.\n    if (folding) {\n\n      // Lines starting with white space characters (more-indented lines) are not folded.\n      if (is_WHITE_SPACE(ch)) {\n        atMoreIndented = true;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // End of more-indented block.\n      } else if (atMoreIndented) {\n        atMoreIndented = false;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // Just one line break - perceive as the same line.\n      } else if (0 === emptyLines) {\n        if (detectedIndent) { // i.e. only if we have already read some scalar content.\n          state.result += ' ';\n        }\n\n      // Several line breaks - perceive as different lines.\n      } else {\n        state.result += common.repeat('\\n', emptyLines);\n      }\n\n    // Literal style: just add exact number of line breaks between content lines.\n    } else if (detectedIndent) {\n      // If current line isn't the first one - count line break from the last content line.\n      state.result += common.repeat('\\n', emptyLines + 1);\n    } else {\n      // In case of the first content line - count only empty lines.\n      state.result += common.repeat('\\n', emptyLines);\n    }\n\n    detectedIndent = true;\n    emptyLines = 0;\n    captureStart = state.position;\n\n    while (!is_EOL(ch) && (0 !== ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    captureSegment(state, captureStart, state.position, false);\n  }\n\n  return true;\n}\n\nfunction readBlockSequence(state, nodeIndent) {\n  var _line,\n      _tag      = state.tag,\n      _anchor   = state.anchor,\n      _result   = [],\n      following,\n      detected  = false,\n      ch;\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n\n    if (0x2D/* - */ !== ch) {\n      break;\n    }\n\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (!is_WS_OR_EOL(following)) {\n      break;\n    }\n\n    detected = true;\n    state.position++;\n\n    if (skipSeparationSpace(state, true, -1)) {\n      if (state.lineIndent <= nodeIndent) {\n        _result.push(null);\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);\n    _result.push(state.result);\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((state.line === _line || state.lineIndent > nodeIndent) && (0 !== ch)) {\n      throwError(state, 'bad indentation of a sequence entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'sequence';\n    state.result = _result;\n    return true;\n  }\n  return false;\n}\n\nfunction readBlockMapping(state, nodeIndent, flowIndent) {\n  var following,\n      allowCompact,\n      _line,\n      _tag          = state.tag,\n      _anchor       = state.anchor,\n      _result       = {},\n      keyTag        = null,\n      keyNode       = null,\n      valueNode     = null,\n      atExplicitKey = false,\n      detected      = false,\n      ch;\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n    following = state.input.charCodeAt(state.position + 1);\n    _line = state.line; // Save the current line.\n\n    //\n    // Explicit notation case. There are two separate blocks:\n    // first for the key (denoted by \"?\") and second for the value (denoted by \":\")\n    //\n    if ((0x3F/* ? */ === ch || 0x3A/* : */  === ch) && is_WS_OR_EOL(following)) {\n\n      if (0x3F/* ? */ === ch) {\n        if (atExplicitKey) {\n          storeMappingPair(state, _result, keyTag, keyNode, null);\n          keyTag = keyNode = valueNode = null;\n        }\n\n        detected = true;\n        atExplicitKey = true;\n        allowCompact = true;\n\n      } else if (atExplicitKey) {\n        // i.e. 0x3A/* : */ === character after the explicit key.\n        atExplicitKey = false;\n        allowCompact = true;\n\n      } else {\n        throwError(state, 'incomplete explicit mapping pair; a key node is missed');\n      }\n\n      state.position += 1;\n      ch = following;\n\n    //\n    // Implicit notation case. Flow-style node as the key first, then \":\", and the value.\n    //\n    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {\n\n      if (state.line === _line) {\n        ch = state.input.charCodeAt(state.position);\n\n        while (is_WHITE_SPACE(ch)) {\n          ch = state.input.charCodeAt(++state.position);\n        }\n\n        if (0x3A/* : */ === ch) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if (!is_WS_OR_EOL(ch)) {\n            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');\n          }\n\n          if (atExplicitKey) {\n            storeMappingPair(state, _result, keyTag, keyNode, null);\n            keyTag = keyNode = valueNode = null;\n          }\n\n          detected = true;\n          atExplicitKey = false;\n          allowCompact = false;\n          keyTag = state.tag;\n          keyNode = state.result;\n\n        } else if (detected) {\n          throwError(state, 'can not read an implicit mapping pair; a colon is missed');\n\n        } else {\n          state.tag = _tag;\n          state.anchor = _anchor;\n          return true; // Keep the result of `composeNode`.\n        }\n\n      } else if (detected) {\n        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');\n\n      } else {\n        state.tag = _tag;\n        state.anchor = _anchor;\n        return true; // Keep the result of `composeNode`.\n      }\n\n    } else {\n      break; // Reading is done. Go to the epilogue.\n    }\n\n    //\n    // Common reading code for both explicit and implicit notations.\n    //\n    if (state.line === _line || state.lineIndent > nodeIndent) {\n      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {\n        if (atExplicitKey) {\n          keyNode = state.result;\n        } else {\n          valueNode = state.result;\n        }\n      }\n\n      if (!atExplicitKey) {\n        storeMappingPair(state, _result, keyTag, keyNode, valueNode);\n        keyTag = keyNode = valueNode = null;\n      }\n\n      skipSeparationSpace(state, true, -1);\n      ch = state.input.charCodeAt(state.position);\n    }\n\n    if (state.lineIndent > nodeIndent && (0 !== ch)) {\n      throwError(state, 'bad indentation of a mapping entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  //\n  // Epilogue.\n  //\n\n  // Special case: last mapping's node contains only the key in explicit notation.\n  if (atExplicitKey) {\n    storeMappingPair(state, _result, keyTag, keyNode, null);\n  }\n\n  // Expose the resulting mapping.\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'mapping';\n    state.result = _result;\n  }\n\n  return detected;\n}\n\nfunction readTagProperty(state) {\n  var _position,\n      isVerbatim = false,\n      isNamed    = false,\n      tagHandle,\n      tagName,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x21/* ! */ !== ch) {\n    return false;\n  }\n\n  if (null !== state.tag) {\n    throwError(state, 'duplication of a tag property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  if (0x3C/* < */ === ch) {\n    isVerbatim = true;\n    ch = state.input.charCodeAt(++state.position);\n\n  } else if (0x21/* ! */ === ch) {\n    isNamed = true;\n    tagHandle = '!!';\n    ch = state.input.charCodeAt(++state.position);\n\n  } else {\n    tagHandle = '!';\n  }\n\n  _position = state.position;\n\n  if (isVerbatim) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (0 !== ch && 0x3E/* > */ !== ch);\n\n    if (state.position < state.length) {\n      tagName = state.input.slice(_position, state.position);\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      throwError(state, 'unexpected end of the stream within a verbatim tag');\n    }\n  } else {\n    while (0 !== ch && !is_WS_OR_EOL(ch)) {\n\n      if (0x21/* ! */ === ch) {\n        if (!isNamed) {\n          tagHandle = state.input.slice(_position - 1, state.position + 1);\n\n          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {\n            throwError(state, 'named tag handle cannot contain such characters');\n          }\n\n          isNamed = true;\n          _position = state.position + 1;\n        } else {\n          throwError(state, 'tag suffix cannot contain exclamation marks');\n        }\n      }\n\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    tagName = state.input.slice(_position, state.position);\n\n    if (PATTERN_FLOW_INDICATORS.test(tagName)) {\n      throwError(state, 'tag suffix cannot contain flow indicator characters');\n    }\n  }\n\n  if (tagName && !PATTERN_TAG_URI.test(tagName)) {\n    throwError(state, 'tag name cannot contain such characters: ' + tagName);\n  }\n\n  if (isVerbatim) {\n    state.tag = tagName;\n\n  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {\n    state.tag = state.tagMap[tagHandle] + tagName;\n\n  } else if ('!' === tagHandle) {\n    state.tag = '!' + tagName;\n\n  } else if ('!!' === tagHandle) {\n    state.tag = 'tag:yaml.org,2002:' + tagName;\n\n  } else {\n    throwError(state, 'undeclared tag handle \"' + tagHandle + '\"');\n  }\n\n  return true;\n}\n\nfunction readAnchorProperty(state) {\n  var _position,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x26/* & */ !== ch) {\n    return false;\n  }\n\n  if (null !== state.anchor) {\n    throwError(state, 'duplication of an anchor property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (0 !== ch && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an anchor node must contain at least one character');\n  }\n\n  state.anchor = state.input.slice(_position, state.position);\n  return true;\n}\n\nfunction readAlias(state) {\n  var _position, alias,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x2A/* * */ !== ch) {\n    return false;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (0 !== ch && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an alias node must contain at least one character');\n  }\n\n  alias = state.input.slice(_position, state.position);\n\n  if (!state.anchorMap.hasOwnProperty(alias)) {\n    throwError(state, 'unidentified alias \"' + alias + '\"');\n  }\n\n  state.result = state.anchorMap[alias];\n  skipSeparationSpace(state, true, -1);\n  return true;\n}\n\nfunction composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {\n  var allowBlockStyles,\n      allowBlockScalars,\n      allowBlockCollections,\n      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent\n      atNewLine  = false,\n      hasContent = false,\n      typeIndex,\n      typeQuantity,\n      type,\n      flowIndent,\n      blockIndent;\n\n  state.tag    = null;\n  state.anchor = null;\n  state.kind   = null;\n  state.result = null;\n\n  allowBlockStyles = allowBlockScalars = allowBlockCollections =\n    CONTEXT_BLOCK_OUT === nodeContext ||\n    CONTEXT_BLOCK_IN  === nodeContext;\n\n  if (allowToSeek) {\n    if (skipSeparationSpace(state, true, -1)) {\n      atNewLine = true;\n\n      if (state.lineIndent > parentIndent) {\n        indentStatus = 1;\n      } else if (state.lineIndent === parentIndent) {\n        indentStatus = 0;\n      } else if (state.lineIndent < parentIndent) {\n        indentStatus = -1;\n      }\n    }\n  }\n\n  if (1 === indentStatus) {\n    while (readTagProperty(state) || readAnchorProperty(state)) {\n      if (skipSeparationSpace(state, true, -1)) {\n        atNewLine = true;\n        allowBlockCollections = allowBlockStyles;\n\n        if (state.lineIndent > parentIndent) {\n          indentStatus = 1;\n        } else if (state.lineIndent === parentIndent) {\n          indentStatus = 0;\n        } else if (state.lineIndent < parentIndent) {\n          indentStatus = -1;\n        }\n      } else {\n        allowBlockCollections = false;\n      }\n    }\n  }\n\n  if (allowBlockCollections) {\n    allowBlockCollections = atNewLine || allowCompact;\n  }\n\n  if (1 === indentStatus || CONTEXT_BLOCK_OUT === nodeContext) {\n    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {\n      flowIndent = parentIndent;\n    } else {\n      flowIndent = parentIndent + 1;\n    }\n\n    blockIndent = state.position - state.lineStart;\n\n    if (1 === indentStatus) {\n      if (allowBlockCollections &&\n          (readBlockSequence(state, blockIndent) ||\n           readBlockMapping(state, blockIndent, flowIndent)) ||\n          readFlowCollection(state, flowIndent)) {\n        hasContent = true;\n      } else {\n        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||\n            readSingleQuotedScalar(state, flowIndent) ||\n            readDoubleQuotedScalar(state, flowIndent)) {\n          hasContent = true;\n\n        } else if (readAlias(state)) {\n          hasContent = true;\n\n          if (null !== state.tag || null !== state.anchor) {\n            throwError(state, 'alias node should not have any properties');\n          }\n\n        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {\n          hasContent = true;\n\n          if (null === state.tag) {\n            state.tag = '?';\n          }\n        }\n\n        if (null !== state.anchor) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else if (0 === indentStatus) {\n      // Special case: block sequences are allowed to have same indentation level as the parent.\n      // http://www.yaml.org/spec/1.2/spec.html#id2799784\n      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);\n    }\n  }\n\n  if (null !== state.tag && '!' !== state.tag) {\n    if ('?' === state.tag) {\n      for (typeIndex = 0, typeQuantity = state.implicitTypes.length;\n           typeIndex < typeQuantity;\n           typeIndex += 1) {\n        type = state.implicitTypes[typeIndex];\n\n        // Implicit resolving is not allowed for non-scalar types, and '?'\n        // non-specific tag is only assigned to plain scalars. So, it isn't\n        // needed to check for 'kind' conformity.\n\n        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched\n          state.result = type.construct(state.result);\n          state.tag = type.tag;\n          if (null !== state.anchor) {\n            state.anchorMap[state.anchor] = state.result;\n          }\n          break;\n        }\n      }\n    } else if (_hasOwnProperty.call(state.typeMap, state.tag)) {\n      type = state.typeMap[state.tag];\n\n      if (null !== state.result && type.kind !== state.kind) {\n        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be \"' + type.kind + '\", not \"' + state.kind + '\"');\n      }\n\n      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched\n        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');\n      } else {\n        state.result = type.construct(state.result);\n        if (null !== state.anchor) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else {\n      throwError(state, 'unknown tag !<' + state.tag + '>');\n    }\n  }\n\n  return null !== state.tag || null !== state.anchor || hasContent;\n}\n\nfunction readDocument(state) {\n  var documentStart = state.position,\n      _position,\n      directiveName,\n      directiveArgs,\n      hasDirectives = false,\n      ch;\n\n  state.version = null;\n  state.checkLineBreaks = state.legacy;\n  state.tagMap = {};\n  state.anchorMap = {};\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (state.lineIndent > 0 || 0x25/* % */ !== ch) {\n      break;\n    }\n\n    hasDirectives = true;\n    ch = state.input.charCodeAt(++state.position);\n    _position = state.position;\n\n    while (0 !== ch && !is_WS_OR_EOL(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    directiveName = state.input.slice(_position, state.position);\n    directiveArgs = [];\n\n    if (directiveName.length < 1) {\n      throwError(state, 'directive name must not be less than one character in length');\n    }\n\n    while (0 !== ch) {\n      while (is_WHITE_SPACE(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      if (0x23/* # */ === ch) {\n        do { ch = state.input.charCodeAt(++state.position); }\n        while (0 !== ch && !is_EOL(ch));\n        break;\n      }\n\n      if (is_EOL(ch)) {\n        break;\n      }\n\n      _position = state.position;\n\n      while (0 !== ch && !is_WS_OR_EOL(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      directiveArgs.push(state.input.slice(_position, state.position));\n    }\n\n    if (0 !== ch) {\n      readLineBreak(state);\n    }\n\n    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {\n      directiveHandlers[directiveName](state, directiveName, directiveArgs);\n    } else {\n      throwWarning(state, 'unknown document directive \"' + directiveName + '\"');\n    }\n  }\n\n  skipSeparationSpace(state, true, -1);\n\n  if (0 === state.lineIndent &&\n      0x2D/* - */ === state.input.charCodeAt(state.position) &&\n      0x2D/* - */ === state.input.charCodeAt(state.position + 1) &&\n      0x2D/* - */ === state.input.charCodeAt(state.position + 2)) {\n    state.position += 3;\n    skipSeparationSpace(state, true, -1);\n\n  } else if (hasDirectives) {\n    throwError(state, 'directives end mark is expected');\n  }\n\n  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);\n  skipSeparationSpace(state, true, -1);\n\n  if (state.checkLineBreaks &&\n      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {\n    throwWarning(state, 'non-ASCII line breaks are interpreted as content');\n  }\n\n  state.documents.push(state.result);\n\n  if (state.position === state.lineStart && testDocumentSeparator(state)) {\n\n    if (0x2E/* . */ === state.input.charCodeAt(state.position)) {\n      state.position += 3;\n      skipSeparationSpace(state, true, -1);\n    }\n    return;\n  }\n\n  if (state.position < (state.length - 1)) {\n    throwError(state, 'end of the stream or a document separator is expected');\n  } else {\n    return;\n  }\n}\n\n\nfunction loadDocuments(input, options) {\n  input = String(input);\n  options = options || {};\n\n  if (input.length !== 0) {\n\n    // Add tailing `\\n` if not exists\n    if (0x0A/* LF */ !== input.charCodeAt(input.length - 1) &&\n        0x0D/* CR */ !== input.charCodeAt(input.length - 1)) {\n      input += '\\n';\n    }\n\n    // Strip BOM\n    if (input.charCodeAt(0) === 0xFEFF) {\n      input = input.slice(1);\n    }\n  }\n\n  var state = new State(input, options);\n\n  if (PATTERN_NON_PRINTABLE.test(state.input)) {\n    throwError(state, 'the stream contains non-printable characters');\n  }\n\n  // Use 0 as string terminator. That significantly simplifies bounds check.\n  state.input += '\\0';\n\n  while (0x20/* Space */ === state.input.charCodeAt(state.position)) {\n    state.lineIndent += 1;\n    state.position += 1;\n  }\n\n  while (state.position < (state.length - 1)) {\n    readDocument(state);\n  }\n\n  return state.documents;\n}\n\n\nfunction loadAll(input, iterator, options) {\n  var documents = loadDocuments(input, options), index, length;\n\n  for (index = 0, length = documents.length; index < length; index += 1) {\n    iterator(documents[index]);\n  }\n}\n\n\nfunction load(input, options) {\n  var documents = loadDocuments(input, options);\n\n  if (0 === documents.length) {\n    /*eslint-disable no-undefined*/\n    return undefined;\n  } else if (1 === documents.length) {\n    return documents[0];\n  }\n  throw new YAMLException('expected a single document in the stream, but found more');\n}\n\n\nfunction safeLoadAll(input, output, options) {\n  loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nfunction safeLoad(input, options) {\n  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nmodule.exports.loadAll     = loadAll;\nmodule.exports.load        = load;\nmodule.exports.safeLoadAll = safeLoadAll;\nmodule.exports.safeLoad    = safeLoad;\n",
+    "'use strict';\n\n/*eslint-disable no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\n\nvar _toString       = Object.prototype.toString;\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\nvar CHAR_TAB                  = 0x09; /* Tab */\nvar CHAR_LINE_FEED            = 0x0A; /* LF */\nvar CHAR_CARRIAGE_RETURN      = 0x0D; /* CR */\nvar CHAR_SPACE                = 0x20; /* Space */\nvar CHAR_EXCLAMATION          = 0x21; /* ! */\nvar CHAR_DOUBLE_QUOTE         = 0x22; /* \" */\nvar CHAR_SHARP                = 0x23; /* # */\nvar CHAR_PERCENT              = 0x25; /* % */\nvar CHAR_AMPERSAND            = 0x26; /* & */\nvar CHAR_SINGLE_QUOTE         = 0x27; /* ' */\nvar CHAR_ASTERISK             = 0x2A; /* * */\nvar CHAR_COMMA                = 0x2C; /* , */\nvar CHAR_MINUS                = 0x2D; /* - */\nvar CHAR_COLON                = 0x3A; /* : */\nvar CHAR_GREATER_THAN         = 0x3E; /* > */\nvar CHAR_QUESTION             = 0x3F; /* ? */\nvar CHAR_COMMERCIAL_AT        = 0x40; /* @ */\nvar CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */\nvar CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */\nvar CHAR_GRAVE_ACCENT         = 0x60; /* ` */\nvar CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */\nvar CHAR_VERTICAL_LINE        = 0x7C; /* | */\nvar CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */\n\nvar ESCAPE_SEQUENCES = {};\n\nESCAPE_SEQUENCES[0x00]   = '\\\\0';\nESCAPE_SEQUENCES[0x07]   = '\\\\a';\nESCAPE_SEQUENCES[0x08]   = '\\\\b';\nESCAPE_SEQUENCES[0x09]   = '\\\\t';\nESCAPE_SEQUENCES[0x0A]   = '\\\\n';\nESCAPE_SEQUENCES[0x0B]   = '\\\\v';\nESCAPE_SEQUENCES[0x0C]   = '\\\\f';\nESCAPE_SEQUENCES[0x0D]   = '\\\\r';\nESCAPE_SEQUENCES[0x1B]   = '\\\\e';\nESCAPE_SEQUENCES[0x22]   = '\\\\\"';\nESCAPE_SEQUENCES[0x5C]   = '\\\\\\\\';\nESCAPE_SEQUENCES[0x85]   = '\\\\N';\nESCAPE_SEQUENCES[0xA0]   = '\\\\_';\nESCAPE_SEQUENCES[0x2028] = '\\\\L';\nESCAPE_SEQUENCES[0x2029] = '\\\\P';\n\nvar DEPRECATED_BOOLEANS_SYNTAX = [\n  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',\n  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'\n];\n\nfunction compileStyleMap(schema, map) {\n  var result, keys, index, length, tag, style, type;\n\n  if (null === map) {\n    return {};\n  }\n\n  result = {};\n  keys = Object.keys(map);\n\n  for (index = 0, length = keys.length; index < length; index += 1) {\n    tag = keys[index];\n    style = String(map[tag]);\n\n    if ('!!' === tag.slice(0, 2)) {\n      tag = 'tag:yaml.org,2002:' + tag.slice(2);\n    }\n\n    type = schema.compiledTypeMap[tag];\n\n    if (type && _hasOwnProperty.call(type.styleAliases, style)) {\n      style = type.styleAliases[style];\n    }\n\n    result[tag] = style;\n  }\n\n  return result;\n}\n\nfunction encodeHex(character) {\n  var string, handle, length;\n\n  string = character.toString(16).toUpperCase();\n\n  if (character <= 0xFF) {\n    handle = 'x';\n    length = 2;\n  } else if (character <= 0xFFFF) {\n    handle = 'u';\n    length = 4;\n  } else if (character <= 0xFFFFFFFF) {\n    handle = 'U';\n    length = 8;\n  } else {\n    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');\n  }\n\n  return '\\\\' + handle + common.repeat('0', length - string.length) + string;\n}\n\nfunction State(options) {\n  this.schema      = options['schema'] || DEFAULT_FULL_SCHEMA;\n  this.indent      = Math.max(1, (options['indent'] || 2));\n  this.skipInvalid = options['skipInvalid'] || false;\n  this.flowLevel   = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);\n  this.styleMap    = compileStyleMap(this.schema, options['styles'] || null);\n  this.sortKeys    = options['sortKeys'] || false;\n  this.lineWidth    = options['lineWidth'] || 80;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.explicitTypes = this.schema.compiledExplicit;\n\n  this.tag = null;\n  this.result = '';\n\n  this.duplicates = [];\n  this.usedDuplicates = null;\n}\n\nfunction indentString(string, spaces) {\n  var ind = common.repeat(' ', spaces),\n      position = 0,\n      next = -1,\n      result = '',\n      line,\n      length = string.length;\n\n  while (position < length) {\n    next = string.indexOf('\\n', position);\n    if (next === -1) {\n      line = string.slice(position);\n      position = length;\n    } else {\n      line = string.slice(position, next + 1);\n      position = next + 1;\n    }\n    if (line.length && line !== '\\n') {\n      result += ind;\n    }\n    result += line;\n  }\n\n  return result;\n}\n\nfunction generateNextLine(state, level) {\n  return '\\n' + common.repeat(' ', state.indent * level);\n}\n\nfunction testImplicitResolving(state, str) {\n  var index, length, type;\n\n  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {\n    type = state.implicitTypes[index];\n\n    if (type.resolve(str)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction StringBuilder(source) {\n  this.source = source;\n  this.result = '';\n  this.checkpoint = 0;\n}\n\nStringBuilder.prototype.takeUpTo = function (position) {\n  var er;\n\n  if (position < this.checkpoint) {\n    er = new Error('position should be > checkpoint');\n    er.position = position;\n    er.checkpoint = this.checkpoint;\n    throw er;\n  }\n\n  this.result += this.source.slice(this.checkpoint, position);\n  this.checkpoint = position;\n  return this;\n};\n\nStringBuilder.prototype.escapeChar = function () {\n  var character, esc;\n\n  character = this.source.charCodeAt(this.checkpoint);\n  esc = ESCAPE_SEQUENCES[character] || encodeHex(character);\n  this.result += esc;\n  this.checkpoint += 1;\n\n  return this;\n};\n\nStringBuilder.prototype.finish = function () {\n  if (this.source.length > this.checkpoint) {\n    this.takeUpTo(this.source.length);\n  }\n};\n\nfunction writeScalar(state, object, level, iskey) {\n  var simple, first, spaceWrap, folded, literal, single, double,\n      sawLineFeed, linePosition, longestLine, indent, max, character,\n      position, escapeSeq, hexEsc, previous, lineLength, modifier,\n      trailingLineBreaks, result;\n\n  if (0 === object.length) {\n    state.dump = \"''\";\n    return;\n  }\n\n  if (-1 !== DEPRECATED_BOOLEANS_SYNTAX.indexOf(object)) {\n    state.dump = \"'\" + object + \"'\";\n    return;\n  }\n\n  simple = true;\n  first = object.length ? object.charCodeAt(0) : 0;\n  spaceWrap = (CHAR_SPACE === first ||\n               CHAR_SPACE === object.charCodeAt(object.length - 1));\n\n  // Simplified check for restricted first characters\n  // http://www.yaml.org/spec/1.2/spec.html#ns-plain-first%28c%29\n  if (CHAR_MINUS         === first ||\n      CHAR_QUESTION      === first ||\n      CHAR_COMMERCIAL_AT === first ||\n      CHAR_GRAVE_ACCENT  === first) {\n    simple = false;\n  }\n\n  // can only use > and | if not wrapped in spaces or is not a key.\n  if (spaceWrap) {\n    simple = false;\n    folded = false;\n    literal = false;\n  } else {\n    folded = !iskey;\n    literal = !iskey;\n  }\n\n  single = true;\n  double = new StringBuilder(object);\n\n  sawLineFeed = false;\n  linePosition = 0;\n  longestLine = 0;\n\n  indent = state.indent * level;\n  max = state.lineWidth;\n  if (max === -1) {\n    // Replace -1 with biggest ingeger number according to\n    // http://ecma262-5.com/ELS5_HTML.htm#Section_8.5\n    max = 9007199254740991;\n  }\n\n  if (indent < 40) {\n    max -= indent;\n  } else {\n    max = 40;\n  }\n\n  for (position = 0; position < object.length; position++) {\n    character = object.charCodeAt(position);\n    if (simple) {\n      // Characters that can never appear in the simple scalar\n      if (!simpleChar(character)) {\n        simple = false;\n      } else {\n        // Still simple.  If we make it all the way through like\n        // this, then we can just dump the string as-is.\n        continue;\n      }\n    }\n\n    if (single && character === CHAR_SINGLE_QUOTE) {\n      single = false;\n    }\n\n    escapeSeq = ESCAPE_SEQUENCES[character];\n    hexEsc = needsHexEscape(character);\n\n    if (!escapeSeq && !hexEsc) {\n      continue;\n    }\n\n    if (character !== CHAR_LINE_FEED &&\n        character !== CHAR_DOUBLE_QUOTE &&\n        character !== CHAR_SINGLE_QUOTE) {\n      folded = false;\n      literal = false;\n    } else if (character === CHAR_LINE_FEED) {\n      sawLineFeed = true;\n      single = false;\n      if (position > 0) {\n        previous = object.charCodeAt(position - 1);\n        if (previous === CHAR_SPACE) {\n          literal = false;\n          folded = false;\n        }\n      }\n      if (folded) {\n        lineLength = position - linePosition;\n        linePosition = position;\n        if (lineLength > longestLine) {\n          longestLine = lineLength;\n        }\n      }\n    }\n\n    if (character !== CHAR_DOUBLE_QUOTE) {\n      single = false;\n    }\n\n    double.takeUpTo(position);\n    double.escapeChar();\n  }\n\n  if (simple && testImplicitResolving(state, object)) {\n    simple = false;\n  }\n\n  modifier = '';\n  if (folded || literal) {\n    trailingLineBreaks = 0;\n    if (object.charCodeAt(object.length - 1) === CHAR_LINE_FEED) {\n      trailingLineBreaks += 1;\n      if (object.charCodeAt(object.length - 2) === CHAR_LINE_FEED) {\n        trailingLineBreaks += 1;\n      }\n    }\n\n    if (trailingLineBreaks === 0) {\n      modifier = '-';\n    } else if (trailingLineBreaks === 2) {\n      modifier = '+';\n    }\n  }\n\n  if (literal && longestLine < max) {\n    folded = false;\n  }\n\n  // If it's literally one line, then don't bother with the literal.\n  // We may still want to do a fold, though, if it's a super long line.\n  if (!sawLineFeed) {\n    literal = false;\n  }\n\n  if (simple) {\n    state.dump = object;\n  } else if (single) {\n    state.dump = '\\'' + object + '\\'';\n  } else if (folded) {\n    result = fold(object, max);\n    state.dump = '>' + modifier + '\\n' + indentString(result, indent);\n  } else if (literal) {\n    if (!modifier) {\n      object = object.replace(/\\n$/, '');\n    }\n    state.dump = '|' + modifier + '\\n' + indentString(object, indent);\n  } else if (double) {\n    double.finish();\n    state.dump = '\"' + double.result + '\"';\n  } else {\n    throw new Error('Failed to dump scalar value');\n  }\n\n  return;\n}\n\n// The `trailing` var is a regexp match of any trailing `\\n` characters.\n//\n// There are three cases we care about:\n//\n// 1. One trailing `\\n` on the string.  Just use `|` or `>`.\n//    This is the assumed default. (trailing = null)\n// 2. No trailing `\\n` on the string.  Use `|-` or `>-` to \"chomp\" the end.\n// 3. More than one trailing `\\n` on the string.  Use `|+` or `>+`.\n//\n// In the case of `>+`, these line breaks are *not* doubled (like the line\n// breaks within the string), so it's important to only end with the exact\n// same number as we started.\nfunction fold(object, max) {\n  var result = '',\n      position = 0,\n      length = object.length,\n      trailing = /\\n+$/.exec(object),\n      newLine;\n\n  if (trailing) {\n    length = trailing.index + 1;\n  }\n\n  while (position < length) {\n    newLine = object.indexOf('\\n', position);\n    if (newLine > length || newLine === -1) {\n      if (result) {\n        result += '\\n\\n';\n      }\n      result += foldLine(object.slice(position, length), max);\n      position = length;\n    } else {\n      if (result) {\n        result += '\\n\\n';\n      }\n      result += foldLine(object.slice(position, newLine), max);\n      position = newLine + 1;\n    }\n  }\n  if (trailing && trailing[0] !== '\\n') {\n    result += trailing[0];\n  }\n\n  return result;\n}\n\nfunction foldLine(line, max) {\n  if (line === '') {\n    return line;\n  }\n\n  var foldRe = /[^\\s] [^\\s]/g,\n      result = '',\n      prevMatch = 0,\n      foldStart = 0,\n      match = foldRe.exec(line),\n      index,\n      foldEnd,\n      folded;\n\n  while (match) {\n    index = match.index;\n\n    // when we cross the max len, if the previous match would've\n    // been ok, use that one, and carry on.  If there was no previous\n    // match on this fold section, then just have a long line.\n    if (index - foldStart > max) {\n      if (prevMatch !== foldStart) {\n        foldEnd = prevMatch;\n      } else {\n        foldEnd = index;\n      }\n\n      if (result) {\n        result += '\\n';\n      }\n      folded = line.slice(foldStart, foldEnd);\n      result += folded;\n      foldStart = foldEnd + 1;\n    }\n    prevMatch = index + 1;\n    match = foldRe.exec(line);\n  }\n\n  if (result) {\n    result += '\\n';\n  }\n\n  // if we end up with one last word at the end, then the last bit might\n  // be slightly bigger than we wanted, because we exited out of the loop.\n  if (foldStart !== prevMatch && line.length - foldStart > max) {\n    result += line.slice(foldStart, prevMatch) + '\\n' +\n              line.slice(prevMatch + 1);\n  } else {\n    result += line.slice(foldStart);\n  }\n\n  return result;\n}\n\n// Returns true if character can be found in a simple scalar\nfunction simpleChar(character) {\n  return CHAR_TAB                  !== character &&\n         CHAR_LINE_FEED            !== character &&\n         CHAR_CARRIAGE_RETURN      !== character &&\n         CHAR_COMMA                !== character &&\n         CHAR_LEFT_SQUARE_BRACKET  !== character &&\n         CHAR_RIGHT_SQUARE_BRACKET !== character &&\n         CHAR_LEFT_CURLY_BRACKET   !== character &&\n         CHAR_RIGHT_CURLY_BRACKET  !== character &&\n         CHAR_SHARP                !== character &&\n         CHAR_AMPERSAND            !== character &&\n         CHAR_ASTERISK             !== character &&\n         CHAR_EXCLAMATION          !== character &&\n         CHAR_VERTICAL_LINE        !== character &&\n         CHAR_GREATER_THAN         !== character &&\n         CHAR_SINGLE_QUOTE         !== character &&\n         CHAR_DOUBLE_QUOTE         !== character &&\n         CHAR_PERCENT              !== character &&\n         CHAR_COLON                !== character &&\n         !ESCAPE_SEQUENCES[character]            &&\n         !needsHexEscape(character);\n}\n\n// Returns true if the character code needs to be escaped.\nfunction needsHexEscape(character) {\n  return !((0x00020 <= character && character <= 0x00007E) ||\n           (0x00085 === character)                         ||\n           (0x000A0 <= character && character <= 0x00D7FF) ||\n           (0x0E000 <= character && character <= 0x00FFFD) ||\n           (0x10000 <= character && character <= 0x10FFFF));\n}\n\nfunction writeFlowSequence(state, level, object) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level, object[index], false, false)) {\n      if (0 !== index) {\n        _result += ', ';\n      }\n      _result += state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = '[' + _result + ']';\n}\n\nfunction writeBlockSequence(state, level, object, compact) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level + 1, object[index], true, true)) {\n      if (!compact || 0 !== index) {\n        _result += generateNextLine(state, level);\n      }\n      _result += '- ' + state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '[]'; // Empty sequence if no valid values.\n}\n\nfunction writeFlowMapping(state, level, object) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      pairBuffer;\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (0 !== index) {\n      pairBuffer += ', ';\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level, objectKey, false, false)) {\n      continue; // Skip this pair because of invalid key;\n    }\n\n    if (state.dump.length > 1024) {\n      pairBuffer += '? ';\n    }\n\n    pairBuffer += state.dump + ': ';\n\n    if (!writeNode(state, level, objectValue, false, false)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = '{' + _result + '}';\n}\n\nfunction writeBlockMapping(state, level, object, compact) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      explicitPair,\n      pairBuffer;\n\n  // Allow sorting keys so that the output file is deterministic\n  if (state.sortKeys === true) {\n    // Default sorting\n    objectKeyList.sort();\n  } else if (typeof state.sortKeys === 'function') {\n    // Custom sort function\n    objectKeyList.sort(state.sortKeys);\n  } else if (state.sortKeys) {\n    // Something is wrong\n    throw new YAMLException('sortKeys must be a boolean or a function');\n  }\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (!compact || 0 !== index) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level + 1, objectKey, true, true, true)) {\n      continue; // Skip this pair because of invalid key.\n    }\n\n    explicitPair = (null !== state.tag && '?' !== state.tag) ||\n                   (state.dump && state.dump.length > 1024);\n\n    if (explicitPair) {\n      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n        pairBuffer += '?';\n      } else {\n        pairBuffer += '? ';\n      }\n    }\n\n    pairBuffer += state.dump;\n\n    if (explicitPair) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n      pairBuffer += ':';\n    } else {\n      pairBuffer += ': ';\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '{}'; // Empty mapping if no valid pairs.\n}\n\nfunction detectType(state, object, explicit) {\n  var _result, typeList, index, length, type, style;\n\n  typeList = explicit ? state.explicitTypes : state.implicitTypes;\n\n  for (index = 0, length = typeList.length; index < length; index += 1) {\n    type = typeList[index];\n\n    if ((type.instanceOf  || type.predicate) &&\n        (!type.instanceOf || (('object' === typeof object) && (object instanceof type.instanceOf))) &&\n        (!type.predicate  || type.predicate(object))) {\n\n      state.tag = explicit ? type.tag : '?';\n\n      if (type.represent) {\n        style = state.styleMap[type.tag] || type.defaultStyle;\n\n        if ('[object Function]' === _toString.call(type.represent)) {\n          _result = type.represent(object, style);\n        } else if (_hasOwnProperty.call(type.represent, style)) {\n          _result = type.represent[style](object, style);\n        } else {\n          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not \"' + style + '\" style');\n        }\n\n        state.dump = _result;\n      }\n\n      return true;\n    }\n  }\n\n  return false;\n}\n\n// Serializes `object` and writes it to global `result`.\n// Returns true on success, or false on invalid object.\n//\nfunction writeNode(state, level, object, block, compact, iskey) {\n  state.tag = null;\n  state.dump = object;\n\n  if (!detectType(state, object, false)) {\n    detectType(state, object, true);\n  }\n\n  var type = _toString.call(state.dump);\n\n  if (block) {\n    block = (0 > state.flowLevel || state.flowLevel > level);\n  }\n\n  var objectOrArray = '[object Object]' === type || '[object Array]' === type,\n      duplicateIndex,\n      duplicate;\n\n  if (objectOrArray) {\n    duplicateIndex = state.duplicates.indexOf(object);\n    duplicate = duplicateIndex !== -1;\n  }\n\n  if ((null !== state.tag && '?' !== state.tag) || duplicate || (2 !== state.indent && level > 0)) {\n    compact = false;\n  }\n\n  if (duplicate && state.usedDuplicates[duplicateIndex]) {\n    state.dump = '*ref_' + duplicateIndex;\n  } else {\n    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {\n      state.usedDuplicates[duplicateIndex] = true;\n    }\n    if ('[object Object]' === type) {\n      if (block && (0 !== Object.keys(state.dump).length)) {\n        writeBlockMapping(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowMapping(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if ('[object Array]' === type) {\n      if (block && (0 !== state.dump.length)) {\n        writeBlockSequence(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowSequence(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if ('[object String]' === type) {\n      if ('?' !== state.tag) {\n        writeScalar(state, state.dump, level, iskey);\n      }\n    } else {\n      if (state.skipInvalid) {\n        return false;\n      }\n      throw new YAMLException('unacceptable kind of an object to dump ' + type);\n    }\n\n    if (null !== state.tag && '?' !== state.tag) {\n      state.dump = '!<' + state.tag + '> ' + state.dump;\n    }\n  }\n\n  return true;\n}\n\nfunction getDuplicateReferences(object, state) {\n  var objects = [],\n      duplicatesIndexes = [],\n      index,\n      length;\n\n  inspectNode(object, objects, duplicatesIndexes);\n\n  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {\n    state.duplicates.push(objects[duplicatesIndexes[index]]);\n  }\n  state.usedDuplicates = new Array(length);\n}\n\nfunction inspectNode(object, objects, duplicatesIndexes) {\n  var objectKeyList,\n      index,\n      length;\n\n  if (null !== object && 'object' === typeof object) {\n    index = objects.indexOf(object);\n    if (-1 !== index) {\n      if (-1 === duplicatesIndexes.indexOf(index)) {\n        duplicatesIndexes.push(index);\n      }\n    } else {\n      objects.push(object);\n\n      if (Array.isArray(object)) {\n        for (index = 0, length = object.length; index < length; index += 1) {\n          inspectNode(object[index], objects, duplicatesIndexes);\n        }\n      } else {\n        objectKeyList = Object.keys(object);\n\n        for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);\n        }\n      }\n    }\n  }\n}\n\nfunction dump(input, options) {\n  options = options || {};\n\n  var state = new State(options);\n\n  getDuplicateReferences(input, state);\n\n  if (writeNode(state, 0, input, true, true)) {\n    return state.dump + '\\n';\n  }\n  return '';\n}\n\nfunction safeDump(input, options) {\n  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\nmodule.exports.dump     = dump;\nmodule.exports.safeDump = safeDump;\n",
+    "// YAML error class. http://stackoverflow.com/questions/8458984\n//\n'use strict';\n\n\nvar inherits = require('inherit');\n\n\nfunction YAMLException(reason, mark) {\n  // Super constructor\n  Error.call(this);\n\n  // Include stack trace in error object\n  if (Error.captureStackTrace) {\n    // Chrome and NodeJS\n    Error.captureStackTrace(this, this.constructor);\n  } else {\n    // FF, IE 10+ and Safari 6+. Fallback for others\n    this.stack = (new Error()).stack || '';\n  }\n\n  this.name = 'YAMLException';\n  this.reason = reason;\n  this.mark = mark;\n  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');\n}\n\n\n// Inherit from Error\ninherits(YAMLException, Error);\n\n\nYAMLException.prototype.toString = function toString(compact) {\n  var result = this.name + ': ';\n\n  result += this.reason || '(unknown reason)';\n\n  if (!compact && this.mark) {\n    result += ' ' + this.mark.toString();\n  }\n\n  return result;\n};\n\n\nmodule.exports = YAMLException;\n",
+    "'use strict';\n\n/*eslint-disable max-len,no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar Mark                = require('./mark');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\n\n\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\n\nvar CONTEXT_FLOW_IN   = 1;\nvar CONTEXT_FLOW_OUT  = 2;\nvar CONTEXT_BLOCK_IN  = 3;\nvar CONTEXT_BLOCK_OUT = 4;\n\n\nvar CHOMPING_CLIP  = 1;\nvar CHOMPING_STRIP = 2;\nvar CHOMPING_KEEP  = 3;\n\n\nvar PATTERN_NON_PRINTABLE         = /[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F\\x7F-\\x84\\x86-\\x9F\\uFFFE\\uFFFF]|[\\uD800-\\uDBFF](?![\\uDC00-\\uDFFF])|(?:[^\\uD800-\\uDBFF]|^)[\\uDC00-\\uDFFF]/;\nvar PATTERN_NON_ASCII_LINE_BREAKS = /[\\x85\\u2028\\u2029]/;\nvar PATTERN_FLOW_INDICATORS       = /[,\\[\\]\\{\\}]/;\nvar PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\\-]+!)$/i;\nvar PATTERN_TAG_URI               = /^(?:!|[^,\\[\\]\\{\\}])(?:%[0-9a-f]{2}|[0-9a-z\\-#;\\/\\?:@&=\\+\\$,_\\.!~\\*'\\(\\)\\[\\]])*$/i;\n\n\nfunction is_EOL(c) {\n  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);\n}\n\nfunction is_WHITE_SPACE(c) {\n  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);\n}\n\nfunction is_WS_OR_EOL(c) {\n  return (c === 0x09/* Tab */) ||\n         (c === 0x20/* Space */) ||\n         (c === 0x0A/* LF */) ||\n         (c === 0x0D/* CR */);\n}\n\nfunction is_FLOW_INDICATOR(c) {\n  return 0x2C/* , */ === c ||\n         0x5B/* [ */ === c ||\n         0x5D/* ] */ === c ||\n         0x7B/* { */ === c ||\n         0x7D/* } */ === c;\n}\n\nfunction fromHexCode(c) {\n  var lc;\n\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  /*eslint-disable no-bitwise*/\n  lc = c | 0x20;\n\n  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {\n    return lc - 0x61 + 10;\n  }\n\n  return -1;\n}\n\nfunction escapedHexLen(c) {\n  if (c === 0x78/* x */) { return 2; }\n  if (c === 0x75/* u */) { return 4; }\n  if (c === 0x55/* U */) { return 8; }\n  return 0;\n}\n\nfunction fromDecimalCode(c) {\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  return -1;\n}\n\nfunction simpleEscapeSequence(c) {\n  return (c === 0x30/* 0 */) ? '\\x00' :\n        (c === 0x61/* a */) ? '\\x07' :\n        (c === 0x62/* b */) ? '\\x08' :\n        (c === 0x74/* t */) ? '\\x09' :\n        (c === 0x09/* Tab */) ? '\\x09' :\n        (c === 0x6E/* n */) ? '\\x0A' :\n        (c === 0x76/* v */) ? '\\x0B' :\n        (c === 0x66/* f */) ? '\\x0C' :\n        (c === 0x72/* r */) ? '\\x0D' :\n        (c === 0x65/* e */) ? '\\x1B' :\n        (c === 0x20/* Space */) ? ' ' :\n        (c === 0x22/* \" */) ? '\\x22' :\n        (c === 0x2F/* / */) ? '/' :\n        (c === 0x5C/* \\ */) ? '\\x5C' :\n        (c === 0x4E/* N */) ? '\\x85' :\n        (c === 0x5F/* _ */) ? '\\xA0' :\n        (c === 0x4C/* L */) ? '\\u2028' :\n        (c === 0x50/* P */) ? '\\u2029' : '';\n}\n\nfunction charFromCodepoint(c) {\n  if (c <= 0xFFFF) {\n    return String.fromCharCode(c);\n  }\n  // Encode UTF-16 surrogate pair\n  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF\n  return String.fromCharCode(((c - 0x010000) >> 10) + 0xD800,\n                             ((c - 0x010000) & 0x03FF) + 0xDC00);\n}\n\nvar simpleEscapeCheck = new Array(256); // integer, for fast access\nvar simpleEscapeMap = new Array(256);\nfor (var i = 0; i < 256; i++) {\n  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;\n  simpleEscapeMap[i] = simpleEscapeSequence(i);\n}\n\n\nfunction State(input, options) {\n  this.input = input;\n\n  this.filename  = options['filename']  || null;\n  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;\n  this.onWarning = options['onWarning'] || null;\n  this.legacy    = options['legacy']    || false;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.typeMap       = this.schema.compiledTypeMap;\n\n  this.length     = input.length;\n  this.position   = 0;\n  this.line       = 0;\n  this.lineStart  = 0;\n  this.lineIndent = 0;\n\n  this.documents = [];\n\n  /*\n  this.version;\n  this.checkLineBreaks;\n  this.tagMap;\n  this.anchorMap;\n  this.tag;\n  this.anchor;\n  this.kind;\n  this.result;*/\n\n}\n\n\nfunction generateError(state, message) {\n  return new YAMLException(\n    message,\n    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));\n}\n\nfunction throwError(state, message) {\n  throw generateError(state, message);\n}\n\nfunction throwWarning(state, message) {\n  if (state.onWarning) {\n    state.onWarning.call(null, generateError(state, message));\n  }\n}\n\n\nvar directiveHandlers = {\n\n  YAML: function handleYamlDirective(state, name, args) {\n\n      var match, major, minor;\n\n      if (null !== state.version) {\n        throwError(state, 'duplication of %YAML directive');\n      }\n\n      if (1 !== args.length) {\n        throwError(state, 'YAML directive accepts exactly one argument');\n      }\n\n      match = /^([0-9]+)\\.([0-9]+)$/.exec(args[0]);\n\n      if (null === match) {\n        throwError(state, 'ill-formed argument of the YAML directive');\n      }\n\n      major = parseInt(match[1], 10);\n      minor = parseInt(match[2], 10);\n\n      if (1 !== major) {\n        throwError(state, 'unacceptable YAML version of the document');\n      }\n\n      state.version = args[0];\n      state.checkLineBreaks = (minor < 2);\n\n      if (1 !== minor && 2 !== minor) {\n        throwWarning(state, 'unsupported YAML version of the document');\n      }\n    },\n\n  TAG: function handleTagDirective(state, name, args) {\n\n      var handle, prefix;\n\n      if (2 !== args.length) {\n        throwError(state, 'TAG directive accepts exactly two arguments');\n      }\n\n      handle = args[0];\n      prefix = args[1];\n\n      if (!PATTERN_TAG_HANDLE.test(handle)) {\n        throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');\n      }\n\n      if (_hasOwnProperty.call(state.tagMap, handle)) {\n        throwError(state, 'there is a previously declared suffix for \"' + handle + '\" tag handle');\n      }\n\n      if (!PATTERN_TAG_URI.test(prefix)) {\n        throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');\n      }\n\n      state.tagMap[handle] = prefix;\n    }\n};\n\n\nfunction captureSegment(state, start, end, checkJson) {\n  var _position, _length, _character, _result;\n\n  if (start < end) {\n    _result = state.input.slice(start, end);\n\n    if (checkJson) {\n      for (_position = 0, _length = _result.length;\n           _position < _length;\n           _position += 1) {\n        _character = _result.charCodeAt(_position);\n        if (!(0x09 === _character ||\n              0x20 <= _character && _character <= 0x10FFFF)) {\n          throwError(state, 'expected valid JSON character');\n        }\n      }\n    } else if (PATTERN_NON_PRINTABLE.test(_result)) {\n      throwError(state, 'the stream contains non-printable characters');\n    }\n\n    state.result += _result;\n  }\n}\n\nfunction mergeMappings(state, destination, source) {\n  var sourceKeys, key, index, quantity;\n\n  if (!common.isObject(source)) {\n    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');\n  }\n\n  sourceKeys = Object.keys(source);\n\n  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {\n    key = sourceKeys[index];\n\n    if (!_hasOwnProperty.call(destination, key)) {\n      destination[key] = source[key];\n    }\n  }\n}\n\nfunction storeMappingPair(state, _result, keyTag, keyNode, valueNode) {\n  var index, quantity;\n\n  keyNode = String(keyNode);\n\n  if (null === _result) {\n    _result = {};\n  }\n\n  if ('tag:yaml.org,2002:merge' === keyTag) {\n    if (Array.isArray(valueNode)) {\n      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {\n        mergeMappings(state, _result, valueNode[index]);\n      }\n    } else {\n      mergeMappings(state, _result, valueNode);\n    }\n  } else {\n    _result[keyNode] = valueNode;\n  }\n\n  return _result;\n}\n\nfunction readLineBreak(state) {\n  var ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x0A/* LF */ === ch) {\n    state.position++;\n  } else if (0x0D/* CR */ === ch) {\n    state.position++;\n    if (0x0A/* LF */ === state.input.charCodeAt(state.position)) {\n      state.position++;\n    }\n  } else {\n    throwError(state, 'a line break is expected');\n  }\n\n  state.line += 1;\n  state.lineStart = state.position;\n}\n\nfunction skipSeparationSpace(state, allowComments, checkIndent) {\n  var lineBreaks = 0,\n      ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n    while (is_WHITE_SPACE(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (allowComments && 0x23/* # */ === ch) {\n      do {\n        ch = state.input.charCodeAt(++state.position);\n      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && 0 !== ch);\n    }\n\n    if (is_EOL(ch)) {\n      readLineBreak(state);\n\n      ch = state.input.charCodeAt(state.position);\n      lineBreaks++;\n      state.lineIndent = 0;\n\n      while (0x20/* Space */ === ch) {\n        state.lineIndent++;\n        ch = state.input.charCodeAt(++state.position);\n      }\n    } else {\n      break;\n    }\n  }\n\n  if (-1 !== checkIndent && 0 !== lineBreaks && state.lineIndent < checkIndent) {\n    throwWarning(state, 'deficient indentation');\n  }\n\n  return lineBreaks;\n}\n\nfunction testDocumentSeparator(state) {\n  var _position = state.position,\n      ch;\n\n  ch = state.input.charCodeAt(_position);\n\n  // Condition state.position === state.lineStart is tested\n  // in parent on each call, for efficiency. No needs to test here again.\n  if ((0x2D/* - */ === ch || 0x2E/* . */ === ch) &&\n      state.input.charCodeAt(_position + 1) === ch &&\n      state.input.charCodeAt(_position + 2) === ch) {\n\n    _position += 3;\n\n    ch = state.input.charCodeAt(_position);\n\n    if (ch === 0 || is_WS_OR_EOL(ch)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction writeFoldedLines(state, count) {\n  if (1 === count) {\n    state.result += ' ';\n  } else if (count > 1) {\n    state.result += common.repeat('\\n', count - 1);\n  }\n}\n\n\nfunction readPlainScalar(state, nodeIndent, withinFlowCollection) {\n  var preceding,\n      following,\n      captureStart,\n      captureEnd,\n      hasPendingContent,\n      _line,\n      _lineStart,\n      _lineIndent,\n      _kind = state.kind,\n      _result = state.result,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (is_WS_OR_EOL(ch)             ||\n      is_FLOW_INDICATOR(ch)        ||\n      0x23/* # */           === ch ||\n      0x26/* & */           === ch ||\n      0x2A/* * */           === ch ||\n      0x21/* ! */           === ch ||\n      0x7C/* | */           === ch ||\n      0x3E/* > */           === ch ||\n      0x27/* ' */           === ch ||\n      0x22/* \" */           === ch ||\n      0x25/* % */           === ch ||\n      0x40/* @ */           === ch ||\n      0x60/* ` */           === ch) {\n    return false;\n  }\n\n  if (0x3F/* ? */ === ch || 0x2D/* - */ === ch) {\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (is_WS_OR_EOL(following) ||\n        withinFlowCollection && is_FLOW_INDICATOR(following)) {\n      return false;\n    }\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  captureStart = captureEnd = state.position;\n  hasPendingContent = false;\n\n  while (0 !== ch) {\n    if (0x3A/* : */ === ch) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following) ||\n          withinFlowCollection && is_FLOW_INDICATOR(following)) {\n        break;\n      }\n\n    } else if (0x23/* # */ === ch) {\n      preceding = state.input.charCodeAt(state.position - 1);\n\n      if (is_WS_OR_EOL(preceding)) {\n        break;\n      }\n\n    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||\n               withinFlowCollection && is_FLOW_INDICATOR(ch)) {\n      break;\n\n    } else if (is_EOL(ch)) {\n      _line = state.line;\n      _lineStart = state.lineStart;\n      _lineIndent = state.lineIndent;\n      skipSeparationSpace(state, false, -1);\n\n      if (state.lineIndent >= nodeIndent) {\n        hasPendingContent = true;\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      } else {\n        state.position = captureEnd;\n        state.line = _line;\n        state.lineStart = _lineStart;\n        state.lineIndent = _lineIndent;\n        break;\n      }\n    }\n\n    if (hasPendingContent) {\n      captureSegment(state, captureStart, captureEnd, false);\n      writeFoldedLines(state, state.line - _line);\n      captureStart = captureEnd = state.position;\n      hasPendingContent = false;\n    }\n\n    if (!is_WHITE_SPACE(ch)) {\n      captureEnd = state.position + 1;\n    }\n\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  captureSegment(state, captureStart, captureEnd, false);\n\n  if (state.result) {\n    return true;\n  }\n\n  state.kind = _kind;\n  state.result = _result;\n  return false;\n}\n\nfunction readSingleQuotedScalar(state, nodeIndent) {\n  var ch,\n      captureStart, captureEnd;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x27/* ' */ !== ch) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    if (0x27/* ' */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (0x27/* ' */ === ch) {\n        captureStart = captureEnd = state.position;\n        state.position++;\n      } else {\n        return true;\n      }\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a single quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a single quoted scalar');\n}\n\nfunction readDoubleQuotedScalar(state, nodeIndent) {\n  var captureStart,\n      captureEnd,\n      hexLength,\n      hexResult,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x22/* \" */ !== ch) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    if (0x22/* \" */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      state.position++;\n      return true;\n\n    } else if (0x5C/* \\ */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (is_EOL(ch)) {\n        skipSeparationSpace(state, false, nodeIndent);\n\n        // TODO: rework to inline fn with no type cast?\n      } else if (ch < 256 && simpleEscapeCheck[ch]) {\n        state.result += simpleEscapeMap[ch];\n        state.position++;\n\n      } else if ((tmp = escapedHexLen(ch)) > 0) {\n        hexLength = tmp;\n        hexResult = 0;\n\n        for (; hexLength > 0; hexLength--) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if ((tmp = fromHexCode(ch)) >= 0) {\n            hexResult = (hexResult << 4) + tmp;\n\n          } else {\n            throwError(state, 'expected hexadecimal character');\n          }\n        }\n\n        state.result += charFromCodepoint(hexResult);\n\n        state.position++;\n\n      } else {\n        throwError(state, 'unknown escape sequence');\n      }\n\n      captureStart = captureEnd = state.position;\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a double quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a double quoted scalar');\n}\n\nfunction readFlowCollection(state, nodeIndent) {\n  var readNext = true,\n      _line,\n      _tag     = state.tag,\n      _result,\n      _anchor  = state.anchor,\n      following,\n      terminator,\n      isPair,\n      isExplicitPair,\n      isMapping,\n      keyNode,\n      keyTag,\n      valueNode,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x5B/* [ */) {\n    terminator = 0x5D;/* ] */\n    isMapping = false;\n    _result = [];\n  } else if (ch === 0x7B/* { */) {\n    terminator = 0x7D;/* } */\n    isMapping = true;\n    _result = {};\n  } else {\n    return false;\n  }\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  while (0 !== ch) {\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (ch === terminator) {\n      state.position++;\n      state.tag = _tag;\n      state.anchor = _anchor;\n      state.kind = isMapping ? 'mapping' : 'sequence';\n      state.result = _result;\n      return true;\n    } else if (!readNext) {\n      throwError(state, 'missed comma between flow collection entries');\n    }\n\n    keyTag = keyNode = valueNode = null;\n    isPair = isExplicitPair = false;\n\n    if (0x3F/* ? */ === ch) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following)) {\n        isPair = isExplicitPair = true;\n        state.position++;\n        skipSeparationSpace(state, true, nodeIndent);\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n    keyTag = state.tag;\n    keyNode = state.result;\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((isExplicitPair || state.line === _line) && 0x3A/* : */ === ch) {\n      isPair = true;\n      ch = state.input.charCodeAt(++state.position);\n      skipSeparationSpace(state, true, nodeIndent);\n      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n      valueNode = state.result;\n    }\n\n    if (isMapping) {\n      storeMappingPair(state, _result, keyTag, keyNode, valueNode);\n    } else if (isPair) {\n      _result.push(storeMappingPair(state, null, keyTag, keyNode, valueNode));\n    } else {\n      _result.push(keyNode);\n    }\n\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (0x2C/* , */ === ch) {\n      readNext = true;\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      readNext = false;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a flow collection');\n}\n\nfunction readBlockScalar(state, nodeIndent) {\n  var captureStart,\n      folding,\n      chomping       = CHOMPING_CLIP,\n      detectedIndent = false,\n      textIndent     = nodeIndent,\n      emptyLines     = 0,\n      atMoreIndented = false,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x7C/* | */) {\n    folding = false;\n  } else if (ch === 0x3E/* > */) {\n    folding = true;\n  } else {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n\n  while (0 !== ch) {\n    ch = state.input.charCodeAt(++state.position);\n\n    if (0x2B/* + */ === ch || 0x2D/* - */ === ch) {\n      if (CHOMPING_CLIP === chomping) {\n        chomping = (0x2B/* + */ === ch) ? CHOMPING_KEEP : CHOMPING_STRIP;\n      } else {\n        throwError(state, 'repeat of a chomping mode identifier');\n      }\n\n    } else if ((tmp = fromDecimalCode(ch)) >= 0) {\n      if (tmp === 0) {\n        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');\n      } else if (!detectedIndent) {\n        textIndent = nodeIndent + tmp - 1;\n        detectedIndent = true;\n      } else {\n        throwError(state, 'repeat of an indentation width identifier');\n      }\n\n    } else {\n      break;\n    }\n  }\n\n  if (is_WHITE_SPACE(ch)) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (is_WHITE_SPACE(ch));\n\n    if (0x23/* # */ === ch) {\n      do { ch = state.input.charCodeAt(++state.position); }\n      while (!is_EOL(ch) && (0 !== ch));\n    }\n  }\n\n  while (0 !== ch) {\n    readLineBreak(state);\n    state.lineIndent = 0;\n\n    ch = state.input.charCodeAt(state.position);\n\n    while ((!detectedIndent || state.lineIndent < textIndent) &&\n           (0x20/* Space */ === ch)) {\n      state.lineIndent++;\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (!detectedIndent && state.lineIndent > textIndent) {\n      textIndent = state.lineIndent;\n    }\n\n    if (is_EOL(ch)) {\n      emptyLines++;\n      continue;\n    }\n\n    // End of the scalar.\n    if (state.lineIndent < textIndent) {\n\n      // Perform the chomping.\n      if (chomping === CHOMPING_KEEP) {\n        state.result += common.repeat('\\n', emptyLines);\n      } else if (chomping === CHOMPING_CLIP) {\n        if (detectedIndent) { // i.e. only if the scalar is not empty.\n          state.result += '\\n';\n        }\n      }\n\n      // Break this `while` cycle and go to the funciton's epilogue.\n      break;\n    }\n\n    // Folded style: use fancy rules to handle line breaks.\n    if (folding) {\n\n      // Lines starting with white space characters (more-indented lines) are not folded.\n      if (is_WHITE_SPACE(ch)) {\n        atMoreIndented = true;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // End of more-indented block.\n      } else if (atMoreIndented) {\n        atMoreIndented = false;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // Just one line break - perceive as the same line.\n      } else if (0 === emptyLines) {\n        if (detectedIndent) { // i.e. only if we have already read some scalar content.\n          state.result += ' ';\n        }\n\n      // Several line breaks - perceive as different lines.\n      } else {\n        state.result += common.repeat('\\n', emptyLines);\n      }\n\n    // Literal style: just add exact number of line breaks between content lines.\n    } else if (detectedIndent) {\n      // If current line isn't the first one - count line break from the last content line.\n      state.result += common.repeat('\\n', emptyLines + 1);\n    } else {\n      // In case of the first content line - count only empty lines.\n      state.result += common.repeat('\\n', emptyLines);\n    }\n\n    detectedIndent = true;\n    emptyLines = 0;\n    captureStart = state.position;\n\n    while (!is_EOL(ch) && (0 !== ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    captureSegment(state, captureStart, state.position, false);\n  }\n\n  return true;\n}\n\nfunction readBlockSequence(state, nodeIndent) {\n  var _line,\n      _tag      = state.tag,\n      _anchor   = state.anchor,\n      _result   = [],\n      following,\n      detected  = false,\n      ch;\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n\n    if (0x2D/* - */ !== ch) {\n      break;\n    }\n\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (!is_WS_OR_EOL(following)) {\n      break;\n    }\n\n    detected = true;\n    state.position++;\n\n    if (skipSeparationSpace(state, true, -1)) {\n      if (state.lineIndent <= nodeIndent) {\n        _result.push(null);\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);\n    _result.push(state.result);\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((state.line === _line || state.lineIndent > nodeIndent) && (0 !== ch)) {\n      throwError(state, 'bad indentation of a sequence entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'sequence';\n    state.result = _result;\n    return true;\n  }\n  return false;\n}\n\nfunction readBlockMapping(state, nodeIndent, flowIndent) {\n  var following,\n      allowCompact,\n      _line,\n      _tag          = state.tag,\n      _anchor       = state.anchor,\n      _result       = {},\n      keyTag        = null,\n      keyNode       = null,\n      valueNode     = null,\n      atExplicitKey = false,\n      detected      = false,\n      ch;\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n    following = state.input.charCodeAt(state.position + 1);\n    _line = state.line; // Save the current line.\n\n    //\n    // Explicit notation case. There are two separate blocks:\n    // first for the key (denoted by \"?\") and second for the value (denoted by \":\")\n    //\n    if ((0x3F/* ? */ === ch || 0x3A/* : */  === ch) && is_WS_OR_EOL(following)) {\n\n      if (0x3F/* ? */ === ch) {\n        if (atExplicitKey) {\n          storeMappingPair(state, _result, keyTag, keyNode, null);\n          keyTag = keyNode = valueNode = null;\n        }\n\n        detected = true;\n        atExplicitKey = true;\n        allowCompact = true;\n\n      } else if (atExplicitKey) {\n        // i.e. 0x3A/* : */ === character after the explicit key.\n        atExplicitKey = false;\n        allowCompact = true;\n\n      } else {\n        throwError(state, 'incomplete explicit mapping pair; a key node is missed');\n      }\n\n      state.position += 1;\n      ch = following;\n\n    //\n    // Implicit notation case. Flow-style node as the key first, then \":\", and the value.\n    //\n    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {\n\n      if (state.line === _line) {\n        ch = state.input.charCodeAt(state.position);\n\n        while (is_WHITE_SPACE(ch)) {\n          ch = state.input.charCodeAt(++state.position);\n        }\n\n        if (0x3A/* : */ === ch) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if (!is_WS_OR_EOL(ch)) {\n            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');\n          }\n\n          if (atExplicitKey) {\n            storeMappingPair(state, _result, keyTag, keyNode, null);\n            keyTag = keyNode = valueNode = null;\n          }\n\n          detected = true;\n          atExplicitKey = false;\n          allowCompact = false;\n          keyTag = state.tag;\n          keyNode = state.result;\n\n        } else if (detected) {\n          throwError(state, 'can not read an implicit mapping pair; a colon is missed');\n\n        } else {\n          state.tag = _tag;\n          state.anchor = _anchor;\n          return true; // Keep the result of `composeNode`.\n        }\n\n      } else if (detected) {\n        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');\n\n      } else {\n        state.tag = _tag;\n        state.anchor = _anchor;\n        return true; // Keep the result of `composeNode`.\n      }\n\n    } else {\n      break; // Reading is done. Go to the epilogue.\n    }\n\n    //\n    // Common reading code for both explicit and implicit notations.\n    //\n    if (state.line === _line || state.lineIndent > nodeIndent) {\n      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {\n        if (atExplicitKey) {\n          keyNode = state.result;\n        } else {\n          valueNode = state.result;\n        }\n      }\n\n      if (!atExplicitKey) {\n        storeMappingPair(state, _result, keyTag, keyNode, valueNode);\n        keyTag = keyNode = valueNode = null;\n      }\n\n      skipSeparationSpace(state, true, -1);\n      ch = state.input.charCodeAt(state.position);\n    }\n\n    if (state.lineIndent > nodeIndent && (0 !== ch)) {\n      throwError(state, 'bad indentation of a mapping entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  //\n  // Epilogue.\n  //\n\n  // Special case: last mapping's node contains only the key in explicit notation.\n  if (atExplicitKey) {\n    storeMappingPair(state, _result, keyTag, keyNode, null);\n  }\n\n  // Expose the resulting mapping.\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'mapping';\n    state.result = _result;\n  }\n\n  return detected;\n}\n\nfunction readTagProperty(state) {\n  var _position,\n      isVerbatim = false,\n      isNamed    = false,\n      tagHandle,\n      tagName,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x21/* ! */ !== ch) {\n    return false;\n  }\n\n  if (null !== state.tag) {\n    throwError(state, 'duplication of a tag property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  if (0x3C/* < */ === ch) {\n    isVerbatim = true;\n    ch = state.input.charCodeAt(++state.position);\n\n  } else if (0x21/* ! */ === ch) {\n    isNamed = true;\n    tagHandle = '!!';\n    ch = state.input.charCodeAt(++state.position);\n\n  } else {\n    tagHandle = '!';\n  }\n\n  _position = state.position;\n\n  if (isVerbatim) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (0 !== ch && 0x3E/* > */ !== ch);\n\n    if (state.position < state.length) {\n      tagName = state.input.slice(_position, state.position);\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      throwError(state, 'unexpected end of the stream within a verbatim tag');\n    }\n  } else {\n    while (0 !== ch && !is_WS_OR_EOL(ch)) {\n\n      if (0x21/* ! */ === ch) {\n        if (!isNamed) {\n          tagHandle = state.input.slice(_position - 1, state.position + 1);\n\n          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {\n            throwError(state, 'named tag handle cannot contain such characters');\n          }\n\n          isNamed = true;\n          _position = state.position + 1;\n        } else {\n          throwError(state, 'tag suffix cannot contain exclamation marks');\n        }\n      }\n\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    tagName = state.input.slice(_position, state.position);\n\n    if (PATTERN_FLOW_INDICATORS.test(tagName)) {\n      throwError(state, 'tag suffix cannot contain flow indicator characters');\n    }\n  }\n\n  if (tagName && !PATTERN_TAG_URI.test(tagName)) {\n    throwError(state, 'tag name cannot contain such characters: ' + tagName);\n  }\n\n  if (isVerbatim) {\n    state.tag = tagName;\n\n  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {\n    state.tag = state.tagMap[tagHandle] + tagName;\n\n  } else if ('!' === tagHandle) {\n    state.tag = '!' + tagName;\n\n  } else if ('!!' === tagHandle) {\n    state.tag = 'tag:yaml.org,2002:' + tagName;\n\n  } else {\n    throwError(state, 'undeclared tag handle \"' + tagHandle + '\"');\n  }\n\n  return true;\n}\n\nfunction readAnchorProperty(state) {\n  var _position,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x26/* & */ !== ch) {\n    return false;\n  }\n\n  if (null !== state.anchor) {\n    throwError(state, 'duplication of an anchor property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (0 !== ch && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an anchor node must contain at least one character');\n  }\n\n  state.anchor = state.input.slice(_position, state.position);\n  return true;\n}\n\nfunction readAlias(state) {\n  var _position, alias,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x2A/* * */ !== ch) {\n    return false;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (0 !== ch && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an alias node must contain at least one character');\n  }\n\n  alias = state.input.slice(_position, state.position);\n\n  if (!state.anchorMap.hasOwnProperty(alias)) {\n    throwError(state, 'unidentified alias \"' + alias + '\"');\n  }\n\n  state.result = state.anchorMap[alias];\n  skipSeparationSpace(state, true, -1);\n  return true;\n}\n\nfunction composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {\n  var allowBlockStyles,\n      allowBlockScalars,\n      allowBlockCollections,\n      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent\n      atNewLine  = false,\n      hasContent = false,\n      typeIndex,\n      typeQuantity,\n      type,\n      flowIndent,\n      blockIndent;\n\n  state.tag    = null;\n  state.anchor = null;\n  state.kind   = null;\n  state.result = null;\n\n  allowBlockStyles = allowBlockScalars = allowBlockCollections =\n    CONTEXT_BLOCK_OUT === nodeContext ||\n    CONTEXT_BLOCK_IN  === nodeContext;\n\n  if (allowToSeek) {\n    if (skipSeparationSpace(state, true, -1)) {\n      atNewLine = true;\n\n      if (state.lineIndent > parentIndent) {\n        indentStatus = 1;\n      } else if (state.lineIndent === parentIndent) {\n        indentStatus = 0;\n      } else if (state.lineIndent < parentIndent) {\n        indentStatus = -1;\n      }\n    }\n  }\n\n  if (1 === indentStatus) {\n    while (readTagProperty(state) || readAnchorProperty(state)) {\n      if (skipSeparationSpace(state, true, -1)) {\n        atNewLine = true;\n        allowBlockCollections = allowBlockStyles;\n\n        if (state.lineIndent > parentIndent) {\n          indentStatus = 1;\n        } else if (state.lineIndent === parentIndent) {\n          indentStatus = 0;\n        } else if (state.lineIndent < parentIndent) {\n          indentStatus = -1;\n        }\n      } else {\n        allowBlockCollections = false;\n      }\n    }\n  }\n\n  if (allowBlockCollections) {\n    allowBlockCollections = atNewLine || allowCompact;\n  }\n\n  if (1 === indentStatus || CONTEXT_BLOCK_OUT === nodeContext) {\n    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {\n      flowIndent = parentIndent;\n    } else {\n      flowIndent = parentIndent + 1;\n    }\n\n    blockIndent = state.position - state.lineStart;\n\n    if (1 === indentStatus) {\n      if (allowBlockCollections &&\n          (readBlockSequence(state, blockIndent) ||\n           readBlockMapping(state, blockIndent, flowIndent)) ||\n          readFlowCollection(state, flowIndent)) {\n        hasContent = true;\n      } else {\n        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||\n            readSingleQuotedScalar(state, flowIndent) ||\n            readDoubleQuotedScalar(state, flowIndent)) {\n          hasContent = true;\n\n        } else if (readAlias(state)) {\n          hasContent = true;\n\n          if (null !== state.tag || null !== state.anchor) {\n            throwError(state, 'alias node should not have any properties');\n          }\n\n        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {\n          hasContent = true;\n\n          if (null === state.tag) {\n            state.tag = '?';\n          }\n        }\n\n        if (null !== state.anchor) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else if (0 === indentStatus) {\n      // Special case: block sequences are allowed to have same indentation level as the parent.\n      // http://www.yaml.org/spec/1.2/spec.html#id2799784\n      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);\n    }\n  }\n\n  if (null !== state.tag && '!' !== state.tag) {\n    if ('?' === state.tag) {\n      for (typeIndex = 0, typeQuantity = state.implicitTypes.length;\n           typeIndex < typeQuantity;\n           typeIndex += 1) {\n        type = state.implicitTypes[typeIndex];\n\n        // Implicit resolving is not allowed for non-scalar types, and '?'\n        // non-specific tag is only assigned to plain scalars. So, it isn't\n        // needed to check for 'kind' conformity.\n\n        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched\n          state.result = type.construct(state.result);\n          state.tag = type.tag;\n          if (null !== state.anchor) {\n            state.anchorMap[state.anchor] = state.result;\n          }\n          break;\n        }\n      }\n    } else if (_hasOwnProperty.call(state.typeMap, state.tag)) {\n      type = state.typeMap[state.tag];\n\n      if (null !== state.result && type.kind !== state.kind) {\n        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be \"' + type.kind + '\", not \"' + state.kind + '\"');\n      }\n\n      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched\n        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');\n      } else {\n        state.result = type.construct(state.result);\n        if (null !== state.anchor) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else {\n      throwError(state, 'unknown tag !<' + state.tag + '>');\n    }\n  }\n\n  return null !== state.tag || null !== state.anchor || hasContent;\n}\n\nfunction readDocument(state) {\n  var documentStart = state.position,\n      _position,\n      directiveName,\n      directiveArgs,\n      hasDirectives = false,\n      ch;\n\n  state.version = null;\n  state.checkLineBreaks = state.legacy;\n  state.tagMap = {};\n  state.anchorMap = {};\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (state.lineIndent > 0 || 0x25/* % */ !== ch) {\n      break;\n    }\n\n    hasDirectives = true;\n    ch = state.input.charCodeAt(++state.position);\n    _position = state.position;\n\n    while (0 !== ch && !is_WS_OR_EOL(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    directiveName = state.input.slice(_position, state.position);\n    directiveArgs = [];\n\n    if (directiveName.length < 1) {\n      throwError(state, 'directive name must not be less than one character in length');\n    }\n\n    while (0 !== ch) {\n      while (is_WHITE_SPACE(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      if (0x23/* # */ === ch) {\n        do { ch = state.input.charCodeAt(++state.position); }\n        while (0 !== ch && !is_EOL(ch));\n        break;\n      }\n\n      if (is_EOL(ch)) {\n        break;\n      }\n\n      _position = state.position;\n\n      while (0 !== ch && !is_WS_OR_EOL(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      directiveArgs.push(state.input.slice(_position, state.position));\n    }\n\n    if (0 !== ch) {\n      readLineBreak(state);\n    }\n\n    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {\n      directiveHandlers[directiveName](state, directiveName, directiveArgs);\n    } else {\n      throwWarning(state, 'unknown document directive \"' + directiveName + '\"');\n    }\n  }\n\n  skipSeparationSpace(state, true, -1);\n\n  if (0 === state.lineIndent &&\n      0x2D/* - */ === state.input.charCodeAt(state.position) &&\n      0x2D/* - */ === state.input.charCodeAt(state.position + 1) &&\n      0x2D/* - */ === state.input.charCodeAt(state.position + 2)) {\n    state.position += 3;\n    skipSeparationSpace(state, true, -1);\n\n  } else if (hasDirectives) {\n    throwError(state, 'directives end mark is expected');\n  }\n\n  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);\n  skipSeparationSpace(state, true, -1);\n\n  if (state.checkLineBreaks &&\n      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {\n    throwWarning(state, 'non-ASCII line breaks are interpreted as content');\n  }\n\n  state.documents.push(state.result);\n\n  if (state.position === state.lineStart && testDocumentSeparator(state)) {\n\n    if (0x2E/* . */ === state.input.charCodeAt(state.position)) {\n      state.position += 3;\n      skipSeparationSpace(state, true, -1);\n    }\n    return;\n  }\n\n  if (state.position < (state.length - 1)) {\n    throwError(state, 'end of the stream or a document separator is expected');\n  } else {\n    return;\n  }\n}\n\n\nfunction loadDocuments(input, options) {\n  input = String(input);\n  options = options || {};\n\n  if (input.length !== 0) {\n\n    // Add tailing `\\n` if not exists\n    if (0x0A/* LF */ !== input.charCodeAt(input.length - 1) &&\n        0x0D/* CR */ !== input.charCodeAt(input.length - 1)) {\n      input += '\\n';\n    }\n\n    // Strip BOM\n    if (input.charCodeAt(0) === 0xFEFF) {\n      input = input.slice(1);\n    }\n  }\n\n  var state = new State(input, options);\n\n  // Use 0 as string terminator. That significantly simplifies bounds check.\n  state.input += '\\0';\n\n  while (0x20/* Space */ === state.input.charCodeAt(state.position)) {\n    state.lineIndent += 1;\n    state.position += 1;\n  }\n\n  while (state.position < (state.length - 1)) {\n    readDocument(state);\n  }\n\n  return state.documents;\n}\n\n\nfunction loadAll(input, iterator, options) {\n  var documents = loadDocuments(input, options), index, length;\n\n  for (index = 0, length = documents.length; index < length; index += 1) {\n    iterator(documents[index]);\n  }\n}\n\n\nfunction load(input, options) {\n  var documents = loadDocuments(input, options);\n\n  if (0 === documents.length) {\n    /*eslint-disable no-undefined*/\n    return undefined;\n  } else if (1 === documents.length) {\n    return documents[0];\n  }\n  throw new YAMLException('expected a single document in the stream, but found more');\n}\n\n\nfunction safeLoadAll(input, output, options) {\n  loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nfunction safeLoad(input, options) {\n  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nmodule.exports.loadAll     = loadAll;\nmodule.exports.load        = load;\nmodule.exports.safeLoadAll = safeLoadAll;\nmodule.exports.safeLoad    = safeLoad;\n",
     "'use strict';\n\n\nvar common = require('./common');\n\n\nfunction Mark(name, buffer, position, line, column) {\n  this.name     = name;\n  this.buffer   = buffer;\n  this.position = position;\n  this.line     = line;\n  this.column   = column;\n}\n\n\nMark.prototype.getSnippet = function getSnippet(indent, maxLength) {\n  var head, start, tail, end, snippet;\n\n  if (!this.buffer) {\n    return null;\n  }\n\n  indent = indent || 4;\n  maxLength = maxLength || 75;\n\n  head = '';\n  start = this.position;\n\n  while (start > 0 && -1 === '\\x00\\r\\n\\x85\\u2028\\u2029'.indexOf(this.buffer.charAt(start - 1))) {\n    start -= 1;\n    if (this.position - start > (maxLength / 2 - 1)) {\n      head = ' ... ';\n      start += 5;\n      break;\n    }\n  }\n\n  tail = '';\n  end = this.position;\n\n  while (end < this.buffer.length && -1 === '\\x00\\r\\n\\x85\\u2028\\u2029'.indexOf(this.buffer.charAt(end))) {\n    end += 1;\n    if (end - this.position > (maxLength / 2 - 1)) {\n      tail = ' ... ';\n      end -= 5;\n      break;\n    }\n  }\n\n  snippet = this.buffer.slice(start, end);\n\n  return common.repeat(' ', indent) + head + snippet + tail + '\\n' +\n         common.repeat(' ', indent + this.position - start + head.length) + '^';\n};\n\n\nMark.prototype.toString = function toString(compact) {\n  var snippet, where = '';\n\n  if (this.name) {\n    where += 'in \"' + this.name + '\" ';\n  }\n\n  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);\n\n  if (!compact) {\n    snippet = this.getSnippet();\n\n    if (snippet) {\n      where += ':\\n' + snippet;\n    }\n  }\n\n  return where;\n};\n\n\nmodule.exports = Mark;\n",
     "'use strict';\n\n/*eslint-disable max-len*/\n\nvar common        = require('./common');\nvar YAMLException = require('./exception');\nvar Type          = require('./type');\n\n\nfunction compileList(schema, name, result) {\n  var exclude = [];\n\n  schema.include.forEach(function (includedSchema) {\n    result = compileList(includedSchema, name, result);\n  });\n\n  schema[name].forEach(function (currentType) {\n    result.forEach(function (previousType, previousIndex) {\n      if (previousType.tag === currentType.tag) {\n        exclude.push(previousIndex);\n      }\n    });\n\n    result.push(currentType);\n  });\n\n  return result.filter(function (type, index) {\n    return -1 === exclude.indexOf(index);\n  });\n}\n\n\nfunction compileMap(/* lists... */) {\n  var result = {}, index, length;\n\n  function collectType(type) {\n    result[type.tag] = type;\n  }\n\n  for (index = 0, length = arguments.length; index < length; index += 1) {\n    arguments[index].forEach(collectType);\n  }\n\n  return result;\n}\n\n\nfunction Schema(definition) {\n  this.include  = definition.include  || [];\n  this.implicit = definition.implicit || [];\n  this.explicit = definition.explicit || [];\n\n  this.implicit.forEach(function (type) {\n    if (type.loadKind && 'scalar' !== type.loadKind) {\n      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');\n    }\n  });\n\n  this.compiledImplicit = compileList(this, 'implicit', []);\n  this.compiledExplicit = compileList(this, 'explicit', []);\n  this.compiledTypeMap  = compileMap(this.compiledImplicit, this.compiledExplicit);\n}\n\n\nSchema.DEFAULT = null;\n\n\nSchema.create = function createSchema() {\n  var schemas, types;\n\n  switch (arguments.length) {\n  case 1:\n    schemas = Schema.DEFAULT;\n    types = arguments[0];\n    break;\n\n  case 2:\n    schemas = arguments[0];\n    types = arguments[1];\n    break;\n\n  default:\n    throw new YAMLException('Wrong number of arguments for Schema.create function');\n  }\n\n  schemas = common.toArray(schemas);\n  types = common.toArray(types);\n\n  if (!schemas.every(function (schema) { return schema instanceof Schema; })) {\n    throw new YAMLException('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');\n  }\n\n  if (!types.every(function (type) { return type instanceof Type; })) {\n    throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');\n  }\n\n  return new Schema({\n    include: schemas,\n    explicit: types\n  });\n};\n\n\nmodule.exports = Schema;\n",
     "// Standard YAML's Core schema.\n// http://www.yaml.org/spec/1.2/spec.html#id2804923\n//\n// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.\n// So, Core schema has no distinctions from JSON schema is JS-YAML.\n\n\n'use strict';\n\n\nvar Schema = require('../schema');\n\n\nmodule.exports = new Schema({\n  include: [\n    require('./json')\n  ]\n});\n",
@@ -150,7 +149,7 @@
     "'use strict';\n\nvar YAMLException = require('./exception');\n\nvar TYPE_CONSTRUCTOR_OPTIONS = [\n  'kind',\n  'resolve',\n  'construct',\n  'instanceOf',\n  'predicate',\n  'represent',\n  'defaultStyle',\n  'styleAliases'\n];\n\nvar YAML_NODE_KINDS = [\n  'scalar',\n  'sequence',\n  'mapping'\n];\n\nfunction compileStyleAliases(map) {\n  var result = {};\n\n  if (null !== map) {\n    Object.keys(map).forEach(function (style) {\n      map[style].forEach(function (alias) {\n        result[String(alias)] = style;\n      });\n    });\n  }\n\n  return result;\n}\n\nfunction Type(tag, options) {\n  options = options || {};\n\n  Object.keys(options).forEach(function (name) {\n    if (-1 === TYPE_CONSTRUCTOR_OPTIONS.indexOf(name)) {\n      throw new YAMLException('Unknown option \"' + name + '\" is met in definition of \"' + tag + '\" YAML type.');\n    }\n  });\n\n  // TODO: Add tag format check.\n  this.tag          = tag;\n  this.kind         = options['kind']         || null;\n  this.resolve      = options['resolve']      || function () { return true; };\n  this.construct    = options['construct']    || function (data) { return data; };\n  this.instanceOf   = options['instanceOf']   || null;\n  this.predicate    = options['predicate']    || null;\n  this.represent    = options['represent']    || null;\n  this.defaultStyle = options['defaultStyle'] || null;\n  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);\n\n  if (-1 === YAML_NODE_KINDS.indexOf(this.kind)) {\n    throw new YAMLException('Unknown kind \"' + this.kind + '\" is specified for \"' + tag + '\" YAML type.');\n  }\n}\n\nmodule.exports = Type;\n",
     "'use strict';\n\n/*eslint-disable no-bitwise*/\n\n// A trick for browserified version.\n// Since we make browserifier to ignore `buffer` module, NodeBuffer will be undefined\nvar NodeBuffer = require('buffer').Buffer;\nvar Type       = require('../type');\n\n\n// [ 64, 65, 66 ] -> [ padding, CR, LF ]\nvar BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\\n\\r';\n\n\nfunction resolveYamlBinary(data) {\n  if (null === data) {\n    return false;\n  }\n\n  var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;\n\n  // Convert one by one.\n  for (idx = 0; idx < max; idx++) {\n    code = map.indexOf(data.charAt(idx));\n\n    // Skip CR/LF\n    if (code > 64) { continue; }\n\n    // Fail on illegal characters\n    if (code < 0) { return false; }\n\n    bitlen += 6;\n  }\n\n  // If there are any bits left, source was corrupted\n  return (bitlen % 8) === 0;\n}\n\nfunction constructYamlBinary(data) {\n  var idx, tailbits,\n      input = data.replace(/[\\r\\n=]/g, ''), // remove CR/LF & padding to simplify scan\n      max = input.length,\n      map = BASE64_MAP,\n      bits = 0,\n      result = [];\n\n  // Collect by 6*4 bits (3 bytes)\n\n  for (idx = 0; idx < max; idx++) {\n    if ((idx % 4 === 0) && idx) {\n      result.push((bits >> 16) & 0xFF);\n      result.push((bits >> 8) & 0xFF);\n      result.push(bits & 0xFF);\n    }\n\n    bits = (bits << 6) | map.indexOf(input.charAt(idx));\n  }\n\n  // Dump tail\n\n  tailbits = (max % 4) * 6;\n\n  if (tailbits === 0) {\n    result.push((bits >> 16) & 0xFF);\n    result.push((bits >> 8) & 0xFF);\n    result.push(bits & 0xFF);\n  } else if (tailbits === 18) {\n    result.push((bits >> 10) & 0xFF);\n    result.push((bits >> 2) & 0xFF);\n  } else if (tailbits === 12) {\n    result.push((bits >> 4) & 0xFF);\n  }\n\n  // Wrap into Buffer for NodeJS and leave Array for browser\n  if (NodeBuffer) {\n    return new NodeBuffer(result);\n  }\n\n  return result;\n}\n\nfunction representYamlBinary(object /*, style*/) {\n  var result = '', bits = 0, idx, tail,\n      max = object.length,\n      map = BASE64_MAP;\n\n  // Convert every three bytes to 4 ASCII characters.\n\n  for (idx = 0; idx < max; idx++) {\n    if ((idx % 3 === 0) && idx) {\n      result += map[(bits >> 18) & 0x3F];\n      result += map[(bits >> 12) & 0x3F];\n      result += map[(bits >> 6) & 0x3F];\n      result += map[bits & 0x3F];\n    }\n\n    bits = (bits << 8) + object[idx];\n  }\n\n  // Dump tail\n\n  tail = max % 3;\n\n  if (tail === 0) {\n    result += map[(bits >> 18) & 0x3F];\n    result += map[(bits >> 12) & 0x3F];\n    result += map[(bits >> 6) & 0x3F];\n    result += map[bits & 0x3F];\n  } else if (tail === 2) {\n    result += map[(bits >> 10) & 0x3F];\n    result += map[(bits >> 4) & 0x3F];\n    result += map[(bits << 2) & 0x3F];\n    result += map[64];\n  } else if (tail === 1) {\n    result += map[(bits >> 2) & 0x3F];\n    result += map[(bits << 4) & 0x3F];\n    result += map[64];\n    result += map[64];\n  }\n\n  return result;\n}\n\nfunction isBinary(object) {\n  return NodeBuffer && NodeBuffer.isBuffer(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:binary', {\n  kind: 'scalar',\n  resolve: resolveYamlBinary,\n  construct: constructYamlBinary,\n  predicate: isBinary,\n  represent: representYamlBinary\n});\n",
     "'use strict';\n\nvar Type = require('../type');\n\nfunction resolveYamlBoolean(data) {\n  if (null === data) {\n    return false;\n  }\n\n  var max = data.length;\n\n  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||\n         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));\n}\n\nfunction constructYamlBoolean(data) {\n  return data === 'true' ||\n         data === 'True' ||\n         data === 'TRUE';\n}\n\nfunction isBoolean(object) {\n  return '[object Boolean]' === Object.prototype.toString.call(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:bool', {\n  kind: 'scalar',\n  resolve: resolveYamlBoolean,\n  construct: constructYamlBoolean,\n  predicate: isBoolean,\n  represent: {\n    lowercase: function (object) { return object ? 'true' : 'false'; },\n    uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },\n    camelcase: function (object) { return object ? 'True' : 'False'; }\n  },\n  defaultStyle: 'lowercase'\n});\n",
-    "'use strict';\n\nvar common = require('../common');\nvar Type   = require('../type');\n\nvar YAML_FLOAT_PATTERN = new RegExp(\n  '^(?:[-+]?(?:[0-9][0-9_]*)\\\\.[0-9_]*(?:[eE][-+][0-9]+)?' +\n  '|\\\\.[0-9_]+(?:[eE][-+][0-9]+)?' +\n  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\\\.[0-9_]*' +\n  '|[-+]?\\\\.(?:inf|Inf|INF)' +\n  '|\\\\.(?:nan|NaN|NAN))$');\n\nfunction resolveYamlFloat(data) {\n  if (null === data) {\n    return false;\n  }\n\n  if (!YAML_FLOAT_PATTERN.test(data)) {\n    return false;\n  }\n  return true;\n}\n\nfunction constructYamlFloat(data) {\n  var value, sign, base, digits;\n\n  value  = data.replace(/_/g, '').toLowerCase();\n  sign   = '-' === value[0] ? -1 : 1;\n  digits = [];\n\n  if (0 <= '+-'.indexOf(value[0])) {\n    value = value.slice(1);\n  }\n\n  if ('.inf' === value) {\n    return (1 === sign) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;\n\n  } else if ('.nan' === value) {\n    return NaN;\n\n  } else if (0 <= value.indexOf(':')) {\n    value.split(':').forEach(function (v) {\n      digits.unshift(parseFloat(v, 10));\n    });\n\n    value = 0.0;\n    base = 1;\n\n    digits.forEach(function (d) {\n      value += d * base;\n      base *= 60;\n    });\n\n    return sign * value;\n\n  }\n  return sign * parseFloat(value, 10);\n}\n\nfunction representYamlFloat(object, style) {\n  if (isNaN(object)) {\n    switch (style) {\n    case 'lowercase':\n      return '.nan';\n    case 'uppercase':\n      return '.NAN';\n    case 'camelcase':\n      return '.NaN';\n    }\n  } else if (Number.POSITIVE_INFINITY === object) {\n    switch (style) {\n    case 'lowercase':\n      return '.inf';\n    case 'uppercase':\n      return '.INF';\n    case 'camelcase':\n      return '.Inf';\n    }\n  } else if (Number.NEGATIVE_INFINITY === object) {\n    switch (style) {\n    case 'lowercase':\n      return '-.inf';\n    case 'uppercase':\n      return '-.INF';\n    case 'camelcase':\n      return '-.Inf';\n    }\n  } else if (common.isNegativeZero(object)) {\n    return '-0.0';\n  }\n  return object.toString(10);\n}\n\nfunction isFloat(object) {\n  return ('[object Number]' === Object.prototype.toString.call(object)) &&\n         (0 !== object % 1 || common.isNegativeZero(object));\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:float', {\n  kind: 'scalar',\n  resolve: resolveYamlFloat,\n  construct: constructYamlFloat,\n  predicate: isFloat,\n  represent: representYamlFloat,\n  defaultStyle: 'lowercase'\n});\n",
+    "'use strict';\n\nvar common = require('../common');\nvar Type   = require('../type');\n\nvar YAML_FLOAT_PATTERN = new RegExp(\n  '^(?:[-+]?(?:[0-9][0-9_]*)\\\\.[0-9_]*(?:[eE][-+][0-9]+)?' +\n  '|\\\\.[0-9_]+(?:[eE][-+][0-9]+)?' +\n  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\\\.[0-9_]*' +\n  '|[-+]?\\\\.(?:inf|Inf|INF)' +\n  '|\\\\.(?:nan|NaN|NAN))$');\n\nfunction resolveYamlFloat(data) {\n  if (null === data) {\n    return false;\n  }\n\n  if (!YAML_FLOAT_PATTERN.test(data)) {\n    return false;\n  }\n  return true;\n}\n\nfunction constructYamlFloat(data) {\n  var value, sign, base, digits;\n\n  value  = data.replace(/_/g, '').toLowerCase();\n  sign   = '-' === value[0] ? -1 : 1;\n  digits = [];\n\n  if (0 <= '+-'.indexOf(value[0])) {\n    value = value.slice(1);\n  }\n\n  if ('.inf' === value) {\n    return (1 === sign) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;\n\n  } else if ('.nan' === value) {\n    return NaN;\n\n  } else if (0 <= value.indexOf(':')) {\n    value.split(':').forEach(function (v) {\n      digits.unshift(parseFloat(v, 10));\n    });\n\n    value = 0.0;\n    base = 1;\n\n    digits.forEach(function (d) {\n      value += d * base;\n      base *= 60;\n    });\n\n    return sign * value;\n\n  }\n  return sign * parseFloat(value, 10);\n}\n\n\nvar SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;\n\nfunction representYamlFloat(object, style) {\n  var res;\n\n  if (isNaN(object)) {\n    switch (style) {\n    case 'lowercase':\n      return '.nan';\n    case 'uppercase':\n      return '.NAN';\n    case 'camelcase':\n      return '.NaN';\n    }\n  } else if (Number.POSITIVE_INFINITY === object) {\n    switch (style) {\n    case 'lowercase':\n      return '.inf';\n    case 'uppercase':\n      return '.INF';\n    case 'camelcase':\n      return '.Inf';\n    }\n  } else if (Number.NEGATIVE_INFINITY === object) {\n    switch (style) {\n    case 'lowercase':\n      return '-.inf';\n    case 'uppercase':\n      return '-.INF';\n    case 'camelcase':\n      return '-.Inf';\n    }\n  } else if (common.isNegativeZero(object)) {\n    return '-0.0';\n  }\n\n  res = object.toString(10);\n\n  // JS stringifier can build scientific format without dots: 5e-100,\n  // while YAML requres dot: 5.e-100. Fix it with simple hack\n\n  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;\n}\n\nfunction isFloat(object) {\n  return ('[object Number]' === Object.prototype.toString.call(object)) &&\n         (0 !== object % 1 || common.isNegativeZero(object));\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:float', {\n  kind: 'scalar',\n  resolve: resolveYamlFloat,\n  construct: constructYamlFloat,\n  predicate: isFloat,\n  represent: representYamlFloat,\n  defaultStyle: 'lowercase'\n});\n",
     "'use strict';\n\nvar common = require('../common');\nvar Type   = require('../type');\n\nfunction isHexCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||\n         ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||\n         ((0x61/* a */ <= c) && (c <= 0x66/* f */));\n}\n\nfunction isOctCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));\n}\n\nfunction isDecCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));\n}\n\nfunction resolveYamlInteger(data) {\n  if (null === data) {\n    return false;\n  }\n\n  var max = data.length,\n      index = 0,\n      hasDigits = false,\n      ch;\n\n  if (!max) { return false; }\n\n  ch = data[index];\n\n  // sign\n  if (ch === '-' || ch === '+') {\n    ch = data[++index];\n  }\n\n  if (ch === '0') {\n    // 0\n    if (index + 1 === max) { return true; }\n    ch = data[++index];\n\n    // base 2, base 8, base 16\n\n    if (ch === 'b') {\n      // base 2\n      index++;\n\n      for (; index < max; index++) {\n        ch = data[index];\n        if (ch === '_') { continue; }\n        if (ch !== '0' && ch !== '1') {\n          return false;\n        }\n        hasDigits = true;\n      }\n      return hasDigits;\n    }\n\n\n    if (ch === 'x') {\n      // base 16\n      index++;\n\n      for (; index < max; index++) {\n        ch = data[index];\n        if (ch === '_') { continue; }\n        if (!isHexCode(data.charCodeAt(index))) {\n          return false;\n        }\n        hasDigits = true;\n      }\n      return hasDigits;\n    }\n\n    // base 8\n    for (; index < max; index++) {\n      ch = data[index];\n      if (ch === '_') { continue; }\n      if (!isOctCode(data.charCodeAt(index))) {\n        return false;\n      }\n      hasDigits = true;\n    }\n    return hasDigits;\n  }\n\n  // base 10 (except 0) or base 60\n\n  for (; index < max; index++) {\n    ch = data[index];\n    if (ch === '_') { continue; }\n    if (ch === ':') { break; }\n    if (!isDecCode(data.charCodeAt(index))) {\n      return false;\n    }\n    hasDigits = true;\n  }\n\n  if (!hasDigits) { return false; }\n\n  // if !base60 - done;\n  if (ch !== ':') { return true; }\n\n  // base60 almost not used, no needs to optimize\n  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));\n}\n\nfunction constructYamlInteger(data) {\n  var value = data, sign = 1, ch, base, digits = [];\n\n  if (value.indexOf('_') !== -1) {\n    value = value.replace(/_/g, '');\n  }\n\n  ch = value[0];\n\n  if (ch === '-' || ch === '+') {\n    if (ch === '-') { sign = -1; }\n    value = value.slice(1);\n    ch = value[0];\n  }\n\n  if ('0' === value) {\n    return 0;\n  }\n\n  if (ch === '0') {\n    if (value[1] === 'b') {\n      return sign * parseInt(value.slice(2), 2);\n    }\n    if (value[1] === 'x') {\n      return sign * parseInt(value, 16);\n    }\n    return sign * parseInt(value, 8);\n\n  }\n\n  if (value.indexOf(':') !== -1) {\n    value.split(':').forEach(function (v) {\n      digits.unshift(parseInt(v, 10));\n    });\n\n    value = 0;\n    base = 1;\n\n    digits.forEach(function (d) {\n      value += (d * base);\n      base *= 60;\n    });\n\n    return sign * value;\n\n  }\n\n  return sign * parseInt(value, 10);\n}\n\nfunction isInteger(object) {\n  return ('[object Number]' === Object.prototype.toString.call(object)) &&\n         (0 === object % 1 && !common.isNegativeZero(object));\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:int', {\n  kind: 'scalar',\n  resolve: resolveYamlInteger,\n  construct: constructYamlInteger,\n  predicate: isInteger,\n  represent: {\n    binary:      function (object) { return '0b' + object.toString(2); },\n    octal:       function (object) { return '0'  + object.toString(8); },\n    decimal:     function (object) { return        object.toString(10); },\n    hexadecimal: function (object) { return '0x' + object.toString(16).toUpperCase(); }\n  },\n  defaultStyle: 'decimal',\n  styleAliases: {\n    binary:      [ 2,  'bin' ],\n    octal:       [ 8,  'oct' ],\n    decimal:     [ 10, 'dec' ],\n    hexadecimal: [ 16, 'hex' ]\n  }\n});\n",
     "'use strict';\n\nvar esprima;\n\n// Browserified version does not have esprima\n//\n// 1. For node.js just require module as deps\n// 2. For browser try to require mudule via external AMD system.\n//    If not found - try to fallback to window.esprima. If not\n//    found too - then fail to parse.\n//\ntry {\n  esprima = require('esprima');\n} catch (_) {\n  /*global window */\n  if (typeof window !== 'undefined') { esprima = window.esprima; }\n}\n\nvar Type = require('../../type');\n\nfunction resolveJavascriptFunction(data) {\n  if (null === data) {\n    return false;\n  }\n\n  try {\n    var source = '(' + data + ')',\n        ast    = esprima.parse(source, { range: true });\n\n    if ('Program'             !== ast.type         ||\n        1                     !== ast.body.length  ||\n        'ExpressionStatement' !== ast.body[0].type ||\n        'FunctionExpression'  !== ast.body[0].expression.type) {\n      return false;\n    }\n\n    return true;\n  } catch (err) {\n    return false;\n  }\n}\n\nfunction constructJavascriptFunction(data) {\n  /*jslint evil:true*/\n\n  var source = '(' + data + ')',\n      ast    = esprima.parse(source, { range: true }),\n      params = [],\n      body;\n\n  if ('Program'             !== ast.type         ||\n      1                     !== ast.body.length  ||\n      'ExpressionStatement' !== ast.body[0].type ||\n      'FunctionExpression'  !== ast.body[0].expression.type) {\n    throw new Error('Failed to resolve function');\n  }\n\n  ast.body[0].expression.params.forEach(function (param) {\n    params.push(param.name);\n  });\n\n  body = ast.body[0].expression.body.range;\n\n  // Esprima's ranges include the first '{' and the last '}' characters on\n  // function expressions. So cut them out.\n  /*eslint-disable no-new-func*/\n  return new Function(params, source.slice(body[0] + 1, body[1] - 1));\n}\n\nfunction representJavascriptFunction(object /*, style*/) {\n  return object.toString();\n}\n\nfunction isFunction(object) {\n  return '[object Function]' === Object.prototype.toString.call(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:js/function', {\n  kind: 'scalar',\n  resolve: resolveJavascriptFunction,\n  construct: constructJavascriptFunction,\n  predicate: isFunction,\n  represent: representJavascriptFunction\n});\n",
     "'use strict';\n\nvar Type = require('../../type');\n\nfunction resolveJavascriptRegExp(data) {\n  if (null === data) {\n    return false;\n  }\n\n  if (0 === data.length) {\n    return false;\n  }\n\n  var regexp = data,\n      tail   = /\\/([gim]*)$/.exec(data),\n      modifiers = '';\n\n  // if regexp starts with '/' it can have modifiers and must be properly closed\n  // `/foo/gim` - modifiers tail can be maximum 3 chars\n  if ('/' === regexp[0]) {\n    if (tail) {\n      modifiers = tail[1];\n    }\n\n    if (modifiers.length > 3) { return false; }\n    // if expression starts with /, is should be properly terminated\n    if (regexp[regexp.length - modifiers.length - 1] !== '/') { return false; }\n\n    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);\n  }\n\n  try {\n    return true;\n  } catch (error) {\n    return false;\n  }\n}\n\nfunction constructJavascriptRegExp(data) {\n  var regexp = data,\n      tail   = /\\/([gim]*)$/.exec(data),\n      modifiers = '';\n\n  // `/foo/gim` - tail can be maximum 4 chars\n  if ('/' === regexp[0]) {\n    if (tail) {\n      modifiers = tail[1];\n    }\n    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);\n  }\n\n  return new RegExp(regexp, modifiers);\n}\n\nfunction representJavascriptRegExp(object /*, style*/) {\n  var result = '/' + object.source + '/';\n\n  if (object.global) {\n    result += 'g';\n  }\n\n  if (object.multiline) {\n    result += 'm';\n  }\n\n  if (object.ignoreCase) {\n    result += 'i';\n  }\n\n  return result;\n}\n\nfunction isRegExp(object) {\n  return '[object RegExp]' === Object.prototype.toString.call(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:js/regexp', {\n  kind: 'scalar',\n  resolve: resolveJavascriptRegExp,\n  construct: constructJavascriptRegExp,\n  predicate: isRegExp,\n  represent: representJavascriptRegExp\n});\n",
@@ -165,19 +164,19 @@
     "'use strict';\n\nvar Type = require('../type');\n\nmodule.exports = new Type('tag:yaml.org,2002:str', {\n  kind: 'scalar',\n  construct: function (data) { return null !== data ? data : ''; }\n});\n",
     "'use strict';\n\nvar Type = require('../type');\n\nvar YAML_TIMESTAMP_REGEXP = new RegExp(\n  '^([0-9][0-9][0-9][0-9])'          + // [1] year\n  '-([0-9][0-9]?)'                   + // [2] month\n  '-([0-9][0-9]?)'                   + // [3] day\n  '(?:(?:[Tt]|[ \\\\t]+)'              + // ...\n  '([0-9][0-9]?)'                    + // [4] hour\n  ':([0-9][0-9])'                    + // [5] minute\n  ':([0-9][0-9])'                    + // [6] second\n  '(?:\\\\.([0-9]*))?'                 + // [7] fraction\n  '(?:[ \\\\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour\n  '(?::([0-9][0-9]))?))?)?$');         // [11] tz_minute\n\nfunction resolveYamlTimestamp(data) {\n  if (null === data) {\n    return false;\n  }\n\n  if (YAML_TIMESTAMP_REGEXP.exec(data) === null) {\n    return false;\n  }\n\n  return true;\n}\n\nfunction constructYamlTimestamp(data) {\n  var match, year, month, day, hour, minute, second, fraction = 0,\n      delta = null, tz_hour, tz_minute, date;\n\n  match = YAML_TIMESTAMP_REGEXP.exec(data);\n\n  if (null === match) {\n    throw new Error('Date resolve error');\n  }\n\n  // match: [1] year [2] month [3] day\n\n  year = +(match[1]);\n  month = +(match[2]) - 1; // JS month starts with 0\n  day = +(match[3]);\n\n  if (!match[4]) { // no hour\n    return new Date(Date.UTC(year, month, day));\n  }\n\n  // match: [4] hour [5] minute [6] second [7] fraction\n\n  hour = +(match[4]);\n  minute = +(match[5]);\n  second = +(match[6]);\n\n  if (match[7]) {\n    fraction = match[7].slice(0, 3);\n    while (fraction.length < 3) { // milli-seconds\n      fraction += '0';\n    }\n    fraction = +fraction;\n  }\n\n  // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute\n\n  if (match[9]) {\n    tz_hour = +(match[10]);\n    tz_minute = +(match[11] || 0);\n    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds\n    if ('-' === match[9]) {\n      delta = -delta;\n    }\n  }\n\n  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));\n\n  if (delta) {\n    date.setTime(date.getTime() - delta);\n  }\n\n  return date;\n}\n\nfunction representYamlTimestamp(object /*, style*/) {\n  return object.toISOString();\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:timestamp', {\n  kind: 'scalar',\n  resolve: resolveYamlTimestamp,\n  construct: constructYamlTimestamp,\n  instanceOf: Date,\n  represent: representYamlTimestamp\n});\n",
     "/**\n * Helpers.\n */\n\nvar s = 1000;\nvar m = s * 60;\nvar h = m * 60;\nvar d = h * 24;\nvar y = d * 365.25;\n\n/**\n * Parse or format the given `val`.\n *\n * Options:\n *\n *  - `long` verbose formatting [false]\n *\n * @param {String|Number} val\n * @param {Object} options\n * @return {String|Number}\n * @api public\n */\n\nmodule.exports = function(val, options){\n  options = options || {};\n  if ('string' == typeof val) return parse(val);\n  return options.long\n    ? long(val)\n    : short(val);\n};\n\n/**\n * Parse the given `str` and return milliseconds.\n *\n * @param {String} str\n * @return {Number}\n * @api private\n */\n\nfunction parse(str) {\n  str = '' + str;\n  if (str.length > 10000) return;\n  var match = /^((?:\\d+)?\\.?\\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str);\n  if (!match) return;\n  var n = parseFloat(match[1]);\n  var type = (match[2] || 'ms').toLowerCase();\n  switch (type) {\n    case 'years':\n    case 'year':\n    case 'yrs':\n    case 'yr':\n    case 'y':\n      return n * y;\n    case 'days':\n    case 'day':\n    case 'd':\n      return n * d;\n    case 'hours':\n    case 'hour':\n    case 'hrs':\n    case 'hr':\n    case 'h':\n      return n * h;\n    case 'minutes':\n    case 'minute':\n    case 'mins':\n    case 'min':\n    case 'm':\n      return n * m;\n    case 'seconds':\n    case 'second':\n    case 'secs':\n    case 'sec':\n    case 's':\n      return n * s;\n    case 'milliseconds':\n    case 'millisecond':\n    case 'msecs':\n    case 'msec':\n    case 'ms':\n      return n;\n  }\n}\n\n/**\n * Short format for `ms`.\n *\n * @param {Number} ms\n * @return {String}\n * @api private\n */\n\nfunction short(ms) {\n  if (ms >= d) return Math.round(ms / d) + 'd';\n  if (ms >= h) return Math.round(ms / h) + 'h';\n  if (ms >= m) return Math.round(ms / m) + 'm';\n  if (ms >= s) return Math.round(ms / s) + 's';\n  return ms + 'ms';\n}\n\n/**\n * Long format for `ms`.\n *\n * @param {Number} ms\n * @return {String}\n * @api private\n */\n\nfunction long(ms) {\n  return plural(ms, d, 'day')\n    || plural(ms, h, 'hour')\n    || plural(ms, m, 'minute')\n    || plural(ms, s, 'second')\n    || ms + ' ms';\n}\n\n/**\n * Pluralization helper.\n */\n\nfunction plural(ms, n, name) {\n  if (ms < n) return;\n  if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;\n  return Math.ceil(ms / n) + ' ' + name + 's';\n}\n",
-    "/**!\n * Ono v1.0.22\n *\n * @link https://github.com/BigstickCarpet/ono\n * @license MIT\n */\n'use strict';\n\nvar util  = require('util'),\n    slice = Array.prototype.slice;\n\nmodule.exports = create(Error);\nmodule.exports.error = create(Error);\nmodule.exports.eval = create(EvalError);\nmodule.exports.range = create(RangeError);\nmodule.exports.reference = create(ReferenceError);\nmodule.exports.syntax = create(SyntaxError);\nmodule.exports.type = create(TypeError);\nmodule.exports.uri = create(URIError);\nmodule.exports.formatter = util.format;\n\n/**\n * Creates a new {@link ono} function that creates the given Error class.\n *\n * @param {Class} Klass - The Error subclass to create\n * @returns {ono}\n */\nfunction create(Klass) {\n  /**\n   * @param {Error}   [err]     - The original error, if any\n   * @param {object}  [props]   - An object whose properties will be added to the error object\n   * @param {string}  [message] - The error message. May contain {@link util#format} placeholders\n   * @param {...*}    [params]  - Parameters that map to the `message` placeholders\n   * @returns {Error}\n   */\n  return function ono(err, props, message, params) {\n    var formattedMessage, stack;\n    var formatter = module.exports.formatter;\n\n    if (typeof(err) === 'string') {\n      formattedMessage = formatter.apply(null, arguments);\n      err = props = undefined;\n    }\n    else if (typeof(props) === 'string') {\n      formattedMessage = formatter.apply(null, slice.call(arguments, 1));\n    }\n    else {\n      formattedMessage = formatter.apply(null, slice.call(arguments, 2));\n    }\n\n    if (!(err instanceof Error)) {\n      props = err;\n      err = undefined;\n    }\n\n    if (err) {\n      // The inner-error's message and stack will be added to the new error\n      formattedMessage += (formattedMessage ? ' \\n' : '') + err.message;\n      stack = err.stack;\n    }\n\n    var error = new Klass(formattedMessage);\n    extendError(error, stack, props);\n    return error;\n  };\n}\n\n/**\n * Extends the given Error object with the given values\n *\n * @param {Error}   error - The error object to extend\n * @param {?string} stack - The stack trace from the original error\n * @param {?object} props - Properties to add to the error object\n */\nfunction extendError(error, stack, props) {\n  if (stack) {\n    error.stack += ' \\n\\n' + stack;\n  }\n\n  if (props && typeof(props) === 'object') {\n    var keys = Object.keys(props);\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i];\n      error[key] = props[key];\n    }\n  }\n\n  error.toJSON = errorToJSON;\n}\n\n/**\n * Custom JSON serializer for Error objects.\n * Returns all built-in error properties, as well as extended properties.\n *\n * @returns {object}\n */\nfunction errorToJSON() {\n  // jshint -W040\n\n  // All Errors have \"name\" and \"message\"\n  var json = {\n    name: this.name,\n    message: this.message\n  };\n\n  // Append any custom properties that were added\n  var keys = Object.keys(this);\n\n  // Also include any vendor-specific Error properties\n  keys = keys.concat(['description', 'number', 'fileName', 'lineNumber', 'columnNumber', 'stack']);\n\n  for (var i = 0; i < keys.length; i++) {\n    var key = keys[i];\n    var value = this[key];\n    if (value !== undefined) {\n      json[key] = value;\n    }\n  }\n\n  return json;\n}\n",
-    "'use strict';\nmodule.exports = nextTick;\n\nfunction nextTick(fn) {\n  var args = new Array(arguments.length - 1);\n  var i = 0;\n  while (i < args.length) {\n    args[i++] = arguments[i];\n  }\n  process.nextTick(function afterTick() {\n    fn.apply(null, args);\n  });\n}\n",
+    "/**!\n * Ono v2.0.1\n *\n * @link https://github.com/BigstickCarpet/ono\n * @license MIT\n */\n'use strict';\n\nvar util  = require('util'),\n    slice = Array.prototype.slice,\n    vendorSpecificErrorProperties = [\n      'name', 'message', 'description', 'number', 'fileName', 'lineNumber', 'columnNumber',\n      'sourceURL', 'line', 'column', 'stack'\n    ];\n\nmodule.exports = create(Error);\nmodule.exports.error = create(Error);\nmodule.exports.eval = create(EvalError);\nmodule.exports.range = create(RangeError);\nmodule.exports.reference = create(ReferenceError);\nmodule.exports.syntax = create(SyntaxError);\nmodule.exports.type = create(TypeError);\nmodule.exports.uri = create(URIError);\nmodule.exports.formatter = util.format;\n\n/**\n * Creates a new {@link ono} function that creates the given Error class.\n *\n * @param {Class} Klass - The Error subclass to create\n * @returns {ono}\n */\nfunction create(Klass) {\n  /**\n   * @param {Error}   [err]     - The original error, if any\n   * @param {object}  [props]   - An object whose properties will be added to the error object\n   * @param {string}  [message] - The error message. May contain {@link util#format} placeholders\n   * @param {...*}    [params]  - Parameters that map to the `message` placeholders\n   * @returns {Error}\n   */\n  return function ono(err, props, message, params) {\n    var formattedMessage, stack;\n    var formatter = module.exports.formatter;\n\n    if (typeof(err) === 'string') {\n      formattedMessage = formatter.apply(null, arguments);\n      err = props = undefined;\n    }\n    else if (typeof(props) === 'string') {\n      formattedMessage = formatter.apply(null, slice.call(arguments, 1));\n    }\n    else {\n      formattedMessage = formatter.apply(null, slice.call(arguments, 2));\n    }\n\n    if (!(err instanceof Error)) {\n      props = err;\n      err = undefined;\n    }\n\n    if (err) {\n      // The inner-error's message will be added to the new message\n      formattedMessage += (formattedMessage ? ' \\n' : '') + err.message;\n    }\n\n    // Create the new error\n    // NOTE: DON'T move this to a separate function! We don't want to pollute the stack trace\n    var newError = new Klass(formattedMessage);\n\n    // Extend the new error with the additional properties\n    extendError(newError, err);   // Copy properties of the original error\n    extendToJSON(newError);       // Replace the original toJSON method\n    extend(newError, props);      // Copy custom properties, possibly including a custom toJSON method\n\n    return newError;\n  };\n}\n\n/**\n * Extends the targetError with the properties of the source error.\n *\n * @param {Error}   targetError - The error object to extend\n * @param {?Error}  sourceError - The source error object, if any\n */\nfunction extendError(targetError, sourceError) {\n  if (sourceError) {\n    var stack = sourceError.stack;\n    if (stack) {\n      targetError.stack += ' \\n\\n' + sourceError.stack;\n    }\n\n    extend(targetError, sourceError, true);\n  }\n}\n\n/**\n * JavaScript engines differ in how errors are serialized to JSON - especially when it comes\n * to custom error properties and stack traces.  So we add our own toJSON method that ALWAYS\n * outputs every property of the error.\n */\nfunction extendToJSON(error) {\n  error.toJSON = errorToJSON;\n\n  // Also add an inspect() method, for compatibility with Node.js' `util.inspect()` method\n  error.inspect = errorToJSON;\n}\n\n/**\n * Extends the target object with the properties of the source object.\n *\n * @param {object}  target - The object to extend\n * @param {?source} source - The object whose properties are copied\n * @param {boolean} omitVendorSpecificProperties - Skip vendor-specific Error properties\n */\nfunction extend(target, source, omitVendorSpecificProperties) {\n  if (source && typeof(source) === 'object') {\n    var keys = Object.keys(source);\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i];\n\n      // Don't bother trying to copy read-only vendor-specific Error properties\n      if (omitVendorSpecificProperties && vendorSpecificErrorProperties.indexOf(key) >= 0) {\n        continue;\n      }\n\n      try {\n        target[key] = source[key];\n      }\n      catch (e) {\n        // This property is read-only, so it can't be copied\n      }\n    }\n  }\n}\n\n/**\n * Custom JSON serializer for Error objects.\n * Returns all built-in error properties, as well as extended properties.\n *\n * @returns {object}\n */\nfunction errorToJSON() {\n  // jshint -W040\n  var json = {};\n\n  // Get all the properties of this error\n  var keys = Object.keys(this);\n\n  // Also include vendor-specific properties from the prototype\n  keys = keys.concat(vendorSpecificErrorProperties);\n\n  for (var i = 0; i < keys.length; i++) {\n    var key = keys[i];\n    var value = this[key];\n    if (value !== undefined) {\n      json[key] = value;\n    }\n  }\n\n  return json;\n}\n",
+    "'use strict';\n\nif (!process.version ||\n    process.version.indexOf('v0.') === 0 ||\n    process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {\n  module.exports = nextTick;\n} else {\n  module.exports = process.nextTick;\n}\n\nfunction nextTick(fn) {\n  var args = new Array(arguments.length - 1);\n  var i = 0;\n  while (i < args.length) {\n    args[i++] = arguments[i];\n  }\n  process.nextTick(function afterTick() {\n    fn.apply(null, args);\n  });\n}\n",
     "// shim for using process in browser\n\nvar process = module.exports = {};\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = setTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    clearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        setTimeout(drainQueue, 0);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n",
-    "/*! https://mths.be/punycode v1.3.2 by @mathias */\n;(function(root) {\n\n\t/** Detect free variables */\n\tvar freeExports = typeof exports == 'object' && exports &&\n\t\t!exports.nodeType && exports;\n\tvar freeModule = typeof module == 'object' && module &&\n\t\t!module.nodeType && module;\n\tvar freeGlobal = typeof global == 'object' && global;\n\tif (\n\t\tfreeGlobal.global === freeGlobal ||\n\t\tfreeGlobal.window === freeGlobal ||\n\t\tfreeGlobal.self === freeGlobal\n\t) {\n\t\troot = freeGlobal;\n\t}\n\n\t/**\n\t * The `punycode` object.\n\t * @name punycode\n\t * @type Object\n\t */\n\tvar punycode,\n\n\t/** Highest positive signed 32-bit float value */\n\tmaxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1\n\n\t/** Bootstring parameters */\n\tbase = 36,\n\ttMin = 1,\n\ttMax = 26,\n\tskew = 38,\n\tdamp = 700,\n\tinitialBias = 72,\n\tinitialN = 128, // 0x80\n\tdelimiter = '-', // '\\x2D'\n\n\t/** Regular expressions */\n\tregexPunycode = /^xn--/,\n\tregexNonASCII = /[^\\x20-\\x7E]/, // unprintable ASCII chars + non-ASCII chars\n\tregexSeparators = /[\\x2E\\u3002\\uFF0E\\uFF61]/g, // RFC 3490 separators\n\n\t/** Error messages */\n\terrors = {\n\t\t'overflow': 'Overflow: input needs wider integers to process',\n\t\t'not-basic': 'Illegal input >= 0x80 (not a basic code point)',\n\t\t'invalid-input': 'Invalid input'\n\t},\n\n\t/** Convenience shortcuts */\n\tbaseMinusTMin = base - tMin,\n\tfloor = Math.floor,\n\tstringFromCharCode = String.fromCharCode,\n\n\t/** Temporary variable */\n\tkey;\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/**\n\t * A generic error utility function.\n\t * @private\n\t * @param {String} type The error type.\n\t * @returns {Error} Throws a `RangeError` with the applicable error message.\n\t */\n\tfunction error(type) {\n\t\tthrow RangeError(errors[type]);\n\t}\n\n\t/**\n\t * A generic `Array#map` utility function.\n\t * @private\n\t * @param {Array} array The array to iterate over.\n\t * @param {Function} callback The function that gets called for every array\n\t * item.\n\t * @returns {Array} A new array of values returned by the callback function.\n\t */\n\tfunction map(array, fn) {\n\t\tvar length = array.length;\n\t\tvar result = [];\n\t\twhile (length--) {\n\t\t\tresult[length] = fn(array[length]);\n\t\t}\n\t\treturn result;\n\t}\n\n\t/**\n\t * A simple `Array#map`-like wrapper to work with domain name strings or email\n\t * addresses.\n\t * @private\n\t * @param {String} domain The domain name or email address.\n\t * @param {Function} callback The function that gets called for every\n\t * character.\n\t * @returns {Array} A new string of characters returned by the callback\n\t * function.\n\t */\n\tfunction mapDomain(string, fn) {\n\t\tvar parts = string.split('@');\n\t\tvar result = '';\n\t\tif (parts.length > 1) {\n\t\t\t// In email addresses, only the domain name should be punycoded. Leave\n\t\t\t// the local part (i.e. everything up to `@`) intact.\n\t\t\tresult = parts[0] + '@';\n\t\t\tstring = parts[1];\n\t\t}\n\t\t// Avoid `split(regex)` for IE8 compatibility. See #17.\n\t\tstring = string.replace(regexSeparators, '\\x2E');\n\t\tvar labels = string.split('.');\n\t\tvar encoded = map(labels, fn).join('.');\n\t\treturn result + encoded;\n\t}\n\n\t/**\n\t * Creates an array containing the numeric code points of each Unicode\n\t * character in the string. While JavaScript uses UCS-2 internally,\n\t * this function will convert a pair of surrogate halves (each of which\n\t * UCS-2 exposes as separate characters) into a single code point,\n\t * matching UTF-16.\n\t * @see `punycode.ucs2.encode`\n\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t * @memberOf punycode.ucs2\n\t * @name decode\n\t * @param {String} string The Unicode input string (UCS-2).\n\t * @returns {Array} The new array of code points.\n\t */\n\tfunction ucs2decode(string) {\n\t\tvar output = [],\n\t\t    counter = 0,\n\t\t    length = string.length,\n\t\t    value,\n\t\t    extra;\n\t\twhile (counter < length) {\n\t\t\tvalue = string.charCodeAt(counter++);\n\t\t\tif (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n\t\t\t\t// high surrogate, and there is a next character\n\t\t\t\textra = string.charCodeAt(counter++);\n\t\t\t\tif ((extra & 0xFC00) == 0xDC00) { // low surrogate\n\t\t\t\t\toutput.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n\t\t\t\t} else {\n\t\t\t\t\t// unmatched surrogate; only append this code unit, in case the next\n\t\t\t\t\t// code unit is the high surrogate of a surrogate pair\n\t\t\t\t\toutput.push(value);\n\t\t\t\t\tcounter--;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\toutput.push(value);\n\t\t\t}\n\t\t}\n\t\treturn output;\n\t}\n\n\t/**\n\t * Creates a string based on an array of numeric code points.\n\t * @see `punycode.ucs2.decode`\n\t * @memberOf punycode.ucs2\n\t * @name encode\n\t * @param {Array} codePoints The array of numeric code points.\n\t * @returns {String} The new Unicode string (UCS-2).\n\t */\n\tfunction ucs2encode(array) {\n\t\treturn map(array, function(value) {\n\t\t\tvar output = '';\n\t\t\tif (value > 0xFFFF) {\n\t\t\t\tvalue -= 0x10000;\n\t\t\t\toutput += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);\n\t\t\t\tvalue = 0xDC00 | value & 0x3FF;\n\t\t\t}\n\t\t\toutput += stringFromCharCode(value);\n\t\t\treturn output;\n\t\t}).join('');\n\t}\n\n\t/**\n\t * Converts a basic code point into a digit/integer.\n\t * @see `digitToBasic()`\n\t * @private\n\t * @param {Number} codePoint The basic numeric code point value.\n\t * @returns {Number} The numeric value of a basic code point (for use in\n\t * representing integers) in the range `0` to `base - 1`, or `base` if\n\t * the code point does not represent a value.\n\t */\n\tfunction basicToDigit(codePoint) {\n\t\tif (codePoint - 48 < 10) {\n\t\t\treturn codePoint - 22;\n\t\t}\n\t\tif (codePoint - 65 < 26) {\n\t\t\treturn codePoint - 65;\n\t\t}\n\t\tif (codePoint - 97 < 26) {\n\t\t\treturn codePoint - 97;\n\t\t}\n\t\treturn base;\n\t}\n\n\t/**\n\t * Converts a digit/integer into a basic code point.\n\t * @see `basicToDigit()`\n\t * @private\n\t * @param {Number} digit The numeric value of a basic code point.\n\t * @returns {Number} The basic code point whose value (when used for\n\t * representing integers) is `digit`, which needs to be in the range\n\t * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is\n\t * used; else, the lowercase form is used. The behavior is undefined\n\t * if `flag` is non-zero and `digit` has no uppercase form.\n\t */\n\tfunction digitToBasic(digit, flag) {\n\t\t//  0..25 map to ASCII a..z or A..Z\n\t\t// 26..35 map to ASCII 0..9\n\t\treturn digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);\n\t}\n\n\t/**\n\t * Bias adaptation function as per section 3.4 of RFC 3492.\n\t * http://tools.ietf.org/html/rfc3492#section-3.4\n\t * @private\n\t */\n\tfunction adapt(delta, numPoints, firstTime) {\n\t\tvar k = 0;\n\t\tdelta = firstTime ? floor(delta / damp) : delta >> 1;\n\t\tdelta += floor(delta / numPoints);\n\t\tfor (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {\n\t\t\tdelta = floor(delta / baseMinusTMin);\n\t\t}\n\t\treturn floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n\t}\n\n\t/**\n\t * Converts a Punycode string of ASCII-only symbols to a string of Unicode\n\t * symbols.\n\t * @memberOf punycode\n\t * @param {String} input The Punycode string of ASCII-only symbols.\n\t * @returns {String} The resulting string of Unicode symbols.\n\t */\n\tfunction decode(input) {\n\t\t// Don't use UCS-2\n\t\tvar output = [],\n\t\t    inputLength = input.length,\n\t\t    out,\n\t\t    i = 0,\n\t\t    n = initialN,\n\t\t    bias = initialBias,\n\t\t    basic,\n\t\t    j,\n\t\t    index,\n\t\t    oldi,\n\t\t    w,\n\t\t    k,\n\t\t    digit,\n\t\t    t,\n\t\t    /** Cached calculation results */\n\t\t    baseMinusT;\n\n\t\t// Handle the basic code points: let `basic` be the number of input code\n\t\t// points before the last delimiter, or `0` if there is none, then copy\n\t\t// the first basic code points to the output.\n\n\t\tbasic = input.lastIndexOf(delimiter);\n\t\tif (basic < 0) {\n\t\t\tbasic = 0;\n\t\t}\n\n\t\tfor (j = 0; j < basic; ++j) {\n\t\t\t// if it's not a basic code point\n\t\t\tif (input.charCodeAt(j) >= 0x80) {\n\t\t\t\terror('not-basic');\n\t\t\t}\n\t\t\toutput.push(input.charCodeAt(j));\n\t\t}\n\n\t\t// Main decoding loop: start just after the last delimiter if any basic code\n\t\t// points were copied; start at the beginning otherwise.\n\n\t\tfor (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {\n\n\t\t\t// `index` is the index of the next character to be consumed.\n\t\t\t// Decode a generalized variable-length integer into `delta`,\n\t\t\t// which gets added to `i`. The overflow checking is easier\n\t\t\t// if we increase `i` as we go, then subtract off its starting\n\t\t\t// value at the end to obtain `delta`.\n\t\t\tfor (oldi = i, w = 1, k = base; /* no condition */; k += base) {\n\n\t\t\t\tif (index >= inputLength) {\n\t\t\t\t\terror('invalid-input');\n\t\t\t\t}\n\n\t\t\t\tdigit = basicToDigit(input.charCodeAt(index++));\n\n\t\t\t\tif (digit >= base || digit > floor((maxInt - i) / w)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\ti += digit * w;\n\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\n\t\t\t\tif (digit < t) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tbaseMinusT = base - t;\n\t\t\t\tif (w > floor(maxInt / baseMinusT)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tw *= baseMinusT;\n\n\t\t\t}\n\n\t\t\tout = output.length + 1;\n\t\t\tbias = adapt(i - oldi, out, oldi == 0);\n\n\t\t\t// `i` was supposed to wrap around from `out` to `0`,\n\t\t\t// incrementing `n` each time, so we'll fix that now:\n\t\t\tif (floor(i / out) > maxInt - n) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tn += floor(i / out);\n\t\t\ti %= out;\n\n\t\t\t// Insert `n` at position `i` of the output\n\t\t\toutput.splice(i++, 0, n);\n\n\t\t}\n\n\t\treturn ucs2encode(output);\n\t}\n\n\t/**\n\t * Converts a string of Unicode symbols (e.g. a domain name label) to a\n\t * Punycode string of ASCII-only symbols.\n\t * @memberOf punycode\n\t * @param {String} input The string of Unicode symbols.\n\t * @returns {String} The resulting Punycode string of ASCII-only symbols.\n\t */\n\tfunction encode(input) {\n\t\tvar n,\n\t\t    delta,\n\t\t    handledCPCount,\n\t\t    basicLength,\n\t\t    bias,\n\t\t    j,\n\t\t    m,\n\t\t    q,\n\t\t    k,\n\t\t    t,\n\t\t    currentValue,\n\t\t    output = [],\n\t\t    /** `inputLength` will hold the number of code points in `input`. */\n\t\t    inputLength,\n\t\t    /** Cached calculation results */\n\t\t    handledCPCountPlusOne,\n\t\t    baseMinusT,\n\t\t    qMinusT;\n\n\t\t// Convert the input in UCS-2 to Unicode\n\t\tinput = ucs2decode(input);\n\n\t\t// Cache the length\n\t\tinputLength = input.length;\n\n\t\t// Initialize the state\n\t\tn = initialN;\n\t\tdelta = 0;\n\t\tbias = initialBias;\n\n\t\t// Handle the basic code points\n\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\tcurrentValue = input[j];\n\t\t\tif (currentValue < 0x80) {\n\t\t\t\toutput.push(stringFromCharCode(currentValue));\n\t\t\t}\n\t\t}\n\n\t\thandledCPCount = basicLength = output.length;\n\n\t\t// `handledCPCount` is the number of code points that have been handled;\n\t\t// `basicLength` is the number of basic code points.\n\n\t\t// Finish the basic string - if it is not empty - with a delimiter\n\t\tif (basicLength) {\n\t\t\toutput.push(delimiter);\n\t\t}\n\n\t\t// Main encoding loop:\n\t\twhile (handledCPCount < inputLength) {\n\n\t\t\t// All non-basic code points < n have been handled already. Find the next\n\t\t\t// larger one:\n\t\t\tfor (m = maxInt, j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\t\t\t\tif (currentValue >= n && currentValue < m) {\n\t\t\t\t\tm = currentValue;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,\n\t\t\t// but guard against overflow\n\t\t\thandledCPCountPlusOne = handledCPCount + 1;\n\t\t\tif (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tdelta += (m - n) * handledCPCountPlusOne;\n\t\t\tn = m;\n\n\t\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\n\t\t\t\tif (currentValue < n && ++delta > maxInt) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tif (currentValue == n) {\n\t\t\t\t\t// Represent delta as a generalized variable-length integer\n\t\t\t\t\tfor (q = delta, k = base; /* no condition */; k += base) {\n\t\t\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\t\t\t\t\t\tif (q < t) {\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tqMinusT = q - t;\n\t\t\t\t\t\tbaseMinusT = base - t;\n\t\t\t\t\t\toutput.push(\n\t\t\t\t\t\t\tstringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))\n\t\t\t\t\t\t);\n\t\t\t\t\t\tq = floor(qMinusT / baseMinusT);\n\t\t\t\t\t}\n\n\t\t\t\t\toutput.push(stringFromCharCode(digitToBasic(q, 0)));\n\t\t\t\t\tbias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n\t\t\t\t\tdelta = 0;\n\t\t\t\t\t++handledCPCount;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t++delta;\n\t\t\t++n;\n\n\t\t}\n\t\treturn output.join('');\n\t}\n\n\t/**\n\t * Converts a Punycode string representing a domain name or an email address\n\t * to Unicode. Only the Punycoded parts of the input will be converted, i.e.\n\t * it doesn't matter if you call it on a string that has already been\n\t * converted to Unicode.\n\t * @memberOf punycode\n\t * @param {String} input The Punycoded domain name or email address to\n\t * convert to Unicode.\n\t * @returns {String} The Unicode representation of the given Punycode\n\t * string.\n\t */\n\tfunction toUnicode(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexPunycode.test(string)\n\t\t\t\t? decode(string.slice(4).toLowerCase())\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/**\n\t * Converts a Unicode string representing a domain name or an email address to\n\t * Punycode. Only the non-ASCII parts of the domain name will be converted,\n\t * i.e. it doesn't matter if you call it with a domain that's already in\n\t * ASCII.\n\t * @memberOf punycode\n\t * @param {String} input The domain name or email address to convert, as a\n\t * Unicode string.\n\t * @returns {String} The Punycode representation of the given domain name or\n\t * email address.\n\t */\n\tfunction toASCII(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexNonASCII.test(string)\n\t\t\t\t? 'xn--' + encode(string)\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/** Define the public API */\n\tpunycode = {\n\t\t/**\n\t\t * A string representing the current Punycode.js version number.\n\t\t * @memberOf punycode\n\t\t * @type String\n\t\t */\n\t\t'version': '1.3.2',\n\t\t/**\n\t\t * An object of methods to convert from JavaScript's internal character\n\t\t * representation (UCS-2) to Unicode code points, and back.\n\t\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t\t * @memberOf punycode\n\t\t * @type Object\n\t\t */\n\t\t'ucs2': {\n\t\t\t'decode': ucs2decode,\n\t\t\t'encode': ucs2encode\n\t\t},\n\t\t'decode': decode,\n\t\t'encode': encode,\n\t\t'toASCII': toASCII,\n\t\t'toUnicode': toUnicode\n\t};\n\n\t/** Expose `punycode` */\n\t// Some AMD build optimizers, like r.js, check for specific condition patterns\n\t// like the following:\n\tif (\n\t\ttypeof define == 'function' &&\n\t\ttypeof define.amd == 'object' &&\n\t\tdefine.amd\n\t) {\n\t\tdefine('punycode', function() {\n\t\t\treturn punycode;\n\t\t});\n\t} else if (freeExports && freeModule) {\n\t\tif (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+\n\t\t\tfreeModule.exports = punycode;\n\t\t} else { // in Narwhal or RingoJS v0.7.0-\n\t\t\tfor (key in punycode) {\n\t\t\t\tpunycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);\n\t\t\t}\n\t\t}\n\t} else { // in Rhino or a web browser\n\t\troot.punycode = punycode;\n\t}\n\n}(this));\n",
+    "/*! https://mths.be/punycode v1.4.0 by @mathias */\n;(function(root) {\n\n\t/** Detect free variables */\n\tvar freeExports = typeof exports == 'object' && exports &&\n\t\t!exports.nodeType && exports;\n\tvar freeModule = typeof module == 'object' && module &&\n\t\t!module.nodeType && module;\n\tvar freeGlobal = typeof global == 'object' && global;\n\tif (\n\t\tfreeGlobal.global === freeGlobal ||\n\t\tfreeGlobal.window === freeGlobal ||\n\t\tfreeGlobal.self === freeGlobal\n\t) {\n\t\troot = freeGlobal;\n\t}\n\n\t/**\n\t * The `punycode` object.\n\t * @name punycode\n\t * @type Object\n\t */\n\tvar punycode,\n\n\t/** Highest positive signed 32-bit float value */\n\tmaxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1\n\n\t/** Bootstring parameters */\n\tbase = 36,\n\ttMin = 1,\n\ttMax = 26,\n\tskew = 38,\n\tdamp = 700,\n\tinitialBias = 72,\n\tinitialN = 128, // 0x80\n\tdelimiter = '-', // '\\x2D'\n\n\t/** Regular expressions */\n\tregexPunycode = /^xn--/,\n\tregexNonASCII = /[^\\x20-\\x7E]/, // unprintable ASCII chars + non-ASCII chars\n\tregexSeparators = /[\\x2E\\u3002\\uFF0E\\uFF61]/g, // RFC 3490 separators\n\n\t/** Error messages */\n\terrors = {\n\t\t'overflow': 'Overflow: input needs wider integers to process',\n\t\t'not-basic': 'Illegal input >= 0x80 (not a basic code point)',\n\t\t'invalid-input': 'Invalid input'\n\t},\n\n\t/** Convenience shortcuts */\n\tbaseMinusTMin = base - tMin,\n\tfloor = Math.floor,\n\tstringFromCharCode = String.fromCharCode,\n\n\t/** Temporary variable */\n\tkey;\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/**\n\t * A generic error utility function.\n\t * @private\n\t * @param {String} type The error type.\n\t * @returns {Error} Throws a `RangeError` with the applicable error message.\n\t */\n\tfunction error(type) {\n\t\tthrow new RangeError(errors[type]);\n\t}\n\n\t/**\n\t * A generic `Array#map` utility function.\n\t * @private\n\t * @param {Array} array The array to iterate over.\n\t * @param {Function} callback The function that gets called for every array\n\t * item.\n\t * @returns {Array} A new array of values returned by the callback function.\n\t */\n\tfunction map(array, fn) {\n\t\tvar length = array.length;\n\t\tvar result = [];\n\t\twhile (length--) {\n\t\t\tresult[length] = fn(array[length]);\n\t\t}\n\t\treturn result;\n\t}\n\n\t/**\n\t * A simple `Array#map`-like wrapper to work with domain name strings or email\n\t * addresses.\n\t * @private\n\t * @param {String} domain The domain name or email address.\n\t * @param {Function} callback The function that gets called for every\n\t * character.\n\t * @returns {Array} A new string of characters returned by the callback\n\t * function.\n\t */\n\tfunction mapDomain(string, fn) {\n\t\tvar parts = string.split('@');\n\t\tvar result = '';\n\t\tif (parts.length > 1) {\n\t\t\t// In email addresses, only the domain name should be punycoded. Leave\n\t\t\t// the local part (i.e. everything up to `@`) intact.\n\t\t\tresult = parts[0] + '@';\n\t\t\tstring = parts[1];\n\t\t}\n\t\t// Avoid `split(regex)` for IE8 compatibility. See #17.\n\t\tstring = string.replace(regexSeparators, '\\x2E');\n\t\tvar labels = string.split('.');\n\t\tvar encoded = map(labels, fn).join('.');\n\t\treturn result + encoded;\n\t}\n\n\t/**\n\t * Creates an array containing the numeric code points of each Unicode\n\t * character in the string. While JavaScript uses UCS-2 internally,\n\t * this function will convert a pair of surrogate halves (each of which\n\t * UCS-2 exposes as separate characters) into a single code point,\n\t * matching UTF-16.\n\t * @see `punycode.ucs2.encode`\n\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t * @memberOf punycode.ucs2\n\t * @name decode\n\t * @param {String} string The Unicode input string (UCS-2).\n\t * @returns {Array} The new array of code points.\n\t */\n\tfunction ucs2decode(string) {\n\t\tvar output = [],\n\t\t    counter = 0,\n\t\t    length = string.length,\n\t\t    value,\n\t\t    extra;\n\t\twhile (counter < length) {\n\t\t\tvalue = string.charCodeAt(counter++);\n\t\t\tif (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n\t\t\t\t// high surrogate, and there is a next character\n\t\t\t\textra = string.charCodeAt(counter++);\n\t\t\t\tif ((extra & 0xFC00) == 0xDC00) { // low surrogate\n\t\t\t\t\toutput.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n\t\t\t\t} else {\n\t\t\t\t\t// unmatched surrogate; only append this code unit, in case the next\n\t\t\t\t\t// code unit is the high surrogate of a surrogate pair\n\t\t\t\t\toutput.push(value);\n\t\t\t\t\tcounter--;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\toutput.push(value);\n\t\t\t}\n\t\t}\n\t\treturn output;\n\t}\n\n\t/**\n\t * Creates a string based on an array of numeric code points.\n\t * @see `punycode.ucs2.decode`\n\t * @memberOf punycode.ucs2\n\t * @name encode\n\t * @param {Array} codePoints The array of numeric code points.\n\t * @returns {String} The new Unicode string (UCS-2).\n\t */\n\tfunction ucs2encode(array) {\n\t\treturn map(array, function(value) {\n\t\t\tvar output = '';\n\t\t\tif (value > 0xFFFF) {\n\t\t\t\tvalue -= 0x10000;\n\t\t\t\toutput += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);\n\t\t\t\tvalue = 0xDC00 | value & 0x3FF;\n\t\t\t}\n\t\t\toutput += stringFromCharCode(value);\n\t\t\treturn output;\n\t\t}).join('');\n\t}\n\n\t/**\n\t * Converts a basic code point into a digit/integer.\n\t * @see `digitToBasic()`\n\t * @private\n\t * @param {Number} codePoint The basic numeric code point value.\n\t * @returns {Number} The numeric value of a basic code point (for use in\n\t * representing integers) in the range `0` to `base - 1`, or `base` if\n\t * the code point does not represent a value.\n\t */\n\tfunction basicToDigit(codePoint) {\n\t\tif (codePoint - 48 < 10) {\n\t\t\treturn codePoint - 22;\n\t\t}\n\t\tif (codePoint - 65 < 26) {\n\t\t\treturn codePoint - 65;\n\t\t}\n\t\tif (codePoint - 97 < 26) {\n\t\t\treturn codePoint - 97;\n\t\t}\n\t\treturn base;\n\t}\n\n\t/**\n\t * Converts a digit/integer into a basic code point.\n\t * @see `basicToDigit()`\n\t * @private\n\t * @param {Number} digit The numeric value of a basic code point.\n\t * @returns {Number} The basic code point whose value (when used for\n\t * representing integers) is `digit`, which needs to be in the range\n\t * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is\n\t * used; else, the lowercase form is used. The behavior is undefined\n\t * if `flag` is non-zero and `digit` has no uppercase form.\n\t */\n\tfunction digitToBasic(digit, flag) {\n\t\t//  0..25 map to ASCII a..z or A..Z\n\t\t// 26..35 map to ASCII 0..9\n\t\treturn digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);\n\t}\n\n\t/**\n\t * Bias adaptation function as per section 3.4 of RFC 3492.\n\t * https://tools.ietf.org/html/rfc3492#section-3.4\n\t * @private\n\t */\n\tfunction adapt(delta, numPoints, firstTime) {\n\t\tvar k = 0;\n\t\tdelta = firstTime ? floor(delta / damp) : delta >> 1;\n\t\tdelta += floor(delta / numPoints);\n\t\tfor (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {\n\t\t\tdelta = floor(delta / baseMinusTMin);\n\t\t}\n\t\treturn floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n\t}\n\n\t/**\n\t * Converts a Punycode string of ASCII-only symbols to a string of Unicode\n\t * symbols.\n\t * @memberOf punycode\n\t * @param {String} input The Punycode string of ASCII-only symbols.\n\t * @returns {String} The resulting string of Unicode symbols.\n\t */\n\tfunction decode(input) {\n\t\t// Don't use UCS-2\n\t\tvar output = [],\n\t\t    inputLength = input.length,\n\t\t    out,\n\t\t    i = 0,\n\t\t    n = initialN,\n\t\t    bias = initialBias,\n\t\t    basic,\n\t\t    j,\n\t\t    index,\n\t\t    oldi,\n\t\t    w,\n\t\t    k,\n\t\t    digit,\n\t\t    t,\n\t\t    /** Cached calculation results */\n\t\t    baseMinusT;\n\n\t\t// Handle the basic code points: let `basic` be the number of input code\n\t\t// points before the last delimiter, or `0` if there is none, then copy\n\t\t// the first basic code points to the output.\n\n\t\tbasic = input.lastIndexOf(delimiter);\n\t\tif (basic < 0) {\n\t\t\tbasic = 0;\n\t\t}\n\n\t\tfor (j = 0; j < basic; ++j) {\n\t\t\t// if it's not a basic code point\n\t\t\tif (input.charCodeAt(j) >= 0x80) {\n\t\t\t\terror('not-basic');\n\t\t\t}\n\t\t\toutput.push(input.charCodeAt(j));\n\t\t}\n\n\t\t// Main decoding loop: start just after the last delimiter if any basic code\n\t\t// points were copied; start at the beginning otherwise.\n\n\t\tfor (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {\n\n\t\t\t// `index` is the index of the next character to be consumed.\n\t\t\t// Decode a generalized variable-length integer into `delta`,\n\t\t\t// which gets added to `i`. The overflow checking is easier\n\t\t\t// if we increase `i` as we go, then subtract off its starting\n\t\t\t// value at the end to obtain `delta`.\n\t\t\tfor (oldi = i, w = 1, k = base; /* no condition */; k += base) {\n\n\t\t\t\tif (index >= inputLength) {\n\t\t\t\t\terror('invalid-input');\n\t\t\t\t}\n\n\t\t\t\tdigit = basicToDigit(input.charCodeAt(index++));\n\n\t\t\t\tif (digit >= base || digit > floor((maxInt - i) / w)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\ti += digit * w;\n\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\n\t\t\t\tif (digit < t) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tbaseMinusT = base - t;\n\t\t\t\tif (w > floor(maxInt / baseMinusT)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tw *= baseMinusT;\n\n\t\t\t}\n\n\t\t\tout = output.length + 1;\n\t\t\tbias = adapt(i - oldi, out, oldi == 0);\n\n\t\t\t// `i` was supposed to wrap around from `out` to `0`,\n\t\t\t// incrementing `n` each time, so we'll fix that now:\n\t\t\tif (floor(i / out) > maxInt - n) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tn += floor(i / out);\n\t\t\ti %= out;\n\n\t\t\t// Insert `n` at position `i` of the output\n\t\t\toutput.splice(i++, 0, n);\n\n\t\t}\n\n\t\treturn ucs2encode(output);\n\t}\n\n\t/**\n\t * Converts a string of Unicode symbols (e.g. a domain name label) to a\n\t * Punycode string of ASCII-only symbols.\n\t * @memberOf punycode\n\t * @param {String} input The string of Unicode symbols.\n\t * @returns {String} The resulting Punycode string of ASCII-only symbols.\n\t */\n\tfunction encode(input) {\n\t\tvar n,\n\t\t    delta,\n\t\t    handledCPCount,\n\t\t    basicLength,\n\t\t    bias,\n\t\t    j,\n\t\t    m,\n\t\t    q,\n\t\t    k,\n\t\t    t,\n\t\t    currentValue,\n\t\t    output = [],\n\t\t    /** `inputLength` will hold the number of code points in `input`. */\n\t\t    inputLength,\n\t\t    /** Cached calculation results */\n\t\t    handledCPCountPlusOne,\n\t\t    baseMinusT,\n\t\t    qMinusT;\n\n\t\t// Convert the input in UCS-2 to Unicode\n\t\tinput = ucs2decode(input);\n\n\t\t// Cache the length\n\t\tinputLength = input.length;\n\n\t\t// Initialize the state\n\t\tn = initialN;\n\t\tdelta = 0;\n\t\tbias = initialBias;\n\n\t\t// Handle the basic code points\n\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\tcurrentValue = input[j];\n\t\t\tif (currentValue < 0x80) {\n\t\t\t\toutput.push(stringFromCharCode(currentValue));\n\t\t\t}\n\t\t}\n\n\t\thandledCPCount = basicLength = output.length;\n\n\t\t// `handledCPCount` is the number of code points that have been handled;\n\t\t// `basicLength` is the number of basic code points.\n\n\t\t// Finish the basic string - if it is not empty - with a delimiter\n\t\tif (basicLength) {\n\t\t\toutput.push(delimiter);\n\t\t}\n\n\t\t// Main encoding loop:\n\t\twhile (handledCPCount < inputLength) {\n\n\t\t\t// All non-basic code points < n have been handled already. Find the next\n\t\t\t// larger one:\n\t\t\tfor (m = maxInt, j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\t\t\t\tif (currentValue >= n && currentValue < m) {\n\t\t\t\t\tm = currentValue;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,\n\t\t\t// but guard against overflow\n\t\t\thandledCPCountPlusOne = handledCPCount + 1;\n\t\t\tif (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tdelta += (m - n) * handledCPCountPlusOne;\n\t\t\tn = m;\n\n\t\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\n\t\t\t\tif (currentValue < n && ++delta > maxInt) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tif (currentValue == n) {\n\t\t\t\t\t// Represent delta as a generalized variable-length integer\n\t\t\t\t\tfor (q = delta, k = base; /* no condition */; k += base) {\n\t\t\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\t\t\t\t\t\tif (q < t) {\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tqMinusT = q - t;\n\t\t\t\t\t\tbaseMinusT = base - t;\n\t\t\t\t\t\toutput.push(\n\t\t\t\t\t\t\tstringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))\n\t\t\t\t\t\t);\n\t\t\t\t\t\tq = floor(qMinusT / baseMinusT);\n\t\t\t\t\t}\n\n\t\t\t\t\toutput.push(stringFromCharCode(digitToBasic(q, 0)));\n\t\t\t\t\tbias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n\t\t\t\t\tdelta = 0;\n\t\t\t\t\t++handledCPCount;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t++delta;\n\t\t\t++n;\n\n\t\t}\n\t\treturn output.join('');\n\t}\n\n\t/**\n\t * Converts a Punycode string representing a domain name or an email address\n\t * to Unicode. Only the Punycoded parts of the input will be converted, i.e.\n\t * it doesn't matter if you call it on a string that has already been\n\t * converted to Unicode.\n\t * @memberOf punycode\n\t * @param {String} input The Punycoded domain name or email address to\n\t * convert to Unicode.\n\t * @returns {String} The Unicode representation of the given Punycode\n\t * string.\n\t */\n\tfunction toUnicode(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexPunycode.test(string)\n\t\t\t\t? decode(string.slice(4).toLowerCase())\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/**\n\t * Converts a Unicode string representing a domain name or an email address to\n\t * Punycode. Only the non-ASCII parts of the domain name will be converted,\n\t * i.e. it doesn't matter if you call it with a domain that's already in\n\t * ASCII.\n\t * @memberOf punycode\n\t * @param {String} input The domain name or email address to convert, as a\n\t * Unicode string.\n\t * @returns {String} The Punycode representation of the given domain name or\n\t * email address.\n\t */\n\tfunction toASCII(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexNonASCII.test(string)\n\t\t\t\t? 'xn--' + encode(string)\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/** Define the public API */\n\tpunycode = {\n\t\t/**\n\t\t * A string representing the current Punycode.js version number.\n\t\t * @memberOf punycode\n\t\t * @type String\n\t\t */\n\t\t'version': '1.3.2',\n\t\t/**\n\t\t * An object of methods to convert from JavaScript's internal character\n\t\t * representation (UCS-2) to Unicode code points, and back.\n\t\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t\t * @memberOf punycode\n\t\t * @type Object\n\t\t */\n\t\t'ucs2': {\n\t\t\t'decode': ucs2decode,\n\t\t\t'encode': ucs2encode\n\t\t},\n\t\t'decode': decode,\n\t\t'encode': encode,\n\t\t'toASCII': toASCII,\n\t\t'toUnicode': toUnicode\n\t};\n\n\t/** Expose `punycode` */\n\t// Some AMD build optimizers, like r.js, check for specific condition patterns\n\t// like the following:\n\tif (\n\t\ttypeof define == 'function' &&\n\t\ttypeof define.amd == 'object' &&\n\t\tdefine.amd\n\t) {\n\t\tdefine('punycode', function() {\n\t\t\treturn punycode;\n\t\t});\n\t} else if (freeExports && freeModule) {\n\t\tif (module.exports == freeExports) {\n\t\t\t// in Node.js, io.js, or RingoJS v0.8.0+\n\t\t\tfreeModule.exports = punycode;\n\t\t} else {\n\t\t\t// in Narwhal or RingoJS v0.7.0-\n\t\t\tfor (key in punycode) {\n\t\t\t\tpunycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);\n\t\t\t}\n\t\t}\n\t} else {\n\t\t// in Rhino or a web browser\n\t\troot.punycode = punycode;\n\t}\n\n}(this));\n",
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\n// If obj.hasOwnProperty has been overridden, then calling\n// obj.hasOwnProperty(prop) will break.\n// See: https://github.com/joyent/node/issues/1707\nfunction hasOwnProperty(obj, prop) {\n  return Object.prototype.hasOwnProperty.call(obj, prop);\n}\n\nmodule.exports = function(qs, sep, eq, options) {\n  sep = sep || '&';\n  eq = eq || '=';\n  var obj = {};\n\n  if (typeof qs !== 'string' || qs.length === 0) {\n    return obj;\n  }\n\n  var regexp = /\\+/g;\n  qs = qs.split(sep);\n\n  var maxKeys = 1000;\n  if (options && typeof options.maxKeys === 'number') {\n    maxKeys = options.maxKeys;\n  }\n\n  var len = qs.length;\n  // maxKeys <= 0 means that we should not limit keys count\n  if (maxKeys > 0 && len > maxKeys) {\n    len = maxKeys;\n  }\n\n  for (var i = 0; i < len; ++i) {\n    var x = qs[i].replace(regexp, '%20'),\n        idx = x.indexOf(eq),\n        kstr, vstr, k, v;\n\n    if (idx >= 0) {\n      kstr = x.substr(0, idx);\n      vstr = x.substr(idx + 1);\n    } else {\n      kstr = x;\n      vstr = '';\n    }\n\n    k = decodeURIComponent(kstr);\n    v = decodeURIComponent(vstr);\n\n    if (!hasOwnProperty(obj, k)) {\n      obj[k] = v;\n    } else if (isArray(obj[k])) {\n      obj[k].push(v);\n    } else {\n      obj[k] = [obj[k], v];\n    }\n  }\n\n  return obj;\n};\n\nvar isArray = Array.isArray || function (xs) {\n  return Object.prototype.toString.call(xs) === '[object Array]';\n};\n",
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\nvar stringifyPrimitive = function(v) {\n  switch (typeof v) {\n    case 'string':\n      return v;\n\n    case 'boolean':\n      return v ? 'true' : 'false';\n\n    case 'number':\n      return isFinite(v) ? v : '';\n\n    default:\n      return '';\n  }\n};\n\nmodule.exports = function(obj, sep, eq, name) {\n  sep = sep || '&';\n  eq = eq || '=';\n  if (obj === null) {\n    obj = undefined;\n  }\n\n  if (typeof obj === 'object') {\n    return map(objectKeys(obj), function(k) {\n      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;\n      if (isArray(obj[k])) {\n        return map(obj[k], function(v) {\n          return ks + encodeURIComponent(stringifyPrimitive(v));\n        }).join(sep);\n      } else {\n        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));\n      }\n    }).join(sep);\n\n  }\n\n  if (!name) return '';\n  return encodeURIComponent(stringifyPrimitive(name)) + eq +\n         encodeURIComponent(stringifyPrimitive(obj));\n};\n\nvar isArray = Array.isArray || function (xs) {\n  return Object.prototype.toString.call(xs) === '[object Array]';\n};\n\nfunction map (xs, f) {\n  if (xs.map) return xs.map(f);\n  var res = [];\n  for (var i = 0; i < xs.length; i++) {\n    res.push(f(xs[i], i));\n  }\n  return res;\n}\n\nvar objectKeys = Object.keys || function (obj) {\n  var res = [];\n  for (var key in obj) {\n    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);\n  }\n  return res;\n};\n",
     "'use strict';\n\nexports.decode = exports.parse = require('./decode');\nexports.encode = exports.stringify = require('./encode');\n",
     "module.exports = require(\"./lib/_stream_duplex.js\")\n",
     "// a duplex stream is just a stream that is both readable and writable.\n// Since JS doesn't have multiple prototypal inheritance, this class\n// prototypally inherits from Readable, and then parasitically from\n// Writable.\n\n'use strict';\n\n/*<replacement>*/\nvar objectKeys = Object.keys || function (obj) {\n  var keys = [];\n  for (var key in obj) keys.push(key);\n  return keys;\n}\n/*</replacement>*/\n\n\nmodule.exports = Duplex;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nvar Readable = require('./_stream_readable');\nvar Writable = require('./_stream_writable');\n\nutil.inherits(Duplex, Readable);\n\nvar keys = objectKeys(Writable.prototype);\nfor (var v = 0; v < keys.length; v++) {\n  var method = keys[v];\n  if (!Duplex.prototype[method])\n    Duplex.prototype[method] = Writable.prototype[method];\n}\n\nfunction Duplex(options) {\n  if (!(this instanceof Duplex))\n    return new Duplex(options);\n\n  Readable.call(this, options);\n  Writable.call(this, options);\n\n  if (options && options.readable === false)\n    this.readable = false;\n\n  if (options && options.writable === false)\n    this.writable = false;\n\n  this.allowHalfOpen = true;\n  if (options && options.allowHalfOpen === false)\n    this.allowHalfOpen = false;\n\n  this.once('end', onend);\n}\n\n// the no-half-open enforcer\nfunction onend() {\n  // if we allow half-open state, or if the writable side ended,\n  // then we're ok.\n  if (this.allowHalfOpen || this._writableState.ended)\n    return;\n\n  // no more data can be written.\n  // But allow more writes to happen in this tick.\n  processNextTick(onEndNT, this);\n}\n\nfunction onEndNT(self) {\n  self.end();\n}\n\nfunction forEach (xs, f) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    f(xs[i], i);\n  }\n}\n",
     "// a passthrough stream.\n// basically just the most minimal sort of Transform stream.\n// Every written chunk gets output as-is.\n\n'use strict';\n\nmodule.exports = PassThrough;\n\nvar Transform = require('./_stream_transform');\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nutil.inherits(PassThrough, Transform);\n\nfunction PassThrough(options) {\n  if (!(this instanceof PassThrough))\n    return new PassThrough(options);\n\n  Transform.call(this, options);\n}\n\nPassThrough.prototype._transform = function(chunk, encoding, cb) {\n  cb(null, chunk);\n};\n",
-    "'use strict';\n\nmodule.exports = Readable;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar isArray = require('isarray');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar Buffer = require('buffer').Buffer;\n/*</replacement>*/\n\nReadable.ReadableState = ReadableState;\n\nvar EE = require('events');\n\n/*<replacement>*/\nvar EElistenerCount = function(emitter, type) {\n  return emitter.listeners(type).length;\n};\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar Stream;\n(function (){try{\n  Stream = require('st' + 'ream');\n}catch(_){}finally{\n  if (!Stream)\n    Stream = require('events').EventEmitter;\n}}())\n/*</replacement>*/\n\nvar Buffer = require('buffer').Buffer;\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar debugUtil = require('util');\nvar debug;\nif (debugUtil && debugUtil.debuglog) {\n  debug = debugUtil.debuglog('stream');\n} else {\n  debug = function () {};\n}\n/*</replacement>*/\n\nvar StringDecoder;\n\nutil.inherits(Readable, Stream);\n\nfunction ReadableState(options, stream) {\n  var Duplex = require('./_stream_duplex');\n\n  options = options || {};\n\n  // object stream flag. Used to make read(n) ignore n and to\n  // make all the buffer merging and length checks go away\n  this.objectMode = !!options.objectMode;\n\n  if (stream instanceof Duplex)\n    this.objectMode = this.objectMode || !!options.readableObjectMode;\n\n  // the point at which it stops calling _read() to fill the buffer\n  // Note: 0 is a valid value, means \"don't call _read preemptively ever\"\n  var hwm = options.highWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = ~~this.highWaterMark;\n\n  this.buffer = [];\n  this.length = 0;\n  this.pipes = null;\n  this.pipesCount = 0;\n  this.flowing = null;\n  this.ended = false;\n  this.endEmitted = false;\n  this.reading = false;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // whenever we return null, then we set a flag to say\n  // that we're awaiting a 'readable' event emission.\n  this.needReadable = false;\n  this.emittedReadable = false;\n  this.readableListening = false;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // when piping, we only care about 'readable' events that happen\n  // after read()ing all the bytes and not getting any pushback.\n  this.ranOut = false;\n\n  // the number of writers that are awaiting a drain event in .pipe()s\n  this.awaitDrain = 0;\n\n  // if true, a maybeReadMore has been scheduled\n  this.readingMore = false;\n\n  this.decoder = null;\n  this.encoding = null;\n  if (options.encoding) {\n    if (!StringDecoder)\n      StringDecoder = require('string_decoder/').StringDecoder;\n    this.decoder = new StringDecoder(options.encoding);\n    this.encoding = options.encoding;\n  }\n}\n\nfunction Readable(options) {\n  var Duplex = require('./_stream_duplex');\n\n  if (!(this instanceof Readable))\n    return new Readable(options);\n\n  this._readableState = new ReadableState(options, this);\n\n  // legacy\n  this.readable = true;\n\n  if (options && typeof options.read === 'function')\n    this._read = options.read;\n\n  Stream.call(this);\n}\n\n// Manually shove something into the read() buffer.\n// This returns true if the highWaterMark has not been hit yet,\n// similar to how Writable.write() returns true if you should\n// write() some more.\nReadable.prototype.push = function(chunk, encoding) {\n  var state = this._readableState;\n\n  if (!state.objectMode && typeof chunk === 'string') {\n    encoding = encoding || state.defaultEncoding;\n    if (encoding !== state.encoding) {\n      chunk = new Buffer(chunk, encoding);\n      encoding = '';\n    }\n  }\n\n  return readableAddChunk(this, state, chunk, encoding, false);\n};\n\n// Unshift should *always* be something directly out of read()\nReadable.prototype.unshift = function(chunk) {\n  var state = this._readableState;\n  return readableAddChunk(this, state, chunk, '', true);\n};\n\nReadable.prototype.isPaused = function() {\n  return this._readableState.flowing === false;\n};\n\nfunction readableAddChunk(stream, state, chunk, encoding, addToFront) {\n  var er = chunkInvalid(state, chunk);\n  if (er) {\n    stream.emit('error', er);\n  } else if (chunk === null) {\n    state.reading = false;\n    onEofChunk(stream, state);\n  } else if (state.objectMode || chunk && chunk.length > 0) {\n    if (state.ended && !addToFront) {\n      var e = new Error('stream.push() after EOF');\n      stream.emit('error', e);\n    } else if (state.endEmitted && addToFront) {\n      var e = new Error('stream.unshift() after end event');\n      stream.emit('error', e);\n    } else {\n      if (state.decoder && !addToFront && !encoding)\n        chunk = state.decoder.write(chunk);\n\n      if (!addToFront)\n        state.reading = false;\n\n      // if we want the data now, just emit it.\n      if (state.flowing && state.length === 0 && !state.sync) {\n        stream.emit('data', chunk);\n        stream.read(0);\n      } else {\n        // update the buffer info.\n        state.length += state.objectMode ? 1 : chunk.length;\n        if (addToFront)\n          state.buffer.unshift(chunk);\n        else\n          state.buffer.push(chunk);\n\n        if (state.needReadable)\n          emitReadable(stream);\n      }\n\n      maybeReadMore(stream, state);\n    }\n  } else if (!addToFront) {\n    state.reading = false;\n  }\n\n  return needMoreData(state);\n}\n\n\n// if it's past the high water mark, we can push in some more.\n// Also, if we have no data yet, we can stand some\n// more bytes.  This is to work around cases where hwm=0,\n// such as the repl.  Also, if the push() triggered a\n// readable event, and the user called read(largeNumber) such that\n// needReadable was set, then we ought to push more, so that another\n// 'readable' event will be triggered.\nfunction needMoreData(state) {\n  return !state.ended &&\n         (state.needReadable ||\n          state.length < state.highWaterMark ||\n          state.length === 0);\n}\n\n// backwards compatibility.\nReadable.prototype.setEncoding = function(enc) {\n  if (!StringDecoder)\n    StringDecoder = require('string_decoder/').StringDecoder;\n  this._readableState.decoder = new StringDecoder(enc);\n  this._readableState.encoding = enc;\n  return this;\n};\n\n// Don't raise the hwm > 8MB\nvar MAX_HWM = 0x800000;\nfunction computeNewHighWaterMark(n) {\n  if (n >= MAX_HWM) {\n    n = MAX_HWM;\n  } else {\n    // Get the next highest power of 2\n    n--;\n    n |= n >>> 1;\n    n |= n >>> 2;\n    n |= n >>> 4;\n    n |= n >>> 8;\n    n |= n >>> 16;\n    n++;\n  }\n  return n;\n}\n\nfunction howMuchToRead(n, state) {\n  if (state.length === 0 && state.ended)\n    return 0;\n\n  if (state.objectMode)\n    return n === 0 ? 0 : 1;\n\n  if (n === null || isNaN(n)) {\n    // only flow one buffer at a time\n    if (state.flowing && state.buffer.length)\n      return state.buffer[0].length;\n    else\n      return state.length;\n  }\n\n  if (n <= 0)\n    return 0;\n\n  // If we're asking for more than the target buffer level,\n  // then raise the water mark.  Bump up to the next highest\n  // power of 2, to prevent increasing it excessively in tiny\n  // amounts.\n  if (n > state.highWaterMark)\n    state.highWaterMark = computeNewHighWaterMark(n);\n\n  // don't have that much.  return null, unless we've ended.\n  if (n > state.length) {\n    if (!state.ended) {\n      state.needReadable = true;\n      return 0;\n    } else {\n      return state.length;\n    }\n  }\n\n  return n;\n}\n\n// you can override either this method, or the async _read(n) below.\nReadable.prototype.read = function(n) {\n  debug('read', n);\n  var state = this._readableState;\n  var nOrig = n;\n\n  if (typeof n !== 'number' || n > 0)\n    state.emittedReadable = false;\n\n  // if we're doing read(0) to trigger a readable event, but we\n  // already have a bunch of data in the buffer, then just trigger\n  // the 'readable' event and move on.\n  if (n === 0 &&\n      state.needReadable &&\n      (state.length >= state.highWaterMark || state.ended)) {\n    debug('read: emitReadable', state.length, state.ended);\n    if (state.length === 0 && state.ended)\n      endReadable(this);\n    else\n      emitReadable(this);\n    return null;\n  }\n\n  n = howMuchToRead(n, state);\n\n  // if we've ended, and we're now clear, then finish it up.\n  if (n === 0 && state.ended) {\n    if (state.length === 0)\n      endReadable(this);\n    return null;\n  }\n\n  // All the actual chunk generation logic needs to be\n  // *below* the call to _read.  The reason is that in certain\n  // synthetic stream cases, such as passthrough streams, _read\n  // may be a completely synchronous operation which may change\n  // the state of the read buffer, providing enough data when\n  // before there was *not* enough.\n  //\n  // So, the steps are:\n  // 1. Figure out what the state of things will be after we do\n  // a read from the buffer.\n  //\n  // 2. If that resulting state will trigger a _read, then call _read.\n  // Note that this may be asynchronous, or synchronous.  Yes, it is\n  // deeply ugly to write APIs this way, but that still doesn't mean\n  // that the Readable class should behave improperly, as streams are\n  // designed to be sync/async agnostic.\n  // Take note if the _read call is sync or async (ie, if the read call\n  // has returned yet), so that we know whether or not it's safe to emit\n  // 'readable' etc.\n  //\n  // 3. Actually pull the requested chunks out of the buffer and return.\n\n  // if we need a readable event, then we need to do some reading.\n  var doRead = state.needReadable;\n  debug('need readable', doRead);\n\n  // if we currently have less than the highWaterMark, then also read some\n  if (state.length === 0 || state.length - n < state.highWaterMark) {\n    doRead = true;\n    debug('length less than watermark', doRead);\n  }\n\n  // however, if we've ended, then there's no point, and if we're already\n  // reading, then it's unnecessary.\n  if (state.ended || state.reading) {\n    doRead = false;\n    debug('reading or ended', doRead);\n  }\n\n  if (doRead) {\n    debug('do read');\n    state.reading = true;\n    state.sync = true;\n    // if the length is currently zero, then we *need* a readable event.\n    if (state.length === 0)\n      state.needReadable = true;\n    // call internal read method\n    this._read(state.highWaterMark);\n    state.sync = false;\n  }\n\n  // If _read pushed data synchronously, then `reading` will be false,\n  // and we need to re-evaluate how much data we can return to the user.\n  if (doRead && !state.reading)\n    n = howMuchToRead(nOrig, state);\n\n  var ret;\n  if (n > 0)\n    ret = fromList(n, state);\n  else\n    ret = null;\n\n  if (ret === null) {\n    state.needReadable = true;\n    n = 0;\n  }\n\n  state.length -= n;\n\n  // If we have nothing in the buffer, then we want to know\n  // as soon as we *do* get something into the buffer.\n  if (state.length === 0 && !state.ended)\n    state.needReadable = true;\n\n  // If we tried to read() past the EOF, then emit end on the next tick.\n  if (nOrig !== n && state.ended && state.length === 0)\n    endReadable(this);\n\n  if (ret !== null)\n    this.emit('data', ret);\n\n  return ret;\n};\n\nfunction chunkInvalid(state, chunk) {\n  var er = null;\n  if (!(Buffer.isBuffer(chunk)) &&\n      typeof chunk !== 'string' &&\n      chunk !== null &&\n      chunk !== undefined &&\n      !state.objectMode) {\n    er = new TypeError('Invalid non-string/buffer chunk');\n  }\n  return er;\n}\n\n\nfunction onEofChunk(stream, state) {\n  if (state.ended) return;\n  if (state.decoder) {\n    var chunk = state.decoder.end();\n    if (chunk && chunk.length) {\n      state.buffer.push(chunk);\n      state.length += state.objectMode ? 1 : chunk.length;\n    }\n  }\n  state.ended = true;\n\n  // emit 'readable' now to make sure it gets picked up.\n  emitReadable(stream);\n}\n\n// Don't emit readable right away in sync mode, because this can trigger\n// another read() call => stack overflow.  This way, it might trigger\n// a nextTick recursion warning, but that's not so bad.\nfunction emitReadable(stream) {\n  var state = stream._readableState;\n  state.needReadable = false;\n  if (!state.emittedReadable) {\n    debug('emitReadable', state.flowing);\n    state.emittedReadable = true;\n    if (state.sync)\n      processNextTick(emitReadable_, stream);\n    else\n      emitReadable_(stream);\n  }\n}\n\nfunction emitReadable_(stream) {\n  debug('emit readable');\n  stream.emit('readable');\n  flow(stream);\n}\n\n\n// at this point, the user has presumably seen the 'readable' event,\n// and called read() to consume some data.  that may have triggered\n// in turn another _read(n) call, in which case reading = true if\n// it's in progress.\n// However, if we're not ended, or reading, and the length < hwm,\n// then go ahead and try to read some more preemptively.\nfunction maybeReadMore(stream, state) {\n  if (!state.readingMore) {\n    state.readingMore = true;\n    processNextTick(maybeReadMore_, stream, state);\n  }\n}\n\nfunction maybeReadMore_(stream, state) {\n  var len = state.length;\n  while (!state.reading && !state.flowing && !state.ended &&\n         state.length < state.highWaterMark) {\n    debug('maybeReadMore read 0');\n    stream.read(0);\n    if (len === state.length)\n      // didn't get any data, stop spinning.\n      break;\n    else\n      len = state.length;\n  }\n  state.readingMore = false;\n}\n\n// abstract method.  to be overridden in specific implementation classes.\n// call cb(er, data) where data is <= n in length.\n// for virtual (non-string, non-buffer) streams, \"length\" is somewhat\n// arbitrary, and perhaps not very meaningful.\nReadable.prototype._read = function(n) {\n  this.emit('error', new Error('not implemented'));\n};\n\nReadable.prototype.pipe = function(dest, pipeOpts) {\n  var src = this;\n  var state = this._readableState;\n\n  switch (state.pipesCount) {\n    case 0:\n      state.pipes = dest;\n      break;\n    case 1:\n      state.pipes = [state.pipes, dest];\n      break;\n    default:\n      state.pipes.push(dest);\n      break;\n  }\n  state.pipesCount += 1;\n  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);\n\n  var doEnd = (!pipeOpts || pipeOpts.end !== false) &&\n              dest !== process.stdout &&\n              dest !== process.stderr;\n\n  var endFn = doEnd ? onend : cleanup;\n  if (state.endEmitted)\n    processNextTick(endFn);\n  else\n    src.once('end', endFn);\n\n  dest.on('unpipe', onunpipe);\n  function onunpipe(readable) {\n    debug('onunpipe');\n    if (readable === src) {\n      cleanup();\n    }\n  }\n\n  function onend() {\n    debug('onend');\n    dest.end();\n  }\n\n  // when the dest drains, it reduces the awaitDrain counter\n  // on the source.  This would be more elegant with a .once()\n  // handler in flow(), but adding and removing repeatedly is\n  // too slow.\n  var ondrain = pipeOnDrain(src);\n  dest.on('drain', ondrain);\n\n  var cleanedUp = false;\n  function cleanup() {\n    debug('cleanup');\n    // cleanup event handlers once the pipe is broken\n    dest.removeListener('close', onclose);\n    dest.removeListener('finish', onfinish);\n    dest.removeListener('drain', ondrain);\n    dest.removeListener('error', onerror);\n    dest.removeListener('unpipe', onunpipe);\n    src.removeListener('end', onend);\n    src.removeListener('end', cleanup);\n    src.removeListener('data', ondata);\n\n    cleanedUp = true;\n\n    // if the reader is waiting for a drain event from this\n    // specific writer, then it would cause it to never start\n    // flowing again.\n    // So, if this is awaiting a drain, then we just call it now.\n    // If we don't know, then assume that we are waiting for one.\n    if (state.awaitDrain &&\n        (!dest._writableState || dest._writableState.needDrain))\n      ondrain();\n  }\n\n  src.on('data', ondata);\n  function ondata(chunk) {\n    debug('ondata');\n    var ret = dest.write(chunk);\n    if (false === ret) {\n      // If the user unpiped during `dest.write()`, it is possible\n      // to get stuck in a permanently paused state if that write\n      // also returned false.\n      if (state.pipesCount === 1 &&\n          state.pipes[0] === dest &&\n          src.listenerCount('data') === 1 &&\n          !cleanedUp) {\n        debug('false write response, pause', src._readableState.awaitDrain);\n        src._readableState.awaitDrain++;\n      }\n      src.pause();\n    }\n  }\n\n  // if the dest has an error, then stop piping into it.\n  // however, don't suppress the throwing behavior for this.\n  function onerror(er) {\n    debug('onerror', er);\n    unpipe();\n    dest.removeListener('error', onerror);\n    if (EElistenerCount(dest, 'error') === 0)\n      dest.emit('error', er);\n  }\n  // This is a brutally ugly hack to make sure that our error handler\n  // is attached before any userland ones.  NEVER DO THIS.\n  if (!dest._events || !dest._events.error)\n    dest.on('error', onerror);\n  else if (isArray(dest._events.error))\n    dest._events.error.unshift(onerror);\n  else\n    dest._events.error = [onerror, dest._events.error];\n\n\n  // Both close and finish should trigger unpipe, but only once.\n  function onclose() {\n    dest.removeListener('finish', onfinish);\n    unpipe();\n  }\n  dest.once('close', onclose);\n  function onfinish() {\n    debug('onfinish');\n    dest.removeListener('close', onclose);\n    unpipe();\n  }\n  dest.once('finish', onfinish);\n\n  function unpipe() {\n    debug('unpipe');\n    src.unpipe(dest);\n  }\n\n  // tell the dest that it's being piped to\n  dest.emit('pipe', src);\n\n  // start the flow if it hasn't been started already.\n  if (!state.flowing) {\n    debug('pipe resume');\n    src.resume();\n  }\n\n  return dest;\n};\n\nfunction pipeOnDrain(src) {\n  return function() {\n    var state = src._readableState;\n    debug('pipeOnDrain', state.awaitDrain);\n    if (state.awaitDrain)\n      state.awaitDrain--;\n    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {\n      state.flowing = true;\n      flow(src);\n    }\n  };\n}\n\n\nReadable.prototype.unpipe = function(dest) {\n  var state = this._readableState;\n\n  // if we're not piping anywhere, then do nothing.\n  if (state.pipesCount === 0)\n    return this;\n\n  // just one destination.  most common case.\n  if (state.pipesCount === 1) {\n    // passed in one, but it's not the right one.\n    if (dest && dest !== state.pipes)\n      return this;\n\n    if (!dest)\n      dest = state.pipes;\n\n    // got a match.\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n    if (dest)\n      dest.emit('unpipe', this);\n    return this;\n  }\n\n  // slow case. multiple pipe destinations.\n\n  if (!dest) {\n    // remove all.\n    var dests = state.pipes;\n    var len = state.pipesCount;\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n\n    for (var i = 0; i < len; i++)\n      dests[i].emit('unpipe', this);\n    return this;\n  }\n\n  // try to find the right one.\n  var i = indexOf(state.pipes, dest);\n  if (i === -1)\n    return this;\n\n  state.pipes.splice(i, 1);\n  state.pipesCount -= 1;\n  if (state.pipesCount === 1)\n    state.pipes = state.pipes[0];\n\n  dest.emit('unpipe', this);\n\n  return this;\n};\n\n// set up data events if they are asked for\n// Ensure readable listeners eventually get something\nReadable.prototype.on = function(ev, fn) {\n  var res = Stream.prototype.on.call(this, ev, fn);\n\n  // If listening to data, and it has not explicitly been paused,\n  // then call resume to start the flow of data on the next tick.\n  if (ev === 'data' && false !== this._readableState.flowing) {\n    this.resume();\n  }\n\n  if (ev === 'readable' && this.readable) {\n    var state = this._readableState;\n    if (!state.readableListening) {\n      state.readableListening = true;\n      state.emittedReadable = false;\n      state.needReadable = true;\n      if (!state.reading) {\n        processNextTick(nReadingNextTick, this);\n      } else if (state.length) {\n        emitReadable(this, state);\n      }\n    }\n  }\n\n  return res;\n};\nReadable.prototype.addListener = Readable.prototype.on;\n\nfunction nReadingNextTick(self) {\n  debug('readable nexttick read 0');\n  self.read(0);\n}\n\n// pause() and resume() are remnants of the legacy readable stream API\n// If the user uses them, then switch into old mode.\nReadable.prototype.resume = function() {\n  var state = this._readableState;\n  if (!state.flowing) {\n    debug('resume');\n    state.flowing = true;\n    resume(this, state);\n  }\n  return this;\n};\n\nfunction resume(stream, state) {\n  if (!state.resumeScheduled) {\n    state.resumeScheduled = true;\n    processNextTick(resume_, stream, state);\n  }\n}\n\nfunction resume_(stream, state) {\n  if (!state.reading) {\n    debug('resume read 0');\n    stream.read(0);\n  }\n\n  state.resumeScheduled = false;\n  stream.emit('resume');\n  flow(stream);\n  if (state.flowing && !state.reading)\n    stream.read(0);\n}\n\nReadable.prototype.pause = function() {\n  debug('call pause flowing=%j', this._readableState.flowing);\n  if (false !== this._readableState.flowing) {\n    debug('pause');\n    this._readableState.flowing = false;\n    this.emit('pause');\n  }\n  return this;\n};\n\nfunction flow(stream) {\n  var state = stream._readableState;\n  debug('flow', state.flowing);\n  if (state.flowing) {\n    do {\n      var chunk = stream.read();\n    } while (null !== chunk && state.flowing);\n  }\n}\n\n// wrap an old-style stream as the async data source.\n// This is *not* part of the readable stream interface.\n// It is an ugly unfortunate mess of history.\nReadable.prototype.wrap = function(stream) {\n  var state = this._readableState;\n  var paused = false;\n\n  var self = this;\n  stream.on('end', function() {\n    debug('wrapped end');\n    if (state.decoder && !state.ended) {\n      var chunk = state.decoder.end();\n      if (chunk && chunk.length)\n        self.push(chunk);\n    }\n\n    self.push(null);\n  });\n\n  stream.on('data', function(chunk) {\n    debug('wrapped data');\n    if (state.decoder)\n      chunk = state.decoder.write(chunk);\n\n    // don't skip over falsy values in objectMode\n    if (state.objectMode && (chunk === null || chunk === undefined))\n      return;\n    else if (!state.objectMode && (!chunk || !chunk.length))\n      return;\n\n    var ret = self.push(chunk);\n    if (!ret) {\n      paused = true;\n      stream.pause();\n    }\n  });\n\n  // proxy all the other methods.\n  // important when wrapping filters and duplexes.\n  for (var i in stream) {\n    if (this[i] === undefined && typeof stream[i] === 'function') {\n      this[i] = function(method) { return function() {\n        return stream[method].apply(stream, arguments);\n      }; }(i);\n    }\n  }\n\n  // proxy certain important events.\n  var events = ['error', 'close', 'destroy', 'pause', 'resume'];\n  forEach(events, function(ev) {\n    stream.on(ev, self.emit.bind(self, ev));\n  });\n\n  // when we try to consume some more bytes, simply unpause the\n  // underlying stream.\n  self._read = function(n) {\n    debug('wrapped _read', n);\n    if (paused) {\n      paused = false;\n      stream.resume();\n    }\n  };\n\n  return self;\n};\n\n\n// exposed for testing purposes only.\nReadable._fromList = fromList;\n\n// Pluck off n bytes from an array of buffers.\n// Length is the combined lengths of all the buffers in the list.\nfunction fromList(n, state) {\n  var list = state.buffer;\n  var length = state.length;\n  var stringMode = !!state.decoder;\n  var objectMode = !!state.objectMode;\n  var ret;\n\n  // nothing in the list, definitely empty.\n  if (list.length === 0)\n    return null;\n\n  if (length === 0)\n    ret = null;\n  else if (objectMode)\n    ret = list.shift();\n  else if (!n || n >= length) {\n    // read it all, truncate the array.\n    if (stringMode)\n      ret = list.join('');\n    else if (list.length === 1)\n      ret = list[0];\n    else\n      ret = Buffer.concat(list, length);\n    list.length = 0;\n  } else {\n    // read just some of it.\n    if (n < list[0].length) {\n      // just take a part of the first list item.\n      // slice is the same for buffers and strings.\n      var buf = list[0];\n      ret = buf.slice(0, n);\n      list[0] = buf.slice(n);\n    } else if (n === list[0].length) {\n      // first list is a perfect match\n      ret = list.shift();\n    } else {\n      // complex case.\n      // we have enough to cover it, but it spans past the first buffer.\n      if (stringMode)\n        ret = '';\n      else\n        ret = new Buffer(n);\n\n      var c = 0;\n      for (var i = 0, l = list.length; i < l && c < n; i++) {\n        var buf = list[0];\n        var cpy = Math.min(n - c, buf.length);\n\n        if (stringMode)\n          ret += buf.slice(0, cpy);\n        else\n          buf.copy(ret, c, 0, cpy);\n\n        if (cpy < buf.length)\n          list[0] = buf.slice(cpy);\n        else\n          list.shift();\n\n        c += cpy;\n      }\n    }\n  }\n\n  return ret;\n}\n\nfunction endReadable(stream) {\n  var state = stream._readableState;\n\n  // If we get here before consuming all the bytes, then that is a\n  // bug in node.  Should never happen.\n  if (state.length > 0)\n    throw new Error('endReadable called on non-empty stream');\n\n  if (!state.endEmitted) {\n    state.ended = true;\n    processNextTick(endReadableNT, state, stream);\n  }\n}\n\nfunction endReadableNT(state, stream) {\n  // Check that we didn't get one last unshift.\n  if (!state.endEmitted && state.length === 0) {\n    state.endEmitted = true;\n    stream.readable = false;\n    stream.emit('end');\n  }\n}\n\nfunction forEach (xs, f) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    f(xs[i], i);\n  }\n}\n\nfunction indexOf (xs, x) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    if (xs[i] === x) return i;\n  }\n  return -1;\n}\n",
+    "'use strict';\n\nmodule.exports = Readable;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar isArray = require('isarray');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar Buffer = require('buffer').Buffer;\n/*</replacement>*/\n\nReadable.ReadableState = ReadableState;\n\nvar EE = require('events');\n\n/*<replacement>*/\nvar EElistenerCount = function(emitter, type) {\n  return emitter.listeners(type).length;\n};\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar Stream;\n(function (){try{\n  Stream = require('st' + 'ream');\n}catch(_){}finally{\n  if (!Stream)\n    Stream = require('events').EventEmitter;\n}}())\n/*</replacement>*/\n\nvar Buffer = require('buffer').Buffer;\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar debugUtil = require('util');\nvar debug;\nif (debugUtil && debugUtil.debuglog) {\n  debug = debugUtil.debuglog('stream');\n} else {\n  debug = function () {};\n}\n/*</replacement>*/\n\nvar StringDecoder;\n\nutil.inherits(Readable, Stream);\n\nvar Duplex;\nfunction ReadableState(options, stream) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  options = options || {};\n\n  // object stream flag. Used to make read(n) ignore n and to\n  // make all the buffer merging and length checks go away\n  this.objectMode = !!options.objectMode;\n\n  if (stream instanceof Duplex)\n    this.objectMode = this.objectMode || !!options.readableObjectMode;\n\n  // the point at which it stops calling _read() to fill the buffer\n  // Note: 0 is a valid value, means \"don't call _read preemptively ever\"\n  var hwm = options.highWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = ~~this.highWaterMark;\n\n  this.buffer = [];\n  this.length = 0;\n  this.pipes = null;\n  this.pipesCount = 0;\n  this.flowing = null;\n  this.ended = false;\n  this.endEmitted = false;\n  this.reading = false;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // whenever we return null, then we set a flag to say\n  // that we're awaiting a 'readable' event emission.\n  this.needReadable = false;\n  this.emittedReadable = false;\n  this.readableListening = false;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // when piping, we only care about 'readable' events that happen\n  // after read()ing all the bytes and not getting any pushback.\n  this.ranOut = false;\n\n  // the number of writers that are awaiting a drain event in .pipe()s\n  this.awaitDrain = 0;\n\n  // if true, a maybeReadMore has been scheduled\n  this.readingMore = false;\n\n  this.decoder = null;\n  this.encoding = null;\n  if (options.encoding) {\n    if (!StringDecoder)\n      StringDecoder = require('string_decoder/').StringDecoder;\n    this.decoder = new StringDecoder(options.encoding);\n    this.encoding = options.encoding;\n  }\n}\n\nvar Duplex;\nfunction Readable(options) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  if (!(this instanceof Readable))\n    return new Readable(options);\n\n  this._readableState = new ReadableState(options, this);\n\n  // legacy\n  this.readable = true;\n\n  if (options && typeof options.read === 'function')\n    this._read = options.read;\n\n  Stream.call(this);\n}\n\n// Manually shove something into the read() buffer.\n// This returns true if the highWaterMark has not been hit yet,\n// similar to how Writable.write() returns true if you should\n// write() some more.\nReadable.prototype.push = function(chunk, encoding) {\n  var state = this._readableState;\n\n  if (!state.objectMode && typeof chunk === 'string') {\n    encoding = encoding || state.defaultEncoding;\n    if (encoding !== state.encoding) {\n      chunk = new Buffer(chunk, encoding);\n      encoding = '';\n    }\n  }\n\n  return readableAddChunk(this, state, chunk, encoding, false);\n};\n\n// Unshift should *always* be something directly out of read()\nReadable.prototype.unshift = function(chunk) {\n  var state = this._readableState;\n  return readableAddChunk(this, state, chunk, '', true);\n};\n\nReadable.prototype.isPaused = function() {\n  return this._readableState.flowing === false;\n};\n\nfunction readableAddChunk(stream, state, chunk, encoding, addToFront) {\n  var er = chunkInvalid(state, chunk);\n  if (er) {\n    stream.emit('error', er);\n  } else if (chunk === null) {\n    state.reading = false;\n    onEofChunk(stream, state);\n  } else if (state.objectMode || chunk && chunk.length > 0) {\n    if (state.ended && !addToFront) {\n      var e = new Error('stream.push() after EOF');\n      stream.emit('error', e);\n    } else if (state.endEmitted && addToFront) {\n      var e = new Error('stream.unshift() after end event');\n      stream.emit('error', e);\n    } else {\n      if (state.decoder && !addToFront && !encoding)\n        chunk = state.decoder.write(chunk);\n\n      if (!addToFront)\n        state.reading = false;\n\n      // if we want the data now, just emit it.\n      if (state.flowing && state.length === 0 && !state.sync) {\n        stream.emit('data', chunk);\n        stream.read(0);\n      } else {\n        // update the buffer info.\n        state.length += state.objectMode ? 1 : chunk.length;\n        if (addToFront)\n          state.buffer.unshift(chunk);\n        else\n          state.buffer.push(chunk);\n\n        if (state.needReadable)\n          emitReadable(stream);\n      }\n\n      maybeReadMore(stream, state);\n    }\n  } else if (!addToFront) {\n    state.reading = false;\n  }\n\n  return needMoreData(state);\n}\n\n\n// if it's past the high water mark, we can push in some more.\n// Also, if we have no data yet, we can stand some\n// more bytes.  This is to work around cases where hwm=0,\n// such as the repl.  Also, if the push() triggered a\n// readable event, and the user called read(largeNumber) such that\n// needReadable was set, then we ought to push more, so that another\n// 'readable' event will be triggered.\nfunction needMoreData(state) {\n  return !state.ended &&\n         (state.needReadable ||\n          state.length < state.highWaterMark ||\n          state.length === 0);\n}\n\n// backwards compatibility.\nReadable.prototype.setEncoding = function(enc) {\n  if (!StringDecoder)\n    StringDecoder = require('string_decoder/').StringDecoder;\n  this._readableState.decoder = new StringDecoder(enc);\n  this._readableState.encoding = enc;\n  return this;\n};\n\n// Don't raise the hwm > 8MB\nvar MAX_HWM = 0x800000;\nfunction computeNewHighWaterMark(n) {\n  if (n >= MAX_HWM) {\n    n = MAX_HWM;\n  } else {\n    // Get the next highest power of 2\n    n--;\n    n |= n >>> 1;\n    n |= n >>> 2;\n    n |= n >>> 4;\n    n |= n >>> 8;\n    n |= n >>> 16;\n    n++;\n  }\n  return n;\n}\n\nfunction howMuchToRead(n, state) {\n  if (state.length === 0 && state.ended)\n    return 0;\n\n  if (state.objectMode)\n    return n === 0 ? 0 : 1;\n\n  if (n === null || isNaN(n)) {\n    // only flow one buffer at a time\n    if (state.flowing && state.buffer.length)\n      return state.buffer[0].length;\n    else\n      return state.length;\n  }\n\n  if (n <= 0)\n    return 0;\n\n  // If we're asking for more than the target buffer level,\n  // then raise the water mark.  Bump up to the next highest\n  // power of 2, to prevent increasing it excessively in tiny\n  // amounts.\n  if (n > state.highWaterMark)\n    state.highWaterMark = computeNewHighWaterMark(n);\n\n  // don't have that much.  return null, unless we've ended.\n  if (n > state.length) {\n    if (!state.ended) {\n      state.needReadable = true;\n      return 0;\n    } else {\n      return state.length;\n    }\n  }\n\n  return n;\n}\n\n// you can override either this method, or the async _read(n) below.\nReadable.prototype.read = function(n) {\n  debug('read', n);\n  var state = this._readableState;\n  var nOrig = n;\n\n  if (typeof n !== 'number' || n > 0)\n    state.emittedReadable = false;\n\n  // if we're doing read(0) to trigger a readable event, but we\n  // already have a bunch of data in the buffer, then just trigger\n  // the 'readable' event and move on.\n  if (n === 0 &&\n      state.needReadable &&\n      (state.length >= state.highWaterMark || state.ended)) {\n    debug('read: emitReadable', state.length, state.ended);\n    if (state.length === 0 && state.ended)\n      endReadable(this);\n    else\n      emitReadable(this);\n    return null;\n  }\n\n  n = howMuchToRead(n, state);\n\n  // if we've ended, and we're now clear, then finish it up.\n  if (n === 0 && state.ended) {\n    if (state.length === 0)\n      endReadable(this);\n    return null;\n  }\n\n  // All the actual chunk generation logic needs to be\n  // *below* the call to _read.  The reason is that in certain\n  // synthetic stream cases, such as passthrough streams, _read\n  // may be a completely synchronous operation which may change\n  // the state of the read buffer, providing enough data when\n  // before there was *not* enough.\n  //\n  // So, the steps are:\n  // 1. Figure out what the state of things will be after we do\n  // a read from the buffer.\n  //\n  // 2. If that resulting state will trigger a _read, then call _read.\n  // Note that this may be asynchronous, or synchronous.  Yes, it is\n  // deeply ugly to write APIs this way, but that still doesn't mean\n  // that the Readable class should behave improperly, as streams are\n  // designed to be sync/async agnostic.\n  // Take note if the _read call is sync or async (ie, if the read call\n  // has returned yet), so that we know whether or not it's safe to emit\n  // 'readable' etc.\n  //\n  // 3. Actually pull the requested chunks out of the buffer and return.\n\n  // if we need a readable event, then we need to do some reading.\n  var doRead = state.needReadable;\n  debug('need readable', doRead);\n\n  // if we currently have less than the highWaterMark, then also read some\n  if (state.length === 0 || state.length - n < state.highWaterMark) {\n    doRead = true;\n    debug('length less than watermark', doRead);\n  }\n\n  // however, if we've ended, then there's no point, and if we're already\n  // reading, then it's unnecessary.\n  if (state.ended || state.reading) {\n    doRead = false;\n    debug('reading or ended', doRead);\n  }\n\n  if (doRead) {\n    debug('do read');\n    state.reading = true;\n    state.sync = true;\n    // if the length is currently zero, then we *need* a readable event.\n    if (state.length === 0)\n      state.needReadable = true;\n    // call internal read method\n    this._read(state.highWaterMark);\n    state.sync = false;\n  }\n\n  // If _read pushed data synchronously, then `reading` will be false,\n  // and we need to re-evaluate how much data we can return to the user.\n  if (doRead && !state.reading)\n    n = howMuchToRead(nOrig, state);\n\n  var ret;\n  if (n > 0)\n    ret = fromList(n, state);\n  else\n    ret = null;\n\n  if (ret === null) {\n    state.needReadable = true;\n    n = 0;\n  }\n\n  state.length -= n;\n\n  // If we have nothing in the buffer, then we want to know\n  // as soon as we *do* get something into the buffer.\n  if (state.length === 0 && !state.ended)\n    state.needReadable = true;\n\n  // If we tried to read() past the EOF, then emit end on the next tick.\n  if (nOrig !== n && state.ended && state.length === 0)\n    endReadable(this);\n\n  if (ret !== null)\n    this.emit('data', ret);\n\n  return ret;\n};\n\nfunction chunkInvalid(state, chunk) {\n  var er = null;\n  if (!(Buffer.isBuffer(chunk)) &&\n      typeof chunk !== 'string' &&\n      chunk !== null &&\n      chunk !== undefined &&\n      !state.objectMode) {\n    er = new TypeError('Invalid non-string/buffer chunk');\n  }\n  return er;\n}\n\n\nfunction onEofChunk(stream, state) {\n  if (state.ended) return;\n  if (state.decoder) {\n    var chunk = state.decoder.end();\n    if (chunk && chunk.length) {\n      state.buffer.push(chunk);\n      state.length += state.objectMode ? 1 : chunk.length;\n    }\n  }\n  state.ended = true;\n\n  // emit 'readable' now to make sure it gets picked up.\n  emitReadable(stream);\n}\n\n// Don't emit readable right away in sync mode, because this can trigger\n// another read() call => stack overflow.  This way, it might trigger\n// a nextTick recursion warning, but that's not so bad.\nfunction emitReadable(stream) {\n  var state = stream._readableState;\n  state.needReadable = false;\n  if (!state.emittedReadable) {\n    debug('emitReadable', state.flowing);\n    state.emittedReadable = true;\n    if (state.sync)\n      processNextTick(emitReadable_, stream);\n    else\n      emitReadable_(stream);\n  }\n}\n\nfunction emitReadable_(stream) {\n  debug('emit readable');\n  stream.emit('readable');\n  flow(stream);\n}\n\n\n// at this point, the user has presumably seen the 'readable' event,\n// and called read() to consume some data.  that may have triggered\n// in turn another _read(n) call, in which case reading = true if\n// it's in progress.\n// However, if we're not ended, or reading, and the length < hwm,\n// then go ahead and try to read some more preemptively.\nfunction maybeReadMore(stream, state) {\n  if (!state.readingMore) {\n    state.readingMore = true;\n    processNextTick(maybeReadMore_, stream, state);\n  }\n}\n\nfunction maybeReadMore_(stream, state) {\n  var len = state.length;\n  while (!state.reading && !state.flowing && !state.ended &&\n         state.length < state.highWaterMark) {\n    debug('maybeReadMore read 0');\n    stream.read(0);\n    if (len === state.length)\n      // didn't get any data, stop spinning.\n      break;\n    else\n      len = state.length;\n  }\n  state.readingMore = false;\n}\n\n// abstract method.  to be overridden in specific implementation classes.\n// call cb(er, data) where data is <= n in length.\n// for virtual (non-string, non-buffer) streams, \"length\" is somewhat\n// arbitrary, and perhaps not very meaningful.\nReadable.prototype._read = function(n) {\n  this.emit('error', new Error('not implemented'));\n};\n\nReadable.prototype.pipe = function(dest, pipeOpts) {\n  var src = this;\n  var state = this._readableState;\n\n  switch (state.pipesCount) {\n    case 0:\n      state.pipes = dest;\n      break;\n    case 1:\n      state.pipes = [state.pipes, dest];\n      break;\n    default:\n      state.pipes.push(dest);\n      break;\n  }\n  state.pipesCount += 1;\n  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);\n\n  var doEnd = (!pipeOpts || pipeOpts.end !== false) &&\n              dest !== process.stdout &&\n              dest !== process.stderr;\n\n  var endFn = doEnd ? onend : cleanup;\n  if (state.endEmitted)\n    processNextTick(endFn);\n  else\n    src.once('end', endFn);\n\n  dest.on('unpipe', onunpipe);\n  function onunpipe(readable) {\n    debug('onunpipe');\n    if (readable === src) {\n      cleanup();\n    }\n  }\n\n  function onend() {\n    debug('onend');\n    dest.end();\n  }\n\n  // when the dest drains, it reduces the awaitDrain counter\n  // on the source.  This would be more elegant with a .once()\n  // handler in flow(), but adding and removing repeatedly is\n  // too slow.\n  var ondrain = pipeOnDrain(src);\n  dest.on('drain', ondrain);\n\n  var cleanedUp = false;\n  function cleanup() {\n    debug('cleanup');\n    // cleanup event handlers once the pipe is broken\n    dest.removeListener('close', onclose);\n    dest.removeListener('finish', onfinish);\n    dest.removeListener('drain', ondrain);\n    dest.removeListener('error', onerror);\n    dest.removeListener('unpipe', onunpipe);\n    src.removeListener('end', onend);\n    src.removeListener('end', cleanup);\n    src.removeListener('data', ondata);\n\n    cleanedUp = true;\n\n    // if the reader is waiting for a drain event from this\n    // specific writer, then it would cause it to never start\n    // flowing again.\n    // So, if this is awaiting a drain, then we just call it now.\n    // If we don't know, then assume that we are waiting for one.\n    if (state.awaitDrain &&\n        (!dest._writableState || dest._writableState.needDrain))\n      ondrain();\n  }\n\n  src.on('data', ondata);\n  function ondata(chunk) {\n    debug('ondata');\n    var ret = dest.write(chunk);\n    if (false === ret) {\n      // If the user unpiped during `dest.write()`, it is possible\n      // to get stuck in a permanently paused state if that write\n      // also returned false.\n      if (state.pipesCount === 1 &&\n          state.pipes[0] === dest &&\n          src.listenerCount('data') === 1 &&\n          !cleanedUp) {\n        debug('false write response, pause', src._readableState.awaitDrain);\n        src._readableState.awaitDrain++;\n      }\n      src.pause();\n    }\n  }\n\n  // if the dest has an error, then stop piping into it.\n  // however, don't suppress the throwing behavior for this.\n  function onerror(er) {\n    debug('onerror', er);\n    unpipe();\n    dest.removeListener('error', onerror);\n    if (EElistenerCount(dest, 'error') === 0)\n      dest.emit('error', er);\n  }\n  // This is a brutally ugly hack to make sure that our error handler\n  // is attached before any userland ones.  NEVER DO THIS.\n  if (!dest._events || !dest._events.error)\n    dest.on('error', onerror);\n  else if (isArray(dest._events.error))\n    dest._events.error.unshift(onerror);\n  else\n    dest._events.error = [onerror, dest._events.error];\n\n\n  // Both close and finish should trigger unpipe, but only once.\n  function onclose() {\n    dest.removeListener('finish', onfinish);\n    unpipe();\n  }\n  dest.once('close', onclose);\n  function onfinish() {\n    debug('onfinish');\n    dest.removeListener('close', onclose);\n    unpipe();\n  }\n  dest.once('finish', onfinish);\n\n  function unpipe() {\n    debug('unpipe');\n    src.unpipe(dest);\n  }\n\n  // tell the dest that it's being piped to\n  dest.emit('pipe', src);\n\n  // start the flow if it hasn't been started already.\n  if (!state.flowing) {\n    debug('pipe resume');\n    src.resume();\n  }\n\n  return dest;\n};\n\nfunction pipeOnDrain(src) {\n  return function() {\n    var state = src._readableState;\n    debug('pipeOnDrain', state.awaitDrain);\n    if (state.awaitDrain)\n      state.awaitDrain--;\n    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {\n      state.flowing = true;\n      flow(src);\n    }\n  };\n}\n\n\nReadable.prototype.unpipe = function(dest) {\n  var state = this._readableState;\n\n  // if we're not piping anywhere, then do nothing.\n  if (state.pipesCount === 0)\n    return this;\n\n  // just one destination.  most common case.\n  if (state.pipesCount === 1) {\n    // passed in one, but it's not the right one.\n    if (dest && dest !== state.pipes)\n      return this;\n\n    if (!dest)\n      dest = state.pipes;\n\n    // got a match.\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n    if (dest)\n      dest.emit('unpipe', this);\n    return this;\n  }\n\n  // slow case. multiple pipe destinations.\n\n  if (!dest) {\n    // remove all.\n    var dests = state.pipes;\n    var len = state.pipesCount;\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n\n    for (var i = 0; i < len; i++)\n      dests[i].emit('unpipe', this);\n    return this;\n  }\n\n  // try to find the right one.\n  var i = indexOf(state.pipes, dest);\n  if (i === -1)\n    return this;\n\n  state.pipes.splice(i, 1);\n  state.pipesCount -= 1;\n  if (state.pipesCount === 1)\n    state.pipes = state.pipes[0];\n\n  dest.emit('unpipe', this);\n\n  return this;\n};\n\n// set up data events if they are asked for\n// Ensure readable listeners eventually get something\nReadable.prototype.on = function(ev, fn) {\n  var res = Stream.prototype.on.call(this, ev, fn);\n\n  // If listening to data, and it has not explicitly been paused,\n  // then call resume to start the flow of data on the next tick.\n  if (ev === 'data' && false !== this._readableState.flowing) {\n    this.resume();\n  }\n\n  if (ev === 'readable' && this.readable) {\n    var state = this._readableState;\n    if (!state.readableListening) {\n      state.readableListening = true;\n      state.emittedReadable = false;\n      state.needReadable = true;\n      if (!state.reading) {\n        processNextTick(nReadingNextTick, this);\n      } else if (state.length) {\n        emitReadable(this, state);\n      }\n    }\n  }\n\n  return res;\n};\nReadable.prototype.addListener = Readable.prototype.on;\n\nfunction nReadingNextTick(self) {\n  debug('readable nexttick read 0');\n  self.read(0);\n}\n\n// pause() and resume() are remnants of the legacy readable stream API\n// If the user uses them, then switch into old mode.\nReadable.prototype.resume = function() {\n  var state = this._readableState;\n  if (!state.flowing) {\n    debug('resume');\n    state.flowing = true;\n    resume(this, state);\n  }\n  return this;\n};\n\nfunction resume(stream, state) {\n  if (!state.resumeScheduled) {\n    state.resumeScheduled = true;\n    processNextTick(resume_, stream, state);\n  }\n}\n\nfunction resume_(stream, state) {\n  if (!state.reading) {\n    debug('resume read 0');\n    stream.read(0);\n  }\n\n  state.resumeScheduled = false;\n  stream.emit('resume');\n  flow(stream);\n  if (state.flowing && !state.reading)\n    stream.read(0);\n}\n\nReadable.prototype.pause = function() {\n  debug('call pause flowing=%j', this._readableState.flowing);\n  if (false !== this._readableState.flowing) {\n    debug('pause');\n    this._readableState.flowing = false;\n    this.emit('pause');\n  }\n  return this;\n};\n\nfunction flow(stream) {\n  var state = stream._readableState;\n  debug('flow', state.flowing);\n  if (state.flowing) {\n    do {\n      var chunk = stream.read();\n    } while (null !== chunk && state.flowing);\n  }\n}\n\n// wrap an old-style stream as the async data source.\n// This is *not* part of the readable stream interface.\n// It is an ugly unfortunate mess of history.\nReadable.prototype.wrap = function(stream) {\n  var state = this._readableState;\n  var paused = false;\n\n  var self = this;\n  stream.on('end', function() {\n    debug('wrapped end');\n    if (state.decoder && !state.ended) {\n      var chunk = state.decoder.end();\n      if (chunk && chunk.length)\n        self.push(chunk);\n    }\n\n    self.push(null);\n  });\n\n  stream.on('data', function(chunk) {\n    debug('wrapped data');\n    if (state.decoder)\n      chunk = state.decoder.write(chunk);\n\n    // don't skip over falsy values in objectMode\n    if (state.objectMode && (chunk === null || chunk === undefined))\n      return;\n    else if (!state.objectMode && (!chunk || !chunk.length))\n      return;\n\n    var ret = self.push(chunk);\n    if (!ret) {\n      paused = true;\n      stream.pause();\n    }\n  });\n\n  // proxy all the other methods.\n  // important when wrapping filters and duplexes.\n  for (var i in stream) {\n    if (this[i] === undefined && typeof stream[i] === 'function') {\n      this[i] = function(method) { return function() {\n        return stream[method].apply(stream, arguments);\n      }; }(i);\n    }\n  }\n\n  // proxy certain important events.\n  var events = ['error', 'close', 'destroy', 'pause', 'resume'];\n  forEach(events, function(ev) {\n    stream.on(ev, self.emit.bind(self, ev));\n  });\n\n  // when we try to consume some more bytes, simply unpause the\n  // underlying stream.\n  self._read = function(n) {\n    debug('wrapped _read', n);\n    if (paused) {\n      paused = false;\n      stream.resume();\n    }\n  };\n\n  return self;\n};\n\n\n// exposed for testing purposes only.\nReadable._fromList = fromList;\n\n// Pluck off n bytes from an array of buffers.\n// Length is the combined lengths of all the buffers in the list.\nfunction fromList(n, state) {\n  var list = state.buffer;\n  var length = state.length;\n  var stringMode = !!state.decoder;\n  var objectMode = !!state.objectMode;\n  var ret;\n\n  // nothing in the list, definitely empty.\n  if (list.length === 0)\n    return null;\n\n  if (length === 0)\n    ret = null;\n  else if (objectMode)\n    ret = list.shift();\n  else if (!n || n >= length) {\n    // read it all, truncate the array.\n    if (stringMode)\n      ret = list.join('');\n    else if (list.length === 1)\n      ret = list[0];\n    else\n      ret = Buffer.concat(list, length);\n    list.length = 0;\n  } else {\n    // read just some of it.\n    if (n < list[0].length) {\n      // just take a part of the first list item.\n      // slice is the same for buffers and strings.\n      var buf = list[0];\n      ret = buf.slice(0, n);\n      list[0] = buf.slice(n);\n    } else if (n === list[0].length) {\n      // first list is a perfect match\n      ret = list.shift();\n    } else {\n      // complex case.\n      // we have enough to cover it, but it spans past the first buffer.\n      if (stringMode)\n        ret = '';\n      else\n        ret = new Buffer(n);\n\n      var c = 0;\n      for (var i = 0, l = list.length; i < l && c < n; i++) {\n        var buf = list[0];\n        var cpy = Math.min(n - c, buf.length);\n\n        if (stringMode)\n          ret += buf.slice(0, cpy);\n        else\n          buf.copy(ret, c, 0, cpy);\n\n        if (cpy < buf.length)\n          list[0] = buf.slice(cpy);\n        else\n          list.shift();\n\n        c += cpy;\n      }\n    }\n  }\n\n  return ret;\n}\n\nfunction endReadable(stream) {\n  var state = stream._readableState;\n\n  // If we get here before consuming all the bytes, then that is a\n  // bug in node.  Should never happen.\n  if (state.length > 0)\n    throw new Error('endReadable called on non-empty stream');\n\n  if (!state.endEmitted) {\n    state.ended = true;\n    processNextTick(endReadableNT, state, stream);\n  }\n}\n\nfunction endReadableNT(state, stream) {\n  // Check that we didn't get one last unshift.\n  if (!state.endEmitted && state.length === 0) {\n    state.endEmitted = true;\n    stream.readable = false;\n    stream.emit('end');\n  }\n}\n\nfunction forEach (xs, f) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    f(xs[i], i);\n  }\n}\n\nfunction indexOf (xs, x) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    if (xs[i] === x) return i;\n  }\n  return -1;\n}\n",
     "// a transform stream is a readable/writable stream where you do\n// something with the data.  Sometimes it's called a \"filter\",\n// but that's not a great name for it, since that implies a thing where\n// some bits pass through, and others are simply ignored.  (That would\n// be a valid example of a transform, of course.)\n//\n// While the output is causally related to the input, it's not a\n// necessarily symmetric or synchronous transformation.  For example,\n// a zlib stream might take multiple plain-text writes(), and then\n// emit a single compressed chunk some time in the future.\n//\n// Here's how this works:\n//\n// The Transform stream has all the aspects of the readable and writable\n// stream classes.  When you write(chunk), that calls _write(chunk,cb)\n// internally, and returns false if there's a lot of pending writes\n// buffered up.  When you call read(), that calls _read(n) until\n// there's enough pending readable data buffered up.\n//\n// In a transform stream, the written data is placed in a buffer.  When\n// _read(n) is called, it transforms the queued up data, calling the\n// buffered _write cb's as it consumes chunks.  If consuming a single\n// written chunk would result in multiple output chunks, then the first\n// outputted bit calls the readcb, and subsequent chunks just go into\n// the read buffer, and will cause it to emit 'readable' if necessary.\n//\n// This way, back-pressure is actually determined by the reading side,\n// since _read has to be called to start processing a new chunk.  However,\n// a pathological inflate type of transform can cause excessive buffering\n// here.  For example, imagine a stream where every byte of input is\n// interpreted as an integer from 0-255, and then results in that many\n// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in\n// 1kb of data being output.  In this case, you could write a very small\n// amount of input, and end up with a very large amount of output.  In\n// such a pathological inflating mechanism, there'd be no way to tell\n// the system to stop doing the transform.  A single 4MB write could\n// cause the system to run out of memory.\n//\n// However, even in such a pathological case, only a single written chunk\n// would be consumed, and then the rest would wait (un-transformed) until\n// the results of the previous transformed chunk were consumed.\n\n'use strict';\n\nmodule.exports = Transform;\n\nvar Duplex = require('./_stream_duplex');\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nutil.inherits(Transform, Duplex);\n\n\nfunction TransformState(stream) {\n  this.afterTransform = function(er, data) {\n    return afterTransform(stream, er, data);\n  };\n\n  this.needTransform = false;\n  this.transforming = false;\n  this.writecb = null;\n  this.writechunk = null;\n}\n\nfunction afterTransform(stream, er, data) {\n  var ts = stream._transformState;\n  ts.transforming = false;\n\n  var cb = ts.writecb;\n\n  if (!cb)\n    return stream.emit('error', new Error('no writecb in Transform class'));\n\n  ts.writechunk = null;\n  ts.writecb = null;\n\n  if (data !== null && data !== undefined)\n    stream.push(data);\n\n  if (cb)\n    cb(er);\n\n  var rs = stream._readableState;\n  rs.reading = false;\n  if (rs.needReadable || rs.length < rs.highWaterMark) {\n    stream._read(rs.highWaterMark);\n  }\n}\n\n\nfunction Transform(options) {\n  if (!(this instanceof Transform))\n    return new Transform(options);\n\n  Duplex.call(this, options);\n\n  this._transformState = new TransformState(this);\n\n  // when the writable side finishes, then flush out anything remaining.\n  var stream = this;\n\n  // start out asking for a readable event once data is transformed.\n  this._readableState.needReadable = true;\n\n  // we have implemented the _read method, and done the other things\n  // that Readable wants before the first _read call, so unset the\n  // sync guard flag.\n  this._readableState.sync = false;\n\n  if (options) {\n    if (typeof options.transform === 'function')\n      this._transform = options.transform;\n\n    if (typeof options.flush === 'function')\n      this._flush = options.flush;\n  }\n\n  this.once('prefinish', function() {\n    if (typeof this._flush === 'function')\n      this._flush(function(er) {\n        done(stream, er);\n      });\n    else\n      done(stream);\n  });\n}\n\nTransform.prototype.push = function(chunk, encoding) {\n  this._transformState.needTransform = false;\n  return Duplex.prototype.push.call(this, chunk, encoding);\n};\n\n// This is the part where you do stuff!\n// override this function in implementation classes.\n// 'chunk' is an input chunk.\n//\n// Call `push(newChunk)` to pass along transformed output\n// to the readable side.  You may call 'push' zero or more times.\n//\n// Call `cb(err)` when you are done with this chunk.  If you pass\n// an error, then that'll put the hurt on the whole operation.  If you\n// never call cb(), then you'll never get another chunk.\nTransform.prototype._transform = function(chunk, encoding, cb) {\n  throw new Error('not implemented');\n};\n\nTransform.prototype._write = function(chunk, encoding, cb) {\n  var ts = this._transformState;\n  ts.writecb = cb;\n  ts.writechunk = chunk;\n  ts.writeencoding = encoding;\n  if (!ts.transforming) {\n    var rs = this._readableState;\n    if (ts.needTransform ||\n        rs.needReadable ||\n        rs.length < rs.highWaterMark)\n      this._read(rs.highWaterMark);\n  }\n};\n\n// Doesn't matter what the args are here.\n// _transform does all the work.\n// That we got here means that the readable side wants more data.\nTransform.prototype._read = function(n) {\n  var ts = this._transformState;\n\n  if (ts.writechunk !== null && ts.writecb && !ts.transforming) {\n    ts.transforming = true;\n    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);\n  } else {\n    // mark that we need a transform, so that any data that comes in\n    // will get processed, now that we've asked for it.\n    ts.needTransform = true;\n  }\n};\n\n\nfunction done(stream, er) {\n  if (er)\n    return stream.emit('error', er);\n\n  // if there's nothing in the write buffer, then that means\n  // that nothing more will ever be provided\n  var ws = stream._writableState;\n  var ts = stream._transformState;\n\n  if (ws.length)\n    throw new Error('calling transform done when ws.length != 0');\n\n  if (ts.transforming)\n    throw new Error('calling transform done when still transforming');\n\n  return stream.push(null);\n}\n",
-    "// A bit simpler than readable streams.\n// Implement an async ._write(chunk, encoding, cb), and it'll handle all\n// the drain event emission and buffering.\n\n'use strict';\n\nmodule.exports = Writable;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar Buffer = require('buffer').Buffer;\n/*</replacement>*/\n\nWritable.WritableState = WritableState;\n\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar internalUtil = {\n  deprecate: require('util-deprecate')\n};\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar Stream;\n(function (){try{\n  Stream = require('st' + 'ream');\n}catch(_){}finally{\n  if (!Stream)\n    Stream = require('events').EventEmitter;\n}}())\n/*</replacement>*/\n\nvar Buffer = require('buffer').Buffer;\n\nutil.inherits(Writable, Stream);\n\nfunction nop() {}\n\nfunction WriteReq(chunk, encoding, cb) {\n  this.chunk = chunk;\n  this.encoding = encoding;\n  this.callback = cb;\n  this.next = null;\n}\n\nfunction WritableState(options, stream) {\n  var Duplex = require('./_stream_duplex');\n\n  options = options || {};\n\n  // object stream flag to indicate whether or not this stream\n  // contains buffers or objects.\n  this.objectMode = !!options.objectMode;\n\n  if (stream instanceof Duplex)\n    this.objectMode = this.objectMode || !!options.writableObjectMode;\n\n  // the point at which write() starts returning false\n  // Note: 0 is a valid value, means that we always return false if\n  // the entire buffer is not flushed immediately on write()\n  var hwm = options.highWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = ~~this.highWaterMark;\n\n  this.needDrain = false;\n  // at the start of calling end()\n  this.ending = false;\n  // when end() has been called, and returned\n  this.ended = false;\n  // when 'finish' is emitted\n  this.finished = false;\n\n  // should we decode strings into buffers before passing to _write?\n  // this is here so that some node-core streams can optimize string\n  // handling at a lower level.\n  var noDecode = options.decodeStrings === false;\n  this.decodeStrings = !noDecode;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // not an actual buffer we keep track of, but a measurement\n  // of how much we're waiting to get pushed to some underlying\n  // socket or file.\n  this.length = 0;\n\n  // a flag to see when we're in the middle of a write.\n  this.writing = false;\n\n  // when true all writes will be buffered until .uncork() call\n  this.corked = 0;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // a flag to know if we're processing previously buffered items, which\n  // may call the _write() callback in the same tick, so that we don't\n  // end up in an overlapped onwrite situation.\n  this.bufferProcessing = false;\n\n  // the callback that's passed to _write(chunk,cb)\n  this.onwrite = function(er) {\n    onwrite(stream, er);\n  };\n\n  // the callback that the user supplies to write(chunk,encoding,cb)\n  this.writecb = null;\n\n  // the amount that is being written when _write is called.\n  this.writelen = 0;\n\n  this.bufferedRequest = null;\n  this.lastBufferedRequest = null;\n\n  // number of pending user-supplied write callbacks\n  // this must be 0 before 'finish' can be emitted\n  this.pendingcb = 0;\n\n  // emit prefinish if the only thing we're waiting for is _write cbs\n  // This is relevant for synchronous Transform streams\n  this.prefinished = false;\n\n  // True if the error was already emitted and should not be thrown again\n  this.errorEmitted = false;\n}\n\nWritableState.prototype.getBuffer = function writableStateGetBuffer() {\n  var current = this.bufferedRequest;\n  var out = [];\n  while (current) {\n    out.push(current);\n    current = current.next;\n  }\n  return out;\n};\n\n(function (){try {\nObject.defineProperty(WritableState.prototype, 'buffer', {\n  get: internalUtil.deprecate(function() {\n    return this.getBuffer();\n  }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' +\n     'instead.')\n});\n}catch(_){}}());\n\n\nfunction Writable(options) {\n  var Duplex = require('./_stream_duplex');\n\n  // Writable ctor is applied to Duplexes, though they're not\n  // instanceof Writable, they're instanceof Readable.\n  if (!(this instanceof Writable) && !(this instanceof Duplex))\n    return new Writable(options);\n\n  this._writableState = new WritableState(options, this);\n\n  // legacy.\n  this.writable = true;\n\n  if (options) {\n    if (typeof options.write === 'function')\n      this._write = options.write;\n\n    if (typeof options.writev === 'function')\n      this._writev = options.writev;\n  }\n\n  Stream.call(this);\n}\n\n// Otherwise people can pipe Writable streams, which is just wrong.\nWritable.prototype.pipe = function() {\n  this.emit('error', new Error('Cannot pipe. Not readable.'));\n};\n\n\nfunction writeAfterEnd(stream, cb) {\n  var er = new Error('write after end');\n  // TODO: defer error events consistently everywhere, not just the cb\n  stream.emit('error', er);\n  processNextTick(cb, er);\n}\n\n// If we get something that is not a buffer, string, null, or undefined,\n// and we're not in objectMode, then that's an error.\n// Otherwise stream chunks are all considered to be of length=1, and the\n// watermarks determine how many objects to keep in the buffer, rather than\n// how many bytes or characters.\nfunction validChunk(stream, state, chunk, cb) {\n  var valid = true;\n\n  if (!(Buffer.isBuffer(chunk)) &&\n      typeof chunk !== 'string' &&\n      chunk !== null &&\n      chunk !== undefined &&\n      !state.objectMode) {\n    var er = new TypeError('Invalid non-string/buffer chunk');\n    stream.emit('error', er);\n    processNextTick(cb, er);\n    valid = false;\n  }\n  return valid;\n}\n\nWritable.prototype.write = function(chunk, encoding, cb) {\n  var state = this._writableState;\n  var ret = false;\n\n  if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (Buffer.isBuffer(chunk))\n    encoding = 'buffer';\n  else if (!encoding)\n    encoding = state.defaultEncoding;\n\n  if (typeof cb !== 'function')\n    cb = nop;\n\n  if (state.ended)\n    writeAfterEnd(this, cb);\n  else if (validChunk(this, state, chunk, cb)) {\n    state.pendingcb++;\n    ret = writeOrBuffer(this, state, chunk, encoding, cb);\n  }\n\n  return ret;\n};\n\nWritable.prototype.cork = function() {\n  var state = this._writableState;\n\n  state.corked++;\n};\n\nWritable.prototype.uncork = function() {\n  var state = this._writableState;\n\n  if (state.corked) {\n    state.corked--;\n\n    if (!state.writing &&\n        !state.corked &&\n        !state.finished &&\n        !state.bufferProcessing &&\n        state.bufferedRequest)\n      clearBuffer(this, state);\n  }\n};\n\nWritable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {\n  // node::ParseEncoding() requires lower case.\n  if (typeof encoding === 'string')\n    encoding = encoding.toLowerCase();\n  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64',\n'ucs2', 'ucs-2','utf16le', 'utf-16le', 'raw']\n.indexOf((encoding + '').toLowerCase()) > -1))\n    throw new TypeError('Unknown encoding: ' + encoding);\n  this._writableState.defaultEncoding = encoding;\n};\n\nfunction decodeChunk(state, chunk, encoding) {\n  if (!state.objectMode &&\n      state.decodeStrings !== false &&\n      typeof chunk === 'string') {\n    chunk = new Buffer(chunk, encoding);\n  }\n  return chunk;\n}\n\n// if we're already writing something, then just put this\n// in the queue, and wait our turn.  Otherwise, call _write\n// If we return false, then we need a drain event, so set that flag.\nfunction writeOrBuffer(stream, state, chunk, encoding, cb) {\n  chunk = decodeChunk(state, chunk, encoding);\n\n  if (Buffer.isBuffer(chunk))\n    encoding = 'buffer';\n  var len = state.objectMode ? 1 : chunk.length;\n\n  state.length += len;\n\n  var ret = state.length < state.highWaterMark;\n  // we must ensure that previous needDrain will not be reset to false.\n  if (!ret)\n    state.needDrain = true;\n\n  if (state.writing || state.corked) {\n    var last = state.lastBufferedRequest;\n    state.lastBufferedRequest = new WriteReq(chunk, encoding, cb);\n    if (last) {\n      last.next = state.lastBufferedRequest;\n    } else {\n      state.bufferedRequest = state.lastBufferedRequest;\n    }\n  } else {\n    doWrite(stream, state, false, len, chunk, encoding, cb);\n  }\n\n  return ret;\n}\n\nfunction doWrite(stream, state, writev, len, chunk, encoding, cb) {\n  state.writelen = len;\n  state.writecb = cb;\n  state.writing = true;\n  state.sync = true;\n  if (writev)\n    stream._writev(chunk, state.onwrite);\n  else\n    stream._write(chunk, encoding, state.onwrite);\n  state.sync = false;\n}\n\nfunction onwriteError(stream, state, sync, er, cb) {\n  --state.pendingcb;\n  if (sync)\n    processNextTick(cb, er);\n  else\n    cb(er);\n\n  stream._writableState.errorEmitted = true;\n  stream.emit('error', er);\n}\n\nfunction onwriteStateUpdate(state) {\n  state.writing = false;\n  state.writecb = null;\n  state.length -= state.writelen;\n  state.writelen = 0;\n}\n\nfunction onwrite(stream, er) {\n  var state = stream._writableState;\n  var sync = state.sync;\n  var cb = state.writecb;\n\n  onwriteStateUpdate(state);\n\n  if (er)\n    onwriteError(stream, state, sync, er, cb);\n  else {\n    // Check if we're actually ready to finish, but don't emit yet\n    var finished = needFinish(state);\n\n    if (!finished &&\n        !state.corked &&\n        !state.bufferProcessing &&\n        state.bufferedRequest) {\n      clearBuffer(stream, state);\n    }\n\n    if (sync) {\n      processNextTick(afterWrite, stream, state, finished, cb);\n    } else {\n      afterWrite(stream, state, finished, cb);\n    }\n  }\n}\n\nfunction afterWrite(stream, state, finished, cb) {\n  if (!finished)\n    onwriteDrain(stream, state);\n  state.pendingcb--;\n  cb();\n  finishMaybe(stream, state);\n}\n\n// Must force callback to be called on nextTick, so that we don't\n// emit 'drain' before the write() consumer gets the 'false' return\n// value, and has a chance to attach a 'drain' listener.\nfunction onwriteDrain(stream, state) {\n  if (state.length === 0 && state.needDrain) {\n    state.needDrain = false;\n    stream.emit('drain');\n  }\n}\n\n\n// if there's something in the buffer waiting, then process it\nfunction clearBuffer(stream, state) {\n  state.bufferProcessing = true;\n  var entry = state.bufferedRequest;\n\n  if (stream._writev && entry && entry.next) {\n    // Fast case, write everything using _writev()\n    var buffer = [];\n    var cbs = [];\n    while (entry) {\n      cbs.push(entry.callback);\n      buffer.push(entry);\n      entry = entry.next;\n    }\n\n    // count the one we are adding, as well.\n    // TODO(isaacs) clean this up\n    state.pendingcb++;\n    state.lastBufferedRequest = null;\n    doWrite(stream, state, true, state.length, buffer, '', function(err) {\n      for (var i = 0; i < cbs.length; i++) {\n        state.pendingcb--;\n        cbs[i](err);\n      }\n    });\n\n    // Clear buffer\n  } else {\n    // Slow case, write chunks one-by-one\n    while (entry) {\n      var chunk = entry.chunk;\n      var encoding = entry.encoding;\n      var cb = entry.callback;\n      var len = state.objectMode ? 1 : chunk.length;\n\n      doWrite(stream, state, false, len, chunk, encoding, cb);\n      entry = entry.next;\n      // if we didn't call the onwrite immediately, then\n      // it means that we need to wait until it does.\n      // also, that means that the chunk and cb are currently\n      // being processed, so move the buffer counter past them.\n      if (state.writing) {\n        break;\n      }\n    }\n\n    if (entry === null)\n      state.lastBufferedRequest = null;\n  }\n  state.bufferedRequest = entry;\n  state.bufferProcessing = false;\n}\n\nWritable.prototype._write = function(chunk, encoding, cb) {\n  cb(new Error('not implemented'));\n};\n\nWritable.prototype._writev = null;\n\nWritable.prototype.end = function(chunk, encoding, cb) {\n  var state = this._writableState;\n\n  if (typeof chunk === 'function') {\n    cb = chunk;\n    chunk = null;\n    encoding = null;\n  } else if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (chunk !== null && chunk !== undefined)\n    this.write(chunk, encoding);\n\n  // .end() fully uncorks\n  if (state.corked) {\n    state.corked = 1;\n    this.uncork();\n  }\n\n  // ignore unnecessary end() calls.\n  if (!state.ending && !state.finished)\n    endWritable(this, state, cb);\n};\n\n\nfunction needFinish(state) {\n  return (state.ending &&\n          state.length === 0 &&\n          state.bufferedRequest === null &&\n          !state.finished &&\n          !state.writing);\n}\n\nfunction prefinish(stream, state) {\n  if (!state.prefinished) {\n    state.prefinished = true;\n    stream.emit('prefinish');\n  }\n}\n\nfunction finishMaybe(stream, state) {\n  var need = needFinish(state);\n  if (need) {\n    if (state.pendingcb === 0) {\n      prefinish(stream, state);\n      state.finished = true;\n      stream.emit('finish');\n    } else {\n      prefinish(stream, state);\n    }\n  }\n  return need;\n}\n\nfunction endWritable(stream, state, cb) {\n  state.ending = true;\n  finishMaybe(stream, state);\n  if (cb) {\n    if (state.finished)\n      processNextTick(cb);\n    else\n      stream.once('finish', cb);\n  }\n  state.ended = true;\n}\n",
+    "// A bit simpler than readable streams.\n// Implement an async ._write(chunk, encoding, cb), and it'll handle all\n// the drain event emission and buffering.\n\n'use strict';\n\nmodule.exports = Writable;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar Buffer = require('buffer').Buffer;\n/*</replacement>*/\n\nWritable.WritableState = WritableState;\n\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar internalUtil = {\n  deprecate: require('util-deprecate')\n};\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar Stream;\n(function (){try{\n  Stream = require('st' + 'ream');\n}catch(_){}finally{\n  if (!Stream)\n    Stream = require('events').EventEmitter;\n}}())\n/*</replacement>*/\n\nvar Buffer = require('buffer').Buffer;\n\nutil.inherits(Writable, Stream);\n\nfunction nop() {}\n\nfunction WriteReq(chunk, encoding, cb) {\n  this.chunk = chunk;\n  this.encoding = encoding;\n  this.callback = cb;\n  this.next = null;\n}\n\nvar Duplex;\nfunction WritableState(options, stream) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  options = options || {};\n\n  // object stream flag to indicate whether or not this stream\n  // contains buffers or objects.\n  this.objectMode = !!options.objectMode;\n\n  if (stream instanceof Duplex)\n    this.objectMode = this.objectMode || !!options.writableObjectMode;\n\n  // the point at which write() starts returning false\n  // Note: 0 is a valid value, means that we always return false if\n  // the entire buffer is not flushed immediately on write()\n  var hwm = options.highWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = ~~this.highWaterMark;\n\n  this.needDrain = false;\n  // at the start of calling end()\n  this.ending = false;\n  // when end() has been called, and returned\n  this.ended = false;\n  // when 'finish' is emitted\n  this.finished = false;\n\n  // should we decode strings into buffers before passing to _write?\n  // this is here so that some node-core streams can optimize string\n  // handling at a lower level.\n  var noDecode = options.decodeStrings === false;\n  this.decodeStrings = !noDecode;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // not an actual buffer we keep track of, but a measurement\n  // of how much we're waiting to get pushed to some underlying\n  // socket or file.\n  this.length = 0;\n\n  // a flag to see when we're in the middle of a write.\n  this.writing = false;\n\n  // when true all writes will be buffered until .uncork() call\n  this.corked = 0;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // a flag to know if we're processing previously buffered items, which\n  // may call the _write() callback in the same tick, so that we don't\n  // end up in an overlapped onwrite situation.\n  this.bufferProcessing = false;\n\n  // the callback that's passed to _write(chunk,cb)\n  this.onwrite = function(er) {\n    onwrite(stream, er);\n  };\n\n  // the callback that the user supplies to write(chunk,encoding,cb)\n  this.writecb = null;\n\n  // the amount that is being written when _write is called.\n  this.writelen = 0;\n\n  this.bufferedRequest = null;\n  this.lastBufferedRequest = null;\n\n  // number of pending user-supplied write callbacks\n  // this must be 0 before 'finish' can be emitted\n  this.pendingcb = 0;\n\n  // emit prefinish if the only thing we're waiting for is _write cbs\n  // This is relevant for synchronous Transform streams\n  this.prefinished = false;\n\n  // True if the error was already emitted and should not be thrown again\n  this.errorEmitted = false;\n}\n\nWritableState.prototype.getBuffer = function writableStateGetBuffer() {\n  var current = this.bufferedRequest;\n  var out = [];\n  while (current) {\n    out.push(current);\n    current = current.next;\n  }\n  return out;\n};\n\n(function (){try {\nObject.defineProperty(WritableState.prototype, 'buffer', {\n  get: internalUtil.deprecate(function() {\n    return this.getBuffer();\n  }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' +\n     'instead.')\n});\n}catch(_){}}());\n\n\nvar Duplex;\nfunction Writable(options) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  // Writable ctor is applied to Duplexes, though they're not\n  // instanceof Writable, they're instanceof Readable.\n  if (!(this instanceof Writable) && !(this instanceof Duplex))\n    return new Writable(options);\n\n  this._writableState = new WritableState(options, this);\n\n  // legacy.\n  this.writable = true;\n\n  if (options) {\n    if (typeof options.write === 'function')\n      this._write = options.write;\n\n    if (typeof options.writev === 'function')\n      this._writev = options.writev;\n  }\n\n  Stream.call(this);\n}\n\n// Otherwise people can pipe Writable streams, which is just wrong.\nWritable.prototype.pipe = function() {\n  this.emit('error', new Error('Cannot pipe. Not readable.'));\n};\n\n\nfunction writeAfterEnd(stream, cb) {\n  var er = new Error('write after end');\n  // TODO: defer error events consistently everywhere, not just the cb\n  stream.emit('error', er);\n  processNextTick(cb, er);\n}\n\n// If we get something that is not a buffer, string, null, or undefined,\n// and we're not in objectMode, then that's an error.\n// Otherwise stream chunks are all considered to be of length=1, and the\n// watermarks determine how many objects to keep in the buffer, rather than\n// how many bytes or characters.\nfunction validChunk(stream, state, chunk, cb) {\n  var valid = true;\n\n  if (!(Buffer.isBuffer(chunk)) &&\n      typeof chunk !== 'string' &&\n      chunk !== null &&\n      chunk !== undefined &&\n      !state.objectMode) {\n    var er = new TypeError('Invalid non-string/buffer chunk');\n    stream.emit('error', er);\n    processNextTick(cb, er);\n    valid = false;\n  }\n  return valid;\n}\n\nWritable.prototype.write = function(chunk, encoding, cb) {\n  var state = this._writableState;\n  var ret = false;\n\n  if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (Buffer.isBuffer(chunk))\n    encoding = 'buffer';\n  else if (!encoding)\n    encoding = state.defaultEncoding;\n\n  if (typeof cb !== 'function')\n    cb = nop;\n\n  if (state.ended)\n    writeAfterEnd(this, cb);\n  else if (validChunk(this, state, chunk, cb)) {\n    state.pendingcb++;\n    ret = writeOrBuffer(this, state, chunk, encoding, cb);\n  }\n\n  return ret;\n};\n\nWritable.prototype.cork = function() {\n  var state = this._writableState;\n\n  state.corked++;\n};\n\nWritable.prototype.uncork = function() {\n  var state = this._writableState;\n\n  if (state.corked) {\n    state.corked--;\n\n    if (!state.writing &&\n        !state.corked &&\n        !state.finished &&\n        !state.bufferProcessing &&\n        state.bufferedRequest)\n      clearBuffer(this, state);\n  }\n};\n\nWritable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {\n  // node::ParseEncoding() requires lower case.\n  if (typeof encoding === 'string')\n    encoding = encoding.toLowerCase();\n  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64',\n'ucs2', 'ucs-2','utf16le', 'utf-16le', 'raw']\n.indexOf((encoding + '').toLowerCase()) > -1))\n    throw new TypeError('Unknown encoding: ' + encoding);\n  this._writableState.defaultEncoding = encoding;\n};\n\nfunction decodeChunk(state, chunk, encoding) {\n  if (!state.objectMode &&\n      state.decodeStrings !== false &&\n      typeof chunk === 'string') {\n    chunk = new Buffer(chunk, encoding);\n  }\n  return chunk;\n}\n\n// if we're already writing something, then just put this\n// in the queue, and wait our turn.  Otherwise, call _write\n// If we return false, then we need a drain event, so set that flag.\nfunction writeOrBuffer(stream, state, chunk, encoding, cb) {\n  chunk = decodeChunk(state, chunk, encoding);\n\n  if (Buffer.isBuffer(chunk))\n    encoding = 'buffer';\n  var len = state.objectMode ? 1 : chunk.length;\n\n  state.length += len;\n\n  var ret = state.length < state.highWaterMark;\n  // we must ensure that previous needDrain will not be reset to false.\n  if (!ret)\n    state.needDrain = true;\n\n  if (state.writing || state.corked) {\n    var last = state.lastBufferedRequest;\n    state.lastBufferedRequest = new WriteReq(chunk, encoding, cb);\n    if (last) {\n      last.next = state.lastBufferedRequest;\n    } else {\n      state.bufferedRequest = state.lastBufferedRequest;\n    }\n  } else {\n    doWrite(stream, state, false, len, chunk, encoding, cb);\n  }\n\n  return ret;\n}\n\nfunction doWrite(stream, state, writev, len, chunk, encoding, cb) {\n  state.writelen = len;\n  state.writecb = cb;\n  state.writing = true;\n  state.sync = true;\n  if (writev)\n    stream._writev(chunk, state.onwrite);\n  else\n    stream._write(chunk, encoding, state.onwrite);\n  state.sync = false;\n}\n\nfunction onwriteError(stream, state, sync, er, cb) {\n  --state.pendingcb;\n  if (sync)\n    processNextTick(cb, er);\n  else\n    cb(er);\n\n  stream._writableState.errorEmitted = true;\n  stream.emit('error', er);\n}\n\nfunction onwriteStateUpdate(state) {\n  state.writing = false;\n  state.writecb = null;\n  state.length -= state.writelen;\n  state.writelen = 0;\n}\n\nfunction onwrite(stream, er) {\n  var state = stream._writableState;\n  var sync = state.sync;\n  var cb = state.writecb;\n\n  onwriteStateUpdate(state);\n\n  if (er)\n    onwriteError(stream, state, sync, er, cb);\n  else {\n    // Check if we're actually ready to finish, but don't emit yet\n    var finished = needFinish(state);\n\n    if (!finished &&\n        !state.corked &&\n        !state.bufferProcessing &&\n        state.bufferedRequest) {\n      clearBuffer(stream, state);\n    }\n\n    if (sync) {\n      processNextTick(afterWrite, stream, state, finished, cb);\n    } else {\n      afterWrite(stream, state, finished, cb);\n    }\n  }\n}\n\nfunction afterWrite(stream, state, finished, cb) {\n  if (!finished)\n    onwriteDrain(stream, state);\n  state.pendingcb--;\n  cb();\n  finishMaybe(stream, state);\n}\n\n// Must force callback to be called on nextTick, so that we don't\n// emit 'drain' before the write() consumer gets the 'false' return\n// value, and has a chance to attach a 'drain' listener.\nfunction onwriteDrain(stream, state) {\n  if (state.length === 0 && state.needDrain) {\n    state.needDrain = false;\n    stream.emit('drain');\n  }\n}\n\n\n// if there's something in the buffer waiting, then process it\nfunction clearBuffer(stream, state) {\n  state.bufferProcessing = true;\n  var entry = state.bufferedRequest;\n\n  if (stream._writev && entry && entry.next) {\n    // Fast case, write everything using _writev()\n    var buffer = [];\n    var cbs = [];\n    while (entry) {\n      cbs.push(entry.callback);\n      buffer.push(entry);\n      entry = entry.next;\n    }\n\n    // count the one we are adding, as well.\n    // TODO(isaacs) clean this up\n    state.pendingcb++;\n    state.lastBufferedRequest = null;\n    doWrite(stream, state, true, state.length, buffer, '', function(err) {\n      for (var i = 0; i < cbs.length; i++) {\n        state.pendingcb--;\n        cbs[i](err);\n      }\n    });\n\n    // Clear buffer\n  } else {\n    // Slow case, write chunks one-by-one\n    while (entry) {\n      var chunk = entry.chunk;\n      var encoding = entry.encoding;\n      var cb = entry.callback;\n      var len = state.objectMode ? 1 : chunk.length;\n\n      doWrite(stream, state, false, len, chunk, encoding, cb);\n      entry = entry.next;\n      // if we didn't call the onwrite immediately, then\n      // it means that we need to wait until it does.\n      // also, that means that the chunk and cb are currently\n      // being processed, so move the buffer counter past them.\n      if (state.writing) {\n        break;\n      }\n    }\n\n    if (entry === null)\n      state.lastBufferedRequest = null;\n  }\n  state.bufferedRequest = entry;\n  state.bufferProcessing = false;\n}\n\nWritable.prototype._write = function(chunk, encoding, cb) {\n  cb(new Error('not implemented'));\n};\n\nWritable.prototype._writev = null;\n\nWritable.prototype.end = function(chunk, encoding, cb) {\n  var state = this._writableState;\n\n  if (typeof chunk === 'function') {\n    cb = chunk;\n    chunk = null;\n    encoding = null;\n  } else if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (chunk !== null && chunk !== undefined)\n    this.write(chunk, encoding);\n\n  // .end() fully uncorks\n  if (state.corked) {\n    state.corked = 1;\n    this.uncork();\n  }\n\n  // ignore unnecessary end() calls.\n  if (!state.ending && !state.finished)\n    endWritable(this, state, cb);\n};\n\n\nfunction needFinish(state) {\n  return (state.ending &&\n          state.length === 0 &&\n          state.bufferedRequest === null &&\n          !state.finished &&\n          !state.writing);\n}\n\nfunction prefinish(stream, state) {\n  if (!state.prefinished) {\n    state.prefinished = true;\n    stream.emit('prefinish');\n  }\n}\n\nfunction finishMaybe(stream, state) {\n  var need = needFinish(state);\n  if (need) {\n    if (state.pendingcb === 0) {\n      prefinish(stream, state);\n      state.finished = true;\n      stream.emit('finish');\n    } else {\n      prefinish(stream, state);\n    }\n  }\n  return need;\n}\n\nfunction endWritable(stream, state, cb) {\n  state.ending = true;\n  finishMaybe(stream, state);\n  if (cb) {\n    if (state.finished)\n      processNextTick(cb);\n    else\n      stream.once('finish', cb);\n  }\n  state.ended = true;\n}\n",
     "module.exports = require(\"./lib/_stream_passthrough.js\")\n",
     "var Stream = (function (){\n  try {\n    return require('st' + 'ream'); // hack to fix a circular dependency issue when used with browserify\n  } catch(_){}\n}());\nexports = module.exports = require('./lib/_stream_readable.js');\nexports.Stream = Stream || exports;\nexports.Readable = exports;\nexports.Writable = require('./lib/_stream_writable.js');\nexports.Duplex = require('./lib/_stream_duplex.js');\nexports.Transform = require('./lib/_stream_transform.js');\nexports.PassThrough = require('./lib/_stream_passthrough.js');\n",
     "module.exports = require(\"./lib/_stream_transform.js\")\n",
@@ -185,15 +184,14 @@
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nmodule.exports = Stream;\n\nvar EE = require('events').EventEmitter;\nvar inherits = require('inherits');\n\ninherits(Stream, EE);\nStream.Readable = require('readable-stream/readable.js');\nStream.Writable = require('readable-stream/writable.js');\nStream.Duplex = require('readable-stream/duplex.js');\nStream.Transform = require('readable-stream/transform.js');\nStream.PassThrough = require('readable-stream/passthrough.js');\n\n// Backwards-compat with node 0.4.x\nStream.Stream = Stream;\n\n\n\n// old-style streams.  Note that the pipe method (the only relevant\n// part of this class) is overridden in the Readable class.\n\nfunction Stream() {\n  EE.call(this);\n}\n\nStream.prototype.pipe = function(dest, options) {\n  var source = this;\n\n  function ondata(chunk) {\n    if (dest.writable) {\n      if (false === dest.write(chunk) && source.pause) {\n        source.pause();\n      }\n    }\n  }\n\n  source.on('data', ondata);\n\n  function ondrain() {\n    if (source.readable && source.resume) {\n      source.resume();\n    }\n  }\n\n  dest.on('drain', ondrain);\n\n  // If the 'end' option is not supplied, dest.end() will be called when\n  // source gets the 'end' or 'close' events.  Only dest.end() once.\n  if (!dest._isStdio && (!options || options.end !== false)) {\n    source.on('end', onend);\n    source.on('close', onclose);\n  }\n\n  var didOnEnd = false;\n  function onend() {\n    if (didOnEnd) return;\n    didOnEnd = true;\n\n    dest.end();\n  }\n\n\n  function onclose() {\n    if (didOnEnd) return;\n    didOnEnd = true;\n\n    if (typeof dest.destroy === 'function') dest.destroy();\n  }\n\n  // don't leave dangling pipes when there are errors.\n  function onerror(er) {\n    cleanup();\n    if (EE.listenerCount(this, 'error') === 0) {\n      throw er; // Unhandled stream error in pipe.\n    }\n  }\n\n  source.on('error', onerror);\n  dest.on('error', onerror);\n\n  // remove all the event listeners that were added.\n  function cleanup() {\n    source.removeListener('data', ondata);\n    dest.removeListener('drain', ondrain);\n\n    source.removeListener('end', onend);\n    source.removeListener('close', onclose);\n\n    source.removeListener('error', onerror);\n    dest.removeListener('error', onerror);\n\n    source.removeListener('end', cleanup);\n    source.removeListener('close', cleanup);\n\n    dest.removeListener('close', cleanup);\n  }\n\n  source.on('end', cleanup);\n  source.on('close', cleanup);\n\n  dest.on('close', cleanup);\n\n  dest.emit('pipe', source);\n\n  // Allow for unix-like usage: A.pipe(B).pipe(C)\n  return dest;\n};\n",
     "var ClientRequest = require('./lib/request')\nvar extend = require('xtend')\nvar statusCodes = require('builtin-status-codes')\nvar url = require('url')\n\nvar http = exports\n\nhttp.request = function (opts, cb) {\n\tif (typeof opts === 'string')\n\t\topts = url.parse(opts)\n\telse\n\t\topts = extend(opts)\n\n\tvar protocol = opts.protocol || ''\n\tvar host = opts.hostname || opts.host\n\tvar port = opts.port\n\tvar path = opts.path || '/'\n\n\t// Necessary for IPv6 addresses\n\tif (host && host.indexOf(':') !== -1)\n\t\thost = '[' + host + ']'\n\n\t// This may be a relative url. The browser should always be able to interpret it correctly.\n\topts.url = (host ? (protocol + '//' + host) : '') + (port ? ':' + port : '') + path\n\topts.method = (opts.method || 'GET').toUpperCase()\n\topts.headers = opts.headers || {}\n\n\t// Also valid opts.auth, opts.mode\n\n\tvar req = new ClientRequest(opts)\n\tif (cb)\n\t\treq.on('response', cb)\n\treturn req\n}\n\nhttp.get = function get (opts, cb) {\n\tvar req = http.request(opts, cb)\n\treq.end()\n\treturn req\n}\n\nhttp.Agent = function () {}\nhttp.Agent.defaultMaxSockets = 4\n\nhttp.STATUS_CODES = statusCodes\n\nhttp.METHODS = [\n\t'CHECKOUT',\n\t'CONNECT',\n\t'COPY',\n\t'DELETE',\n\t'GET',\n\t'HEAD',\n\t'LOCK',\n\t'M-SEARCH',\n\t'MERGE',\n\t'MKACTIVITY',\n\t'MKCOL',\n\t'MOVE',\n\t'NOTIFY',\n\t'OPTIONS',\n\t'PATCH',\n\t'POST',\n\t'PROPFIND',\n\t'PROPPATCH',\n\t'PURGE',\n\t'PUT',\n\t'REPORT',\n\t'SEARCH',\n\t'SUBSCRIBE',\n\t'TRACE',\n\t'UNLOCK',\n\t'UNSUBSCRIBE'\n]",
     "exports.fetch = isFunction(global.fetch) && isFunction(global.ReadableByteStream)\n\nexports.blobConstructor = false\ntry {\n\tnew Blob([new ArrayBuffer(1)])\n\texports.blobConstructor = true\n} catch (e) {}\n\nvar xhr = new global.XMLHttpRequest()\n// If location.host is empty, e.g. if this page/worker was loaded\n// from a Blob, then use example.com to avoid an error\nxhr.open('GET', global.location.host ? '/' : 'https://example.com')\n\nfunction checkTypeSupport (type) {\n\ttry {\n\t\txhr.responseType = type\n\t\treturn xhr.responseType === type\n\t} catch (e) {}\n\treturn false\n}\n\n// For some strange reason, Safari 7.0 reports typeof global.ArrayBuffer === 'object'.\n// Safari 7.1 appears to have fixed this bug.\nvar haveArrayBuffer = typeof global.ArrayBuffer !== 'undefined'\nvar haveSlice = haveArrayBuffer && isFunction(global.ArrayBuffer.prototype.slice)\n\nexports.arraybuffer = haveArrayBuffer && checkTypeSupport('arraybuffer')\n// These next two tests unavoidably show warnings in Chrome. Since fetch will always\n// be used if it's available, just return false for these to avoid the warnings.\nexports.msstream = !exports.fetch && haveSlice && checkTypeSupport('ms-stream')\nexports.mozchunkedarraybuffer = !exports.fetch && haveArrayBuffer &&\n\tcheckTypeSupport('moz-chunked-arraybuffer')\nexports.overrideMimeType = isFunction(xhr.overrideMimeType)\nexports.vbArray = isFunction(global.VBArray)\n\nfunction isFunction (value) {\n  return typeof value === 'function'\n}\n\nxhr = null // Help gc\n",
-    "// var Base64 = require('Base64')\nvar capability = require('./capability')\nvar foreach = require('foreach')\nvar indexOf = require('indexof')\nvar inherits = require('inherits')\nvar keys = require('object-keys')\nvar response = require('./response')\nvar stream = require('stream')\n\nvar IncomingMessage = response.IncomingMessage\nvar rStates = response.readyStates\n\nfunction decideMode (preferBinary) {\n\tif (capability.fetch) {\n\t\treturn 'fetch'\n\t} else if (capability.mozchunkedarraybuffer) {\n\t\treturn 'moz-chunked-arraybuffer'\n\t} else if (capability.msstream) {\n\t\treturn 'ms-stream'\n\t} else if (capability.arraybuffer && preferBinary) {\n\t\treturn 'arraybuffer'\n\t} else if (capability.vbArray && preferBinary) {\n\t\treturn 'text:vbarray'\n\t} else {\n\t\treturn 'text'\n\t}\n}\n\nvar ClientRequest = module.exports = function (opts) {\n\tvar self = this\n\tstream.Writable.call(self)\n\n\tself._opts = opts\n\tself._body = []\n\tself._headers = {}\n\tif (opts.auth)\n\t\tself.setHeader('Authorization', 'Basic ' + new Buffer(opts.auth).toString('base64'))\n\tforeach(keys(opts.headers), function (name) {\n\t\tself.setHeader(name, opts.headers[name])\n\t})\n\n\tvar preferBinary\n\tif (opts.mode === 'prefer-streaming') {\n\t\t// If streaming is a high priority but binary compatibility and\n\t\t// the accuracy of the 'content-type' header aren't\n\t\tpreferBinary = false\n\t} else if (opts.mode === 'allow-wrong-content-type') {\n\t\t// If streaming is more important than preserving the 'content-type' header\n\t\tpreferBinary = !capability.overrideMimeType\n\t} else if (!opts.mode || opts.mode === 'default' || opts.mode === 'prefer-fast') {\n\t\t// Use binary if text streaming may corrupt data or the content-type header, or for speed\n\t\tpreferBinary = true\n\t} else {\n\t\tthrow new Error('Invalid value for opts.mode')\n\t}\n\tself._mode = decideMode(preferBinary)\n\n\tself.on('finish', function () {\n\t\tself._onFinish()\n\t})\n}\n\ninherits(ClientRequest, stream.Writable)\n\nClientRequest.prototype.setHeader = function (name, value) {\n\tvar self = this\n\tvar lowerName = name.toLowerCase()\n\t// This check is not necessary, but it prevents warnings from browsers about setting unsafe\n\t// headers. To be honest I'm not entirely sure hiding these warnings is a good thing, but\n\t// http-browserify did it, so I will too.\n\tif (indexOf(unsafeHeaders, lowerName) !== -1)\n\t\treturn\n\n\tself._headers[lowerName] = {\n\t\tname: name,\n\t\tvalue: value\n\t}\n}\n\nClientRequest.prototype.getHeader = function (name) {\n\tvar self = this\n\treturn self._headers[name.toLowerCase()].value\n}\n\nClientRequest.prototype.removeHeader = function (name) {\n\tvar self = this\n\tdelete self._headers[name.toLowerCase()]\n}\n\nClientRequest.prototype._onFinish = function () {\n\tvar self = this\n\n\tif (self._destroyed)\n\t\treturn\n\tvar opts = self._opts\n\n\tvar headersObj = self._headers\n\tvar body\n\tif (opts.method === 'POST' || opts.method === 'PUT') {\n\t\tif (capability.blobConstructor) {\n\t\t\tbody = new global.Blob(self._body.map(function (buffer) {\n\t\t\t\treturn buffer.toArrayBuffer()\n\t\t\t}), {\n\t\t\t\ttype: (headersObj['content-type'] || {}).value || ''\n\t\t\t})\n\t\t} else {\n\t\t\t// get utf8 string\n\t\t\tbody = Buffer.concat(self._body).toString()\n\t\t}\n\t}\n\n\tif (self._mode === 'fetch') {\n\t\tvar headers = keys(headersObj).map(function (name) {\n\t\t\treturn [headersObj[name].name, headersObj[name].value]\n\t\t})\n\n\t\tglobal.fetch(self._opts.url, {\n\t\t\tmethod: self._opts.method,\n\t\t\theaders: headers,\n\t\t\tbody: body,\n\t\t\tmode: 'cors',\n\t\t\tcredentials: opts.withCredentials ? 'include' : 'same-origin'\n\t\t}).then(function (response) {\n\t\t\tself._fetchResponse = response\n\t\t\tself._connect()\n\t\t}).then(undefined, function (reason) {\n\t\t\tself.emit('error', reason)\n\t\t})\n\t} else {\n\t\tvar xhr = self._xhr = new global.XMLHttpRequest()\n\t\ttry {\n\t\t\txhr.open(self._opts.method, self._opts.url, true)\n\t\t} catch (err) {\n\t\t\tprocess.nextTick(function () {\n\t\t\t\tself.emit('error', err)\n\t\t\t})\n\t\t\treturn\n\t\t}\n\n\t\t// Can't set responseType on really old browsers\n\t\tif ('responseType' in xhr)\n\t\t\txhr.responseType = self._mode.split(':')[0]\n\n\t\tif ('withCredentials' in xhr)\n\t\t\txhr.withCredentials = !!opts.withCredentials\n\n\t\tif (self._mode === 'text' && 'overrideMimeType' in xhr)\n\t\t\txhr.overrideMimeType('text/plain; charset=x-user-defined')\n\n\t\tforeach(keys(headersObj), function (name) {\n\t\t\txhr.setRequestHeader(headersObj[name].name, headersObj[name].value)\n\t\t})\n\n\t\tself._response = null\n\t\txhr.onreadystatechange = function () {\n\t\t\tswitch (xhr.readyState) {\n\t\t\t\tcase rStates.LOADING:\n\t\t\t\tcase rStates.DONE:\n\t\t\t\t\tself._onXHRProgress()\n\t\t\t\t\tbreak\n\t\t\t}\n\t\t}\n\t\t// Necessary for streaming in Firefox, since xhr.response is ONLY defined\n\t\t// in onprogress, not in onreadystatechange with xhr.readyState = 3\n\t\tif (self._mode === 'moz-chunked-arraybuffer') {\n\t\t\txhr.onprogress = function () {\n\t\t\t\tself._onXHRProgress()\n\t\t\t}\n\t\t}\n\n\t\txhr.onerror = function () {\n\t\t\tif (self._destroyed)\n\t\t\t\treturn\n\t\t\tself.emit('error', new Error('XHR error'))\n\t\t}\n\n\t\ttry {\n\t\t\txhr.send(body)\n\t\t} catch (err) {\n\t\t\tprocess.nextTick(function () {\n\t\t\t\tself.emit('error', err)\n\t\t\t})\n\t\t\treturn\n\t\t}\n\t}\n}\n\n/**\n * Checks if xhr.status is readable. Even though the spec says it should\n * be available in readyState 3, accessing it throws an exception in IE8\n */\nfunction statusValid (xhr) {\n\ttry {\n\t\treturn (xhr.status !== null)\n\t} catch (e) {\n\t\treturn false\n\t}\n}\n\nClientRequest.prototype._onXHRProgress = function () {\n\tvar self = this\n\n\tif (!statusValid(self._xhr) || self._destroyed)\n\t\treturn\n\n\tif (!self._response)\n\t\tself._connect()\n\n\tself._response._onXHRProgress()\n}\n\nClientRequest.prototype._connect = function () {\n\tvar self = this\n\n\tif (self._destroyed)\n\t\treturn\n\n\tself._response = new IncomingMessage(self._xhr, self._fetchResponse, self._mode)\n\tself.emit('response', self._response)\n}\n\nClientRequest.prototype._write = function (chunk, encoding, cb) {\n\tvar self = this\n\n\tself._body.push(chunk)\n\tcb()\n}\n\nClientRequest.prototype.abort = ClientRequest.prototype.destroy = function () {\n\tvar self = this\n\tself._destroyed = true\n\tif (self._response)\n\t\tself._response._destroyed = true\n\tif (self._xhr)\n\t\tself._xhr.abort()\n\t// Currently, there isn't a way to truly abort a fetch.\n\t// If you like bikeshedding, see https://github.com/whatwg/fetch/issues/27\n}\n\nClientRequest.prototype.end = function (data, encoding, cb) {\n\tvar self = this\n\tif (typeof data === 'function') {\n\t\tcb = data\n\t\tdata = undefined\n\t}\n\n\tstream.Writable.prototype.end.call(self, data, encoding, cb)\n}\n\nClientRequest.prototype.flushHeaders = function () {}\nClientRequest.prototype.setTimeout = function () {}\nClientRequest.prototype.setNoDelay = function () {}\nClientRequest.prototype.setSocketKeepAlive = function () {}\n\n// Taken from http://www.w3.org/TR/XMLHttpRequest/#the-setrequestheader%28%29-method\nvar unsafeHeaders = [\n\t'accept-charset',\n\t'accept-encoding',\n\t'access-control-request-headers',\n\t'access-control-request-method',\n\t'connection',\n\t'content-length',\n\t'cookie',\n\t'cookie2',\n\t'date',\n\t'dnt',\n\t'expect',\n\t'host',\n\t'keep-alive',\n\t'origin',\n\t'referer',\n\t'te',\n\t'trailer',\n\t'transfer-encoding',\n\t'upgrade',\n\t'user-agent',\n\t'via'\n]\n",
-    "var capability = require('./capability')\nvar foreach = require('foreach')\nvar inherits = require('inherits')\nvar stream = require('stream')\n\nvar rStates = exports.readyStates = {\n\tUNSENT: 0,\n\tOPENED: 1,\n\tHEADERS_RECEIVED: 2,\n\tLOADING: 3,\n\tDONE: 4\n}\n\nvar IncomingMessage = exports.IncomingMessage = function (xhr, response, mode) {\n\tvar self = this\n\tstream.Readable.call(self)\n\n\tself._mode = mode\n\tself.headers = {}\n\tself.rawHeaders = []\n\tself.trailers = {}\n\tself.rawTrailers = []\n\n\t// Fake the 'close' event, but only once 'end' fires\n\tself.on('end', function () {\n\t\t// The nextTick is necessary to prevent the 'request' module from causing an infinite loop\n\t\tprocess.nextTick(function () {\n\t\t\tself.emit('close')\n\t\t})\n\t})\n\n\tif (mode === 'fetch') {\n\t\tself._fetchResponse = response\n\n\t\tself.statusCode = response.status\n\t\tself.statusMessage = response.statusText\n\t\t// backwards compatible version of for (<item> of <iterable>):\n\t\t// for (var <item>,_i,_it = <iterable>[Symbol.iterator](); <item> = (_i = _it.next()).value,!_i.done;)\n\t\tfor (var header, _i, _it = response.headers[Symbol.iterator](); header = (_i = _it.next()).value, !_i.done;) {\n\t\t\tself.headers[header[0].toLowerCase()] = header[1]\n\t\t\tself.rawHeaders.push(header[0], header[1])\n\t\t}\n\n\t\t// TODO: this doesn't respect backpressure. Once WritableStream is available, this can be fixed\n\t\tvar reader = response.body.getReader()\n\t\tfunction read () {\n\t\t\treader.read().then(function (result) {\n\t\t\t\tif (self._destroyed)\n\t\t\t\t\treturn\n\t\t\t\tif (result.done) {\n\t\t\t\t\tself.push(null)\n\t\t\t\t\treturn\n\t\t\t\t}\n\t\t\t\tself.push(new Buffer(result.value))\n\t\t\t\tread()\n\t\t\t})\n\t\t}\n\t\tread()\n\n\t} else {\n\t\tself._xhr = xhr\n\t\tself._pos = 0\n\n\t\tself.statusCode = xhr.status\n\t\tself.statusMessage = xhr.statusText\n\t\tvar headers = xhr.getAllResponseHeaders().split(/\\r?\\n/)\n\t\tforeach(headers, function (header) {\n\t\t\tvar matches = header.match(/^([^:]+):\\s*(.*)/)\n\t\t\tif (matches) {\n\t\t\t\tvar key = matches[1].toLowerCase()\n\t\t\t\tif (self.headers[key] !== undefined)\n\t\t\t\t\tself.headers[key] += ', ' + matches[2]\n\t\t\t\telse\n\t\t\t\t\tself.headers[key] = matches[2]\n\t\t\t\tself.rawHeaders.push(matches[1], matches[2])\n\t\t\t}\n\t\t})\n\n\t\tself._charset = 'x-user-defined'\n\t\tif (!capability.overrideMimeType) {\n\t\t\tvar mimeType = self.rawHeaders['mime-type']\n\t\t\tif (mimeType) {\n\t\t\t\tvar charsetMatch = mimeType.match(/;\\s*charset=([^;])(;|$)/)\n\t\t\t\tif (charsetMatch) {\n\t\t\t\t\tself._charset = charsetMatch[1].toLowerCase()\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (!self._charset)\n\t\t\t\tself._charset = 'utf-8' // best guess\n\t\t}\n\t}\n}\n\ninherits(IncomingMessage, stream.Readable)\n\nIncomingMessage.prototype._read = function () {}\n\nIncomingMessage.prototype._onXHRProgress = function () {\n\tvar self = this\n\n\tvar xhr = self._xhr\n\n\tvar response = null\n\tswitch (self._mode) {\n\t\tcase 'text:vbarray': // For IE9\n\t\t\tif (xhr.readyState !== rStates.DONE)\n\t\t\t\tbreak\n\t\t\ttry {\n\t\t\t\t// This fails in IE8\n\t\t\t\tresponse = new global.VBArray(xhr.responseBody).toArray()\n\t\t\t} catch (e) {}\n\t\t\tif (response !== null) {\n\t\t\t\tself.push(new Buffer(response))\n\t\t\t\tbreak\n\t\t\t}\n\t\t\t// Falls through in IE8\t\n\t\tcase 'text':\n\t\t\ttry { // This will fail when readyState = 3 in IE9. Switch mode and wait for readyState = 4\n\t\t\t\tresponse = xhr.responseText\n\t\t\t} catch (e) {\n\t\t\t\tself._mode = 'text:vbarray'\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tif (response.length > self._pos) {\n\t\t\t\tvar newData = response.substr(self._pos)\n\t\t\t\tif (self._charset === 'x-user-defined') {\n\t\t\t\t\tvar buffer = new Buffer(newData.length)\n\t\t\t\t\tfor (var i = 0; i < newData.length; i++)\n\t\t\t\t\t\tbuffer[i] = newData.charCodeAt(i) & 0xff\n\n\t\t\t\t\tself.push(buffer)\n\t\t\t\t} else {\n\t\t\t\t\tself.push(newData, self._charset)\n\t\t\t\t}\n\t\t\t\tself._pos = response.length\n\t\t\t}\n\t\t\tbreak\n\t\tcase 'arraybuffer':\n\t\t\tif (xhr.readyState !== rStates.DONE)\n\t\t\t\tbreak\n\t\t\tresponse = xhr.response\n\t\t\tself.push(new Buffer(new Uint8Array(response)))\n\t\t\tbreak\n\t\tcase 'moz-chunked-arraybuffer': // take whole\n\t\t\tresponse = xhr.response\n\t\t\tif (xhr.readyState !== rStates.LOADING || !response)\n\t\t\t\tbreak\n\t\t\tself.push(new Buffer(new Uint8Array(response)))\n\t\t\tbreak\n\t\tcase 'ms-stream':\n\t\t\tresponse = xhr.response\n\t\t\tif (xhr.readyState !== rStates.LOADING)\n\t\t\t\tbreak\n\t\t\tvar reader = new global.MSStreamReader()\n\t\t\treader.onprogress = function () {\n\t\t\t\tif (reader.result.byteLength > self._pos) {\n\t\t\t\t\tself.push(new Buffer(new Uint8Array(reader.result.slice(self._pos))))\n\t\t\t\t\tself._pos = reader.result.byteLength\n\t\t\t\t}\n\t\t\t}\n\t\t\treader.onload = function () {\n\t\t\t\tself.push(null)\n\t\t\t}\n\t\t\t// reader.onerror = ??? // TODO: this\n\t\t\treader.readAsArrayBuffer(response)\n\t\t\tbreak\n\t}\n\n\t// The ms-stream case handles end separately in reader.onload()\n\tif (self._xhr.readyState === rStates.DONE && self._mode !== 'ms-stream') {\n\t\tself.push(null)\n\t}\n}\n",
-    "'use strict';\n\n// modified from https://github.com/es-shims/es5-shim\nvar has = Object.prototype.hasOwnProperty;\nvar toStr = Object.prototype.toString;\nvar slice = Array.prototype.slice;\nvar isArgs = require('./isArguments');\nvar hasDontEnumBug = !({ toString: null }).propertyIsEnumerable('toString');\nvar hasProtoEnumBug = function () {}.propertyIsEnumerable('prototype');\nvar dontEnums = [\n\t'toString',\n\t'toLocaleString',\n\t'valueOf',\n\t'hasOwnProperty',\n\t'isPrototypeOf',\n\t'propertyIsEnumerable',\n\t'constructor'\n];\nvar equalsConstructorPrototype = function (o) {\n\tvar ctor = o.constructor;\n\treturn ctor && ctor.prototype === o;\n};\nvar blacklistedKeys = {\n\t$console: true,\n\t$frame: true,\n\t$frameElement: true,\n\t$frames: true,\n\t$parent: true,\n\t$self: true,\n\t$webkitIndexedDB: true,\n\t$webkitStorageInfo: true,\n\t$window: true\n};\nvar hasAutomationEqualityBug = (function () {\n\t/* global window */\n\tif (typeof window === 'undefined') { return false; }\n\tfor (var k in window) {\n\t\ttry {\n\t\t\tif (!blacklistedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {\n\t\t\t\ttry {\n\t\t\t\t\tequalsConstructorPrototype(window[k]);\n\t\t\t\t} catch (e) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t} catch (e) {\n\t\t\treturn true;\n\t\t}\n\t}\n\treturn false;\n}());\nvar equalsConstructorPrototypeIfNotBuggy = function (o) {\n\t/* global window */\n\tif (typeof window === 'undefined' || !hasAutomationEqualityBug) {\n\t\treturn equalsConstructorPrototype(o);\n\t}\n\ttry {\n\t\treturn equalsConstructorPrototype(o);\n\t} catch (e) {\n\t\treturn false;\n\t}\n};\n\nvar keysShim = function keys(object) {\n\tvar isObject = object !== null && typeof object === 'object';\n\tvar isFunction = toStr.call(object) === '[object Function]';\n\tvar isArguments = isArgs(object);\n\tvar isString = isObject && toStr.call(object) === '[object String]';\n\tvar theKeys = [];\n\n\tif (!isObject && !isFunction && !isArguments) {\n\t\tthrow new TypeError('Object.keys called on a non-object');\n\t}\n\n\tvar skipProto = hasProtoEnumBug && isFunction;\n\tif (isString && object.length > 0 && !has.call(object, 0)) {\n\t\tfor (var i = 0; i < object.length; ++i) {\n\t\t\ttheKeys.push(String(i));\n\t\t}\n\t}\n\n\tif (isArguments && object.length > 0) {\n\t\tfor (var j = 0; j < object.length; ++j) {\n\t\t\ttheKeys.push(String(j));\n\t\t}\n\t} else {\n\t\tfor (var name in object) {\n\t\t\tif (!(skipProto && name === 'prototype') && has.call(object, name)) {\n\t\t\t\ttheKeys.push(String(name));\n\t\t\t}\n\t\t}\n\t}\n\n\tif (hasDontEnumBug) {\n\t\tvar skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);\n\n\t\tfor (var k = 0; k < dontEnums.length; ++k) {\n\t\t\tif (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {\n\t\t\t\ttheKeys.push(dontEnums[k]);\n\t\t\t}\n\t\t}\n\t}\n\treturn theKeys;\n};\n\nkeysShim.shim = function shimObjectKeys() {\n\tif (Object.keys) {\n\t\tvar keysWorksWithArguments = (function () {\n\t\t\t// Safari 5.0 bug\n\t\t\treturn (Object.keys(arguments) || '').length === 2;\n\t\t}(1, 2));\n\t\tif (!keysWorksWithArguments) {\n\t\t\tvar originalKeys = Object.keys;\n\t\t\tObject.keys = function keys(object) {\n\t\t\t\tif (isArgs(object)) {\n\t\t\t\t\treturn originalKeys(slice.call(object));\n\t\t\t\t} else {\n\t\t\t\t\treturn originalKeys(object);\n\t\t\t\t}\n\t\t\t};\n\t\t}\n\t} else {\n\t\tObject.keys = keysShim;\n\t}\n\treturn Object.keys || keysShim;\n};\n\nmodule.exports = keysShim;\n",
-    "'use strict';\n\nvar toStr = Object.prototype.toString;\n\nmodule.exports = function isArguments(value) {\n\tvar str = toStr.call(value);\n\tvar isArgs = str === '[object Arguments]';\n\tif (!isArgs) {\n\t\tisArgs = str !== '[object Array]' &&\n\t\t\tvalue !== null &&\n\t\t\ttypeof value === 'object' &&\n\t\t\ttypeof value.length === 'number' &&\n\t\t\tvalue.length >= 0 &&\n\t\t\ttoStr.call(value.callee) === '[object Function]';\n\t}\n\treturn isArgs;\n};\n",
+    "// var Base64 = require('Base64')\nvar capability = require('./capability')\nvar inherits = require('inherits')\nvar response = require('./response')\nvar stream = require('stream')\n\nvar IncomingMessage = response.IncomingMessage\nvar rStates = response.readyStates\n\nfunction decideMode (preferBinary) {\n\tif (capability.fetch) {\n\t\treturn 'fetch'\n\t} else if (capability.mozchunkedarraybuffer) {\n\t\treturn 'moz-chunked-arraybuffer'\n\t} else if (capability.msstream) {\n\t\treturn 'ms-stream'\n\t} else if (capability.arraybuffer && preferBinary) {\n\t\treturn 'arraybuffer'\n\t} else if (capability.vbArray && preferBinary) {\n\t\treturn 'text:vbarray'\n\t} else {\n\t\treturn 'text'\n\t}\n}\n\nvar ClientRequest = module.exports = function (opts) {\n\tvar self = this\n\tstream.Writable.call(self)\n\n\tself._opts = opts\n\tself._body = []\n\tself._headers = {}\n\tif (opts.auth)\n\t\tself.setHeader('Authorization', 'Basic ' + new Buffer(opts.auth).toString('base64'))\n\tObject.keys(opts.headers).forEach(function (name) {\n\t\tself.setHeader(name, opts.headers[name])\n\t})\n\n\tvar preferBinary\n\tif (opts.mode === 'prefer-streaming') {\n\t\t// If streaming is a high priority but binary compatibility and\n\t\t// the accuracy of the 'content-type' header aren't\n\t\tpreferBinary = false\n\t} else if (opts.mode === 'allow-wrong-content-type') {\n\t\t// If streaming is more important than preserving the 'content-type' header\n\t\tpreferBinary = !capability.overrideMimeType\n\t} else if (!opts.mode || opts.mode === 'default' || opts.mode === 'prefer-fast') {\n\t\t// Use binary if text streaming may corrupt data or the content-type header, or for speed\n\t\tpreferBinary = true\n\t} else {\n\t\tthrow new Error('Invalid value for opts.mode')\n\t}\n\tself._mode = decideMode(preferBinary)\n\n\tself.on('finish', function () {\n\t\tself._onFinish()\n\t})\n}\n\ninherits(ClientRequest, stream.Writable)\n\nClientRequest.prototype.setHeader = function (name, value) {\n\tvar self = this\n\tvar lowerName = name.toLowerCase()\n\t// This check is not necessary, but it prevents warnings from browsers about setting unsafe\n\t// headers. To be honest I'm not entirely sure hiding these warnings is a good thing, but\n\t// http-browserify did it, so I will too.\n\tif (unsafeHeaders.indexOf(lowerName) !== -1)\n\t\treturn\n\n\tself._headers[lowerName] = {\n\t\tname: name,\n\t\tvalue: value\n\t}\n}\n\nClientRequest.prototype.getHeader = function (name) {\n\tvar self = this\n\treturn self._headers[name.toLowerCase()].value\n}\n\nClientRequest.prototype.removeHeader = function (name) {\n\tvar self = this\n\tdelete self._headers[name.toLowerCase()]\n}\n\nClientRequest.prototype._onFinish = function () {\n\tvar self = this\n\n\tif (self._destroyed)\n\t\treturn\n\tvar opts = self._opts\n\n\tvar headersObj = self._headers\n\tvar body\n\tif (opts.method === 'POST' || opts.method === 'PUT' || opts.method === 'PATCH') {\n\t\tif (capability.blobConstructor) {\n\t\t\tbody = new global.Blob(self._body.map(function (buffer) {\n\t\t\t\treturn buffer.toArrayBuffer()\n\t\t\t}), {\n\t\t\t\ttype: (headersObj['content-type'] || {}).value || ''\n\t\t\t})\n\t\t} else {\n\t\t\t// get utf8 string\n\t\t\tbody = Buffer.concat(self._body).toString()\n\t\t}\n\t}\n\n\tif (self._mode === 'fetch') {\n\t\tvar headers = Object.keys(headersObj).map(function (name) {\n\t\t\treturn [headersObj[name].name, headersObj[name].value]\n\t\t})\n\n\t\tglobal.fetch(self._opts.url, {\n\t\t\tmethod: self._opts.method,\n\t\t\theaders: headers,\n\t\t\tbody: body,\n\t\t\tmode: 'cors',\n\t\t\tcredentials: opts.withCredentials ? 'include' : 'same-origin'\n\t\t}).then(function (response) {\n\t\t\tself._fetchResponse = response\n\t\t\tself._connect()\n\t\t}, function (reason) {\n\t\t\tself.emit('error', reason)\n\t\t})\n\t} else {\n\t\tvar xhr = self._xhr = new global.XMLHttpRequest()\n\t\ttry {\n\t\t\txhr.open(self._opts.method, self._opts.url, true)\n\t\t} catch (err) {\n\t\t\tprocess.nextTick(function () {\n\t\t\t\tself.emit('error', err)\n\t\t\t})\n\t\t\treturn\n\t\t}\n\n\t\t// Can't set responseType on really old browsers\n\t\tif ('responseType' in xhr)\n\t\t\txhr.responseType = self._mode.split(':')[0]\n\n\t\tif ('withCredentials' in xhr)\n\t\t\txhr.withCredentials = !!opts.withCredentials\n\n\t\tif (self._mode === 'text' && 'overrideMimeType' in xhr)\n\t\t\txhr.overrideMimeType('text/plain; charset=x-user-defined')\n\n\t\tObject.keys(headersObj).forEach(function (name) {\n\t\t\txhr.setRequestHeader(headersObj[name].name, headersObj[name].value)\n\t\t})\n\n\t\tself._response = null\n\t\txhr.onreadystatechange = function () {\n\t\t\tswitch (xhr.readyState) {\n\t\t\t\tcase rStates.LOADING:\n\t\t\t\tcase rStates.DONE:\n\t\t\t\t\tself._onXHRProgress()\n\t\t\t\t\tbreak\n\t\t\t}\n\t\t}\n\t\t// Necessary for streaming in Firefox, since xhr.response is ONLY defined\n\t\t// in onprogress, not in onreadystatechange with xhr.readyState = 3\n\t\tif (self._mode === 'moz-chunked-arraybuffer') {\n\t\t\txhr.onprogress = function () {\n\t\t\t\tself._onXHRProgress()\n\t\t\t}\n\t\t}\n\n\t\txhr.onerror = function () {\n\t\t\tif (self._destroyed)\n\t\t\t\treturn\n\t\t\tself.emit('error', new Error('XHR error'))\n\t\t}\n\n\t\ttry {\n\t\t\txhr.send(body)\n\t\t} catch (err) {\n\t\t\tprocess.nextTick(function () {\n\t\t\t\tself.emit('error', err)\n\t\t\t})\n\t\t\treturn\n\t\t}\n\t}\n}\n\n/**\n * Checks if xhr.status is readable. Even though the spec says it should\n * be available in readyState 3, accessing it throws an exception in IE8\n */\nfunction statusValid (xhr) {\n\ttry {\n\t\treturn (xhr.status !== null)\n\t} catch (e) {\n\t\treturn false\n\t}\n}\n\nClientRequest.prototype._onXHRProgress = function () {\n\tvar self = this\n\n\tif (!statusValid(self._xhr) || self._destroyed)\n\t\treturn\n\n\tif (!self._response)\n\t\tself._connect()\n\n\tself._response._onXHRProgress()\n}\n\nClientRequest.prototype._connect = function () {\n\tvar self = this\n\n\tif (self._destroyed)\n\t\treturn\n\n\tself._response = new IncomingMessage(self._xhr, self._fetchResponse, self._mode)\n\tself.emit('response', self._response)\n}\n\nClientRequest.prototype._write = function (chunk, encoding, cb) {\n\tvar self = this\n\n\tself._body.push(chunk)\n\tcb()\n}\n\nClientRequest.prototype.abort = ClientRequest.prototype.destroy = function () {\n\tvar self = this\n\tself._destroyed = true\n\tif (self._response)\n\t\tself._response._destroyed = true\n\tif (self._xhr)\n\t\tself._xhr.abort()\n\t// Currently, there isn't a way to truly abort a fetch.\n\t// If you like bikeshedding, see https://github.com/whatwg/fetch/issues/27\n}\n\nClientRequest.prototype.end = function (data, encoding, cb) {\n\tvar self = this\n\tif (typeof data === 'function') {\n\t\tcb = data\n\t\tdata = undefined\n\t}\n\n\tstream.Writable.prototype.end.call(self, data, encoding, cb)\n}\n\nClientRequest.prototype.flushHeaders = function () {}\nClientRequest.prototype.setTimeout = function () {}\nClientRequest.prototype.setNoDelay = function () {}\nClientRequest.prototype.setSocketKeepAlive = function () {}\n\n// Taken from http://www.w3.org/TR/XMLHttpRequest/#the-setrequestheader%28%29-method\nvar unsafeHeaders = [\n\t'accept-charset',\n\t'accept-encoding',\n\t'access-control-request-headers',\n\t'access-control-request-method',\n\t'connection',\n\t'content-length',\n\t'cookie',\n\t'cookie2',\n\t'date',\n\t'dnt',\n\t'expect',\n\t'host',\n\t'keep-alive',\n\t'origin',\n\t'referer',\n\t'te',\n\t'trailer',\n\t'transfer-encoding',\n\t'upgrade',\n\t'user-agent',\n\t'via'\n]\n",
+    "var capability = require('./capability')\nvar inherits = require('inherits')\nvar stream = require('stream')\n\nvar rStates = exports.readyStates = {\n\tUNSENT: 0,\n\tOPENED: 1,\n\tHEADERS_RECEIVED: 2,\n\tLOADING: 3,\n\tDONE: 4\n}\n\nvar IncomingMessage = exports.IncomingMessage = function (xhr, response, mode) {\n\tvar self = this\n\tstream.Readable.call(self)\n\n\tself._mode = mode\n\tself.headers = {}\n\tself.rawHeaders = []\n\tself.trailers = {}\n\tself.rawTrailers = []\n\n\t// Fake the 'close' event, but only once 'end' fires\n\tself.on('end', function () {\n\t\t// The nextTick is necessary to prevent the 'request' module from causing an infinite loop\n\t\tprocess.nextTick(function () {\n\t\t\tself.emit('close')\n\t\t})\n\t})\n\n\tif (mode === 'fetch') {\n\t\tself._fetchResponse = response\n\n\t\tself.statusCode = response.status\n\t\tself.statusMessage = response.statusText\n\t\t// backwards compatible version of for (<item> of <iterable>):\n\t\t// for (var <item>,_i,_it = <iterable>[Symbol.iterator](); <item> = (_i = _it.next()).value,!_i.done;)\n\t\tfor (var header, _i, _it = response.headers[Symbol.iterator](); header = (_i = _it.next()).value, !_i.done;) {\n\t\t\tself.headers[header[0].toLowerCase()] = header[1]\n\t\t\tself.rawHeaders.push(header[0], header[1])\n\t\t}\n\n\t\t// TODO: this doesn't respect backpressure. Once WritableStream is available, this can be fixed\n\t\tvar reader = response.body.getReader()\n\t\tfunction read () {\n\t\t\treader.read().then(function (result) {\n\t\t\t\tif (self._destroyed)\n\t\t\t\t\treturn\n\t\t\t\tif (result.done) {\n\t\t\t\t\tself.push(null)\n\t\t\t\t\treturn\n\t\t\t\t}\n\t\t\t\tself.push(new Buffer(result.value))\n\t\t\t\tread()\n\t\t\t})\n\t\t}\n\t\tread()\n\n\t} else {\n\t\tself._xhr = xhr\n\t\tself._pos = 0\n\n\t\tself.statusCode = xhr.status\n\t\tself.statusMessage = xhr.statusText\n\t\tvar headers = xhr.getAllResponseHeaders().split(/\\r?\\n/)\n\t\theaders.forEach(function (header) {\n\t\t\tvar matches = header.match(/^([^:]+):\\s*(.*)/)\n\t\t\tif (matches) {\n\t\t\t\tvar key = matches[1].toLowerCase()\n\t\t\t\tif (self.headers[key] !== undefined)\n\t\t\t\t\tself.headers[key] += ', ' + matches[2]\n\t\t\t\telse\n\t\t\t\t\tself.headers[key] = matches[2]\n\t\t\t\tself.rawHeaders.push(matches[1], matches[2])\n\t\t\t}\n\t\t})\n\n\t\tself._charset = 'x-user-defined'\n\t\tif (!capability.overrideMimeType) {\n\t\t\tvar mimeType = self.rawHeaders['mime-type']\n\t\t\tif (mimeType) {\n\t\t\t\tvar charsetMatch = mimeType.match(/;\\s*charset=([^;])(;|$)/)\n\t\t\t\tif (charsetMatch) {\n\t\t\t\t\tself._charset = charsetMatch[1].toLowerCase()\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (!self._charset)\n\t\t\t\tself._charset = 'utf-8' // best guess\n\t\t}\n\t}\n}\n\ninherits(IncomingMessage, stream.Readable)\n\nIncomingMessage.prototype._read = function () {}\n\nIncomingMessage.prototype._onXHRProgress = function () {\n\tvar self = this\n\n\tvar xhr = self._xhr\n\n\tvar response = null\n\tswitch (self._mode) {\n\t\tcase 'text:vbarray': // For IE9\n\t\t\tif (xhr.readyState !== rStates.DONE)\n\t\t\t\tbreak\n\t\t\ttry {\n\t\t\t\t// This fails in IE8\n\t\t\t\tresponse = new global.VBArray(xhr.responseBody).toArray()\n\t\t\t} catch (e) {}\n\t\t\tif (response !== null) {\n\t\t\t\tself.push(new Buffer(response))\n\t\t\t\tbreak\n\t\t\t}\n\t\t\t// Falls through in IE8\t\n\t\tcase 'text':\n\t\t\ttry { // This will fail when readyState = 3 in IE9. Switch mode and wait for readyState = 4\n\t\t\t\tresponse = xhr.responseText\n\t\t\t} catch (e) {\n\t\t\t\tself._mode = 'text:vbarray'\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tif (response.length > self._pos) {\n\t\t\t\tvar newData = response.substr(self._pos)\n\t\t\t\tif (self._charset === 'x-user-defined') {\n\t\t\t\t\tvar buffer = new Buffer(newData.length)\n\t\t\t\t\tfor (var i = 0; i < newData.length; i++)\n\t\t\t\t\t\tbuffer[i] = newData.charCodeAt(i) & 0xff\n\n\t\t\t\t\tself.push(buffer)\n\t\t\t\t} else {\n\t\t\t\t\tself.push(newData, self._charset)\n\t\t\t\t}\n\t\t\t\tself._pos = response.length\n\t\t\t}\n\t\t\tbreak\n\t\tcase 'arraybuffer':\n\t\t\tif (xhr.readyState !== rStates.DONE)\n\t\t\t\tbreak\n\t\t\tresponse = xhr.response\n\t\t\tself.push(new Buffer(new Uint8Array(response)))\n\t\t\tbreak\n\t\tcase 'moz-chunked-arraybuffer': // take whole\n\t\t\tresponse = xhr.response\n\t\t\tif (xhr.readyState !== rStates.LOADING || !response)\n\t\t\t\tbreak\n\t\t\tself.push(new Buffer(new Uint8Array(response)))\n\t\t\tbreak\n\t\tcase 'ms-stream':\n\t\t\tresponse = xhr.response\n\t\t\tif (xhr.readyState !== rStates.LOADING)\n\t\t\t\tbreak\n\t\t\tvar reader = new global.MSStreamReader()\n\t\t\treader.onprogress = function () {\n\t\t\t\tif (reader.result.byteLength > self._pos) {\n\t\t\t\t\tself.push(new Buffer(new Uint8Array(reader.result.slice(self._pos))))\n\t\t\t\t\tself._pos = reader.result.byteLength\n\t\t\t\t}\n\t\t\t}\n\t\t\treader.onload = function () {\n\t\t\t\tself.push(null)\n\t\t\t}\n\t\t\t// reader.onerror = ??? // TODO: this\n\t\t\treader.readAsArrayBuffer(response)\n\t\t\tbreak\n\t}\n\n\t// The ms-stream case handles end separately in reader.onload()\n\tif (self._xhr.readyState === rStates.DONE && self._mode !== 'ms-stream') {\n\t\tself.push(null)\n\t}\n}\n",
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nvar Buffer = require('buffer').Buffer;\n\nvar isBufferEncoding = Buffer.isEncoding\n  || function(encoding) {\n       switch (encoding && encoding.toLowerCase()) {\n         case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true;\n         default: return false;\n       }\n     }\n\n\nfunction assertEncoding(encoding) {\n  if (encoding && !isBufferEncoding(encoding)) {\n    throw new Error('Unknown encoding: ' + encoding);\n  }\n}\n\n// StringDecoder provides an interface for efficiently splitting a series of\n// buffers into a series of JS strings without breaking apart multi-byte\n// characters. CESU-8 is handled as part of the UTF-8 encoding.\n//\n// @TODO Handling all encodings inside a single object makes it very difficult\n// to reason about this code, so it should be split up in the future.\n// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code\n// points as used by CESU-8.\nvar StringDecoder = exports.StringDecoder = function(encoding) {\n  this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, '');\n  assertEncoding(encoding);\n  switch (this.encoding) {\n    case 'utf8':\n      // CESU-8 represents each of Surrogate Pair by 3-bytes\n      this.surrogateSize = 3;\n      break;\n    case 'ucs2':\n    case 'utf16le':\n      // UTF-16 represents each of Surrogate Pair by 2-bytes\n      this.surrogateSize = 2;\n      this.detectIncompleteChar = utf16DetectIncompleteChar;\n      break;\n    case 'base64':\n      // Base-64 stores 3 bytes in 4 chars, and pads the remainder.\n      this.surrogateSize = 3;\n      this.detectIncompleteChar = base64DetectIncompleteChar;\n      break;\n    default:\n      this.write = passThroughWrite;\n      return;\n  }\n\n  // Enough space to store all bytes of a single character. UTF-8 needs 4\n  // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate).\n  this.charBuffer = new Buffer(6);\n  // Number of bytes received for the current incomplete multi-byte character.\n  this.charReceived = 0;\n  // Number of bytes expected for the current incomplete multi-byte character.\n  this.charLength = 0;\n};\n\n\n// write decodes the given buffer and returns it as JS string that is\n// guaranteed to not contain any partial multi-byte characters. Any partial\n// character found at the end of the buffer is buffered up, and will be\n// returned when calling write again with the remaining bytes.\n//\n// Note: Converting a Buffer containing an orphan surrogate to a String\n// currently works, but converting a String to a Buffer (via `new Buffer`, or\n// Buffer#write) will replace incomplete surrogates with the unicode\n// replacement character. See https://codereview.chromium.org/121173009/ .\nStringDecoder.prototype.write = function(buffer) {\n  var charStr = '';\n  // if our last write ended with an incomplete multibyte character\n  while (this.charLength) {\n    // determine how many remaining bytes this buffer has to offer for this char\n    var available = (buffer.length >= this.charLength - this.charReceived) ?\n        this.charLength - this.charReceived :\n        buffer.length;\n\n    // add the new bytes to the char buffer\n    buffer.copy(this.charBuffer, this.charReceived, 0, available);\n    this.charReceived += available;\n\n    if (this.charReceived < this.charLength) {\n      // still not enough chars in this buffer? wait for more ...\n      return '';\n    }\n\n    // remove bytes belonging to the current character from the buffer\n    buffer = buffer.slice(available, buffer.length);\n\n    // get the character that was split\n    charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding);\n\n    // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character\n    var charCode = charStr.charCodeAt(charStr.length - 1);\n    if (charCode >= 0xD800 && charCode <= 0xDBFF) {\n      this.charLength += this.surrogateSize;\n      charStr = '';\n      continue;\n    }\n    this.charReceived = this.charLength = 0;\n\n    // if there are no more bytes in this buffer, just emit our char\n    if (buffer.length === 0) {\n      return charStr;\n    }\n    break;\n  }\n\n  // determine and set charLength / charReceived\n  this.detectIncompleteChar(buffer);\n\n  var end = buffer.length;\n  if (this.charLength) {\n    // buffer the incomplete character bytes we got\n    buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end);\n    end -= this.charReceived;\n  }\n\n  charStr += buffer.toString(this.encoding, 0, end);\n\n  var end = charStr.length - 1;\n  var charCode = charStr.charCodeAt(end);\n  // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character\n  if (charCode >= 0xD800 && charCode <= 0xDBFF) {\n    var size = this.surrogateSize;\n    this.charLength += size;\n    this.charReceived += size;\n    this.charBuffer.copy(this.charBuffer, size, 0, size);\n    buffer.copy(this.charBuffer, 0, 0, size);\n    return charStr.substring(0, end);\n  }\n\n  // or just emit the charStr\n  return charStr;\n};\n\n// detectIncompleteChar determines if there is an incomplete UTF-8 character at\n// the end of the given buffer. If so, it sets this.charLength to the byte\n// length that character, and sets this.charReceived to the number of bytes\n// that are available for this character.\nStringDecoder.prototype.detectIncompleteChar = function(buffer) {\n  // determine how many bytes we have to check at the end of this buffer\n  var i = (buffer.length >= 3) ? 3 : buffer.length;\n\n  // Figure out if one of the last i bytes of our buffer announces an\n  // incomplete char.\n  for (; i > 0; i--) {\n    var c = buffer[buffer.length - i];\n\n    // See http://en.wikipedia.org/wiki/UTF-8#Description\n\n    // 110XXXXX\n    if (i == 1 && c >> 5 == 0x06) {\n      this.charLength = 2;\n      break;\n    }\n\n    // 1110XXXX\n    if (i <= 2 && c >> 4 == 0x0E) {\n      this.charLength = 3;\n      break;\n    }\n\n    // 11110XXX\n    if (i <= 3 && c >> 3 == 0x1E) {\n      this.charLength = 4;\n      break;\n    }\n  }\n  this.charReceived = i;\n};\n\nStringDecoder.prototype.end = function(buffer) {\n  var res = '';\n  if (buffer && buffer.length)\n    res = this.write(buffer);\n\n  if (this.charReceived) {\n    var cr = this.charReceived;\n    var buf = this.charBuffer;\n    var enc = this.encoding;\n    res += buf.slice(0, cr).toString(enc);\n  }\n\n  return res;\n};\n\nfunction passThroughWrite(buffer) {\n  return buffer.toString(this.encoding);\n}\n\nfunction utf16DetectIncompleteChar(buffer) {\n  this.charReceived = buffer.length % 2;\n  this.charLength = this.charReceived ? 2 : 0;\n}\n\nfunction base64DetectIncompleteChar(buffer) {\n  this.charReceived = buffer.length % 3;\n  this.charLength = this.charReceived ? 3 : 0;\n}\n",
-    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nvar punycode = require('punycode');\n\nexports.parse = urlParse;\nexports.resolve = urlResolve;\nexports.resolveObject = urlResolveObject;\nexports.format = urlFormat;\n\nexports.Url = Url;\n\nfunction Url() {\n  this.protocol = null;\n  this.slashes = null;\n  this.auth = null;\n  this.host = null;\n  this.port = null;\n  this.hostname = null;\n  this.hash = null;\n  this.search = null;\n  this.query = null;\n  this.pathname = null;\n  this.path = null;\n  this.href = null;\n}\n\n// Reference: RFC 3986, RFC 1808, RFC 2396\n\n// define these here so at least they only have to be\n// compiled once on the first module load.\nvar protocolPattern = /^([a-z0-9.+-]+:)/i,\n    portPattern = /:[0-9]*$/,\n\n    // RFC 2396: characters reserved for delimiting URLs.\n    // We actually just auto-escape these.\n    delims = ['<', '>', '\"', '`', ' ', '\\r', '\\n', '\\t'],\n\n    // RFC 2396: characters not allowed for various reasons.\n    unwise = ['{', '}', '|', '\\\\', '^', '`'].concat(delims),\n\n    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.\n    autoEscape = ['\\''].concat(unwise),\n    // Characters that are never ever allowed in a hostname.\n    // Note that any invalid chars are also handled, but these\n    // are the ones that are *expected* to be seen, so we fast-path\n    // them.\n    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),\n    hostEndingChars = ['/', '?', '#'],\n    hostnameMaxLen = 255,\n    hostnamePartPattern = /^[a-z0-9A-Z_-]{0,63}$/,\n    hostnamePartStart = /^([a-z0-9A-Z_-]{0,63})(.*)$/,\n    // protocols that can allow \"unsafe\" and \"unwise\" chars.\n    unsafeProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that never have a hostname.\n    hostlessProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that always contain a // bit.\n    slashedProtocol = {\n      'http': true,\n      'https': true,\n      'ftp': true,\n      'gopher': true,\n      'file': true,\n      'http:': true,\n      'https:': true,\n      'ftp:': true,\n      'gopher:': true,\n      'file:': true\n    },\n    querystring = require('querystring');\n\nfunction urlParse(url, parseQueryString, slashesDenoteHost) {\n  if (url && isObject(url) && url instanceof Url) return url;\n\n  var u = new Url;\n  u.parse(url, parseQueryString, slashesDenoteHost);\n  return u;\n}\n\nUrl.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {\n  if (!isString(url)) {\n    throw new TypeError(\"Parameter 'url' must be a string, not \" + typeof url);\n  }\n\n  var rest = url;\n\n  // trim before proceeding.\n  // This is to support parse stuff like \"  http://foo.com  \\n\"\n  rest = rest.trim();\n\n  var proto = protocolPattern.exec(rest);\n  if (proto) {\n    proto = proto[0];\n    var lowerProto = proto.toLowerCase();\n    this.protocol = lowerProto;\n    rest = rest.substr(proto.length);\n  }\n\n  // figure out if it's got a host\n  // user@server is *always* interpreted as a hostname, and url\n  // resolution will treat //foo/bar as host=foo,path=bar because that's\n  // how the browser resolves relative URLs.\n  if (slashesDenoteHost || proto || rest.match(/^\\/\\/[^@\\/]+@[^@\\/]+/)) {\n    var slashes = rest.substr(0, 2) === '//';\n    if (slashes && !(proto && hostlessProtocol[proto])) {\n      rest = rest.substr(2);\n      this.slashes = true;\n    }\n  }\n\n  if (!hostlessProtocol[proto] &&\n      (slashes || (proto && !slashedProtocol[proto]))) {\n\n    // there's a hostname.\n    // the first instance of /, ?, ;, or # ends the host.\n    //\n    // If there is an @ in the hostname, then non-host chars *are* allowed\n    // to the left of the last @ sign, unless some host-ending character\n    // comes *before* the @-sign.\n    // URLs are obnoxious.\n    //\n    // ex:\n    // http://a@b@c/ => user:a@b host:c\n    // http://a@b?@c => user:a host:c path:/?@c\n\n    // v0.12 TODO(isaacs): This is not quite how Chrome does things.\n    // Review our test case against browsers more comprehensively.\n\n    // find the first instance of any hostEndingChars\n    var hostEnd = -1;\n    for (var i = 0; i < hostEndingChars.length; i++) {\n      var hec = rest.indexOf(hostEndingChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n\n    // at this point, either we have an explicit point where the\n    // auth portion cannot go past, or the last @ char is the decider.\n    var auth, atSign;\n    if (hostEnd === -1) {\n      // atSign can be anywhere.\n      atSign = rest.lastIndexOf('@');\n    } else {\n      // atSign must be in auth portion.\n      // http://a@b/c@d => host:b auth:a path:/c@d\n      atSign = rest.lastIndexOf('@', hostEnd);\n    }\n\n    // Now we have a portion which is definitely the auth.\n    // Pull that off.\n    if (atSign !== -1) {\n      auth = rest.slice(0, atSign);\n      rest = rest.slice(atSign + 1);\n      this.auth = decodeURIComponent(auth);\n    }\n\n    // the host is the remaining to the left of the first non-host char\n    hostEnd = -1;\n    for (var i = 0; i < nonHostChars.length; i++) {\n      var hec = rest.indexOf(nonHostChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n    // if we still have not hit it, then the entire thing is a host.\n    if (hostEnd === -1)\n      hostEnd = rest.length;\n\n    this.host = rest.slice(0, hostEnd);\n    rest = rest.slice(hostEnd);\n\n    // pull out port.\n    this.parseHost();\n\n    // we've indicated that there is a hostname,\n    // so even if it's empty, it has to be present.\n    this.hostname = this.hostname || '';\n\n    // if hostname begins with [ and ends with ]\n    // assume that it's an IPv6 address.\n    var ipv6Hostname = this.hostname[0] === '[' &&\n        this.hostname[this.hostname.length - 1] === ']';\n\n    // validate a little.\n    if (!ipv6Hostname) {\n      var hostparts = this.hostname.split(/\\./);\n      for (var i = 0, l = hostparts.length; i < l; i++) {\n        var part = hostparts[i];\n        if (!part) continue;\n        if (!part.match(hostnamePartPattern)) {\n          var newpart = '';\n          for (var j = 0, k = part.length; j < k; j++) {\n            if (part.charCodeAt(j) > 127) {\n              // we replace non-ASCII char with a temporary placeholder\n              // we need this to make sure size of hostname is not\n              // broken by replacing non-ASCII by nothing\n              newpart += 'x';\n            } else {\n              newpart += part[j];\n            }\n          }\n          // we test again with ASCII char only\n          if (!newpart.match(hostnamePartPattern)) {\n            var validParts = hostparts.slice(0, i);\n            var notHost = hostparts.slice(i + 1);\n            var bit = part.match(hostnamePartStart);\n            if (bit) {\n              validParts.push(bit[1]);\n              notHost.unshift(bit[2]);\n            }\n            if (notHost.length) {\n              rest = '/' + notHost.join('.') + rest;\n            }\n            this.hostname = validParts.join('.');\n            break;\n          }\n        }\n      }\n    }\n\n    if (this.hostname.length > hostnameMaxLen) {\n      this.hostname = '';\n    } else {\n      // hostnames are always lower case.\n      this.hostname = this.hostname.toLowerCase();\n    }\n\n    if (!ipv6Hostname) {\n      // IDNA Support: Returns a puny coded representation of \"domain\".\n      // It only converts the part of the domain name that\n      // has non ASCII characters. I.e. it dosent matter if\n      // you call it with a domain that already is in ASCII.\n      var domainArray = this.hostname.split('.');\n      var newOut = [];\n      for (var i = 0; i < domainArray.length; ++i) {\n        var s = domainArray[i];\n        newOut.push(s.match(/[^A-Za-z0-9_-]/) ?\n            'xn--' + punycode.encode(s) : s);\n      }\n      this.hostname = newOut.join('.');\n    }\n\n    var p = this.port ? ':' + this.port : '';\n    var h = this.hostname || '';\n    this.host = h + p;\n    this.href += this.host;\n\n    // strip [ and ] from the hostname\n    // the host field still retains them, though\n    if (ipv6Hostname) {\n      this.hostname = this.hostname.substr(1, this.hostname.length - 2);\n      if (rest[0] !== '/') {\n        rest = '/' + rest;\n      }\n    }\n  }\n\n  // now rest is set to the post-host stuff.\n  // chop off any delim chars.\n  if (!unsafeProtocol[lowerProto]) {\n\n    // First, make 100% sure that any \"autoEscape\" chars get\n    // escaped, even if encodeURIComponent doesn't think they\n    // need to be.\n    for (var i = 0, l = autoEscape.length; i < l; i++) {\n      var ae = autoEscape[i];\n      var esc = encodeURIComponent(ae);\n      if (esc === ae) {\n        esc = escape(ae);\n      }\n      rest = rest.split(ae).join(esc);\n    }\n  }\n\n\n  // chop off from the tail first.\n  var hash = rest.indexOf('#');\n  if (hash !== -1) {\n    // got a fragment string.\n    this.hash = rest.substr(hash);\n    rest = rest.slice(0, hash);\n  }\n  var qm = rest.indexOf('?');\n  if (qm !== -1) {\n    this.search = rest.substr(qm);\n    this.query = rest.substr(qm + 1);\n    if (parseQueryString) {\n      this.query = querystring.parse(this.query);\n    }\n    rest = rest.slice(0, qm);\n  } else if (parseQueryString) {\n    // no query string, but parseQueryString still requested\n    this.search = '';\n    this.query = {};\n  }\n  if (rest) this.pathname = rest;\n  if (slashedProtocol[lowerProto] &&\n      this.hostname && !this.pathname) {\n    this.pathname = '/';\n  }\n\n  //to support http.request\n  if (this.pathname || this.search) {\n    var p = this.pathname || '';\n    var s = this.search || '';\n    this.path = p + s;\n  }\n\n  // finally, reconstruct the href based on what has been validated.\n  this.href = this.format();\n  return this;\n};\n\n// format a parsed object into a url string\nfunction urlFormat(obj) {\n  // ensure it's an object, and not a string url.\n  // If it's an obj, this is a no-op.\n  // this way, you can call url_format() on strings\n  // to clean up potentially wonky urls.\n  if (isString(obj)) obj = urlParse(obj);\n  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);\n  return obj.format();\n}\n\nUrl.prototype.format = function() {\n  var auth = this.auth || '';\n  if (auth) {\n    auth = encodeURIComponent(auth);\n    auth = auth.replace(/%3A/i, ':');\n    auth += '@';\n  }\n\n  var protocol = this.protocol || '',\n      pathname = this.pathname || '',\n      hash = this.hash || '',\n      host = false,\n      query = '';\n\n  if (this.host) {\n    host = auth + this.host;\n  } else if (this.hostname) {\n    host = auth + (this.hostname.indexOf(':') === -1 ?\n        this.hostname :\n        '[' + this.hostname + ']');\n    if (this.port) {\n      host += ':' + this.port;\n    }\n  }\n\n  if (this.query &&\n      isObject(this.query) &&\n      Object.keys(this.query).length) {\n    query = querystring.stringify(this.query);\n  }\n\n  var search = this.search || (query && ('?' + query)) || '';\n\n  if (protocol && protocol.substr(-1) !== ':') protocol += ':';\n\n  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.\n  // unless they had them to begin with.\n  if (this.slashes ||\n      (!protocol || slashedProtocol[protocol]) && host !== false) {\n    host = '//' + (host || '');\n    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;\n  } else if (!host) {\n    host = '';\n  }\n\n  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;\n  if (search && search.charAt(0) !== '?') search = '?' + search;\n\n  pathname = pathname.replace(/[?#]/g, function(match) {\n    return encodeURIComponent(match);\n  });\n  search = search.replace('#', '%23');\n\n  return protocol + host + pathname + search + hash;\n};\n\nfunction urlResolve(source, relative) {\n  return urlParse(source, false, true).resolve(relative);\n}\n\nUrl.prototype.resolve = function(relative) {\n  return this.resolveObject(urlParse(relative, false, true)).format();\n};\n\nfunction urlResolveObject(source, relative) {\n  if (!source) return relative;\n  return urlParse(source, false, true).resolveObject(relative);\n}\n\nUrl.prototype.resolveObject = function(relative) {\n  if (isString(relative)) {\n    var rel = new Url();\n    rel.parse(relative, false, true);\n    relative = rel;\n  }\n\n  var result = new Url();\n  Object.keys(this).forEach(function(k) {\n    result[k] = this[k];\n  }, this);\n\n  // hash is always overridden, no matter what.\n  // even href=\"\" will remove it.\n  result.hash = relative.hash;\n\n  // if the relative url is empty, then there's nothing left to do here.\n  if (relative.href === '') {\n    result.href = result.format();\n    return result;\n  }\n\n  // hrefs like //foo/bar always cut to the protocol.\n  if (relative.slashes && !relative.protocol) {\n    // take everything except the protocol from relative\n    Object.keys(relative).forEach(function(k) {\n      if (k !== 'protocol')\n        result[k] = relative[k];\n    });\n\n    //urlParse appends trailing / to urls like http://www.example.com\n    if (slashedProtocol[result.protocol] &&\n        result.hostname && !result.pathname) {\n      result.path = result.pathname = '/';\n    }\n\n    result.href = result.format();\n    return result;\n  }\n\n  if (relative.protocol && relative.protocol !== result.protocol) {\n    // if it's a known url protocol, then changing\n    // the protocol does weird things\n    // first, if it's not file:, then we MUST have a host,\n    // and if there was a path\n    // to begin with, then we MUST have a path.\n    // if it is file:, then the host is dropped,\n    // because that's known to be hostless.\n    // anything else is assumed to be absolute.\n    if (!slashedProtocol[relative.protocol]) {\n      Object.keys(relative).forEach(function(k) {\n        result[k] = relative[k];\n      });\n      result.href = result.format();\n      return result;\n    }\n\n    result.protocol = relative.protocol;\n    if (!relative.host && !hostlessProtocol[relative.protocol]) {\n      var relPath = (relative.pathname || '').split('/');\n      while (relPath.length && !(relative.host = relPath.shift()));\n      if (!relative.host) relative.host = '';\n      if (!relative.hostname) relative.hostname = '';\n      if (relPath[0] !== '') relPath.unshift('');\n      if (relPath.length < 2) relPath.unshift('');\n      result.pathname = relPath.join('/');\n    } else {\n      result.pathname = relative.pathname;\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    result.host = relative.host || '';\n    result.auth = relative.auth;\n    result.hostname = relative.hostname || relative.host;\n    result.port = relative.port;\n    // to support http.request\n    if (result.pathname || result.search) {\n      var p = result.pathname || '';\n      var s = result.search || '';\n      result.path = p + s;\n    }\n    result.slashes = result.slashes || relative.slashes;\n    result.href = result.format();\n    return result;\n  }\n\n  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),\n      isRelAbs = (\n          relative.host ||\n          relative.pathname && relative.pathname.charAt(0) === '/'\n      ),\n      mustEndAbs = (isRelAbs || isSourceAbs ||\n                    (result.host && relative.pathname)),\n      removeAllDots = mustEndAbs,\n      srcPath = result.pathname && result.pathname.split('/') || [],\n      relPath = relative.pathname && relative.pathname.split('/') || [],\n      psychotic = result.protocol && !slashedProtocol[result.protocol];\n\n  // if the url is a non-slashed url, then relative\n  // links like ../.. should be able\n  // to crawl up to the hostname, as well.  This is strange.\n  // result.protocol has already been set by now.\n  // Later on, put the first path part into the host field.\n  if (psychotic) {\n    result.hostname = '';\n    result.port = null;\n    if (result.host) {\n      if (srcPath[0] === '') srcPath[0] = result.host;\n      else srcPath.unshift(result.host);\n    }\n    result.host = '';\n    if (relative.protocol) {\n      relative.hostname = null;\n      relative.port = null;\n      if (relative.host) {\n        if (relPath[0] === '') relPath[0] = relative.host;\n        else relPath.unshift(relative.host);\n      }\n      relative.host = null;\n    }\n    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');\n  }\n\n  if (isRelAbs) {\n    // it's absolute.\n    result.host = (relative.host || relative.host === '') ?\n                  relative.host : result.host;\n    result.hostname = (relative.hostname || relative.hostname === '') ?\n                      relative.hostname : result.hostname;\n    result.search = relative.search;\n    result.query = relative.query;\n    srcPath = relPath;\n    // fall through to the dot-handling below.\n  } else if (relPath.length) {\n    // it's relative\n    // throw away the existing file, and take the new path instead.\n    if (!srcPath) srcPath = [];\n    srcPath.pop();\n    srcPath = srcPath.concat(relPath);\n    result.search = relative.search;\n    result.query = relative.query;\n  } else if (!isNullOrUndefined(relative.search)) {\n    // just pull out the search.\n    // like href='?foo'.\n    // Put this after the other two cases because it simplifies the booleans\n    if (psychotic) {\n      result.hostname = result.host = srcPath.shift();\n      //occationaly the auth can get stuck only in host\n      //this especialy happens in cases like\n      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n      var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                       result.host.split('@') : false;\n      if (authInHost) {\n        result.auth = authInHost.shift();\n        result.host = result.hostname = authInHost.shift();\n      }\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    //to support http.request\n    if (!isNull(result.pathname) || !isNull(result.search)) {\n      result.path = (result.pathname ? result.pathname : '') +\n                    (result.search ? result.search : '');\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  if (!srcPath.length) {\n    // no path at all.  easy.\n    // we've already handled the other stuff above.\n    result.pathname = null;\n    //to support http.request\n    if (result.search) {\n      result.path = '/' + result.search;\n    } else {\n      result.path = null;\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  // if a url ENDs in . or .., then it must get a trailing slash.\n  // however, if it ends in anything else non-slashy,\n  // then it must NOT get a trailing slash.\n  var last = srcPath.slice(-1)[0];\n  var hasTrailingSlash = (\n      (result.host || relative.host) && (last === '.' || last === '..') ||\n      last === '');\n\n  // strip single dots, resolve double dots to parent dir\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = srcPath.length; i >= 0; i--) {\n    last = srcPath[i];\n    if (last == '.') {\n      srcPath.splice(i, 1);\n    } else if (last === '..') {\n      srcPath.splice(i, 1);\n      up++;\n    } else if (up) {\n      srcPath.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (!mustEndAbs && !removeAllDots) {\n    for (; up--; up) {\n      srcPath.unshift('..');\n    }\n  }\n\n  if (mustEndAbs && srcPath[0] !== '' &&\n      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {\n    srcPath.unshift('');\n  }\n\n  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {\n    srcPath.push('');\n  }\n\n  var isAbsolute = srcPath[0] === '' ||\n      (srcPath[0] && srcPath[0].charAt(0) === '/');\n\n  // put the host back\n  if (psychotic) {\n    result.hostname = result.host = isAbsolute ? '' :\n                                    srcPath.length ? srcPath.shift() : '';\n    //occationaly the auth can get stuck only in host\n    //this especialy happens in cases like\n    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n    var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                     result.host.split('@') : false;\n    if (authInHost) {\n      result.auth = authInHost.shift();\n      result.host = result.hostname = authInHost.shift();\n    }\n  }\n\n  mustEndAbs = mustEndAbs || (result.host && srcPath.length);\n\n  if (mustEndAbs && !isAbsolute) {\n    srcPath.unshift('');\n  }\n\n  if (!srcPath.length) {\n    result.pathname = null;\n    result.path = null;\n  } else {\n    result.pathname = srcPath.join('/');\n  }\n\n  //to support request.http\n  if (!isNull(result.pathname) || !isNull(result.search)) {\n    result.path = (result.pathname ? result.pathname : '') +\n                  (result.search ? result.search : '');\n  }\n  result.auth = relative.auth || result.auth;\n  result.slashes = result.slashes || relative.slashes;\n  result.href = result.format();\n  return result;\n};\n\nUrl.prototype.parseHost = function() {\n  var host = this.host;\n  var port = portPattern.exec(host);\n  if (port) {\n    port = port[0];\n    if (port !== ':') {\n      this.port = port.substr(1);\n    }\n    host = host.substr(0, host.length - port.length);\n  }\n  if (host) this.hostname = host;\n};\n\nfunction isString(arg) {\n  return typeof arg === \"string\";\n}\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\n\nfunction isNull(arg) {\n  return arg === null;\n}\nfunction isNullOrUndefined(arg) {\n  return  arg == null;\n}\n",
+    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\nvar punycode = require('punycode');\nvar util = require('./util');\n\nexports.parse = urlParse;\nexports.resolve = urlResolve;\nexports.resolveObject = urlResolveObject;\nexports.format = urlFormat;\n\nexports.Url = Url;\n\nfunction Url() {\n  this.protocol = null;\n  this.slashes = null;\n  this.auth = null;\n  this.host = null;\n  this.port = null;\n  this.hostname = null;\n  this.hash = null;\n  this.search = null;\n  this.query = null;\n  this.pathname = null;\n  this.path = null;\n  this.href = null;\n}\n\n// Reference: RFC 3986, RFC 1808, RFC 2396\n\n// define these here so at least they only have to be\n// compiled once on the first module load.\nvar protocolPattern = /^([a-z0-9.+-]+:)/i,\n    portPattern = /:[0-9]*$/,\n\n    // Special case for a simple path URL\n    simplePathPattern = /^(\\/\\/?(?!\\/)[^\\?\\s]*)(\\?[^\\s]*)?$/,\n\n    // RFC 2396: characters reserved for delimiting URLs.\n    // We actually just auto-escape these.\n    delims = ['<', '>', '\"', '`', ' ', '\\r', '\\n', '\\t'],\n\n    // RFC 2396: characters not allowed for various reasons.\n    unwise = ['{', '}', '|', '\\\\', '^', '`'].concat(delims),\n\n    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.\n    autoEscape = ['\\''].concat(unwise),\n    // Characters that are never ever allowed in a hostname.\n    // Note that any invalid chars are also handled, but these\n    // are the ones that are *expected* to be seen, so we fast-path\n    // them.\n    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),\n    hostEndingChars = ['/', '?', '#'],\n    hostnameMaxLen = 255,\n    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,\n    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,\n    // protocols that can allow \"unsafe\" and \"unwise\" chars.\n    unsafeProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that never have a hostname.\n    hostlessProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that always contain a // bit.\n    slashedProtocol = {\n      'http': true,\n      'https': true,\n      'ftp': true,\n      'gopher': true,\n      'file': true,\n      'http:': true,\n      'https:': true,\n      'ftp:': true,\n      'gopher:': true,\n      'file:': true\n    },\n    querystring = require('querystring');\n\nfunction urlParse(url, parseQueryString, slashesDenoteHost) {\n  if (url && util.isObject(url) && url instanceof Url) return url;\n\n  var u = new Url;\n  u.parse(url, parseQueryString, slashesDenoteHost);\n  return u;\n}\n\nUrl.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {\n  if (!util.isString(url)) {\n    throw new TypeError(\"Parameter 'url' must be a string, not \" + typeof url);\n  }\n\n  // Copy chrome, IE, opera backslash-handling behavior.\n  // Back slashes before the query string get converted to forward slashes\n  // See: https://code.google.com/p/chromium/issues/detail?id=25916\n  var queryIndex = url.indexOf('?'),\n      splitter =\n          (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',\n      uSplit = url.split(splitter),\n      slashRegex = /\\\\/g;\n  uSplit[0] = uSplit[0].replace(slashRegex, '/');\n  url = uSplit.join(splitter);\n\n  var rest = url;\n\n  // trim before proceeding.\n  // This is to support parse stuff like \"  http://foo.com  \\n\"\n  rest = rest.trim();\n\n  if (!slashesDenoteHost && url.split('#').length === 1) {\n    // Try fast path regexp\n    var simplePath = simplePathPattern.exec(rest);\n    if (simplePath) {\n      this.path = rest;\n      this.href = rest;\n      this.pathname = simplePath[1];\n      if (simplePath[2]) {\n        this.search = simplePath[2];\n        if (parseQueryString) {\n          this.query = querystring.parse(this.search.substr(1));\n        } else {\n          this.query = this.search.substr(1);\n        }\n      } else if (parseQueryString) {\n        this.search = '';\n        this.query = {};\n      }\n      return this;\n    }\n  }\n\n  var proto = protocolPattern.exec(rest);\n  if (proto) {\n    proto = proto[0];\n    var lowerProto = proto.toLowerCase();\n    this.protocol = lowerProto;\n    rest = rest.substr(proto.length);\n  }\n\n  // figure out if it's got a host\n  // user@server is *always* interpreted as a hostname, and url\n  // resolution will treat //foo/bar as host=foo,path=bar because that's\n  // how the browser resolves relative URLs.\n  if (slashesDenoteHost || proto || rest.match(/^\\/\\/[^@\\/]+@[^@\\/]+/)) {\n    var slashes = rest.substr(0, 2) === '//';\n    if (slashes && !(proto && hostlessProtocol[proto])) {\n      rest = rest.substr(2);\n      this.slashes = true;\n    }\n  }\n\n  if (!hostlessProtocol[proto] &&\n      (slashes || (proto && !slashedProtocol[proto]))) {\n\n    // there's a hostname.\n    // the first instance of /, ?, ;, or # ends the host.\n    //\n    // If there is an @ in the hostname, then non-host chars *are* allowed\n    // to the left of the last @ sign, unless some host-ending character\n    // comes *before* the @-sign.\n    // URLs are obnoxious.\n    //\n    // ex:\n    // http://a@b@c/ => user:a@b host:c\n    // http://a@b?@c => user:a host:c path:/?@c\n\n    // v0.12 TODO(isaacs): This is not quite how Chrome does things.\n    // Review our test case against browsers more comprehensively.\n\n    // find the first instance of any hostEndingChars\n    var hostEnd = -1;\n    for (var i = 0; i < hostEndingChars.length; i++) {\n      var hec = rest.indexOf(hostEndingChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n\n    // at this point, either we have an explicit point where the\n    // auth portion cannot go past, or the last @ char is the decider.\n    var auth, atSign;\n    if (hostEnd === -1) {\n      // atSign can be anywhere.\n      atSign = rest.lastIndexOf('@');\n    } else {\n      // atSign must be in auth portion.\n      // http://a@b/c@d => host:b auth:a path:/c@d\n      atSign = rest.lastIndexOf('@', hostEnd);\n    }\n\n    // Now we have a portion which is definitely the auth.\n    // Pull that off.\n    if (atSign !== -1) {\n      auth = rest.slice(0, atSign);\n      rest = rest.slice(atSign + 1);\n      this.auth = decodeURIComponent(auth);\n    }\n\n    // the host is the remaining to the left of the first non-host char\n    hostEnd = -1;\n    for (var i = 0; i < nonHostChars.length; i++) {\n      var hec = rest.indexOf(nonHostChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n    // if we still have not hit it, then the entire thing is a host.\n    if (hostEnd === -1)\n      hostEnd = rest.length;\n\n    this.host = rest.slice(0, hostEnd);\n    rest = rest.slice(hostEnd);\n\n    // pull out port.\n    this.parseHost();\n\n    // we've indicated that there is a hostname,\n    // so even if it's empty, it has to be present.\n    this.hostname = this.hostname || '';\n\n    // if hostname begins with [ and ends with ]\n    // assume that it's an IPv6 address.\n    var ipv6Hostname = this.hostname[0] === '[' &&\n        this.hostname[this.hostname.length - 1] === ']';\n\n    // validate a little.\n    if (!ipv6Hostname) {\n      var hostparts = this.hostname.split(/\\./);\n      for (var i = 0, l = hostparts.length; i < l; i++) {\n        var part = hostparts[i];\n        if (!part) continue;\n        if (!part.match(hostnamePartPattern)) {\n          var newpart = '';\n          for (var j = 0, k = part.length; j < k; j++) {\n            if (part.charCodeAt(j) > 127) {\n              // we replace non-ASCII char with a temporary placeholder\n              // we need this to make sure size of hostname is not\n              // broken by replacing non-ASCII by nothing\n              newpart += 'x';\n            } else {\n              newpart += part[j];\n            }\n          }\n          // we test again with ASCII char only\n          if (!newpart.match(hostnamePartPattern)) {\n            var validParts = hostparts.slice(0, i);\n            var notHost = hostparts.slice(i + 1);\n            var bit = part.match(hostnamePartStart);\n            if (bit) {\n              validParts.push(bit[1]);\n              notHost.unshift(bit[2]);\n            }\n            if (notHost.length) {\n              rest = '/' + notHost.join('.') + rest;\n            }\n            this.hostname = validParts.join('.');\n            break;\n          }\n        }\n      }\n    }\n\n    if (this.hostname.length > hostnameMaxLen) {\n      this.hostname = '';\n    } else {\n      // hostnames are always lower case.\n      this.hostname = this.hostname.toLowerCase();\n    }\n\n    if (!ipv6Hostname) {\n      // IDNA Support: Returns a punycoded representation of \"domain\".\n      // It only converts parts of the domain name that\n      // have non-ASCII characters, i.e. it doesn't matter if\n      // you call it with a domain that already is ASCII-only.\n      this.hostname = punycode.toASCII(this.hostname);\n    }\n\n    var p = this.port ? ':' + this.port : '';\n    var h = this.hostname || '';\n    this.host = h + p;\n    this.href += this.host;\n\n    // strip [ and ] from the hostname\n    // the host field still retains them, though\n    if (ipv6Hostname) {\n      this.hostname = this.hostname.substr(1, this.hostname.length - 2);\n      if (rest[0] !== '/') {\n        rest = '/' + rest;\n      }\n    }\n  }\n\n  // now rest is set to the post-host stuff.\n  // chop off any delim chars.\n  if (!unsafeProtocol[lowerProto]) {\n\n    // First, make 100% sure that any \"autoEscape\" chars get\n    // escaped, even if encodeURIComponent doesn't think they\n    // need to be.\n    for (var i = 0, l = autoEscape.length; i < l; i++) {\n      var ae = autoEscape[i];\n      if (rest.indexOf(ae) === -1)\n        continue;\n      var esc = encodeURIComponent(ae);\n      if (esc === ae) {\n        esc = escape(ae);\n      }\n      rest = rest.split(ae).join(esc);\n    }\n  }\n\n\n  // chop off from the tail first.\n  var hash = rest.indexOf('#');\n  if (hash !== -1) {\n    // got a fragment string.\n    this.hash = rest.substr(hash);\n    rest = rest.slice(0, hash);\n  }\n  var qm = rest.indexOf('?');\n  if (qm !== -1) {\n    this.search = rest.substr(qm);\n    this.query = rest.substr(qm + 1);\n    if (parseQueryString) {\n      this.query = querystring.parse(this.query);\n    }\n    rest = rest.slice(0, qm);\n  } else if (parseQueryString) {\n    // no query string, but parseQueryString still requested\n    this.search = '';\n    this.query = {};\n  }\n  if (rest) this.pathname = rest;\n  if (slashedProtocol[lowerProto] &&\n      this.hostname && !this.pathname) {\n    this.pathname = '/';\n  }\n\n  //to support http.request\n  if (this.pathname || this.search) {\n    var p = this.pathname || '';\n    var s = this.search || '';\n    this.path = p + s;\n  }\n\n  // finally, reconstruct the href based on what has been validated.\n  this.href = this.format();\n  return this;\n};\n\n// format a parsed object into a url string\nfunction urlFormat(obj) {\n  // ensure it's an object, and not a string url.\n  // If it's an obj, this is a no-op.\n  // this way, you can call url_format() on strings\n  // to clean up potentially wonky urls.\n  if (util.isString(obj)) obj = urlParse(obj);\n  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);\n  return obj.format();\n}\n\nUrl.prototype.format = function() {\n  var auth = this.auth || '';\n  if (auth) {\n    auth = encodeURIComponent(auth);\n    auth = auth.replace(/%3A/i, ':');\n    auth += '@';\n  }\n\n  var protocol = this.protocol || '',\n      pathname = this.pathname || '',\n      hash = this.hash || '',\n      host = false,\n      query = '';\n\n  if (this.host) {\n    host = auth + this.host;\n  } else if (this.hostname) {\n    host = auth + (this.hostname.indexOf(':') === -1 ?\n        this.hostname :\n        '[' + this.hostname + ']');\n    if (this.port) {\n      host += ':' + this.port;\n    }\n  }\n\n  if (this.query &&\n      util.isObject(this.query) &&\n      Object.keys(this.query).length) {\n    query = querystring.stringify(this.query);\n  }\n\n  var search = this.search || (query && ('?' + query)) || '';\n\n  if (protocol && protocol.substr(-1) !== ':') protocol += ':';\n\n  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.\n  // unless they had them to begin with.\n  if (this.slashes ||\n      (!protocol || slashedProtocol[protocol]) && host !== false) {\n    host = '//' + (host || '');\n    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;\n  } else if (!host) {\n    host = '';\n  }\n\n  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;\n  if (search && search.charAt(0) !== '?') search = '?' + search;\n\n  pathname = pathname.replace(/[?#]/g, function(match) {\n    return encodeURIComponent(match);\n  });\n  search = search.replace('#', '%23');\n\n  return protocol + host + pathname + search + hash;\n};\n\nfunction urlResolve(source, relative) {\n  return urlParse(source, false, true).resolve(relative);\n}\n\nUrl.prototype.resolve = function(relative) {\n  return this.resolveObject(urlParse(relative, false, true)).format();\n};\n\nfunction urlResolveObject(source, relative) {\n  if (!source) return relative;\n  return urlParse(source, false, true).resolveObject(relative);\n}\n\nUrl.prototype.resolveObject = function(relative) {\n  if (util.isString(relative)) {\n    var rel = new Url();\n    rel.parse(relative, false, true);\n    relative = rel;\n  }\n\n  var result = new Url();\n  var tkeys = Object.keys(this);\n  for (var tk = 0; tk < tkeys.length; tk++) {\n    var tkey = tkeys[tk];\n    result[tkey] = this[tkey];\n  }\n\n  // hash is always overridden, no matter what.\n  // even href=\"\" will remove it.\n  result.hash = relative.hash;\n\n  // if the relative url is empty, then there's nothing left to do here.\n  if (relative.href === '') {\n    result.href = result.format();\n    return result;\n  }\n\n  // hrefs like //foo/bar always cut to the protocol.\n  if (relative.slashes && !relative.protocol) {\n    // take everything except the protocol from relative\n    var rkeys = Object.keys(relative);\n    for (var rk = 0; rk < rkeys.length; rk++) {\n      var rkey = rkeys[rk];\n      if (rkey !== 'protocol')\n        result[rkey] = relative[rkey];\n    }\n\n    //urlParse appends trailing / to urls like http://www.example.com\n    if (slashedProtocol[result.protocol] &&\n        result.hostname && !result.pathname) {\n      result.path = result.pathname = '/';\n    }\n\n    result.href = result.format();\n    return result;\n  }\n\n  if (relative.protocol && relative.protocol !== result.protocol) {\n    // if it's a known url protocol, then changing\n    // the protocol does weird things\n    // first, if it's not file:, then we MUST have a host,\n    // and if there was a path\n    // to begin with, then we MUST have a path.\n    // if it is file:, then the host is dropped,\n    // because that's known to be hostless.\n    // anything else is assumed to be absolute.\n    if (!slashedProtocol[relative.protocol]) {\n      var keys = Object.keys(relative);\n      for (var v = 0; v < keys.length; v++) {\n        var k = keys[v];\n        result[k] = relative[k];\n      }\n      result.href = result.format();\n      return result;\n    }\n\n    result.protocol = relative.protocol;\n    if (!relative.host && !hostlessProtocol[relative.protocol]) {\n      var relPath = (relative.pathname || '').split('/');\n      while (relPath.length && !(relative.host = relPath.shift()));\n      if (!relative.host) relative.host = '';\n      if (!relative.hostname) relative.hostname = '';\n      if (relPath[0] !== '') relPath.unshift('');\n      if (relPath.length < 2) relPath.unshift('');\n      result.pathname = relPath.join('/');\n    } else {\n      result.pathname = relative.pathname;\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    result.host = relative.host || '';\n    result.auth = relative.auth;\n    result.hostname = relative.hostname || relative.host;\n    result.port = relative.port;\n    // to support http.request\n    if (result.pathname || result.search) {\n      var p = result.pathname || '';\n      var s = result.search || '';\n      result.path = p + s;\n    }\n    result.slashes = result.slashes || relative.slashes;\n    result.href = result.format();\n    return result;\n  }\n\n  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),\n      isRelAbs = (\n          relative.host ||\n          relative.pathname && relative.pathname.charAt(0) === '/'\n      ),\n      mustEndAbs = (isRelAbs || isSourceAbs ||\n                    (result.host && relative.pathname)),\n      removeAllDots = mustEndAbs,\n      srcPath = result.pathname && result.pathname.split('/') || [],\n      relPath = relative.pathname && relative.pathname.split('/') || [],\n      psychotic = result.protocol && !slashedProtocol[result.protocol];\n\n  // if the url is a non-slashed url, then relative\n  // links like ../.. should be able\n  // to crawl up to the hostname, as well.  This is strange.\n  // result.protocol has already been set by now.\n  // Later on, put the first path part into the host field.\n  if (psychotic) {\n    result.hostname = '';\n    result.port = null;\n    if (result.host) {\n      if (srcPath[0] === '') srcPath[0] = result.host;\n      else srcPath.unshift(result.host);\n    }\n    result.host = '';\n    if (relative.protocol) {\n      relative.hostname = null;\n      relative.port = null;\n      if (relative.host) {\n        if (relPath[0] === '') relPath[0] = relative.host;\n        else relPath.unshift(relative.host);\n      }\n      relative.host = null;\n    }\n    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');\n  }\n\n  if (isRelAbs) {\n    // it's absolute.\n    result.host = (relative.host || relative.host === '') ?\n                  relative.host : result.host;\n    result.hostname = (relative.hostname || relative.hostname === '') ?\n                      relative.hostname : result.hostname;\n    result.search = relative.search;\n    result.query = relative.query;\n    srcPath = relPath;\n    // fall through to the dot-handling below.\n  } else if (relPath.length) {\n    // it's relative\n    // throw away the existing file, and take the new path instead.\n    if (!srcPath) srcPath = [];\n    srcPath.pop();\n    srcPath = srcPath.concat(relPath);\n    result.search = relative.search;\n    result.query = relative.query;\n  } else if (!util.isNullOrUndefined(relative.search)) {\n    // just pull out the search.\n    // like href='?foo'.\n    // Put this after the other two cases because it simplifies the booleans\n    if (psychotic) {\n      result.hostname = result.host = srcPath.shift();\n      //occationaly the auth can get stuck only in host\n      //this especially happens in cases like\n      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n      var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                       result.host.split('@') : false;\n      if (authInHost) {\n        result.auth = authInHost.shift();\n        result.host = result.hostname = authInHost.shift();\n      }\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    //to support http.request\n    if (!util.isNull(result.pathname) || !util.isNull(result.search)) {\n      result.path = (result.pathname ? result.pathname : '') +\n                    (result.search ? result.search : '');\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  if (!srcPath.length) {\n    // no path at all.  easy.\n    // we've already handled the other stuff above.\n    result.pathname = null;\n    //to support http.request\n    if (result.search) {\n      result.path = '/' + result.search;\n    } else {\n      result.path = null;\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  // if a url ENDs in . or .., then it must get a trailing slash.\n  // however, if it ends in anything else non-slashy,\n  // then it must NOT get a trailing slash.\n  var last = srcPath.slice(-1)[0];\n  var hasTrailingSlash = (\n      (result.host || relative.host || srcPath.length > 1) &&\n      (last === '.' || last === '..') || last === '');\n\n  // strip single dots, resolve double dots to parent dir\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = srcPath.length; i >= 0; i--) {\n    last = srcPath[i];\n    if (last === '.') {\n      srcPath.splice(i, 1);\n    } else if (last === '..') {\n      srcPath.splice(i, 1);\n      up++;\n    } else if (up) {\n      srcPath.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (!mustEndAbs && !removeAllDots) {\n    for (; up--; up) {\n      srcPath.unshift('..');\n    }\n  }\n\n  if (mustEndAbs && srcPath[0] !== '' &&\n      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {\n    srcPath.unshift('');\n  }\n\n  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {\n    srcPath.push('');\n  }\n\n  var isAbsolute = srcPath[0] === '' ||\n      (srcPath[0] && srcPath[0].charAt(0) === '/');\n\n  // put the host back\n  if (psychotic) {\n    result.hostname = result.host = isAbsolute ? '' :\n                                    srcPath.length ? srcPath.shift() : '';\n    //occationaly the auth can get stuck only in host\n    //this especially happens in cases like\n    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n    var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                     result.host.split('@') : false;\n    if (authInHost) {\n      result.auth = authInHost.shift();\n      result.host = result.hostname = authInHost.shift();\n    }\n  }\n\n  mustEndAbs = mustEndAbs || (result.host && srcPath.length);\n\n  if (mustEndAbs && !isAbsolute) {\n    srcPath.unshift('');\n  }\n\n  if (!srcPath.length) {\n    result.pathname = null;\n    result.path = null;\n  } else {\n    result.pathname = srcPath.join('/');\n  }\n\n  //to support request.http\n  if (!util.isNull(result.pathname) || !util.isNull(result.search)) {\n    result.path = (result.pathname ? result.pathname : '') +\n                  (result.search ? result.search : '');\n  }\n  result.auth = relative.auth || result.auth;\n  result.slashes = result.slashes || relative.slashes;\n  result.href = result.format();\n  return result;\n};\n\nUrl.prototype.parseHost = function() {\n  var host = this.host;\n  var port = portPattern.exec(host);\n  if (port) {\n    port = port[0];\n    if (port !== ':') {\n      this.port = port.substr(1);\n    }\n    host = host.substr(0, host.length - port.length);\n  }\n  if (host) this.hostname = host;\n};\n",
+    "'use strict';\n\nmodule.exports = {\n  isString: function(arg) {\n    return typeof(arg) === 'string';\n  },\n  isObject: function(arg) {\n    return typeof(arg) === 'object' && arg !== null;\n  },\n  isNull: function(arg) {\n    return arg === null;\n  },\n  isNullOrUndefined: function(arg) {\n    return arg == null;\n  }\n};\n",
     "\n/**\n * Module exports.\n */\n\nmodule.exports = deprecate;\n\n/**\n * Mark that a method should not be used.\n * Returns a modified function which warns once by default.\n *\n * If `localStorage.noDeprecation = true` is set, then it is a no-op.\n *\n * If `localStorage.throwDeprecation = true` is set, then deprecated functions\n * will throw an Error when invoked.\n *\n * If `localStorage.traceDeprecation = true` is set, then deprecated functions\n * will invoke `console.trace()` instead of `console.error()`.\n *\n * @param {Function} fn - the function to deprecate\n * @param {String} msg - the string to print to the console when `fn` is invoked\n * @returns {Function} a new \"deprecated\" version of `fn`\n * @api public\n */\n\nfunction deprecate (fn, msg) {\n  if (config('noDeprecation')) {\n    return fn;\n  }\n\n  var warned = false;\n  function deprecated() {\n    if (!warned) {\n      if (config('throwDeprecation')) {\n        throw new Error(msg);\n      } else if (config('traceDeprecation')) {\n        console.trace(msg);\n      } else {\n        console.warn(msg);\n      }\n      warned = true;\n    }\n    return fn.apply(this, arguments);\n  }\n\n  return deprecated;\n}\n\n/**\n * Checks `localStorage` for boolean values for the given `name`.\n *\n * @param {String} name\n * @returns {Boolean}\n * @api private\n */\n\nfunction config (name) {\n  // accessing global.localStorage can trigger a DOMException in sandboxed iframes\n  try {\n    if (!global.localStorage) return false;\n  } catch (_) {\n    return false;\n  }\n  var val = global.localStorage[name];\n  if (null == val) return false;\n  return String(val).toLowerCase() === 'true';\n}\n",
     "module.exports = function isBuffer(arg) {\n  return arg && typeof arg === 'object'\n    && typeof arg.copy === 'function'\n    && typeof arg.fill === 'function'\n    && typeof arg.readUInt8 === 'function';\n}",
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nvar formatRegExp = /%[sdj%]/g;\nexports.format = function(f) {\n  if (!isString(f)) {\n    var objects = [];\n    for (var i = 0; i < arguments.length; i++) {\n      objects.push(inspect(arguments[i]));\n    }\n    return objects.join(' ');\n  }\n\n  var i = 1;\n  var args = arguments;\n  var len = args.length;\n  var str = String(f).replace(formatRegExp, function(x) {\n    if (x === '%%') return '%';\n    if (i >= len) return x;\n    switch (x) {\n      case '%s': return String(args[i++]);\n      case '%d': return Number(args[i++]);\n      case '%j':\n        try {\n          return JSON.stringify(args[i++]);\n        } catch (_) {\n          return '[Circular]';\n        }\n      default:\n        return x;\n    }\n  });\n  for (var x = args[i]; i < len; x = args[++i]) {\n    if (isNull(x) || !isObject(x)) {\n      str += ' ' + x;\n    } else {\n      str += ' ' + inspect(x);\n    }\n  }\n  return str;\n};\n\n\n// Mark that a method should not be used.\n// Returns a modified function which warns once by default.\n// If --no-deprecation is set, then it is a no-op.\nexports.deprecate = function(fn, msg) {\n  // Allow for deprecating things in the process of starting up.\n  if (isUndefined(global.process)) {\n    return function() {\n      return exports.deprecate(fn, msg).apply(this, arguments);\n    };\n  }\n\n  if (process.noDeprecation === true) {\n    return fn;\n  }\n\n  var warned = false;\n  function deprecated() {\n    if (!warned) {\n      if (process.throwDeprecation) {\n        throw new Error(msg);\n      } else if (process.traceDeprecation) {\n        console.trace(msg);\n      } else {\n        console.error(msg);\n      }\n      warned = true;\n    }\n    return fn.apply(this, arguments);\n  }\n\n  return deprecated;\n};\n\n\nvar debugs = {};\nvar debugEnviron;\nexports.debuglog = function(set) {\n  if (isUndefined(debugEnviron))\n    debugEnviron = process.env.NODE_DEBUG || '';\n  set = set.toUpperCase();\n  if (!debugs[set]) {\n    if (new RegExp('\\\\b' + set + '\\\\b', 'i').test(debugEnviron)) {\n      var pid = process.pid;\n      debugs[set] = function() {\n        var msg = exports.format.apply(exports, arguments);\n        console.error('%s %d: %s', set, pid, msg);\n      };\n    } else {\n      debugs[set] = function() {};\n    }\n  }\n  return debugs[set];\n};\n\n\n/**\n * Echos the value of a value. Trys to print the value out\n * in the best way possible given the different types.\n *\n * @param {Object} obj The object to print out.\n * @param {Object} opts Optional options object that alters the output.\n */\n/* legacy: obj, showHidden, depth, colors*/\nfunction inspect(obj, opts) {\n  // default options\n  var ctx = {\n    seen: [],\n    stylize: stylizeNoColor\n  };\n  // legacy...\n  if (arguments.length >= 3) ctx.depth = arguments[2];\n  if (arguments.length >= 4) ctx.colors = arguments[3];\n  if (isBoolean(opts)) {\n    // legacy...\n    ctx.showHidden = opts;\n  } else if (opts) {\n    // got an \"options\" object\n    exports._extend(ctx, opts);\n  }\n  // set default options\n  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;\n  if (isUndefined(ctx.depth)) ctx.depth = 2;\n  if (isUndefined(ctx.colors)) ctx.colors = false;\n  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;\n  if (ctx.colors) ctx.stylize = stylizeWithColor;\n  return formatValue(ctx, obj, ctx.depth);\n}\nexports.inspect = inspect;\n\n\n// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics\ninspect.colors = {\n  'bold' : [1, 22],\n  'italic' : [3, 23],\n  'underline' : [4, 24],\n  'inverse' : [7, 27],\n  'white' : [37, 39],\n  'grey' : [90, 39],\n  'black' : [30, 39],\n  'blue' : [34, 39],\n  'cyan' : [36, 39],\n  'green' : [32, 39],\n  'magenta' : [35, 39],\n  'red' : [31, 39],\n  'yellow' : [33, 39]\n};\n\n// Don't use 'blue' not visible on cmd.exe\ninspect.styles = {\n  'special': 'cyan',\n  'number': 'yellow',\n  'boolean': 'yellow',\n  'undefined': 'grey',\n  'null': 'bold',\n  'string': 'green',\n  'date': 'magenta',\n  // \"name\": intentionally not styling\n  'regexp': 'red'\n};\n\n\nfunction stylizeWithColor(str, styleType) {\n  var style = inspect.styles[styleType];\n\n  if (style) {\n    return '\\u001b[' + inspect.colors[style][0] + 'm' + str +\n           '\\u001b[' + inspect.colors[style][1] + 'm';\n  } else {\n    return str;\n  }\n}\n\n\nfunction stylizeNoColor(str, styleType) {\n  return str;\n}\n\n\nfunction arrayToHash(array) {\n  var hash = {};\n\n  array.forEach(function(val, idx) {\n    hash[val] = true;\n  });\n\n  return hash;\n}\n\n\nfunction formatValue(ctx, value, recurseTimes) {\n  // Provide a hook for user-specified inspect functions.\n  // Check that value is an object with an inspect function on it\n  if (ctx.customInspect &&\n      value &&\n      isFunction(value.inspect) &&\n      // Filter out the util module, it's inspect function is special\n      value.inspect !== exports.inspect &&\n      // Also filter out any prototype objects using the circular check.\n      !(value.constructor && value.constructor.prototype === value)) {\n    var ret = value.inspect(recurseTimes, ctx);\n    if (!isString(ret)) {\n      ret = formatValue(ctx, ret, recurseTimes);\n    }\n    return ret;\n  }\n\n  // Primitive types cannot have properties\n  var primitive = formatPrimitive(ctx, value);\n  if (primitive) {\n    return primitive;\n  }\n\n  // Look up the keys of the object.\n  var keys = Object.keys(value);\n  var visibleKeys = arrayToHash(keys);\n\n  if (ctx.showHidden) {\n    keys = Object.getOwnPropertyNames(value);\n  }\n\n  // IE doesn't make error fields non-enumerable\n  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx\n  if (isError(value)\n      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {\n    return formatError(value);\n  }\n\n  // Some type of object without properties can be shortcutted.\n  if (keys.length === 0) {\n    if (isFunction(value)) {\n      var name = value.name ? ': ' + value.name : '';\n      return ctx.stylize('[Function' + name + ']', 'special');\n    }\n    if (isRegExp(value)) {\n      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');\n    }\n    if (isDate(value)) {\n      return ctx.stylize(Date.prototype.toString.call(value), 'date');\n    }\n    if (isError(value)) {\n      return formatError(value);\n    }\n  }\n\n  var base = '', array = false, braces = ['{', '}'];\n\n  // Make Array say that they are Array\n  if (isArray(value)) {\n    array = true;\n    braces = ['[', ']'];\n  }\n\n  // Make functions say that they are functions\n  if (isFunction(value)) {\n    var n = value.name ? ': ' + value.name : '';\n    base = ' [Function' + n + ']';\n  }\n\n  // Make RegExps say that they are RegExps\n  if (isRegExp(value)) {\n    base = ' ' + RegExp.prototype.toString.call(value);\n  }\n\n  // Make dates with properties first say the date\n  if (isDate(value)) {\n    base = ' ' + Date.prototype.toUTCString.call(value);\n  }\n\n  // Make error with message first say the error\n  if (isError(value)) {\n    base = ' ' + formatError(value);\n  }\n\n  if (keys.length === 0 && (!array || value.length == 0)) {\n    return braces[0] + base + braces[1];\n  }\n\n  if (recurseTimes < 0) {\n    if (isRegExp(value)) {\n      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');\n    } else {\n      return ctx.stylize('[Object]', 'special');\n    }\n  }\n\n  ctx.seen.push(value);\n\n  var output;\n  if (array) {\n    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);\n  } else {\n    output = keys.map(function(key) {\n      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);\n    });\n  }\n\n  ctx.seen.pop();\n\n  return reduceToSingleString(output, base, braces);\n}\n\n\nfunction formatPrimitive(ctx, value) {\n  if (isUndefined(value))\n    return ctx.stylize('undefined', 'undefined');\n  if (isString(value)) {\n    var simple = '\\'' + JSON.stringify(value).replace(/^\"|\"$/g, '')\n                                             .replace(/'/g, \"\\\\'\")\n                                             .replace(/\\\\\"/g, '\"') + '\\'';\n    return ctx.stylize(simple, 'string');\n  }\n  if (isNumber(value))\n    return ctx.stylize('' + value, 'number');\n  if (isBoolean(value))\n    return ctx.stylize('' + value, 'boolean');\n  // For some reason typeof null is \"object\", so special case here.\n  if (isNull(value))\n    return ctx.stylize('null', 'null');\n}\n\n\nfunction formatError(value) {\n  return '[' + Error.prototype.toString.call(value) + ']';\n}\n\n\nfunction formatArray(ctx, value, recurseTimes, visibleKeys, keys) {\n  var output = [];\n  for (var i = 0, l = value.length; i < l; ++i) {\n    if (hasOwnProperty(value, String(i))) {\n      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,\n          String(i), true));\n    } else {\n      output.push('');\n    }\n  }\n  keys.forEach(function(key) {\n    if (!key.match(/^\\d+$/)) {\n      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,\n          key, true));\n    }\n  });\n  return output;\n}\n\n\nfunction formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {\n  var name, str, desc;\n  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };\n  if (desc.get) {\n    if (desc.set) {\n      str = ctx.stylize('[Getter/Setter]', 'special');\n    } else {\n      str = ctx.stylize('[Getter]', 'special');\n    }\n  } else {\n    if (desc.set) {\n      str = ctx.stylize('[Setter]', 'special');\n    }\n  }\n  if (!hasOwnProperty(visibleKeys, key)) {\n    name = '[' + key + ']';\n  }\n  if (!str) {\n    if (ctx.seen.indexOf(desc.value) < 0) {\n      if (isNull(recurseTimes)) {\n        str = formatValue(ctx, desc.value, null);\n      } else {\n        str = formatValue(ctx, desc.value, recurseTimes - 1);\n      }\n      if (str.indexOf('\\n') > -1) {\n        if (array) {\n          str = str.split('\\n').map(function(line) {\n            return '  ' + line;\n          }).join('\\n').substr(2);\n        } else {\n          str = '\\n' + str.split('\\n').map(function(line) {\n            return '   ' + line;\n          }).join('\\n');\n        }\n      }\n    } else {\n      str = ctx.stylize('[Circular]', 'special');\n    }\n  }\n  if (isUndefined(name)) {\n    if (array && key.match(/^\\d+$/)) {\n      return str;\n    }\n    name = JSON.stringify('' + key);\n    if (name.match(/^\"([a-zA-Z_][a-zA-Z_0-9]*)\"$/)) {\n      name = name.substr(1, name.length - 2);\n      name = ctx.stylize(name, 'name');\n    } else {\n      name = name.replace(/'/g, \"\\\\'\")\n                 .replace(/\\\\\"/g, '\"')\n                 .replace(/(^\"|\"$)/g, \"'\");\n      name = ctx.stylize(name, 'string');\n    }\n  }\n\n  return name + ': ' + str;\n}\n\n\nfunction reduceToSingleString(output, base, braces) {\n  var numLinesEst = 0;\n  var length = output.reduce(function(prev, cur) {\n    numLinesEst++;\n    if (cur.indexOf('\\n') >= 0) numLinesEst++;\n    return prev + cur.replace(/\\u001b\\[\\d\\d?m/g, '').length + 1;\n  }, 0);\n\n  if (length > 60) {\n    return braces[0] +\n           (base === '' ? '' : base + '\\n ') +\n           ' ' +\n           output.join(',\\n  ') +\n           ' ' +\n           braces[1];\n  }\n\n  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];\n}\n\n\n// NOTE: These type checking functions intentionally don't use `instanceof`\n// because it is fragile and can be easily faked with `Object.create()`.\nfunction isArray(ar) {\n  return Array.isArray(ar);\n}\nexports.isArray = isArray;\n\nfunction isBoolean(arg) {\n  return typeof arg === 'boolean';\n}\nexports.isBoolean = isBoolean;\n\nfunction isNull(arg) {\n  return arg === null;\n}\nexports.isNull = isNull;\n\nfunction isNullOrUndefined(arg) {\n  return arg == null;\n}\nexports.isNullOrUndefined = isNullOrUndefined;\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\nexports.isNumber = isNumber;\n\nfunction isString(arg) {\n  return typeof arg === 'string';\n}\nexports.isString = isString;\n\nfunction isSymbol(arg) {\n  return typeof arg === 'symbol';\n}\nexports.isSymbol = isSymbol;\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\nexports.isUndefined = isUndefined;\n\nfunction isRegExp(re) {\n  return isObject(re) && objectToString(re) === '[object RegExp]';\n}\nexports.isRegExp = isRegExp;\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\nexports.isObject = isObject;\n\nfunction isDate(d) {\n  return isObject(d) && objectToString(d) === '[object Date]';\n}\nexports.isDate = isDate;\n\nfunction isError(e) {\n  return isObject(e) &&\n      (objectToString(e) === '[object Error]' || e instanceof Error);\n}\nexports.isError = isError;\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\nexports.isFunction = isFunction;\n\nfunction isPrimitive(arg) {\n  return arg === null ||\n         typeof arg === 'boolean' ||\n         typeof arg === 'number' ||\n         typeof arg === 'string' ||\n         typeof arg === 'symbol' ||  // ES6 symbol\n         typeof arg === 'undefined';\n}\nexports.isPrimitive = isPrimitive;\n\nexports.isBuffer = require('./support/isBuffer');\n\nfunction objectToString(o) {\n  return Object.prototype.toString.call(o);\n}\n\n\nfunction pad(n) {\n  return n < 10 ? '0' + n.toString(10) : n.toString(10);\n}\n\n\nvar months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',\n              'Oct', 'Nov', 'Dec'];\n\n// 26 Feb 16:19:34\nfunction timestamp() {\n  var d = new Date();\n  var time = [pad(d.getHours()),\n              pad(d.getMinutes()),\n              pad(d.getSeconds())].join(':');\n  return [d.getDate(), months[d.getMonth()], time].join(' ');\n}\n\n\n// log is just a thin wrapper to console.log that prepends a timestamp\nexports.log = function() {\n  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));\n};\n\n\n/**\n * Inherit the prototype methods from one constructor into another.\n *\n * The Function.prototype.inherits from lang.js rewritten as a standalone\n * function (not on Function.prototype). NOTE: If this file is to be loaded\n * during bootstrapping this function needs to be rewritten using some native\n * functions as prototype setup using normal JavaScript does not work as\n * expected during bootstrapping (see mirror.js in r114903).\n *\n * @param {function} ctor Constructor function which needs to inherit the\n *     prototype.\n * @param {function} superCtor Constructor function to inherit prototype from.\n */\nexports.inherits = require('inherits');\n\nexports._extend = function(origin, add) {\n  // Don't do anything if add isn't an object\n  if (!add || !isObject(add)) return origin;\n\n  var keys = Object.keys(add);\n  var i = keys.length;\n  while (i--) {\n    origin[keys[i]] = add[keys[i]];\n  }\n  return origin;\n};\n\nfunction hasOwnProperty(obj, prop) {\n  return Object.prototype.hasOwnProperty.call(obj, prop);\n}\n",
-    "module.exports = extend\n\nfunction extend() {\n    var target = {}\n\n    for (var i = 0; i < arguments.length; i++) {\n        var source = arguments[i]\n\n        for (var key in source) {\n            if (source.hasOwnProperty(key)) {\n                target[key] = source[key]\n            }\n        }\n    }\n\n    return target\n}\n"
+    "module.exports = extend\n\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\n\nfunction extend() {\n    var target = {}\n\n    for (var i = 0; i < arguments.length; i++) {\n        var source = arguments[i]\n\n        for (var key in source) {\n            if (hasOwnProperty.call(source, key)) {\n                target[key] = source[key]\n            }\n        }\n    }\n\n    return target\n}\n"
   ]
 }
\ No newline at end of file
diff --git a/dist/ref-parser.min.js b/dist/ref-parser.min.js
index 493b8fdc..be9a1c3a 100644
--- a/dist/ref-parser.min.js
+++ b/dist/ref-parser.min.js
@@ -1,23 +1,23 @@
 (function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.$RefParser = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
 /** !
- * JSON Schema $Ref Parser v1.4.0
+ * JSON Schema $Ref Parser v1.4.1
  *
  * @link https://github.com/BigstickCarpet/json-schema-ref-parser
  * @license MIT
  */
-"use strict";function bundle(e,r){util.debug("Bundling $ref pointers in %s",e._basePath),remap(e.$refs,r),dereference(e._basePath,e.$refs,r)}function remap(e,r){var t=[];Object.keys(e._$refs).forEach(function(a){var o=e._$refs[a];crawl(o.value,o.path+"#",e,t,r)});for(var a=0;a<t.length;a++){var o=t[a];o.old.$ref=o["new"].$ref}}function crawl(e,r,t,a,o){e&&"object"==typeof e&&Object.keys(e).forEach(function(u){var f=Pointer.join(r,u),n=e[u];if($Ref.is$Ref(n)){util.debug('Re-mapping $ref pointer "%s" at %s',n.$ref,f);var i=url.resolve(r,n.$ref),s=t._resolve(i,o),l=s.$ref.pathFromRoot+util.path.getHash(s.path).substr(1);util.debug("    new value: %s",l),a.push({old:n,"new":{$ref:l}})}else crawl(n,f,t,a,o)})}function dereference(e,r,t){e=util.path.stripHash(e),Object.keys(r._$refs).forEach(function(a){var o=r._$refs[a];"#"!==o.pathFromRoot&&r.set(e+o.pathFromRoot,o.value,t)})}var $Ref=require("./ref"),Pointer=require("./pointer"),util=require("./util"),url=require("url");module.exports=bundle;
+"use strict";function bundle(e,r){util.debug("Bundling $ref pointers in %s",e._basePath),remap(e.$refs,r),dereference(e._basePath,e.$refs,r)}function remap(e,r){var t=[];Object.keys(e._$refs).forEach(function(f){var a=e._$refs[f];crawl(a.value,a.path+"#",e,t,r)});for(var f=0;f<t.length;f++){var a=t[f];a.old$Ref.$ref=a.new$Ref.$ref}}function crawl(e,r,t,f,a){e&&"object"==typeof e&&Object.keys(e).forEach(function(o){var u=Pointer.join(r,o),n=e[o];if($Ref.is$Ref(n)){util.debug('Re-mapping $ref pointer "%s" at %s',n.$ref,u);var i=url.resolve(r,n.$ref),s=t._resolve(i,a),l=s.$ref.pathFromRoot+util.path.getHash(s.path).substr(1);util.debug("    new value: %s",l),f.push({old$Ref:n,new$Ref:{$ref:l}})}else crawl(n,u,t,f,a)})}function dereference(e,r,t){e=util.path.stripHash(e),Object.keys(r._$refs).forEach(function(f){var a=r._$refs[f];"#"!==a.pathFromRoot&&r.set(e+a.pathFromRoot,a.value,t)})}var $Ref=require("./ref"),Pointer=require("./pointer"),util=require("./util"),url=require("url");module.exports=bundle;
 
-},{"./pointer":6,"./ref":9,"./util":12,"url":90}],2:[function(require,module,exports){
+},{"./pointer":6,"./ref":9,"./util":12,"url":88}],2:[function(require,module,exports){
 "use strict";function dereference(e,r){util.debug("Dereferencing $ref pointers in %s",e._basePath),e.$refs.circular=!1,crawl(e.schema,e._basePath,[],e.$refs,r)}function crawl(e,r,n,c,f){var u=!1;return e&&"object"==typeof e&&(n.push(e),Object.keys(e).forEach(function(i){var t=Pointer.join(r,i),o=e[i],a=!1;if($Ref.isAllowed$Ref(o,f)){util.debug('Dereferencing $ref pointer "%s" at %s',o.$ref,t);var l=url.resolve(r,o.$ref),s=c._resolve(l,f);a=s.circular||-1!==n.indexOf(s.value),a&&foundCircularReference(t,c,f);var d=getDereferencedValue(o,s.value);a||(a=crawl(d,s.path,n,c,f)),a&&f.$refs.circular!==!0||(e[i]=d)}else a=-1===n.indexOf(o)?crawl(o,t,n,c,f):foundCircularReference(t,c,f);u=u||a}),n.pop()),u}function getDereferencedValue(e,r){if(r&&"object"==typeof r&&Object.keys(e).length>1){var n={};return Object.keys(e).forEach(function(r){"$ref"!==r&&(n[r]=e[r])}),Object.keys(r).forEach(function(e){e in n||(n[e]=r[e])}),n}return r}function foundCircularReference(e,r,n){if(r.circular=!0,!n.$refs.circular)throw ono.reference("Circular $ref pointer found at %s",e);return!0}var $Ref=require("./ref"),Pointer=require("./pointer"),util=require("./util"),ono=require("ono"),url=require("url");module.exports=dereference;
 
-},{"./pointer":6,"./ref":9,"./util":12,"ono":65,"url":90}],3:[function(require,module,exports){
+},{"./pointer":6,"./ref":9,"./util":12,"ono":65,"url":88}],3:[function(require,module,exports){
 (function (Buffer){
 "use strict";function $RefParser(){this.schema=null,this.$refs=new $Refs,this._basePath=""}function normalizeArgs(e){var r=e[1],t=e[2];return"function"==typeof r&&(t=r,r=void 0),r instanceof Options||(r=new Options(r)),{schema:e[0],options:r,callback:t}}var Promise=require("./promise"),Options=require("./options"),$Refs=require("./refs"),$Ref=require("./ref"),read=require("./read"),resolve=require("./resolve"),bundle=require("./bundle"),dereference=require("./dereference"),util=require("./util"),url=require("url"),maybe=require("call-me-maybe"),ono=require("ono");module.exports=$RefParser,module.exports.YAML=require("./yaml"),$RefParser.parse=function(e,r,t){var s=this;return(new s).parse(e,r,t)},$RefParser.prototype.parse=function(e,r,t){var s=normalizeArgs(arguments);if(s.schema&&"object"==typeof s.schema){this.schema=s.schema,this._basePath="";var a=new $Ref(this.$refs,this._basePath);return a.setValue(this.schema,s.options),maybe(s.callback,Promise.resolve(this.schema))}if(!s.schema||"string"!=typeof s.schema){var n=ono("Expected a file path, URL, or object. Got %s",s.schema);return maybe(s.callback,Promise.reject(n))}var o=this;return s.schema=util.path.localPathToUrl(s.schema),s.schema=url.resolve(util.path.cwd(),s.schema),this._basePath=util.path.stripHash(s.schema),read(s.schema,this.$refs,s.options).then(function(e){var r=e.$ref.value;if(!r||"object"!=typeof r||r instanceof Buffer)throw ono.syntax('"%s" is not a valid JSON Schema',o._basePath);return o.schema=r,maybe(s.callback,Promise.resolve(o.schema))})["catch"](function(e){return maybe(s.callback,Promise.reject(e))})},$RefParser.resolve=function(e,r,t){var s=this;return(new s).resolve(e,r,t)},$RefParser.prototype.resolve=function(e,r,t){var s=this,a=normalizeArgs(arguments);return this.parse(a.schema,a.options).then(function(){return resolve(s,a.options)}).then(function(){return maybe(a.callback,Promise.resolve(s.$refs))})["catch"](function(e){return maybe(a.callback,Promise.reject(e))})},$RefParser.bundle=function(e,r,t){var s=this;return(new s).bundle(e,r,t)},$RefParser.prototype.bundle=function(e,r,t){var s=this,a=normalizeArgs(arguments);return this.resolve(a.schema,a.options).then(function(){return bundle(s,a.options),maybe(a.callback,Promise.resolve(s.schema))})["catch"](function(e){return maybe(a.callback,Promise.reject(e))})},$RefParser.dereference=function(e,r,t){var s=this;return(new s).dereference(e,r,t)},$RefParser.prototype.dereference=function(e,r,t){var s=this,a=normalizeArgs(arguments);return this.resolve(a.schema,a.options).then(function(){return dereference(s,a.options),maybe(a.callback,Promise.resolve(s.schema))})["catch"](function(e){return maybe(a.callback,Promise.reject(e))})};
 
 }).call(this,require("buffer").Buffer)
 
-},{"./bundle":1,"./dereference":2,"./options":4,"./promise":7,"./read":8,"./ref":9,"./refs":10,"./resolve":11,"./util":12,"./yaml":13,"buffer":17,"call-me-maybe":19,"ono":65,"url":90}],4:[function(require,module,exports){
-"use strict";function $RefParserOptions(e){this.allow={json:!0,yaml:!0,empty:!0,unknown:!0},this.$refs={internal:!0,external:!0,circular:!0},this.cache={fs:60,http:300,https:300},this.http={withCredentials:!0},merge(e,this)}function merge(e,t){if(e)for(var r=Object.keys(e),s=0;s<r.length;s++){var i=r[s],n=e[i];if(void 0===t[i])t[i]=n;else for(var a=Object.keys(n),o=0;o<a.length;o++){var h=a[o],l=n[h];void 0!==l&&(t[i][h]=l)}}}module.exports=$RefParserOptions;
+},{"./bundle":1,"./dereference":2,"./options":4,"./promise":7,"./read":8,"./ref":9,"./refs":10,"./resolve":11,"./util":12,"./yaml":13,"buffer":17,"call-me-maybe":20,"ono":65,"url":88}],4:[function(require,module,exports){
+"use strict";function $RefParserOptions(e){this.allow={json:!0,yaml:!0,empty:!0,unknown:!0},this.$refs={internal:!0,external:!0,circular:!0},this.cache={fs:60,http:300,https:300},this.http={withCredentials:!1},merge(e,this)}function merge(e,t){if(e)for(var r=Object.keys(e),s=0;s<r.length;s++){var i=r[s],n=e[i];if(void 0===t[i])t[i]=n;else for(var a=Object.keys(n),o=0;o<a.length;o++){var h=a[o],l=n[h];void 0!==l&&(t[i][h]=l)}}}module.exports=$RefParserOptions;
 
 },{}],5:[function(require,module,exports){
 (function (Buffer){
@@ -28,16 +28,16 @@
 },{"./util":12,"./yaml":13,"buffer":17,"ono":65}],6:[function(require,module,exports){
 "use strict";function Pointer(e,t){this.$ref=e,this.path=t,this.value=void 0,this.circular=!1}function resolveIf$Ref(e,t){if($Ref.isAllowed$Ref(e.value,t)){var r=url.resolve(e.path,e.value.$ref);if(r===e.path)e.circular=!0;else if(1===Object.keys(e.value).length){var i=e.$ref.$refs._resolve(r);return e.$ref=i.$ref,e.path=i.path,e.value=i.value,!0}}}function setValue(e,t,r){if(!e.value||"object"!=typeof e.value)throw ono.syntax('Error assigning $ref pointer "%s". \nCannot set "%s" of a non-object.',e.path,t);return"-"===t&&Array.isArray(e.value)?e.value.push(r):e.value[t]=r,r}module.exports=Pointer;var $Ref=require("./ref"),util=require("./util"),url=require("url"),ono=require("ono"),slashes=/\//g,tildes=/~/g,escapedSlash=/~1/g,escapedTilde=/~0/g;Pointer.prototype.resolve=function(e,t){var r=Pointer.parse(this.path);this.value=e;for(var i=0;i<r.length;i++){resolveIf$Ref(this,t)&&(this.path=Pointer.join(this.path,r.slice(i)));var s=r[i];if(void 0===this.value[s])throw ono.syntax('Error resolving $ref pointer "%s". \nToken "%s" does not exist.',this.path,s);this.value=this.value[s]}return resolveIf$Ref(this,t),this},Pointer.prototype.set=function(e,t,r){var i,s=Pointer.parse(this.path);if(0===s.length)return this.value=t,t;this.value=e;for(var a=0;a<s.length-1;a++)resolveIf$Ref(this,r),i=s[a],this.value&&void 0!==this.value[i]?this.value=this.value[i]:this.value=setValue(this,i,{});return resolveIf$Ref(this,r),i=s[s.length-1],setValue(this,i,t),e},Pointer.parse=function(e){var t=util.path.getHash(e).substr(1);if(!t)return[];t=t.split("/");for(var r=0;r<t.length;r++)t[r]=decodeURI(t[r].replace(escapedSlash,"/").replace(escapedTilde,"~"));if(""!==t[0])throw ono.syntax('Invalid $ref pointer "%s". Pointers must begin with "#/"',t);return t.slice(1)},Pointer.join=function(e,t){-1===e.indexOf("#")&&(e+="#"),t=Array.isArray(t)?t:[t];for(var r=0;r<t.length;r++){var i=t[r];e+="/"+encodeURI(i.replace(tildes,"~0").replace(slashes,"~1"))}return e};
 
-},{"./ref":9,"./util":12,"ono":65,"url":90}],7:[function(require,module,exports){
+},{"./ref":9,"./util":12,"ono":65,"url":88}],7:[function(require,module,exports){
 "use strict";module.exports="function"==typeof Promise?Promise:require("es6-promise").Promise;
 
-},{"es6-promise":23}],8:[function(require,module,exports){
+},{"es6-promise":24}],8:[function(require,module,exports){
 (function (process,Buffer){
 "use strict";function read(e,r,t){try{e=util.path.stripHash(e),util.debug("Reading %s",e);var o=r._get$Ref(e);return o&&!o.isExpired()?(util.debug("    cached from %s",o.pathType),Promise.resolve({$ref:o,cached:!0})):(o=new $Ref(r,e),read$Ref(o,t))}catch(n){return Promise.reject(n)}}function read$Ref(e,r){try{var t=r.$refs.external&&(read$RefFile(e,r)||read$RefUrl(e,r));return t?t.then(function(t){var o=parse(t,e.path,r);return e.setValue(o,r),{$ref:e,cached:!1}}):Promise.reject(ono.syntax('Unable to resolve $ref pointer "%s"',e.path))}catch(o){return Promise.reject(o)}}function read$RefFile(e,r){return process.browser||util.path.isUrl(e.path)?void 0:(e.pathType="fs",new Promise(function(r,t){var o;try{o=util.path.urlToLocalPath(e.path)}catch(n){t(ono.uri(n,"Malformed URI: %s",e.path))}util.debug("Opening file: %s",o);try{fs.readFile(o,function(o,n){o?t(ono(o,'Error opening file "%s"',e.path)):r(n)})}catch(n){t(ono(n,'Error opening file "%s"',o))}}))}function read$RefUrl(e,r){var t=url.parse(e.path);return process.browser&&!t.protocol&&(t.protocol=url.parse(location.href).protocol),"http:"===t.protocol?(e.pathType="http",download(http,t,r)):"https:"===t.protocol?(e.pathType="https",download(https,t,r)):void 0}function download(e,r,t){return new Promise(function(o,n){function a(e){var a;e.on("data",function(e){a=a?Buffer.concat([new Buffer(a),new Buffer(e)]):e}),e.on("end",function(){e.statusCode>=400?n(ono("GET %s \nHTTP ERROR %d \n%s",r.href,e.statusCode,a)):204!==e.statusCode&&a&&a.length||t.allow.empty?o(a||""):n(ono("GET %s \nHTTP 204: No Content",r.href))}),e.on("error",function(e){n(ono(e,'Error downloading file "%s"',r.href))})}try{util.debug("Downloading file: %s",r);var i=e.get({hostname:r.hostname,port:r.port,path:r.path,auth:r.auth,withCredentials:t.http.withCredentials},a);"function"==typeof i.setTimeout&&i.setTimeout(5e3),i.on("timeout",function(){i.abort()}),i.on("error",function(e){n(ono(e,'Error downloading file "%s"',r.href))})}catch(s){n(ono(s,'Error downloading file "%s"',r.href))}})}var fs=require("fs"),http=require("http"),https=require("https"),parse=require("./parse"),util=require("./util"),$Ref=require("./ref"),Promise=require("./promise"),url=require("url"),ono=require("ono");module.exports=read;
 
 }).call(this,require('_process'),require("buffer").Buffer)
 
-},{"./parse":5,"./promise":7,"./ref":9,"./util":12,"_process":67,"buffer":17,"fs":16,"http":83,"https":27,"ono":65,"url":90}],9:[function(require,module,exports){
+},{"./parse":5,"./promise":7,"./ref":9,"./util":12,"_process":67,"buffer":17,"fs":16,"http":83,"https":27,"ono":65,"url":88}],9:[function(require,module,exports){
 "use strict";function $Ref(e,t){t=util.path.stripHash(t),e._$refs[t]=this,this.$refs=e,this.path=t,this.pathType=void 0,this.pathFromRoot="#",this.value=void 0,this.expires=void 0}module.exports=$Ref;var Pointer=require("./pointer"),util=require("./util");$Ref.prototype.isExpired=function(){return!!(this.expires&&this.expires<=new Date)},$Ref.prototype.expire=function(){this.expires=new Date},$Ref.prototype.setValue=function(e,t){this.value=e;var i=t.cache[this.pathType];if(i>0){var r=Date.now()+1e3*i;this.expires=new Date(r)}},$Ref.prototype.exists=function(e){try{return this.resolve(e),!0}catch(t){return!1}},$Ref.prototype.get=function(e,t){return this.resolve(e,t).value},$Ref.prototype.resolve=function(e,t){var i=new Pointer(this,e);return i.resolve(this.value,t)},$Ref.prototype.set=function(e,t,i){var r=new Pointer(this,e);this.value=r.set(this.value,t,i)},$Ref.is$Ref=function(e){return e&&"object"==typeof e&&"string"==typeof e.$ref&&e.$ref.length>0},$Ref.isExternal$Ref=function(e){return $Ref.is$Ref(e)&&"#"!==e.$ref[0]},$Ref.isAllowed$Ref=function(e,t){if($Ref.is$Ref(e))if("#"===e.$ref[0]){if(t.$refs.internal)return!0}else if(t.$refs.external)return!0};
 
 },{"./pointer":6,"./util":12}],10:[function(require,module,exports){
@@ -46,16 +46,16 @@
 },{"./options":4,"./util":12,"ono":65}],11:[function(require,module,exports){
 "use strict";function resolve(e,r){try{if(!r.$refs.external)return Promise.resolve();util.debug("Resolving $ref pointers in %s",e._basePath);var i=crawl(e.schema,e._basePath+"#","#",e.$refs,r);return Promise.all(i)}catch(t){return Promise.reject(t)}}function crawl(e,r,i,t,o){var n=[];if(e&&"object"==typeof e){var a=Object.keys(e),s=a.indexOf("definitions");s>0&&a.splice(0,0,a.splice(s,1)[0]),a.forEach(function(a){var s=Pointer.join(r,a),u=Pointer.join(i,a),l=e[a];if($Ref.isExternal$Ref(l)){util.debug('Resolving $ref pointer "%s" at %s',l.$ref,s);var c=url.resolve(r,l.$ref),f=crawl$Ref(c,u,t,o)["catch"](function(e){throw ono.syntax(e,"Error at %s",s)});n.push(f)}else n=n.concat(crawl(l,s,u,t,o))})}return n}function crawl$Ref(e,r,i,t){return read(e,i,t).then(function(e){if(!e.cached){var o=e.$ref;o.pathFromRoot=r,util.debug("Resolving $ref pointers in %s",o.path);var n=crawl(o.value,o.path+"#",r,i,t);return Promise.all(n)}})}var Promise=require("./promise"),$Ref=require("./ref"),Pointer=require("./pointer"),read=require("./read"),util=require("./util"),url=require("url"),ono=require("ono");module.exports=resolve;
 
-},{"./pointer":6,"./promise":7,"./read":8,"./ref":9,"./util":12,"ono":65,"url":90}],12:[function(require,module,exports){
+},{"./pointer":6,"./promise":7,"./read":8,"./ref":9,"./util":12,"ono":65,"url":88}],12:[function(require,module,exports){
 (function (process){
 "use strict";var debug=require("debug"),isWindows=/^win/.test(process.platform),forwardSlashPattern=/\//g,protocolPattern=/^[a-z0-9.+-]+:\/\//i,urlEncodePatterns=[/\?/g,"%3F",/\#/g,"%23",isWindows?/\\/g:/\//,"/"],urlDecodePatterns=[/\%23/g,"#",/\%24/g,"$",/\%26/g,"&",/\%2C/g,",",/\%40/g,"@"];exports.debug=debug("json-schema-ref-parser"),exports.path={},exports.path.cwd=function(){return process.browser?location.href:process.cwd()+"/"},exports.path.isUrl=function(r){return protocolPattern.test(r)},exports.path.localPathToUrl=function(r){if(!process.browser&&!exports.path.isUrl(r)){for(var e=0;e<urlEncodePatterns.length;e+=2)r=r.replace(urlEncodePatterns[e],urlEncodePatterns[e+1]);r=encodeURI(r)}return r},exports.path.urlToLocalPath=function(r){r=decodeURI(r);for(var e=0;e<urlDecodePatterns.length;e+=2)r=r.replace(urlDecodePatterns[e],urlDecodePatterns[e+1]);return isWindows&&(r=r.replace(forwardSlashPattern,"\\")),r},exports.path.getHash=function(r){var e=r.indexOf("#");return e>=0?r.substr(e):""},exports.path.stripHash=function(r){var e=r.indexOf("#");return e>=0&&(r=r.substr(0,e)),r},exports.path.extname=function(r){var e=r.lastIndexOf(".");return e>=0?r.substr(e).toLowerCase():""};
 
 }).call(this,require('_process'))
 
-},{"_process":67,"debug":21}],13:[function(require,module,exports){
-"use strict";var yaml=require("js-yaml");module.exports={parse:function(e,r){return yaml.safeLoad(e)},stringify:function(e,r,t){var n=("string"==typeof t?t.length:t)||2;return yaml.safeDump(e,{indent:n})}};
+},{"_process":67,"debug":22}],13:[function(require,module,exports){
+"use strict";var yaml=require("js-yaml"),ono=require("ono");module.exports={parse:function(r,e){try{return yaml.safeLoad(r)}catch(o){throw o instanceof Error?o:ono(o,o.message)}},stringify:function(r,e,o){try{var t=("string"==typeof o?o.length:o)||2;return yaml.safeDump(r,{indent:t})}catch(n){throw n instanceof Error?n:ono(n,n.message)}}};
 
-},{"js-yaml":34}],14:[function(require,module,exports){
+},{"js-yaml":34,"ono":65}],14:[function(require,module,exports){
 var lookup="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";!function(t){"use strict";function r(t){var r=t.charCodeAt(0);return r===h||r===u?62:r===c||r===f?63:o>r?-1:o+10>r?r-o+26+26:i+26>r?r-i:A+26>r?r-A+26:void 0}function e(t){function e(t){i[f++]=t}var n,h,c,o,A,i;if(t.length%4>0)throw new Error("Invalid string. Length must be a multiple of 4");var u=t.length;A="="===t.charAt(u-2)?2:"="===t.charAt(u-1)?1:0,i=new a(3*t.length/4-A),c=A>0?t.length-4:t.length;var f=0;for(n=0,h=0;c>n;n+=4,h+=3)o=r(t.charAt(n))<<18|r(t.charAt(n+1))<<12|r(t.charAt(n+2))<<6|r(t.charAt(n+3)),e((16711680&o)>>16),e((65280&o)>>8),e(255&o);return 2===A?(o=r(t.charAt(n))<<2|r(t.charAt(n+1))>>4,e(255&o)):1===A&&(o=r(t.charAt(n))<<10|r(t.charAt(n+1))<<4|r(t.charAt(n+2))>>2,e(o>>8&255),e(255&o)),i}function n(t){function r(t){return lookup.charAt(t)}function e(t){return r(t>>18&63)+r(t>>12&63)+r(t>>6&63)+r(63&t)}var n,a,h,c=t.length%3,o="";for(n=0,h=t.length-c;h>n;n+=3)a=(t[n]<<16)+(t[n+1]<<8)+t[n+2],o+=e(a);switch(c){case 1:a=t[t.length-1],o+=r(a>>2),o+=r(a<<4&63),o+="==";break;case 2:a=(t[t.length-2]<<8)+t[t.length-1],o+=r(a>>10),o+=r(a>>4&63),o+=r(a<<2&63),o+="="}return o}var a="undefined"!=typeof Uint8Array?Uint8Array:Array,h="+".charCodeAt(0),c="/".charCodeAt(0),o="0".charCodeAt(0),A="a".charCodeAt(0),i="A".charCodeAt(0),u="-".charCodeAt(0),f="_".charCodeAt(0);t.toByteArray=e,t.fromByteArray=n}("undefined"==typeof exports?this.base64js={}:exports);
 
 },{}],15:[function(require,module,exports){
@@ -70,32 +70,35 @@ var lookup="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";!f
  * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
  * @license  MIT
  */
-function typedArraySupport(){function t(){}try{var e=new Uint8Array(1);return e.foo=function(){return 42},e.constructor=t,42===e.foo()&&e.constructor===t&&"function"==typeof e.subarray&&0===e.subarray(1,1).byteLength}catch(r){return!1}}function kMaxLength(){return Buffer.TYPED_ARRAY_SUPPORT?2147483647:1073741823}function Buffer(t){return this instanceof Buffer?(this.length=0,this.parent=void 0,"number"==typeof t?fromNumber(this,t):"string"==typeof t?fromString(this,t,arguments.length>1?arguments[1]:"utf8"):fromObject(this,t)):arguments.length>1?new Buffer(t,arguments[1]):new Buffer(t)}function fromNumber(t,e){if(t=allocate(t,0>e?0:0|checked(e)),!Buffer.TYPED_ARRAY_SUPPORT)for(var r=0;e>r;r++)t[r]=0;return t}function fromString(t,e,r){("string"!=typeof r||""===r)&&(r="utf8");var n=0|byteLength(e,r);return t=allocate(t,n),t.write(e,r),t}function fromObject(t,e){if(Buffer.isBuffer(e))return fromBuffer(t,e);if(isArray(e))return fromArray(t,e);if(null==e)throw new TypeError("must start with number, buffer, array or string");if("undefined"!=typeof ArrayBuffer){if(e.buffer instanceof ArrayBuffer)return fromTypedArray(t,e);if(e instanceof ArrayBuffer)return fromArrayBuffer(t,e)}return e.length?fromArrayLike(t,e):fromJsonObject(t,e)}function fromBuffer(t,e){var r=0|checked(e.length);return t=allocate(t,r),e.copy(t,0,0,r),t}function fromArray(t,e){var r=0|checked(e.length);t=allocate(t,r);for(var n=0;r>n;n+=1)t[n]=255&e[n];return t}function fromTypedArray(t,e){var r=0|checked(e.length);t=allocate(t,r);for(var n=0;r>n;n+=1)t[n]=255&e[n];return t}function fromArrayBuffer(t,e){return Buffer.TYPED_ARRAY_SUPPORT?(e.byteLength,t=Buffer._augment(new Uint8Array(e))):t=fromTypedArray(t,new Uint8Array(e)),t}function fromArrayLike(t,e){var r=0|checked(e.length);t=allocate(t,r);for(var n=0;r>n;n+=1)t[n]=255&e[n];return t}function fromJsonObject(t,e){var r,n=0;"Buffer"===e.type&&isArray(e.data)&&(r=e.data,n=0|checked(r.length)),t=allocate(t,n);for(var i=0;n>i;i+=1)t[i]=255&r[i];return t}function allocate(t,e){Buffer.TYPED_ARRAY_SUPPORT?(t=Buffer._augment(new Uint8Array(e)),t.__proto__=Buffer.prototype):(t.length=e,t._isBuffer=!0);var r=0!==e&&e<=Buffer.poolSize>>>1;return r&&(t.parent=rootParent),t}function checked(t){if(t>=kMaxLength())throw new RangeError("Attempt to allocate Buffer larger than maximum size: 0x"+kMaxLength().toString(16)+" bytes");return 0|t}function SlowBuffer(t,e){if(!(this instanceof SlowBuffer))return new SlowBuffer(t,e);var r=new Buffer(t,e);return delete r.parent,r}function byteLength(t,e){"string"!=typeof t&&(t=""+t);var r=t.length;if(0===r)return 0;for(var n=!1;;)switch(e){case"ascii":case"binary":case"raw":case"raws":return r;case"utf8":case"utf-8":return utf8ToBytes(t).length;case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return 2*r;case"hex":return r>>>1;case"base64":return base64ToBytes(t).length;default:if(n)return utf8ToBytes(t).length;e=(""+e).toLowerCase(),n=!0}}function slowToString(t,e,r){var n=!1;if(e=0|e,r=void 0===r||r===1/0?this.length:0|r,t||(t="utf8"),0>e&&(e=0),r>this.length&&(r=this.length),e>=r)return"";for(;;)switch(t){case"hex":return hexSlice(this,e,r);case"utf8":case"utf-8":return utf8Slice(this,e,r);case"ascii":return asciiSlice(this,e,r);case"binary":return binarySlice(this,e,r);case"base64":return base64Slice(this,e,r);case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return utf16leSlice(this,e,r);default:if(n)throw new TypeError("Unknown encoding: "+t);t=(t+"").toLowerCase(),n=!0}}function hexWrite(t,e,r,n){r=Number(r)||0;var i=t.length-r;n?(n=Number(n),n>i&&(n=i)):n=i;var f=e.length;if(f%2!==0)throw new Error("Invalid hex string");n>f/2&&(n=f/2);for(var o=0;n>o;o++){var u=parseInt(e.substr(2*o,2),16);if(isNaN(u))throw new Error("Invalid hex string");t[r+o]=u}return o}function utf8Write(t,e,r,n){return blitBuffer(utf8ToBytes(e,t.length-r),t,r,n)}function asciiWrite(t,e,r,n){return blitBuffer(asciiToBytes(e),t,r,n)}function binaryWrite(t,e,r,n){return asciiWrite(t,e,r,n)}function base64Write(t,e,r,n){return blitBuffer(base64ToBytes(e),t,r,n)}function ucs2Write(t,e,r,n){return blitBuffer(utf16leToBytes(e,t.length-r),t,r,n)}function base64Slice(t,e,r){return 0===e&&r===t.length?base64.fromByteArray(t):base64.fromByteArray(t.slice(e,r))}function utf8Slice(t,e,r){r=Math.min(t.length,r);for(var n=[],i=e;r>i;){var f=t[i],o=null,u=f>239?4:f>223?3:f>191?2:1;if(r>=i+u){var s,a,h,c;switch(u){case 1:128>f&&(o=f);break;case 2:s=t[i+1],128===(192&s)&&(c=(31&f)<<6|63&s,c>127&&(o=c));break;case 3:s=t[i+1],a=t[i+2],128===(192&s)&&128===(192&a)&&(c=(15&f)<<12|(63&s)<<6|63&a,c>2047&&(55296>c||c>57343)&&(o=c));break;case 4:s=t[i+1],a=t[i+2],h=t[i+3],128===(192&s)&&128===(192&a)&&128===(192&h)&&(c=(15&f)<<18|(63&s)<<12|(63&a)<<6|63&h,c>65535&&1114112>c&&(o=c))}}null===o?(o=65533,u=1):o>65535&&(o-=65536,n.push(o>>>10&1023|55296),o=56320|1023&o),n.push(o),i+=u}return decodeCodePointsArray(n)}function decodeCodePointsArray(t){var e=t.length;if(MAX_ARGUMENTS_LENGTH>=e)return String.fromCharCode.apply(String,t);for(var r="",n=0;e>n;)r+=String.fromCharCode.apply(String,t.slice(n,n+=MAX_ARGUMENTS_LENGTH));return r}function asciiSlice(t,e,r){var n="";r=Math.min(t.length,r);for(var i=e;r>i;i++)n+=String.fromCharCode(127&t[i]);return n}function binarySlice(t,e,r){var n="";r=Math.min(t.length,r);for(var i=e;r>i;i++)n+=String.fromCharCode(t[i]);return n}function hexSlice(t,e,r){var n=t.length;(!e||0>e)&&(e=0),(!r||0>r||r>n)&&(r=n);for(var i="",f=e;r>f;f++)i+=toHex(t[f]);return i}function utf16leSlice(t,e,r){for(var n=t.slice(e,r),i="",f=0;f<n.length;f+=2)i+=String.fromCharCode(n[f]+256*n[f+1]);return i}function checkOffset(t,e,r){if(t%1!==0||0>t)throw new RangeError("offset is not uint");if(t+e>r)throw new RangeError("Trying to access beyond buffer length")}function checkInt(t,e,r,n,i,f){if(!Buffer.isBuffer(t))throw new TypeError("buffer must be a Buffer instance");if(e>i||f>e)throw new RangeError("value is out of bounds");if(r+n>t.length)throw new RangeError("index out of range")}function objectWriteUInt16(t,e,r,n){0>e&&(e=65535+e+1);for(var i=0,f=Math.min(t.length-r,2);f>i;i++)t[r+i]=(e&255<<8*(n?i:1-i))>>>8*(n?i:1-i)}function objectWriteUInt32(t,e,r,n){0>e&&(e=4294967295+e+1);for(var i=0,f=Math.min(t.length-r,4);f>i;i++)t[r+i]=e>>>8*(n?i:3-i)&255}function checkIEEE754(t,e,r,n,i,f){if(e>i||f>e)throw new RangeError("value is out of bounds");if(r+n>t.length)throw new RangeError("index out of range");if(0>r)throw new RangeError("index out of range")}function writeFloat(t,e,r,n,i){return i||checkIEEE754(t,e,r,4,3.4028234663852886e38,-3.4028234663852886e38),ieee754.write(t,e,r,n,23,4),r+4}function writeDouble(t,e,r,n,i){return i||checkIEEE754(t,e,r,8,1.7976931348623157e308,-1.7976931348623157e308),ieee754.write(t,e,r,n,52,8),r+8}function base64clean(t){if(t=stringtrim(t).replace(INVALID_BASE64_RE,""),t.length<2)return"";for(;t.length%4!==0;)t+="=";return t}function stringtrim(t){return t.trim?t.trim():t.replace(/^\s+|\s+$/g,"")}function toHex(t){return 16>t?"0"+t.toString(16):t.toString(16)}function utf8ToBytes(t,e){e=e||1/0;for(var r,n=t.length,i=null,f=[],o=0;n>o;o++){if(r=t.charCodeAt(o),r>55295&&57344>r){if(!i){if(r>56319){(e-=3)>-1&&f.push(239,191,189);continue}if(o+1===n){(e-=3)>-1&&f.push(239,191,189);continue}i=r;continue}if(56320>r){(e-=3)>-1&&f.push(239,191,189),i=r;continue}r=i-55296<<10|r-56320|65536}else i&&(e-=3)>-1&&f.push(239,191,189);if(i=null,128>r){if((e-=1)<0)break;f.push(r)}else if(2048>r){if((e-=2)<0)break;f.push(r>>6|192,63&r|128)}else if(65536>r){if((e-=3)<0)break;f.push(r>>12|224,r>>6&63|128,63&r|128)}else{if(!(1114112>r))throw new Error("Invalid code point");if((e-=4)<0)break;f.push(r>>18|240,r>>12&63|128,r>>6&63|128,63&r|128)}}return f}function asciiToBytes(t){for(var e=[],r=0;r<t.length;r++)e.push(255&t.charCodeAt(r));return e}function utf16leToBytes(t,e){for(var r,n,i,f=[],o=0;o<t.length&&!((e-=2)<0);o++)r=t.charCodeAt(o),n=r>>8,i=r%256,f.push(i),f.push(n);return f}function base64ToBytes(t){return base64.toByteArray(base64clean(t))}function blitBuffer(t,e,r,n){for(var i=0;n>i&&!(i+r>=e.length||i>=t.length);i++)e[i+r]=t[i];return i}var base64=require("base64-js"),ieee754=require("ieee754"),isArray=require("is-array");exports.Buffer=Buffer,exports.SlowBuffer=SlowBuffer,exports.INSPECT_MAX_BYTES=50,Buffer.poolSize=8192;var rootParent={};Buffer.TYPED_ARRAY_SUPPORT=void 0!==global.TYPED_ARRAY_SUPPORT?global.TYPED_ARRAY_SUPPORT:typedArraySupport(),Buffer.TYPED_ARRAY_SUPPORT&&(Buffer.prototype.__proto__=Uint8Array.prototype,Buffer.__proto__=Uint8Array),Buffer.isBuffer=function(t){return!(null==t||!t._isBuffer)},Buffer.compare=function(t,e){if(!Buffer.isBuffer(t)||!Buffer.isBuffer(e))throw new TypeError("Arguments must be Buffers");if(t===e)return 0;for(var r=t.length,n=e.length,i=0,f=Math.min(r,n);f>i&&t[i]===e[i];)++i;return i!==f&&(r=t[i],n=e[i]),n>r?-1:r>n?1:0},Buffer.isEncoding=function(t){switch(String(t).toLowerCase()){case"hex":case"utf8":case"utf-8":case"ascii":case"binary":case"base64":case"raw":case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return!0;default:return!1}},Buffer.concat=function(t,e){if(!isArray(t))throw new TypeError("list argument must be an Array of Buffers.");if(0===t.length)return new Buffer(0);var r;if(void 0===e)for(e=0,r=0;r<t.length;r++)e+=t[r].length;var n=new Buffer(e),i=0;for(r=0;r<t.length;r++){var f=t[r];f.copy(n,i),i+=f.length}return n},Buffer.byteLength=byteLength,Buffer.prototype.length=void 0,Buffer.prototype.parent=void 0,Buffer.prototype.toString=function(){var t=0|this.length;return 0===t?"":0===arguments.length?utf8Slice(this,0,t):slowToString.apply(this,arguments)},Buffer.prototype.equals=function(t){if(!Buffer.isBuffer(t))throw new TypeError("Argument must be a Buffer");return this===t?!0:0===Buffer.compare(this,t)},Buffer.prototype.inspect=function(){var t="",e=exports.INSPECT_MAX_BYTES;return this.length>0&&(t=this.toString("hex",0,e).match(/.{2}/g).join(" "),this.length>e&&(t+=" ... ")),"<Buffer "+t+">"},Buffer.prototype.compare=function(t){if(!Buffer.isBuffer(t))throw new TypeError("Argument must be a Buffer");return this===t?0:Buffer.compare(this,t)},Buffer.prototype.indexOf=function(t,e){function r(t,e,r){for(var n=-1,i=0;r+i<t.length;i++)if(t[r+i]===e[-1===n?0:i-n]){if(-1===n&&(n=i),i-n+1===e.length)return r+n}else n=-1;return-1}if(e>2147483647?e=2147483647:-2147483648>e&&(e=-2147483648),e>>=0,0===this.length)return-1;if(e>=this.length)return-1;if(0>e&&(e=Math.max(this.length+e,0)),"string"==typeof t)return 0===t.length?-1:String.prototype.indexOf.call(this,t,e);if(Buffer.isBuffer(t))return r(this,t,e);if("number"==typeof t)return Buffer.TYPED_ARRAY_SUPPORT&&"function"===Uint8Array.prototype.indexOf?Uint8Array.prototype.indexOf.call(this,t,e):r(this,[t],e);throw new TypeError("val must be string, number or Buffer")},Buffer.prototype.get=function(t){return console.log(".get() is deprecated. Access using array indexes instead."),this.readUInt8(t)},Buffer.prototype.set=function(t,e){return console.log(".set() is deprecated. Access using array indexes instead."),this.writeUInt8(t,e)},Buffer.prototype.write=function(t,e,r,n){if(void 0===e)n="utf8",r=this.length,e=0;else if(void 0===r&&"string"==typeof e)n=e,r=this.length,e=0;else if(isFinite(e))e=0|e,isFinite(r)?(r=0|r,void 0===n&&(n="utf8")):(n=r,r=void 0);else{var i=n;n=e,e=0|r,r=i}var f=this.length-e;if((void 0===r||r>f)&&(r=f),t.length>0&&(0>r||0>e)||e>this.length)throw new RangeError("attempt to write outside buffer bounds");n||(n="utf8");for(var o=!1;;)switch(n){case"hex":return hexWrite(this,t,e,r);case"utf8":case"utf-8":return utf8Write(this,t,e,r);case"ascii":return asciiWrite(this,t,e,r);case"binary":return binaryWrite(this,t,e,r);case"base64":return base64Write(this,t,e,r);case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return ucs2Write(this,t,e,r);default:if(o)throw new TypeError("Unknown encoding: "+n);n=(""+n).toLowerCase(),o=!0}},Buffer.prototype.toJSON=function(){return{type:"Buffer",data:Array.prototype.slice.call(this._arr||this,0)}};var MAX_ARGUMENTS_LENGTH=4096;Buffer.prototype.slice=function(t,e){var r=this.length;t=~~t,e=void 0===e?r:~~e,0>t?(t+=r,0>t&&(t=0)):t>r&&(t=r),0>e?(e+=r,0>e&&(e=0)):e>r&&(e=r),t>e&&(e=t);var n;if(Buffer.TYPED_ARRAY_SUPPORT)n=Buffer._augment(this.subarray(t,e));else{var i=e-t;n=new Buffer(i,void 0);for(var f=0;i>f;f++)n[f]=this[f+t]}return n.length&&(n.parent=this.parent||this),n},Buffer.prototype.readUIntLE=function(t,e,r){t=0|t,e=0|e,r||checkOffset(t,e,this.length);for(var n=this[t],i=1,f=0;++f<e&&(i*=256);)n+=this[t+f]*i;return n},Buffer.prototype.readUIntBE=function(t,e,r){t=0|t,e=0|e,r||checkOffset(t,e,this.length);for(var n=this[t+--e],i=1;e>0&&(i*=256);)n+=this[t+--e]*i;return n},Buffer.prototype.readUInt8=function(t,e){return e||checkOffset(t,1,this.length),this[t]},Buffer.prototype.readUInt16LE=function(t,e){return e||checkOffset(t,2,this.length),this[t]|this[t+1]<<8},Buffer.prototype.readUInt16BE=function(t,e){return e||checkOffset(t,2,this.length),this[t]<<8|this[t+1]},Buffer.prototype.readUInt32LE=function(t,e){return e||checkOffset(t,4,this.length),(this[t]|this[t+1]<<8|this[t+2]<<16)+16777216*this[t+3]},Buffer.prototype.readUInt32BE=function(t,e){return e||checkOffset(t,4,this.length),16777216*this[t]+(this[t+1]<<16|this[t+2]<<8|this[t+3])},Buffer.prototype.readIntLE=function(t,e,r){t=0|t,e=0|e,r||checkOffset(t,e,this.length);for(var n=this[t],i=1,f=0;++f<e&&(i*=256);)n+=this[t+f]*i;return i*=128,n>=i&&(n-=Math.pow(2,8*e)),n},Buffer.prototype.readIntBE=function(t,e,r){t=0|t,e=0|e,r||checkOffset(t,e,this.length);for(var n=e,i=1,f=this[t+--n];n>0&&(i*=256);)f+=this[t+--n]*i;return i*=128,f>=i&&(f-=Math.pow(2,8*e)),f},Buffer.prototype.readInt8=function(t,e){return e||checkOffset(t,1,this.length),128&this[t]?-1*(255-this[t]+1):this[t]},Buffer.prototype.readInt16LE=function(t,e){e||checkOffset(t,2,this.length);var r=this[t]|this[t+1]<<8;return 32768&r?4294901760|r:r},Buffer.prototype.readInt16BE=function(t,e){e||checkOffset(t,2,this.length);var r=this[t+1]|this[t]<<8;return 32768&r?4294901760|r:r},Buffer.prototype.readInt32LE=function(t,e){return e||checkOffset(t,4,this.length),this[t]|this[t+1]<<8|this[t+2]<<16|this[t+3]<<24},Buffer.prototype.readInt32BE=function(t,e){return e||checkOffset(t,4,this.length),this[t]<<24|this[t+1]<<16|this[t+2]<<8|this[t+3]},Buffer.prototype.readFloatLE=function(t,e){return e||checkOffset(t,4,this.length),ieee754.read(this,t,!0,23,4)},Buffer.prototype.readFloatBE=function(t,e){return e||checkOffset(t,4,this.length),ieee754.read(this,t,!1,23,4)},Buffer.prototype.readDoubleLE=function(t,e){return e||checkOffset(t,8,this.length),ieee754.read(this,t,!0,52,8)},Buffer.prototype.readDoubleBE=function(t,e){return e||checkOffset(t,8,this.length),ieee754.read(this,t,!1,52,8)},Buffer.prototype.writeUIntLE=function(t,e,r,n){t=+t,e=0|e,r=0|r,n||checkInt(this,t,e,r,Math.pow(2,8*r),0);var i=1,f=0;for(this[e]=255&t;++f<r&&(i*=256);)this[e+f]=t/i&255;return e+r},Buffer.prototype.writeUIntBE=function(t,e,r,n){t=+t,e=0|e,r=0|r,n||checkInt(this,t,e,r,Math.pow(2,8*r),0);var i=r-1,f=1;for(this[e+i]=255&t;--i>=0&&(f*=256);)this[e+i]=t/f&255;return e+r},Buffer.prototype.writeUInt8=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,1,255,0),Buffer.TYPED_ARRAY_SUPPORT||(t=Math.floor(t)),this[e]=255&t,e+1},Buffer.prototype.writeUInt16LE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,2,65535,0),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=255&t,this[e+1]=t>>>8):objectWriteUInt16(this,t,e,!0),e+2},Buffer.prototype.writeUInt16BE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,2,65535,0),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=t>>>8,this[e+1]=255&t):objectWriteUInt16(this,t,e,!1),e+2},Buffer.prototype.writeUInt32LE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,4,4294967295,0),Buffer.TYPED_ARRAY_SUPPORT?(this[e+3]=t>>>24,this[e+2]=t>>>16,this[e+1]=t>>>8,this[e]=255&t):objectWriteUInt32(this,t,e,!0),e+4},Buffer.prototype.writeUInt32BE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,4,4294967295,0),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=t>>>24,this[e+1]=t>>>16,this[e+2]=t>>>8,this[e+3]=255&t):objectWriteUInt32(this,t,e,!1),e+4},Buffer.prototype.writeIntLE=function(t,e,r,n){if(t=+t,e=0|e,!n){var i=Math.pow(2,8*r-1);checkInt(this,t,e,r,i-1,-i)}var f=0,o=1,u=0>t?1:0;for(this[e]=255&t;++f<r&&(o*=256);)this[e+f]=(t/o>>0)-u&255;return e+r},Buffer.prototype.writeIntBE=function(t,e,r,n){if(t=+t,e=0|e,!n){var i=Math.pow(2,8*r-1);checkInt(this,t,e,r,i-1,-i)}var f=r-1,o=1,u=0>t?1:0;for(this[e+f]=255&t;--f>=0&&(o*=256);)this[e+f]=(t/o>>0)-u&255;return e+r},Buffer.prototype.writeInt8=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,1,127,-128),Buffer.TYPED_ARRAY_SUPPORT||(t=Math.floor(t)),0>t&&(t=255+t+1),this[e]=255&t,e+1},Buffer.prototype.writeInt16LE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,2,32767,-32768),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=255&t,this[e+1]=t>>>8):objectWriteUInt16(this,t,e,!0),e+2},Buffer.prototype.writeInt16BE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,2,32767,-32768),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=t>>>8,this[e+1]=255&t):objectWriteUInt16(this,t,e,!1),e+2},Buffer.prototype.writeInt32LE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,4,2147483647,-2147483648),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=255&t,this[e+1]=t>>>8,this[e+2]=t>>>16,this[e+3]=t>>>24):objectWriteUInt32(this,t,e,!0),e+4},Buffer.prototype.writeInt32BE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,4,2147483647,-2147483648),0>t&&(t=4294967295+t+1),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=t>>>24,this[e+1]=t>>>16,this[e+2]=t>>>8,this[e+3]=255&t):objectWriteUInt32(this,t,e,!1),e+4},Buffer.prototype.writeFloatLE=function(t,e,r){return writeFloat(this,t,e,!0,r)},Buffer.prototype.writeFloatBE=function(t,e,r){return writeFloat(this,t,e,!1,r)},Buffer.prototype.writeDoubleLE=function(t,e,r){return writeDouble(this,t,e,!0,r)},Buffer.prototype.writeDoubleBE=function(t,e,r){return writeDouble(this,t,e,!1,r)},Buffer.prototype.copy=function(t,e,r,n){if(r||(r=0),n||0===n||(n=this.length),e>=t.length&&(e=t.length),e||(e=0),n>0&&r>n&&(n=r),n===r)return 0;if(0===t.length||0===this.length)return 0;if(0>e)throw new RangeError("targetStart out of bounds");if(0>r||r>=this.length)throw new RangeError("sourceStart out of bounds");if(0>n)throw new RangeError("sourceEnd out of bounds");n>this.length&&(n=this.length),t.length-e<n-r&&(n=t.length-e+r);var i,f=n-r;if(this===t&&e>r&&n>e)for(i=f-1;i>=0;i--)t[i+e]=this[i+r];else if(1e3>f||!Buffer.TYPED_ARRAY_SUPPORT)for(i=0;f>i;i++)t[i+e]=this[i+r];else t._set(this.subarray(r,r+f),e);return f},Buffer.prototype.fill=function(t,e,r){if(t||(t=0),e||(e=0),r||(r=this.length),e>r)throw new RangeError("end < start");if(r!==e&&0!==this.length){if(0>e||e>=this.length)throw new RangeError("start out of bounds");if(0>r||r>this.length)throw new RangeError("end out of bounds");var n;if("number"==typeof t)for(n=e;r>n;n++)this[n]=t;else{var i=utf8ToBytes(t.toString()),f=i.length;for(n=e;r>n;n++)this[n]=i[n%f]}return this}},Buffer.prototype.toArrayBuffer=function(){if("undefined"!=typeof Uint8Array){if(Buffer.TYPED_ARRAY_SUPPORT)return new Buffer(this).buffer;for(var t=new Uint8Array(this.length),e=0,r=t.length;r>e;e+=1)t[e]=this[e];return t.buffer}throw new TypeError("Buffer.toArrayBuffer not supported in this browser")};var BP=Buffer.prototype;Buffer._augment=function(t){return t.constructor=Buffer,t._isBuffer=!0,t._set=t.set,t.get=BP.get,t.set=BP.set,t.write=BP.write,t.toString=BP.toString,t.toLocaleString=BP.toString,t.toJSON=BP.toJSON,t.equals=BP.equals,t.compare=BP.compare,t.indexOf=BP.indexOf,t.copy=BP.copy,t.slice=BP.slice,t.readUIntLE=BP.readUIntLE,t.readUIntBE=BP.readUIntBE,t.readUInt8=BP.readUInt8,t.readUInt16LE=BP.readUInt16LE,t.readUInt16BE=BP.readUInt16BE,t.readUInt32LE=BP.readUInt32LE,t.readUInt32BE=BP.readUInt32BE,t.readIntLE=BP.readIntLE,t.readIntBE=BP.readIntBE,t.readInt8=BP.readInt8,t.readInt16LE=BP.readInt16LE,t.readInt16BE=BP.readInt16BE,t.readInt32LE=BP.readInt32LE,t.readInt32BE=BP.readInt32BE,t.readFloatLE=BP.readFloatLE,t.readFloatBE=BP.readFloatBE,t.readDoubleLE=BP.readDoubleLE,t.readDoubleBE=BP.readDoubleBE,t.writeUInt8=BP.writeUInt8,t.writeUIntLE=BP.writeUIntLE,t.writeUIntBE=BP.writeUIntBE,t.writeUInt16LE=BP.writeUInt16LE,t.writeUInt16BE=BP.writeUInt16BE,t.writeUInt32LE=BP.writeUInt32LE,t.writeUInt32BE=BP.writeUInt32BE,t.writeIntLE=BP.writeIntLE,t.writeIntBE=BP.writeIntBE,t.writeInt8=BP.writeInt8,t.writeInt16LE=BP.writeInt16LE,t.writeInt16BE=BP.writeInt16BE,t.writeInt32LE=BP.writeInt32LE,t.writeInt32BE=BP.writeInt32BE,t.writeFloatLE=BP.writeFloatLE,t.writeFloatBE=BP.writeFloatBE,t.writeDoubleLE=BP.writeDoubleLE,t.writeDoubleBE=BP.writeDoubleBE,t.fill=BP.fill,t.inspect=BP.inspect,t.toArrayBuffer=BP.toArrayBuffer,t};var INVALID_BASE64_RE=/[^+\/0-9A-Za-z-_]/g;
+"use strict";function typedArraySupport(){function t(){}try{var e=new Uint8Array(1);return e.foo=function(){return 42},e.constructor=t,42===e.foo()&&e.constructor===t&&"function"==typeof e.subarray&&0===e.subarray(1,1).byteLength}catch(r){return!1}}function kMaxLength(){return Buffer.TYPED_ARRAY_SUPPORT?2147483647:1073741823}function Buffer(t){return this instanceof Buffer?(Buffer.TYPED_ARRAY_SUPPORT||(this.length=0,this.parent=void 0),"number"==typeof t?fromNumber(this,t):"string"==typeof t?fromString(this,t,arguments.length>1?arguments[1]:"utf8"):fromObject(this,t)):arguments.length>1?new Buffer(t,arguments[1]):new Buffer(t)}function fromNumber(t,e){if(t=allocate(t,0>e?0:0|checked(e)),!Buffer.TYPED_ARRAY_SUPPORT)for(var r=0;e>r;r++)t[r]=0;return t}function fromString(t,e,r){("string"!=typeof r||""===r)&&(r="utf8");var n=0|byteLength(e,r);return t=allocate(t,n),t.write(e,r),t}function fromObject(t,e){if(Buffer.isBuffer(e))return fromBuffer(t,e);if(isArray(e))return fromArray(t,e);if(null==e)throw new TypeError("must start with number, buffer, array or string");if("undefined"!=typeof ArrayBuffer){if(e.buffer instanceof ArrayBuffer)return fromTypedArray(t,e);if(e instanceof ArrayBuffer)return fromArrayBuffer(t,e)}return e.length?fromArrayLike(t,e):fromJsonObject(t,e)}function fromBuffer(t,e){var r=0|checked(e.length);return t=allocate(t,r),e.copy(t,0,0,r),t}function fromArray(t,e){var r=0|checked(e.length);t=allocate(t,r);for(var n=0;r>n;n+=1)t[n]=255&e[n];return t}function fromTypedArray(t,e){var r=0|checked(e.length);t=allocate(t,r);for(var n=0;r>n;n+=1)t[n]=255&e[n];return t}function fromArrayBuffer(t,e){return Buffer.TYPED_ARRAY_SUPPORT?(e.byteLength,t=Buffer._augment(new Uint8Array(e))):t=fromTypedArray(t,new Uint8Array(e)),t}function fromArrayLike(t,e){var r=0|checked(e.length);t=allocate(t,r);for(var n=0;r>n;n+=1)t[n]=255&e[n];return t}function fromJsonObject(t,e){var r,n=0;"Buffer"===e.type&&isArray(e.data)&&(r=e.data,n=0|checked(r.length)),t=allocate(t,n);for(var f=0;n>f;f+=1)t[f]=255&r[f];return t}function allocate(t,e){Buffer.TYPED_ARRAY_SUPPORT?(t=Buffer._augment(new Uint8Array(e)),t.__proto__=Buffer.prototype):(t.length=e,t._isBuffer=!0);var r=0!==e&&e<=Buffer.poolSize>>>1;return r&&(t.parent=rootParent),t}function checked(t){if(t>=kMaxLength())throw new RangeError("Attempt to allocate Buffer larger than maximum size: 0x"+kMaxLength().toString(16)+" bytes");return 0|t}function SlowBuffer(t,e){if(!(this instanceof SlowBuffer))return new SlowBuffer(t,e);var r=new Buffer(t,e);return delete r.parent,r}function byteLength(t,e){"string"!=typeof t&&(t=""+t);var r=t.length;if(0===r)return 0;for(var n=!1;;)switch(e){case"ascii":case"binary":case"raw":case"raws":return r;case"utf8":case"utf-8":return utf8ToBytes(t).length;case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return 2*r;case"hex":return r>>>1;case"base64":return base64ToBytes(t).length;default:if(n)return utf8ToBytes(t).length;e=(""+e).toLowerCase(),n=!0}}function slowToString(t,e,r){var n=!1;if(e=0|e,r=void 0===r||r===1/0?this.length:0|r,t||(t="utf8"),0>e&&(e=0),r>this.length&&(r=this.length),e>=r)return"";for(;;)switch(t){case"hex":return hexSlice(this,e,r);case"utf8":case"utf-8":return utf8Slice(this,e,r);case"ascii":return asciiSlice(this,e,r);case"binary":return binarySlice(this,e,r);case"base64":return base64Slice(this,e,r);case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return utf16leSlice(this,e,r);default:if(n)throw new TypeError("Unknown encoding: "+t);t=(t+"").toLowerCase(),n=!0}}function hexWrite(t,e,r,n){r=Number(r)||0;var f=t.length-r;n?(n=Number(n),n>f&&(n=f)):n=f;var i=e.length;if(i%2!==0)throw new Error("Invalid hex string");n>i/2&&(n=i/2);for(var o=0;n>o;o++){var u=parseInt(e.substr(2*o,2),16);if(isNaN(u))throw new Error("Invalid hex string");t[r+o]=u}return o}function utf8Write(t,e,r,n){return blitBuffer(utf8ToBytes(e,t.length-r),t,r,n)}function asciiWrite(t,e,r,n){return blitBuffer(asciiToBytes(e),t,r,n)}function binaryWrite(t,e,r,n){return asciiWrite(t,e,r,n)}function base64Write(t,e,r,n){return blitBuffer(base64ToBytes(e),t,r,n)}function ucs2Write(t,e,r,n){return blitBuffer(utf16leToBytes(e,t.length-r),t,r,n)}function base64Slice(t,e,r){return 0===e&&r===t.length?base64.fromByteArray(t):base64.fromByteArray(t.slice(e,r))}function utf8Slice(t,e,r){r=Math.min(t.length,r);for(var n=[],f=e;r>f;){var i=t[f],o=null,u=i>239?4:i>223?3:i>191?2:1;if(r>=f+u){var s,a,h,c;switch(u){case 1:128>i&&(o=i);break;case 2:s=t[f+1],128===(192&s)&&(c=(31&i)<<6|63&s,c>127&&(o=c));break;case 3:s=t[f+1],a=t[f+2],128===(192&s)&&128===(192&a)&&(c=(15&i)<<12|(63&s)<<6|63&a,c>2047&&(55296>c||c>57343)&&(o=c));break;case 4:s=t[f+1],a=t[f+2],h=t[f+3],128===(192&s)&&128===(192&a)&&128===(192&h)&&(c=(15&i)<<18|(63&s)<<12|(63&a)<<6|63&h,c>65535&&1114112>c&&(o=c))}}null===o?(o=65533,u=1):o>65535&&(o-=65536,n.push(o>>>10&1023|55296),o=56320|1023&o),n.push(o),f+=u}return decodeCodePointsArray(n)}function decodeCodePointsArray(t){var e=t.length;if(MAX_ARGUMENTS_LENGTH>=e)return String.fromCharCode.apply(String,t);for(var r="",n=0;e>n;)r+=String.fromCharCode.apply(String,t.slice(n,n+=MAX_ARGUMENTS_LENGTH));return r}function asciiSlice(t,e,r){var n="";r=Math.min(t.length,r);for(var f=e;r>f;f++)n+=String.fromCharCode(127&t[f]);return n}function binarySlice(t,e,r){var n="";r=Math.min(t.length,r);for(var f=e;r>f;f++)n+=String.fromCharCode(t[f]);return n}function hexSlice(t,e,r){var n=t.length;(!e||0>e)&&(e=0),(!r||0>r||r>n)&&(r=n);for(var f="",i=e;r>i;i++)f+=toHex(t[i]);return f}function utf16leSlice(t,e,r){for(var n=t.slice(e,r),f="",i=0;i<n.length;i+=2)f+=String.fromCharCode(n[i]+256*n[i+1]);return f}function checkOffset(t,e,r){if(t%1!==0||0>t)throw new RangeError("offset is not uint");if(t+e>r)throw new RangeError("Trying to access beyond buffer length")}function checkInt(t,e,r,n,f,i){if(!Buffer.isBuffer(t))throw new TypeError("buffer must be a Buffer instance");if(e>f||i>e)throw new RangeError("value is out of bounds");if(r+n>t.length)throw new RangeError("index out of range")}function objectWriteUInt16(t,e,r,n){0>e&&(e=65535+e+1);for(var f=0,i=Math.min(t.length-r,2);i>f;f++)t[r+f]=(e&255<<8*(n?f:1-f))>>>8*(n?f:1-f)}function objectWriteUInt32(t,e,r,n){0>e&&(e=4294967295+e+1);for(var f=0,i=Math.min(t.length-r,4);i>f;f++)t[r+f]=e>>>8*(n?f:3-f)&255}function checkIEEE754(t,e,r,n,f,i){if(e>f||i>e)throw new RangeError("value is out of bounds");if(r+n>t.length)throw new RangeError("index out of range");if(0>r)throw new RangeError("index out of range")}function writeFloat(t,e,r,n,f){return f||checkIEEE754(t,e,r,4,3.4028234663852886e38,-3.4028234663852886e38),ieee754.write(t,e,r,n,23,4),r+4}function writeDouble(t,e,r,n,f){return f||checkIEEE754(t,e,r,8,1.7976931348623157e308,-1.7976931348623157e308),ieee754.write(t,e,r,n,52,8),r+8}function base64clean(t){if(t=stringtrim(t).replace(INVALID_BASE64_RE,""),t.length<2)return"";for(;t.length%4!==0;)t+="=";return t}function stringtrim(t){return t.trim?t.trim():t.replace(/^\s+|\s+$/g,"")}function toHex(t){return 16>t?"0"+t.toString(16):t.toString(16)}function utf8ToBytes(t,e){e=e||1/0;for(var r,n=t.length,f=null,i=[],o=0;n>o;o++){if(r=t.charCodeAt(o),r>55295&&57344>r){if(!f){if(r>56319){(e-=3)>-1&&i.push(239,191,189);continue}if(o+1===n){(e-=3)>-1&&i.push(239,191,189);continue}f=r;continue}if(56320>r){(e-=3)>-1&&i.push(239,191,189),f=r;continue}r=(f-55296<<10|r-56320)+65536}else f&&(e-=3)>-1&&i.push(239,191,189);if(f=null,128>r){if((e-=1)<0)break;i.push(r)}else if(2048>r){if((e-=2)<0)break;i.push(r>>6|192,63&r|128)}else if(65536>r){if((e-=3)<0)break;i.push(r>>12|224,r>>6&63|128,63&r|128)}else{if(!(1114112>r))throw new Error("Invalid code point");if((e-=4)<0)break;i.push(r>>18|240,r>>12&63|128,r>>6&63|128,63&r|128)}}return i}function asciiToBytes(t){for(var e=[],r=0;r<t.length;r++)e.push(255&t.charCodeAt(r));return e}function utf16leToBytes(t,e){for(var r,n,f,i=[],o=0;o<t.length&&!((e-=2)<0);o++)r=t.charCodeAt(o),n=r>>8,f=r%256,i.push(f),i.push(n);return i}function base64ToBytes(t){return base64.toByteArray(base64clean(t))}function blitBuffer(t,e,r,n){for(var f=0;n>f&&!(f+r>=e.length||f>=t.length);f++)e[f+r]=t[f];return f}var base64=require("base64-js"),ieee754=require("ieee754"),isArray=require("isarray");exports.Buffer=Buffer,exports.SlowBuffer=SlowBuffer,exports.INSPECT_MAX_BYTES=50,Buffer.poolSize=8192;var rootParent={};Buffer.TYPED_ARRAY_SUPPORT=void 0!==global.TYPED_ARRAY_SUPPORT?global.TYPED_ARRAY_SUPPORT:typedArraySupport(),Buffer.TYPED_ARRAY_SUPPORT?(Buffer.prototype.__proto__=Uint8Array.prototype,Buffer.__proto__=Uint8Array):(Buffer.prototype.length=void 0,Buffer.prototype.parent=void 0),Buffer.isBuffer=function(t){return!(null==t||!t._isBuffer)},Buffer.compare=function(t,e){if(!Buffer.isBuffer(t)||!Buffer.isBuffer(e))throw new TypeError("Arguments must be Buffers");if(t===e)return 0;for(var r=t.length,n=e.length,f=0,i=Math.min(r,n);i>f&&t[f]===e[f];)++f;return f!==i&&(r=t[f],n=e[f]),n>r?-1:r>n?1:0},Buffer.isEncoding=function(t){switch(String(t).toLowerCase()){case"hex":case"utf8":case"utf-8":case"ascii":case"binary":case"base64":case"raw":case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return!0;default:return!1}},Buffer.concat=function(t,e){if(!isArray(t))throw new TypeError("list argument must be an Array of Buffers.");if(0===t.length)return new Buffer(0);var r;if(void 0===e)for(e=0,r=0;r<t.length;r++)e+=t[r].length;var n=new Buffer(e),f=0;for(r=0;r<t.length;r++){var i=t[r];i.copy(n,f),f+=i.length}return n},Buffer.byteLength=byteLength,Buffer.prototype.toString=function(){var t=0|this.length;return 0===t?"":0===arguments.length?utf8Slice(this,0,t):slowToString.apply(this,arguments)},Buffer.prototype.equals=function(t){if(!Buffer.isBuffer(t))throw new TypeError("Argument must be a Buffer");return this===t?!0:0===Buffer.compare(this,t)},Buffer.prototype.inspect=function(){var t="",e=exports.INSPECT_MAX_BYTES;return this.length>0&&(t=this.toString("hex",0,e).match(/.{2}/g).join(" "),this.length>e&&(t+=" ... ")),"<Buffer "+t+">"},Buffer.prototype.compare=function(t){if(!Buffer.isBuffer(t))throw new TypeError("Argument must be a Buffer");return this===t?0:Buffer.compare(this,t)},Buffer.prototype.indexOf=function(t,e){function r(t,e,r){for(var n=-1,f=0;r+f<t.length;f++)if(t[r+f]===e[-1===n?0:f-n]){if(-1===n&&(n=f),f-n+1===e.length)return r+n}else n=-1;return-1}if(e>2147483647?e=2147483647:-2147483648>e&&(e=-2147483648),e>>=0,0===this.length)return-1;if(e>=this.length)return-1;if(0>e&&(e=Math.max(this.length+e,0)),"string"==typeof t)return 0===t.length?-1:String.prototype.indexOf.call(this,t,e);if(Buffer.isBuffer(t))return r(this,t,e);if("number"==typeof t)return Buffer.TYPED_ARRAY_SUPPORT&&"function"===Uint8Array.prototype.indexOf?Uint8Array.prototype.indexOf.call(this,t,e):r(this,[t],e);throw new TypeError("val must be string, number or Buffer")},Buffer.prototype.get=function(t){return console.log(".get() is deprecated. Access using array indexes instead."),this.readUInt8(t)},Buffer.prototype.set=function(t,e){return console.log(".set() is deprecated. Access using array indexes instead."),this.writeUInt8(t,e)},Buffer.prototype.write=function(t,e,r,n){if(void 0===e)n="utf8",r=this.length,e=0;else if(void 0===r&&"string"==typeof e)n=e,r=this.length,e=0;else if(isFinite(e))e=0|e,isFinite(r)?(r=0|r,void 0===n&&(n="utf8")):(n=r,r=void 0);else{var f=n;n=e,e=0|r,r=f}var i=this.length-e;if((void 0===r||r>i)&&(r=i),t.length>0&&(0>r||0>e)||e>this.length)throw new RangeError("attempt to write outside buffer bounds");n||(n="utf8");for(var o=!1;;)switch(n){case"hex":return hexWrite(this,t,e,r);case"utf8":case"utf-8":return utf8Write(this,t,e,r);case"ascii":return asciiWrite(this,t,e,r);case"binary":return binaryWrite(this,t,e,r);case"base64":return base64Write(this,t,e,r);case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":return ucs2Write(this,t,e,r);default:if(o)throw new TypeError("Unknown encoding: "+n);n=(""+n).toLowerCase(),o=!0}},Buffer.prototype.toJSON=function(){return{type:"Buffer",data:Array.prototype.slice.call(this._arr||this,0)}};var MAX_ARGUMENTS_LENGTH=4096;Buffer.prototype.slice=function(t,e){var r=this.length;t=~~t,e=void 0===e?r:~~e,0>t?(t+=r,0>t&&(t=0)):t>r&&(t=r),0>e?(e+=r,0>e&&(e=0)):e>r&&(e=r),t>e&&(e=t);var n;if(Buffer.TYPED_ARRAY_SUPPORT)n=Buffer._augment(this.subarray(t,e));else{var f=e-t;n=new Buffer(f,void 0);for(var i=0;f>i;i++)n[i]=this[i+t]}return n.length&&(n.parent=this.parent||this),n},Buffer.prototype.readUIntLE=function(t,e,r){t=0|t,e=0|e,r||checkOffset(t,e,this.length);for(var n=this[t],f=1,i=0;++i<e&&(f*=256);)n+=this[t+i]*f;return n},Buffer.prototype.readUIntBE=function(t,e,r){t=0|t,e=0|e,r||checkOffset(t,e,this.length);for(var n=this[t+--e],f=1;e>0&&(f*=256);)n+=this[t+--e]*f;return n},Buffer.prototype.readUInt8=function(t,e){return e||checkOffset(t,1,this.length),this[t]},Buffer.prototype.readUInt16LE=function(t,e){return e||checkOffset(t,2,this.length),this[t]|this[t+1]<<8},Buffer.prototype.readUInt16BE=function(t,e){return e||checkOffset(t,2,this.length),this[t]<<8|this[t+1]},Buffer.prototype.readUInt32LE=function(t,e){return e||checkOffset(t,4,this.length),(this[t]|this[t+1]<<8|this[t+2]<<16)+16777216*this[t+3]},Buffer.prototype.readUInt32BE=function(t,e){return e||checkOffset(t,4,this.length),16777216*this[t]+(this[t+1]<<16|this[t+2]<<8|this[t+3])},Buffer.prototype.readIntLE=function(t,e,r){t=0|t,e=0|e,r||checkOffset(t,e,this.length);for(var n=this[t],f=1,i=0;++i<e&&(f*=256);)n+=this[t+i]*f;return f*=128,n>=f&&(n-=Math.pow(2,8*e)),n},Buffer.prototype.readIntBE=function(t,e,r){t=0|t,e=0|e,r||checkOffset(t,e,this.length);for(var n=e,f=1,i=this[t+--n];n>0&&(f*=256);)i+=this[t+--n]*f;return f*=128,i>=f&&(i-=Math.pow(2,8*e)),i},Buffer.prototype.readInt8=function(t,e){return e||checkOffset(t,1,this.length),128&this[t]?-1*(255-this[t]+1):this[t]},Buffer.prototype.readInt16LE=function(t,e){e||checkOffset(t,2,this.length);var r=this[t]|this[t+1]<<8;return 32768&r?4294901760|r:r},Buffer.prototype.readInt16BE=function(t,e){e||checkOffset(t,2,this.length);var r=this[t+1]|this[t]<<8;return 32768&r?4294901760|r:r},Buffer.prototype.readInt32LE=function(t,e){return e||checkOffset(t,4,this.length),this[t]|this[t+1]<<8|this[t+2]<<16|this[t+3]<<24},Buffer.prototype.readInt32BE=function(t,e){return e||checkOffset(t,4,this.length),this[t]<<24|this[t+1]<<16|this[t+2]<<8|this[t+3]},Buffer.prototype.readFloatLE=function(t,e){return e||checkOffset(t,4,this.length),ieee754.read(this,t,!0,23,4)},Buffer.prototype.readFloatBE=function(t,e){return e||checkOffset(t,4,this.length),ieee754.read(this,t,!1,23,4)},Buffer.prototype.readDoubleLE=function(t,e){return e||checkOffset(t,8,this.length),ieee754.read(this,t,!0,52,8)},Buffer.prototype.readDoubleBE=function(t,e){return e||checkOffset(t,8,this.length),ieee754.read(this,t,!1,52,8)},Buffer.prototype.writeUIntLE=function(t,e,r,n){t=+t,e=0|e,r=0|r,n||checkInt(this,t,e,r,Math.pow(2,8*r),0);var f=1,i=0;for(this[e]=255&t;++i<r&&(f*=256);)this[e+i]=t/f&255;return e+r},Buffer.prototype.writeUIntBE=function(t,e,r,n){t=+t,e=0|e,r=0|r,n||checkInt(this,t,e,r,Math.pow(2,8*r),0);var f=r-1,i=1;for(this[e+f]=255&t;--f>=0&&(i*=256);)this[e+f]=t/i&255;return e+r},Buffer.prototype.writeUInt8=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,1,255,0),Buffer.TYPED_ARRAY_SUPPORT||(t=Math.floor(t)),this[e]=255&t,e+1},Buffer.prototype.writeUInt16LE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,2,65535,0),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=255&t,this[e+1]=t>>>8):objectWriteUInt16(this,t,e,!0),e+2},Buffer.prototype.writeUInt16BE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,2,65535,0),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=t>>>8,this[e+1]=255&t):objectWriteUInt16(this,t,e,!1),e+2},Buffer.prototype.writeUInt32LE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,4,4294967295,0),Buffer.TYPED_ARRAY_SUPPORT?(this[e+3]=t>>>24,this[e+2]=t>>>16,this[e+1]=t>>>8,this[e]=255&t):objectWriteUInt32(this,t,e,!0),e+4},Buffer.prototype.writeUInt32BE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,4,4294967295,0),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=t>>>24,this[e+1]=t>>>16,this[e+2]=t>>>8,this[e+3]=255&t):objectWriteUInt32(this,t,e,!1),e+4},Buffer.prototype.writeIntLE=function(t,e,r,n){if(t=+t,e=0|e,!n){var f=Math.pow(2,8*r-1);checkInt(this,t,e,r,f-1,-f)}var i=0,o=1,u=0>t?1:0;for(this[e]=255&t;++i<r&&(o*=256);)this[e+i]=(t/o>>0)-u&255;return e+r},Buffer.prototype.writeIntBE=function(t,e,r,n){if(t=+t,e=0|e,!n){var f=Math.pow(2,8*r-1);checkInt(this,t,e,r,f-1,-f)}var i=r-1,o=1,u=0>t?1:0;for(this[e+i]=255&t;--i>=0&&(o*=256);)this[e+i]=(t/o>>0)-u&255;return e+r},Buffer.prototype.writeInt8=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,1,127,-128),Buffer.TYPED_ARRAY_SUPPORT||(t=Math.floor(t)),0>t&&(t=255+t+1),this[e]=255&t,e+1},Buffer.prototype.writeInt16LE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,2,32767,-32768),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=255&t,this[e+1]=t>>>8):objectWriteUInt16(this,t,e,!0),e+2},Buffer.prototype.writeInt16BE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,2,32767,-32768),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=t>>>8,this[e+1]=255&t):objectWriteUInt16(this,t,e,!1),e+2},Buffer.prototype.writeInt32LE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,4,2147483647,-2147483648),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=255&t,this[e+1]=t>>>8,this[e+2]=t>>>16,this[e+3]=t>>>24):objectWriteUInt32(this,t,e,!0),e+4},Buffer.prototype.writeInt32BE=function(t,e,r){return t=+t,e=0|e,r||checkInt(this,t,e,4,2147483647,-2147483648),0>t&&(t=4294967295+t+1),Buffer.TYPED_ARRAY_SUPPORT?(this[e]=t>>>24,this[e+1]=t>>>16,this[e+2]=t>>>8,this[e+3]=255&t):objectWriteUInt32(this,t,e,!1),e+4},Buffer.prototype.writeFloatLE=function(t,e,r){return writeFloat(this,t,e,!0,r)},Buffer.prototype.writeFloatBE=function(t,e,r){return writeFloat(this,t,e,!1,r)},Buffer.prototype.writeDoubleLE=function(t,e,r){return writeDouble(this,t,e,!0,r)},Buffer.prototype.writeDoubleBE=function(t,e,r){return writeDouble(this,t,e,!1,r)},Buffer.prototype.copy=function(t,e,r,n){if(r||(r=0),n||0===n||(n=this.length),e>=t.length&&(e=t.length),e||(e=0),n>0&&r>n&&(n=r),n===r)return 0;if(0===t.length||0===this.length)return 0;if(0>e)throw new RangeError("targetStart out of bounds");if(0>r||r>=this.length)throw new RangeError("sourceStart out of bounds");if(0>n)throw new RangeError("sourceEnd out of bounds");n>this.length&&(n=this.length),t.length-e<n-r&&(n=t.length-e+r);var f,i=n-r;if(this===t&&e>r&&n>e)for(f=i-1;f>=0;f--)t[f+e]=this[f+r];else if(1e3>i||!Buffer.TYPED_ARRAY_SUPPORT)for(f=0;i>f;f++)t[f+e]=this[f+r];else t._set(this.subarray(r,r+i),e);return i},Buffer.prototype.fill=function(t,e,r){if(t||(t=0),e||(e=0),r||(r=this.length),e>r)throw new RangeError("end < start");if(r!==e&&0!==this.length){if(0>e||e>=this.length)throw new RangeError("start out of bounds");if(0>r||r>this.length)throw new RangeError("end out of bounds");var n;if("number"==typeof t)for(n=e;r>n;n++)this[n]=t;else{var f=utf8ToBytes(t.toString()),i=f.length;for(n=e;r>n;n++)this[n]=f[n%i]}return this}},Buffer.prototype.toArrayBuffer=function(){if("undefined"!=typeof Uint8Array){if(Buffer.TYPED_ARRAY_SUPPORT)return new Buffer(this).buffer;for(var t=new Uint8Array(this.length),e=0,r=t.length;r>e;e+=1)t[e]=this[e];return t.buffer}throw new TypeError("Buffer.toArrayBuffer not supported in this browser")};var BP=Buffer.prototype;Buffer._augment=function(t){return t.constructor=Buffer,t._isBuffer=!0,t._set=t.set,t.get=BP.get,t.set=BP.set,t.write=BP.write,t.toString=BP.toString,t.toLocaleString=BP.toString,t.toJSON=BP.toJSON,t.equals=BP.equals,t.compare=BP.compare,t.indexOf=BP.indexOf,t.copy=BP.copy,t.slice=BP.slice,t.readUIntLE=BP.readUIntLE,t.readUIntBE=BP.readUIntBE,t.readUInt8=BP.readUInt8,t.readUInt16LE=BP.readUInt16LE,t.readUInt16BE=BP.readUInt16BE,t.readUInt32LE=BP.readUInt32LE,t.readUInt32BE=BP.readUInt32BE,t.readIntLE=BP.readIntLE,t.readIntBE=BP.readIntBE,t.readInt8=BP.readInt8,t.readInt16LE=BP.readInt16LE,t.readInt16BE=BP.readInt16BE,t.readInt32LE=BP.readInt32LE,t.readInt32BE=BP.readInt32BE,t.readFloatLE=BP.readFloatLE,t.readFloatBE=BP.readFloatBE,t.readDoubleLE=BP.readDoubleLE,t.readDoubleBE=BP.readDoubleBE,t.writeUInt8=BP.writeUInt8,t.writeUIntLE=BP.writeUIntLE,t.writeUIntBE=BP.writeUIntBE,t.writeUInt16LE=BP.writeUInt16LE,t.writeUInt16BE=BP.writeUInt16BE,t.writeUInt32LE=BP.writeUInt32LE,t.writeUInt32BE=BP.writeUInt32BE,t.writeIntLE=BP.writeIntLE,t.writeIntBE=BP.writeIntBE,t.writeInt8=BP.writeInt8,t.writeInt16LE=BP.writeInt16LE,t.writeInt16BE=BP.writeInt16BE,t.writeInt32LE=BP.writeInt32LE,t.writeInt32BE=BP.writeInt32BE,t.writeFloatLE=BP.writeFloatLE,t.writeFloatBE=BP.writeFloatBE,t.writeDoubleLE=BP.writeDoubleLE,t.writeDoubleBE=BP.writeDoubleBE,t.fill=BP.fill,t.inspect=BP.inspect,t.toArrayBuffer=BP.toArrayBuffer,t};var INVALID_BASE64_RE=/[^+\/0-9A-Za-z-_]/g;
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{"base64-js":14,"ieee754":28,"is-array":31}],18:[function(require,module,exports){
-module.exports={100:"Continue",101:"Switching Protocols",102:"Processing",200:"OK",201:"Created",202:"Accepted",203:"Non-Authoritative Information",204:"No Content",205:"Reset Content",206:"Partial Content",207:"Multi-Status",300:"Multiple Choices",301:"Moved Permanently",302:"Moved Temporarily",303:"See Other",304:"Not Modified",305:"Use Proxy",307:"Temporary Redirect",308:"Permanent Redirect",400:"Bad Request",401:"Unauthorized",402:"Payment Required",403:"Forbidden",404:"Not Found",405:"Method Not Allowed",406:"Not Acceptable",407:"Proxy Authentication Required",408:"Request Time-out",409:"Conflict",410:"Gone",411:"Length Required",412:"Precondition Failed",413:"Request Entity Too Large",414:"Request-URI Too Large",415:"Unsupported Media Type",416:"Requested Range Not Satisfiable",417:"Expectation Failed",418:"I'm a teapot",422:"Unprocessable Entity",423:"Locked",424:"Failed Dependency",425:"Unordered Collection",426:"Upgrade Required",428:"Precondition Required",429:"Too Many Requests",431:"Request Header Fields Too Large",500:"Internal Server Error",501:"Not Implemented",502:"Bad Gateway",503:"Service Unavailable",504:"Gateway Time-out",505:"HTTP Version Not Supported",506:"Variant Also Negotiates",507:"Insufficient Storage",509:"Bandwidth Limit Exceeded",510:"Not Extended",511:"Network Authentication Required"};
+},{"base64-js":14,"ieee754":28,"isarray":18}],18:[function(require,module,exports){
+var toString={}.toString;module.exports=Array.isArray||function(r){return"[object Array]"==toString.call(r)};
 
 },{}],19:[function(require,module,exports){
+module.exports={100:"Continue",101:"Switching Protocols",102:"Processing",200:"OK",201:"Created",202:"Accepted",203:"Non-Authoritative Information",204:"No Content",205:"Reset Content",206:"Partial Content",207:"Multi-Status",300:"Multiple Choices",301:"Moved Permanently",302:"Moved Temporarily",303:"See Other",304:"Not Modified",305:"Use Proxy",307:"Temporary Redirect",308:"Permanent Redirect",400:"Bad Request",401:"Unauthorized",402:"Payment Required",403:"Forbidden",404:"Not Found",405:"Method Not Allowed",406:"Not Acceptable",407:"Proxy Authentication Required",408:"Request Time-out",409:"Conflict",410:"Gone",411:"Length Required",412:"Precondition Failed",413:"Request Entity Too Large",414:"Request-URI Too Large",415:"Unsupported Media Type",416:"Requested Range Not Satisfiable",417:"Expectation Failed",418:"I'm a teapot",422:"Unprocessable Entity",423:"Locked",424:"Failed Dependency",425:"Unordered Collection",426:"Upgrade Required",428:"Precondition Required",429:"Too Many Requests",431:"Request Header Fields Too Large",500:"Internal Server Error",501:"Not Implemented",502:"Bad Gateway",503:"Service Unavailable",504:"Gateway Time-out",505:"HTTP Version Not Supported",506:"Variant Also Negotiates",507:"Insufficient Storage",509:"Bandwidth Limit Exceeded",510:"Not Extended",511:"Network Authentication Required"};
+
+},{}],20:[function(require,module,exports){
 (function (process,global){
 "use strict";var next=global.process&&process.nextTick||global.setImmediate||function(n){setTimeout(n,0)};module.exports=function(n,t){return n?void t.then(function(t){next(function(){n(null,t)})},function(t){next(function(){n(t)})}):t};
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{"_process":67}],20:[function(require,module,exports){
+},{"_process":67}],21:[function(require,module,exports){
 (function (Buffer){
-function isArray(e){return Array.isArray(e)}function isBoolean(e){return"boolean"==typeof e}function isNull(e){return null===e}function isNullOrUndefined(e){return null==e}function isNumber(e){return"number"==typeof e}function isString(e){return"string"==typeof e}function isSymbol(e){return"symbol"==typeof e}function isUndefined(e){return void 0===e}function isRegExp(e){return isObject(e)&&"[object RegExp]"===objectToString(e)}function isObject(e){return"object"==typeof e&&null!==e}function isDate(e){return isObject(e)&&"[object Date]"===objectToString(e)}function isError(e){return isObject(e)&&("[object Error]"===objectToString(e)||e instanceof Error)}function isFunction(e){return"function"==typeof e}function isPrimitive(e){return null===e||"boolean"==typeof e||"number"==typeof e||"string"==typeof e||"symbol"==typeof e||"undefined"==typeof e}function isBuffer(e){return Buffer.isBuffer(e)}function objectToString(e){return Object.prototype.toString.call(e)}exports.isArray=isArray,exports.isBoolean=isBoolean,exports.isNull=isNull,exports.isNullOrUndefined=isNullOrUndefined,exports.isNumber=isNumber,exports.isString=isString,exports.isSymbol=isSymbol,exports.isUndefined=isUndefined,exports.isRegExp=isRegExp,exports.isObject=isObject,exports.isDate=isDate,exports.isError=isError,exports.isFunction=isFunction,exports.isPrimitive=isPrimitive,exports.isBuffer=isBuffer;
+function isArray(r){return Array.isArray?Array.isArray(r):"[object Array]"===objectToString(r)}function isBoolean(r){return"boolean"==typeof r}function isNull(r){return null===r}function isNullOrUndefined(r){return null==r}function isNumber(r){return"number"==typeof r}function isString(r){return"string"==typeof r}function isSymbol(r){return"symbol"==typeof r}function isUndefined(r){return void 0===r}function isRegExp(r){return"[object RegExp]"===objectToString(r)}function isObject(r){return"object"==typeof r&&null!==r}function isDate(r){return"[object Date]"===objectToString(r)}function isError(r){return"[object Error]"===objectToString(r)||r instanceof Error}function isFunction(r){return"function"==typeof r}function isPrimitive(r){return null===r||"boolean"==typeof r||"number"==typeof r||"string"==typeof r||"symbol"==typeof r||"undefined"==typeof r}function objectToString(r){return Object.prototype.toString.call(r)}exports.isArray=isArray,exports.isBoolean=isBoolean,exports.isNull=isNull,exports.isNullOrUndefined=isNullOrUndefined,exports.isNumber=isNumber,exports.isString=isString,exports.isSymbol=isSymbol,exports.isUndefined=isUndefined,exports.isRegExp=isRegExp,exports.isObject=isObject,exports.isDate=isDate,exports.isError=isError,exports.isFunction=isFunction,exports.isPrimitive=isPrimitive,exports.isBuffer=Buffer.isBuffer;
 
 }).call(this,{"isBuffer":require("../../is-buffer/index.js")})
 
-},{"../../is-buffer/index.js":32}],21:[function(require,module,exports){
+},{"../../is-buffer/index.js":32}],22:[function(require,module,exports){
 function useColors(){return"WebkitAppearance"in document.documentElement.style||window.console&&(console.firebug||console.exception&&console.table)||navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/)&&parseInt(RegExp.$1,10)>=31}function formatArgs(){var o=arguments,e=this.useColors;if(o[0]=(e?"%c":"")+this.namespace+(e?" %c":" ")+o[0]+(e?"%c ":" ")+"+"+exports.humanize(this.diff),!e)return o;var r="color: "+this.color;o=[o[0],r,"color: inherit"].concat(Array.prototype.slice.call(o,1));var t=0,s=0;return o[0].replace(/%[a-z%]/g,function(o){"%%"!==o&&(t++,"%c"===o&&(s=t))}),o.splice(s,0,r),o}function log(){return"object"==typeof console&&console.log&&Function.prototype.apply.call(console.log,console,arguments)}function save(o){try{null==o?exports.storage.removeItem("debug"):exports.storage.debug=o}catch(e){}}function load(){var o;try{o=exports.storage.debug}catch(e){}return o}function localstorage(){try{return window.localStorage}catch(o){}}exports=module.exports=require("./debug"),exports.log=log,exports.formatArgs=formatArgs,exports.save=save,exports.load=load,exports.useColors=useColors,exports.storage="undefined"!=typeof chrome&&"undefined"!=typeof chrome.storage?chrome.storage.local:localstorage(),exports.colors=["lightseagreen","forestgreen","goldenrod","dodgerblue","darkorchid","crimson"],exports.formatters.j=function(o){return JSON.stringify(o)},exports.enable(load());
 
-},{"./debug":22}],22:[function(require,module,exports){
+},{"./debug":23}],23:[function(require,module,exports){
 function selectColor(){return exports.colors[prevColor++%exports.colors.length]}function debug(e){function r(){}function o(){var e=o,r=+new Date,s=r-(prevTime||r);e.diff=s,e.prev=prevTime,e.curr=r,prevTime=r,null==e.useColors&&(e.useColors=exports.useColors()),null==e.color&&e.useColors&&(e.color=selectColor());var t=Array.prototype.slice.call(arguments);t[0]=exports.coerce(t[0]),"string"!=typeof t[0]&&(t=["%o"].concat(t));var n=0;t[0]=t[0].replace(/%([a-z%])/g,function(r,o){if("%%"===r)return r;n++;var s=exports.formatters[o];if("function"==typeof s){var p=t[n];r=s.call(e,p),t.splice(n,1),n--}return r}),"function"==typeof exports.formatArgs&&(t=exports.formatArgs.apply(e,t));var p=o.log||exports.log||console.log.bind(console);p.apply(e,t)}r.enabled=!1,o.enabled=!0;var s=exports.enabled(e)?o:r;return s.namespace=e,s}function enable(e){exports.save(e);for(var r=(e||"").split(/[\s,]+/),o=r.length,s=0;o>s;s++)r[s]&&(e=r[s].replace(/\*/g,".*?"),"-"===e[0]?exports.skips.push(new RegExp("^"+e.substr(1)+"$")):exports.names.push(new RegExp("^"+e+"$")))}function disable(){exports.enable("")}function enabled(e){var r,o;for(r=0,o=exports.skips.length;o>r;r++)if(exports.skips[r].test(e))return!1;for(r=0,o=exports.names.length;o>r;r++)if(exports.names[r].test(e))return!0;return!1}function coerce(e){return e instanceof Error?e.stack||e.message:e}exports=module.exports=debug,exports.coerce=coerce,exports.disable=disable,exports.enable=enable,exports.enabled=enabled,exports.humanize=require("ms"),exports.names=[],exports.skips=[],exports.formatters={};var prevColor=0,prevTime;
 
-},{"ms":64}],23:[function(require,module,exports){
+},{"ms":64}],24:[function(require,module,exports){
 (function (process,global){
 /*!
  * @overview es6-promise - a tiny implementation of Promises/A+.
@@ -108,16 +111,13 @@ function selectColor(){return exports.colors[prevColor++%exports.colors.length]}
 
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this.type=ut.ForStatement,this.init=e,this.test=u,this.update=t,this.body=n,this.finish(),this},finishForOfStatement:function(e,u,t){return this.type=ut.ForOfStatement,this.left=e,this.right=u,this.body=t,this.finish(),this},finishForInStatement:function(e,u,t){return this.type=ut.ForInStatement,this.left=e,this.right=u,this.body=t,this.each=!1,this.finish(),this},finishFunctionDeclaration:function(e,u,t,n,i){return this.type=ut.FunctionDeclaration,this.id=e,this.params=u,this.defaults=t,this.body=n,this.generator=i,this.expression=!1,this.finish(),this},finishFunctionExpression:function(e,u,t,n,i){return this.type=ut.FunctionExpression,this.id=e,this.params=u,this.defaults=t,this.body=n,this.generator=i,this.expression=!1,this.finish(),this},finishIdentifier:function(e){return this.type=ut.Identifier,this.name=e,this.finish(),this},finishIfStatement:function(e,u,t){return this.type=ut.IfStatement,this.test=e,this.consequent=u,this.alternate=t,this.finish(),this},finishLabeledStatement:function(e,u){return this.type=ut.LabeledStatement,this.label=e,this.body=u,this.finish(),this},finishLiteral:function(e){return this.type=ut.Literal,this.value=e.value,this.raw=rt.slice(e.start,e.end),e.regex&&(this.regex=e.regex),this.finish(),this},finishMemberExpression:function(e,u,t){return this.type=ut.MemberExpression,this.computed="["===e,this.object=u,this.property=t,this.finish(),this},finishMetaProperty:function(e,u){return this.type=ut.MetaProperty,this.meta=e,this.property=u,this.finish(),this},finishNewExpression:function(e,u){return this.type=ut.NewExpression,this.callee=e,this.arguments=u,this.finish(),this},finishObjectExpression:function(e){return this.type=ut.ObjectExpression,this.properties=e,this.finish(),this},finishObjectPattern:function(e){return this.type=ut.ObjectPattern,this.properties=e,this.finish(),this},finishPostfixExpression:function(e,u){return this.type=ut.UpdateExpression,this.operator=e,this.argument=u,this.prefix=!1,this.finish(),this},finishProgram:function(e,u){return this.type=ut.Program,this.body=e,this.sourceType=u,this.finish(),this},finishProperty:function(e,u,t,n,i,r){return this.type=ut.Property,this.key=u,this.computed=t,this.value=n,this.kind=e,this.method=i,this.shorthand=r,this.finish(),this},finishRestElement:function(e){return this.type=ut.RestElement,this.argument=e,this.finish(),this},finishReturnStatement:function(e){return this.type=ut.ReturnStatement,this.argument=e,this.finish(),this},finishSequenceExpression:function(e){return this.type=ut.SequenceExpression,this.expressions=e,this.finish(),this},finishSpreadElement:function(e){return this.type=ut.SpreadElement,this.argument=e,this.finish(),this},finishSwitchCase:function(e,u){return this.type=ut.SwitchCase,this.test=e,this.consequent=u,this.finish(),this},finishSuper:function(){return this.type=ut.Super,this.finish(),this},finishSwitchStatement:function(e,u){return this.type=ut.SwitchStatement,this.discriminant=e,this.cases=u,this.finish(),this},finishTaggedTemplateExpression:function(e,u){return this.type=ut.TaggedTemplateExpression,this.tag=e,this.quasi=u,this.finish(),this},finishTemplateElement:function(e,u){return this.type=ut.TemplateElement,this.value=e,this.tail=u,this.finish(),this},finishTemplateLiteral:function(e,u){return this.type=ut.TemplateLiteral,this.quasis=e,this.expressions=u,this.finish(),this},finishThisExpression:function(){return this.type=ut.ThisExpression,this.finish(),this},finishThrowStatement:function(e){return this.type=ut.ThrowStatement,this.argument=e,this.finish(),this},finishTryStatement:function(e,u,t){return this.type=ut.TryStatement,this.block=e,this.guardedHandlers=[],this.handlers=u?[u]:[],this.handler=u,this.finalizer=t,this.finish(),this},finishUnaryExpression:function(e,u){return this.type="++"===e||"--"===e?ut.UpdateExpression:ut.UnaryExpression,this.operator=e,this.argument=u,this.prefix=!0,this.finish(),this},finishVariableDeclaration:function(e){return this.type=ut.VariableDeclaration,this.declarations=e,this.kind="var",this.finish(),this},finishLexicalDeclaration:function(e,u){return this.type=ut.VariableDeclaration,this.declarations=e,this.kind=u,this.finish(),this},finishVariableDeclarator:function(e,u){return this.type=ut.VariableDeclarator,this.id=e,this.init=u,this.finish(),this},finishWhileStatement:function(e,u){return this.type=ut.WhileStatement,this.test=e,this.body=u,this.finish(),this},finishWithStatement:function(e,u){return this.type=ut.WithStatement,this.object=e,this.body=u,this.finish(),this},finishExportSpecifier:function(e,u){return this.type=ut.ExportSpecifier,this.exported=u||e,this.local=e,this.finish(),this},finishImportDefaultSpecifier:function(e){return this.type=ut.ImportDefaultSpecifier,this.local=e,this.finish(),this},finishImportNamespaceSpecifier:function(e){return this.type=ut.ImportNamespaceSpecifier,this.local=e,this.finish(),this},finishExportNamedDeclaration:function(e,u,t){return this.type=ut.ExportNamedDeclaration,this.declaration=e,this.specifiers=u,this.source=t,this.finish(),this},finishExportDefaultDeclaration:function(e){return this.type=ut.ExportDefaultDeclaration,this.declaration=e,this.finish(),this},finishExportAllDeclaration:function(e){return this.type=ut.ExportAllDeclaration,this.source=e,this.finish(),this},finishImportSpecifier:function(e,u){return this.type=ut.ImportSpecifier,this.local=e||u,this.imported=u,this.finish(),this},finishImportDeclaration:function(e,u){return this.type=ut.ImportDeclaration,this.specifiers=e,this.source=u,this.finish(),this},finishYieldExpression:function(e,u){return this.type=ut.YieldExpression,this.argument=e,this.delegate=u,this.finish(),this}},e.version="2.7.1",e.tokenize=Xu,e.parse=Ju,e.Syntax=function(){var e,u={};"function"==typeof Object.create&&(u=Object.create(null));for(e in ut)ut.hasOwnProperty(e)&&(u[e]=ut[e]);return"function"==typeof Object.freeze&&Object.freeze(u),u}()});
 
 },{}],26:[function(require,module,exports){
-var hasOwn=Object.prototype.hasOwnProperty,toString=Object.prototype.toString;module.exports=function(t,r,o){if("[object Function]"!==toString.call(r))throw new TypeError("iterator must be a function");var e=t.length;if(e===+e)for(var n=0;e>n;n++)r.call(o,t[n],n,t);else for(var a in t)hasOwn.call(t,a)&&r.call(o,t[a],a,t)};
+function EventEmitter(){this._events=this._events||{},this._maxListeners=this._maxListeners||void 0}function isFunction(e){return"function"==typeof e}function isNumber(e){return"number"==typeof e}function isObject(e){return"object"==typeof e&&null!==e}function isUndefined(e){return void 0===e}module.exports=EventEmitter,EventEmitter.EventEmitter=EventEmitter,EventEmitter.prototype._events=void 0,EventEmitter.prototype._maxListeners=void 0,EventEmitter.defaultMaxListeners=10,EventEmitter.prototype.setMaxListeners=function(e){if(!isNumber(e)||0>e||isNaN(e))throw TypeError("n must be a positive number");return this._maxListeners=e,this},EventEmitter.prototype.emit=function(e){var t,n,i,s,r,o;if(this._events||(this._events={}),"error"===e&&(!this._events.error||isObject(this._events.error)&&!this._events.error.length)){if(t=arguments[1],t instanceof Error)throw t;throw TypeError('Uncaught, unspecified "error" event.')}if(n=this._events[e],isUndefined(n))return!1;if(isFunction(n))switch(arguments.length){case 1:n.call(this);break;case 2:n.call(this,arguments[1]);break;case 3:n.call(this,arguments[1],arguments[2]);break;default:s=Array.prototype.slice.call(arguments,1),n.apply(this,s)}else if(isObject(n))for(s=Array.prototype.slice.call(arguments,1),o=n.slice(),i=o.length,r=0;i>r;r++)o[r].apply(this,s);return!0},EventEmitter.prototype.addListener=function(e,t){var n;if(!isFunction(t))throw TypeError("listener must be a function");return this._events||(this._events={}),this._events.newListener&&this.emit("newListener",e,isFunction(t.listener)?t.listener:t),this._events[e]?isObject(this._events[e])?this._events[e].push(t):this._events[e]=[this._events[e],t]:this._events[e]=t,isObject(this._events[e])&&!this._events[e].warned&&(n=isUndefined(this._maxListeners)?EventEmitter.defaultMaxListeners:this._maxListeners,n&&n>0&&this._events[e].length>n&&(this._events[e].warned=!0,console.error("(node) warning: possible EventEmitter memory leak detected. %d listeners added. Use emitter.setMaxListeners() to increase limit.",this._events[e].length),"function"==typeof console.trace&&console.trace())),this},EventEmitter.prototype.on=EventEmitter.prototype.addListener,EventEmitter.prototype.once=function(e,t){function n(){this.removeListener(e,n),i||(i=!0,t.apply(this,arguments))}if(!isFunction(t))throw TypeError("listener must be a function");var i=!1;return n.listener=t,this.on(e,n),this},EventEmitter.prototype.removeListener=function(e,t){var n,i,s,r;if(!isFunction(t))throw TypeError("listener must be a function");if(!this._events||!this._events[e])return this;if(n=this._events[e],s=n.length,i=-1,n===t||isFunction(n.listener)&&n.listener===t)delete this._events[e],this._events.removeListener&&this.emit("removeListener",e,t);else if(isObject(n)){for(r=s;r-- >0;)if(n[r]===t||n[r].listener&&n[r].listener===t){i=r;break}if(0>i)return this;1===n.length?(n.length=0,delete this._events[e]):n.splice(i,1),this._events.removeListener&&this.emit("removeListener",e,t)}return this},EventEmitter.prototype.removeAllListeners=function(e){var t,n;if(!this._events)return this;if(!this._events.removeListener)return 0===arguments.length?this._events={}:this._events[e]&&delete this._events[e],this;if(0===arguments.length){for(t in this._events)"removeListener"!==t&&this.removeAllListeners(t);return this.removeAllListeners("removeListener"),this._events={},this}if(n=this._events[e],isFunction(n))this.removeListener(e,n);else if(n)for(;n.length;)this.removeListener(e,n[n.length-1]);return delete this._events[e],this},EventEmitter.prototype.listeners=function(e){var t;return t=this._events&&this._events[e]?isFunction(this._events[e])?[this._events[e]]:this._events[e].slice():[]},EventEmitter.prototype.listenerCount=function(e){if(this._events){var t=this._events[e];if(isFunction(t))return 1;if(t)return t.length}return 0},EventEmitter.listenerCount=function(e,t){return e.listenerCount(t)};
 
 },{}],27:[function(require,module,exports){
 var http=require("http"),https=module.exports;for(var key in http)http.hasOwnProperty(key)&&(https[key]=http[key]);https.request=function(t,e){return t||(t={}),t.scheme="https",t.protocol="https:",http.request.call(this,t,e)};
@@ -126,13 +126,18 @@ var http=require("http"),https=module.exports;for(var key in http)http.hasOwnPro
 exports.read=function(a,o,t,r,h){var M,p,w=8*h-r-1,f=(1<<w)-1,e=f>>1,i=-7,N=t?h-1:0,n=t?-1:1,s=a[o+N];for(N+=n,M=s&(1<<-i)-1,s>>=-i,i+=w;i>0;M=256*M+a[o+N],N+=n,i-=8);for(p=M&(1<<-i)-1,M>>=-i,i+=r;i>0;p=256*p+a[o+N],N+=n,i-=8);if(0===M)M=1-e;else{if(M===f)return p?NaN:(s?-1:1)*(1/0);p+=Math.pow(2,r),M-=e}return(s?-1:1)*p*Math.pow(2,M-r)},exports.write=function(a,o,t,r,h,M){var p,w,f,e=8*M-h-1,i=(1<<e)-1,N=i>>1,n=23===h?Math.pow(2,-24)-Math.pow(2,-77):0,s=r?0:M-1,u=r?1:-1,l=0>o||0===o&&0>1/o?1:0;for(o=Math.abs(o),isNaN(o)||o===1/0?(w=isNaN(o)?1:0,p=i):(p=Math.floor(Math.log(o)/Math.LN2),o*(f=Math.pow(2,-p))<1&&(p--,f*=2),o+=p+N>=1?n/f:n*Math.pow(2,1-N),o*f>=2&&(p++,f/=2),p+N>=i?(w=0,p=i):p+N>=1?(w=(o*f-1)*Math.pow(2,h),p+=N):(w=o*Math.pow(2,N-1)*Math.pow(2,h),p=0));h>=8;a[t+s]=255&w,s+=u,w/=256,h-=8);for(p=p<<h|w,e+=h;e>0;a[t+s]=255&p,s+=u,p/=256,e-=8);a[t+s-u]|=128*l};
 
 },{}],29:[function(require,module,exports){
-var indexOf=[].indexOf;module.exports=function(e,n){if(indexOf)return e.indexOf(n);for(var r=0;r<e.length;++r)if(e[r]===n)return r;return-1};
+/*!
+ * node-inherit
+ * Copyright(c) 2011 Dmitry Filatov <dfilatov@yandex-team.ru>
+ * MIT Licensed
+ */
+module.exports=require("./lib/inherit");
 
-},{}],30:[function(require,module,exports){
-"function"==typeof Object.create?module.exports=function(t,e){t.super_=e,t.prototype=Object.create(e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}})}:module.exports=function(t,e){t.super_=e;var o=function(){};o.prototype=e.prototype,t.prototype=new o,t.prototype.constructor=t};
+},{"./lib/inherit":30}],30:[function(require,module,exports){
+!function(t){function r(t){var r=a(t);if(v)for(var n,o=0;n=g[o++];)t.hasOwnProperty(n)&&r.push(n);return r}function n(t,n,o){for(var e,i,c=r(o),f=0,a=c.length;a>f;)"__self"!==(e=c[f++])&&(i=o[e],l(i)&&(!u||i.toString().indexOf(".__base")>-1)?n[e]=function(r,o){var e=t[r]?t[r]:"__constructor"===r?n.__self.__parent:y;return function(){var t=this.__base;this.__base=e;var r=o.apply(this,arguments);return this.__base=t,r}}(e,i):n[e]=i)}function o(t,r){for(var n,o=1;n=t[o++];)r?l(n)?e.self(r,n.prototype,n):e.self(r,n):r=l(n)?e(t[0],n.prototype,n):e(t[0],n);return r||t[0]}function e(){var t=arguments,r=_(t[0]),e=r||l(t[0]),u=e?r?o(t[0]):t[0]:i,c=t[e?1:0]||{},a=t[e?2:1],s=c.__constructor||e&&u.prototype.__constructor?function(){return this.__constructor.apply(this,arguments)}:e?function(){return u.apply(this,arguments)}:function(){};if(!e)return s.prototype=c,s.prototype.__self=s.prototype.constructor=s,p(s,a);p(s,u),s.__parent=u;var y=u.prototype,v=s.prototype=f(y);return v.__self=v.constructor=s,c&&n(y,v,c),a&&n(u,s,a),s}var u=function(){"_"}.toString().indexOf("_")>-1,i=function(){},c=Object.prototype.hasOwnProperty,f=Object.create||function(t){var r=function(){};return r.prototype=t,new r},a=Object.keys||function(t){var r=[];for(var n in t)c.call(t,n)&&r.push(n);return r},p=function(t,r){for(var n in r)c.call(r,n)&&(t[n]=r[n]);return t},s=Object.prototype.toString,_=Array.isArray||function(t){return"[object Array]"===s.call(t)},l=function(t){return"[object Function]"===s.call(t)},y=function(){},v=!0,h={toString:""};for(var b in h)h.hasOwnProperty(b)&&(v=!1);var g=v?["toString","valueOf"]:null;e.self=function(){var t=arguments,r=_(t[0]),e=r?o(t[0],t[0][0]):t[0],u=t[1],i=t[2],c=e.prototype;return u&&n(c,c,u),i&&n(e,e,i),e};var O=!0;"object"==typeof exports&&(module.exports=e,O=!1),"object"==typeof modules&&(modules.define("inherit",function(t){t(e)}),O=!1),"function"==typeof define&&(define(function(t,r,n){n.exports=e}),O=!1),O&&(t.inherit=e)}(this);
 
 },{}],31:[function(require,module,exports){
-var isArray=Array.isArray,str=Object.prototype.toString;module.exports=isArray||function(r){return!!r&&"[object Array]"==str.call(r)};
+"function"==typeof Object.create?module.exports=function(t,e){t.super_=e,t.prototype=Object.create(e.prototype,{constructor:{value:t,enumerable:!1,writable:!0,configurable:!0}})}:module.exports=function(t,e){t.super_=e;var o=function(){};o.prototype=e.prototype,t.prototype=new o,t.prototype.constructor=t};
 
 },{}],32:[function(require,module,exports){
 module.exports=function(r){return!(null==r||!(r._isBuffer||r.constructor&&"function"==typeof r.constructor.isBuffer&&r.constructor.isBuffer(r)))};
@@ -150,13 +155,13 @@ module.exports=Array.isArray||function(r){return"[object Array]"==Object.prototy
 "use strict";function isNothing(e){return"undefined"==typeof e||null===e}function isObject(e){return"object"==typeof e&&null!==e}function toArray(e){return Array.isArray(e)?e:isNothing(e)?[]:[e]}function extend(e,t){var r,o,n,i;if(t)for(i=Object.keys(t),r=0,o=i.length;o>r;r+=1)n=i[r],e[n]=t[n];return e}function repeat(e,t){var r,o="";for(r=0;t>r;r+=1)o+=e;return o}function isNegativeZero(e){return 0===e&&Number.NEGATIVE_INFINITY===1/e}module.exports.isNothing=isNothing,module.exports.isObject=isObject,module.exports.toArray=toArray,module.exports.repeat=repeat,module.exports.isNegativeZero=isNegativeZero,module.exports.extend=extend;
 
 },{}],37:[function(require,module,exports){
-"use strict";function compileStyleMap(e,t){var n,i,r,E,o,s,c;if(null===t)return{};for(n={},i=Object.keys(t),r=0,E=i.length;E>r;r+=1)o=i[r],s=String(t[o]),"!!"===o.slice(0,2)&&(o="tag:yaml.org,2002:"+o.slice(2)),c=e.compiledTypeMap[o],c&&_hasOwnProperty.call(c.styleAliases,s)&&(s=c.styleAliases[s]),n[o]=s;return n}function encodeHex(e){var t,n,i;if(t=e.toString(16).toUpperCase(),255>=e)n="x",i=2;else if(65535>=e)n="u",i=4;else{if(!(4294967295>=e))throw new YAMLException("code point within a string may not be greater than 0xFFFFFFFF");n="U",i=8}return"\\"+n+common.repeat("0",i-t.length)+t}function State(e){this.schema=e.schema||DEFAULT_FULL_SCHEMA,this.indent=Math.max(1,e.indent||2),this.skipInvalid=e.skipInvalid||!1,this.flowLevel=common.isNothing(e.flowLevel)?-1:e.flowLevel,this.styleMap=compileStyleMap(this.schema,e.styles||null),this.sortKeys=e.sortKeys||!1,this.implicitTypes=this.schema.compiledImplicit,this.explicitTypes=this.schema.compiledExplicit,this.tag=null,this.result="",this.duplicates=[],this.usedDuplicates=null}function indentString(e,t){for(var n,i=common.repeat(" ",t),r=0,E=-1,o="",s=e.length;s>r;)E=e.indexOf("\n",r),-1===E?(n=e.slice(r),r=s):(n=e.slice(r,E+1),r=E+1),n.length&&"\n"!==n&&(o+=i),o+=n;return o}function generateNextLine(e,t){return"\n"+common.repeat(" ",e.indent*t)}function testImplicitResolving(e,t){var n,i,r;for(n=0,i=e.implicitTypes.length;i>n;n+=1)if(r=e.implicitTypes[n],r.resolve(t))return!0;return!1}function StringBuilder(e){this.source=e,this.result="",this.checkpoint=0}function writeScalar(e,t,n,i){var r,E,o,s,c,p,l,u,A,a,C,_,d,f,S,h,R,m,g,N,H;if(0===t.length)return void(e.dump="''");if(-1!==DEPRECATED_BOOLEANS_SYNTAX.indexOf(t))return void(e.dump="'"+t+"'");for(r=!0,E=t.length?t.charCodeAt(0):0,o=CHAR_SPACE===E||CHAR_SPACE===t.charCodeAt(t.length-1),(CHAR_MINUS===E||CHAR_QUESTION===E||CHAR_COMMERCIAL_AT===E||CHAR_GRAVE_ACCENT===E)&&(r=!1),o?(r=!1,s=!1,c=!1):(s=!i,c=!i),p=!0,l=new StringBuilder(t),u=!1,A=0,a=0,C=e.indent*n,_=80,40>C?_-=C:_=40,f=0;f<t.length;f++){if(d=t.charCodeAt(f),r){if(simpleChar(d))continue;r=!1}p&&d===CHAR_SINGLE_QUOTE&&(p=!1),S=ESCAPE_SEQUENCES[d],h=needsHexEscape(d),(S||h)&&(d!==CHAR_LINE_FEED&&d!==CHAR_DOUBLE_QUOTE&&d!==CHAR_SINGLE_QUOTE?(s=!1,c=!1):d===CHAR_LINE_FEED&&(u=!0,p=!1,f>0&&(R=t.charCodeAt(f-1),R===CHAR_SPACE&&(c=!1,s=!1)),s&&(m=f-A,A=f,m>a&&(a=m))),d!==CHAR_DOUBLE_QUOTE&&(p=!1),l.takeUpTo(f),l.escapeChar())}if(r&&testImplicitResolving(e,t)&&(r=!1),g="",(s||c)&&(N=0,t.charCodeAt(t.length-1)===CHAR_LINE_FEED&&(N+=1,t.charCodeAt(t.length-2)===CHAR_LINE_FEED&&(N+=1)),0===N?g="-":2===N&&(g="+")),c&&_>a&&(s=!1),u||(c=!1),r)e.dump=t;else if(p)e.dump="'"+t+"'";else if(s)H=fold(t,_),e.dump=">"+g+"\n"+indentString(H,C);else if(c)g||(t=t.replace(/\n$/,"")),e.dump="|"+g+"\n"+indentString(t,C);else{if(!l)throw new Error("Failed to dump scalar value");l.finish(),e.dump='"'+l.result+'"'}}function fold(e,t){var n,i="",r=0,E=e.length,o=/\n+$/.exec(e);for(o&&(E=o.index+1);E>r;)n=e.indexOf("\n",r),n>E||-1===n?(i&&(i+="\n\n"),i+=foldLine(e.slice(r,E),t),r=E):(i&&(i+="\n\n"),i+=foldLine(e.slice(r,n),t),r=n+1);return o&&"\n"!==o[0]&&(i+=o[0]),i}function foldLine(e,t){if(""===e)return e;for(var n,i,r,E=/[^\s] [^\s]/g,o="",s=0,c=0,p=E.exec(e);p;)n=p.index,n-c>t&&(i=s!==c?s:n,o&&(o+="\n"),r=e.slice(c,i),o+=r,c=i+1),s=n+1,p=E.exec(e);return o&&(o+="\n"),o+=c!==s&&e.length-c>t?e.slice(c,s)+"\n"+e.slice(s+1):e.slice(c)}function simpleChar(e){return CHAR_TAB!==e&&CHAR_LINE_FEED!==e&&CHAR_CARRIAGE_RETURN!==e&&CHAR_COMMA!==e&&CHAR_LEFT_SQUARE_BRACKET!==e&&CHAR_RIGHT_SQUARE_BRACKET!==e&&CHAR_LEFT_CURLY_BRACKET!==e&&CHAR_RIGHT_CURLY_BRACKET!==e&&CHAR_SHARP!==e&&CHAR_AMPERSAND!==e&&CHAR_ASTERISK!==e&&CHAR_EXCLAMATION!==e&&CHAR_VERTICAL_LINE!==e&&CHAR_GREATER_THAN!==e&&CHAR_SINGLE_QUOTE!==e&&CHAR_DOUBLE_QUOTE!==e&&CHAR_PERCENT!==e&&CHAR_COLON!==e&&!ESCAPE_SEQUENCES[e]&&!needsHexEscape(e)}function needsHexEscape(e){return!(e>=32&&126>=e||133===e||e>=160&&55295>=e||e>=57344&&65533>=e||e>=65536&&1114111>=e)}function writeFlowSequence(e,t,n){var i,r,E="",o=e.tag;for(i=0,r=n.length;r>i;i+=1)writeNode(e,t,n[i],!1,!1)&&(0!==i&&(E+=", "),E+=e.dump);e.tag=o,e.dump="["+E+"]"}function writeBlockSequence(e,t,n,i){var r,E,o="",s=e.tag;for(r=0,E=n.length;E>r;r+=1)writeNode(e,t+1,n[r],!0,!0)&&(i&&0===r||(o+=generateNextLine(e,t)),o+="- "+e.dump);e.tag=s,e.dump=o||"[]"}function writeFlowMapping(e,t,n){var i,r,E,o,s,c="",p=e.tag,l=Object.keys(n);for(i=0,r=l.length;r>i;i+=1)s="",0!==i&&(s+=", "),E=l[i],o=n[E],writeNode(e,t,E,!1,!1)&&(e.dump.length>1024&&(s+="? "),s+=e.dump+": ",writeNode(e,t,o,!1,!1)&&(s+=e.dump,c+=s));e.tag=p,e.dump="{"+c+"}"}function writeBlockMapping(e,t,n,i){var r,E,o,s,c,p,l="",u=e.tag,A=Object.keys(n);if(e.sortKeys===!0)A.sort();else if("function"==typeof e.sortKeys)A.sort(e.sortKeys);else if(e.sortKeys)throw new YAMLException("sortKeys must be a boolean or a function");for(r=0,E=A.length;E>r;r+=1)p="",i&&0===r||(p+=generateNextLine(e,t)),o=A[r],s=n[o],writeNode(e,t+1,o,!0,!0,!0)&&(c=null!==e.tag&&"?"!==e.tag||e.dump&&e.dump.length>1024,c&&(p+=e.dump&&CHAR_LINE_FEED===e.dump.charCodeAt(0)?"?":"? "),p+=e.dump,c&&(p+=generateNextLine(e,t)),writeNode(e,t+1,s,!0,c)&&(p+=e.dump&&CHAR_LINE_FEED===e.dump.charCodeAt(0)?":":": ",p+=e.dump,l+=p));e.tag=u,e.dump=l||"{}"}function detectType(e,t,n){var i,r,E,o,s,c;for(r=n?e.explicitTypes:e.implicitTypes,E=0,o=r.length;o>E;E+=1)if(s=r[E],(s.instanceOf||s.predicate)&&(!s.instanceOf||"object"==typeof t&&t instanceof s.instanceOf)&&(!s.predicate||s.predicate(t))){if(e.tag=n?s.tag:"?",s.represent){if(c=e.styleMap[s.tag]||s.defaultStyle,"[object Function]"===_toString.call(s.represent))i=s.represent(t,c);else{if(!_hasOwnProperty.call(s.represent,c))throw new YAMLException("!<"+s.tag+'> tag resolver accepts not "'+c+'" style');i=s.represent[c](t,c)}e.dump=i}return!0}return!1}function writeNode(e,t,n,i,r,E){e.tag=null,e.dump=n,detectType(e,n,!1)||detectType(e,n,!0);var o=_toString.call(e.dump);i&&(i=0>e.flowLevel||e.flowLevel>t);var s,c,p="[object Object]"===o||"[object Array]"===o;if(p&&(s=e.duplicates.indexOf(n),c=-1!==s),(null!==e.tag&&"?"!==e.tag||c||2!==e.indent&&t>0)&&(r=!1),c&&e.usedDuplicates[s])e.dump="*ref_"+s;else{if(p&&c&&!e.usedDuplicates[s]&&(e.usedDuplicates[s]=!0),"[object Object]"===o)i&&0!==Object.keys(e.dump).length?(writeBlockMapping(e,t,e.dump,r),c&&(e.dump="&ref_"+s+e.dump)):(writeFlowMapping(e,t,e.dump),c&&(e.dump="&ref_"+s+" "+e.dump));else if("[object Array]"===o)i&&0!==e.dump.length?(writeBlockSequence(e,t,e.dump,r),c&&(e.dump="&ref_"+s+e.dump)):(writeFlowSequence(e,t,e.dump),c&&(e.dump="&ref_"+s+" "+e.dump));else{if("[object String]"!==o){if(e.skipInvalid)return!1;throw new YAMLException("unacceptable kind of an object to dump "+o)}"?"!==e.tag&&writeScalar(e,e.dump,t,E)}null!==e.tag&&"?"!==e.tag&&(e.dump="!<"+e.tag+"> "+e.dump)}return!0}function getDuplicateReferences(e,t){var n,i,r=[],E=[];for(inspectNode(e,r,E),n=0,i=E.length;i>n;n+=1)t.duplicates.push(r[E[n]]);t.usedDuplicates=new Array(i)}function inspectNode(e,t,n){var i,r,E;if(null!==e&&"object"==typeof e)if(r=t.indexOf(e),-1!==r)-1===n.indexOf(r)&&n.push(r);else if(t.push(e),Array.isArray(e))for(r=0,E=e.length;E>r;r+=1)inspectNode(e[r],t,n);else for(i=Object.keys(e),r=0,E=i.length;E>r;r+=1)inspectNode(e[i[r]],t,n)}function dump(e,t){t=t||{};var n=new State(t);return getDuplicateReferences(e,n),writeNode(n,0,e,!0,!0)?n.dump+"\n":""}function safeDump(e,t){return dump(e,common.extend({schema:DEFAULT_SAFE_SCHEMA},t))}var common=require("./common"),YAMLException=require("./exception"),DEFAULT_FULL_SCHEMA=require("./schema/default_full"),DEFAULT_SAFE_SCHEMA=require("./schema/default_safe"),_toString=Object.prototype.toString,_hasOwnProperty=Object.prototype.hasOwnProperty,CHAR_TAB=9,CHAR_LINE_FEED=10,CHAR_CARRIAGE_RETURN=13,CHAR_SPACE=32,CHAR_EXCLAMATION=33,CHAR_DOUBLE_QUOTE=34,CHAR_SHARP=35,CHAR_PERCENT=37,CHAR_AMPERSAND=38,CHAR_SINGLE_QUOTE=39,CHAR_ASTERISK=42,CHAR_COMMA=44,CHAR_MINUS=45,CHAR_COLON=58,CHAR_GREATER_THAN=62,CHAR_QUESTION=63,CHAR_COMMERCIAL_AT=64,CHAR_LEFT_SQUARE_BRACKET=91,CHAR_RIGHT_SQUARE_BRACKET=93,CHAR_GRAVE_ACCENT=96,CHAR_LEFT_CURLY_BRACKET=123,CHAR_VERTICAL_LINE=124,CHAR_RIGHT_CURLY_BRACKET=125,ESCAPE_SEQUENCES={};ESCAPE_SEQUENCES[0]="\\0",ESCAPE_SEQUENCES[7]="\\a",ESCAPE_SEQUENCES[8]="\\b",ESCAPE_SEQUENCES[9]="\\t",ESCAPE_SEQUENCES[10]="\\n",ESCAPE_SEQUENCES[11]="\\v",ESCAPE_SEQUENCES[12]="\\f",ESCAPE_SEQUENCES[13]="\\r",ESCAPE_SEQUENCES[27]="\\e",ESCAPE_SEQUENCES[34]='\\"',ESCAPE_SEQUENCES[92]="\\\\",ESCAPE_SEQUENCES[133]="\\N",ESCAPE_SEQUENCES[160]="\\_",ESCAPE_SEQUENCES[8232]="\\L",ESCAPE_SEQUENCES[8233]="\\P";var DEPRECATED_BOOLEANS_SYNTAX=["y","Y","yes","Yes","YES","on","On","ON","n","N","no","No","NO","off","Off","OFF"];StringBuilder.prototype.takeUpTo=function(e){var t;if(e<this.checkpoint)throw t=new Error("position should be > checkpoint"),t.position=e,t.checkpoint=this.checkpoint,t;return this.result+=this.source.slice(this.checkpoint,e),this.checkpoint=e,this},StringBuilder.prototype.escapeChar=function(){var e,t;return e=this.source.charCodeAt(this.checkpoint),t=ESCAPE_SEQUENCES[e]||encodeHex(e),this.result+=t,this.checkpoint+=1,this},StringBuilder.prototype.finish=function(){this.source.length>this.checkpoint&&this.takeUpTo(this.source.length)},module.exports.dump=dump,module.exports.safeDump=safeDump;
+"use strict";function compileStyleMap(e,t){var n,i,r,E,o,s,c;if(null===t)return{};for(n={},i=Object.keys(t),r=0,E=i.length;E>r;r+=1)o=i[r],s=String(t[o]),"!!"===o.slice(0,2)&&(o="tag:yaml.org,2002:"+o.slice(2)),c=e.compiledTypeMap[o],c&&_hasOwnProperty.call(c.styleAliases,s)&&(s=c.styleAliases[s]),n[o]=s;return n}function encodeHex(e){var t,n,i;if(t=e.toString(16).toUpperCase(),255>=e)n="x",i=2;else if(65535>=e)n="u",i=4;else{if(!(4294967295>=e))throw new YAMLException("code point within a string may not be greater than 0xFFFFFFFF");n="U",i=8}return"\\"+n+common.repeat("0",i-t.length)+t}function State(e){this.schema=e.schema||DEFAULT_FULL_SCHEMA,this.indent=Math.max(1,e.indent||2),this.skipInvalid=e.skipInvalid||!1,this.flowLevel=common.isNothing(e.flowLevel)?-1:e.flowLevel,this.styleMap=compileStyleMap(this.schema,e.styles||null),this.sortKeys=e.sortKeys||!1,this.lineWidth=e.lineWidth||80,this.implicitTypes=this.schema.compiledImplicit,this.explicitTypes=this.schema.compiledExplicit,this.tag=null,this.result="",this.duplicates=[],this.usedDuplicates=null}function indentString(e,t){for(var n,i=common.repeat(" ",t),r=0,E=-1,o="",s=e.length;s>r;)E=e.indexOf("\n",r),-1===E?(n=e.slice(r),r=s):(n=e.slice(r,E+1),r=E+1),n.length&&"\n"!==n&&(o+=i),o+=n;return o}function generateNextLine(e,t){return"\n"+common.repeat(" ",e.indent*t)}function testImplicitResolving(e,t){var n,i,r;for(n=0,i=e.implicitTypes.length;i>n;n+=1)if(r=e.implicitTypes[n],r.resolve(t))return!0;return!1}function StringBuilder(e){this.source=e,this.result="",this.checkpoint=0}function writeScalar(e,t,n,i){var r,E,o,s,c,p,l,u,A,a,C,_,d,f,S,h,R,m,g,N,H;if(0===t.length)return void(e.dump="''");if(-1!==DEPRECATED_BOOLEANS_SYNTAX.indexOf(t))return void(e.dump="'"+t+"'");for(r=!0,E=t.length?t.charCodeAt(0):0,o=CHAR_SPACE===E||CHAR_SPACE===t.charCodeAt(t.length-1),(CHAR_MINUS===E||CHAR_QUESTION===E||CHAR_COMMERCIAL_AT===E||CHAR_GRAVE_ACCENT===E)&&(r=!1),o?(r=!1,s=!1,c=!1):(s=!i,c=!i),p=!0,l=new StringBuilder(t),u=!1,A=0,a=0,C=e.indent*n,_=e.lineWidth,-1===_&&(_=9007199254740991),40>C?_-=C:_=40,f=0;f<t.length;f++){if(d=t.charCodeAt(f),r){if(simpleChar(d))continue;r=!1}p&&d===CHAR_SINGLE_QUOTE&&(p=!1),S=ESCAPE_SEQUENCES[d],h=needsHexEscape(d),(S||h)&&(d!==CHAR_LINE_FEED&&d!==CHAR_DOUBLE_QUOTE&&d!==CHAR_SINGLE_QUOTE?(s=!1,c=!1):d===CHAR_LINE_FEED&&(u=!0,p=!1,f>0&&(R=t.charCodeAt(f-1),R===CHAR_SPACE&&(c=!1,s=!1)),s&&(m=f-A,A=f,m>a&&(a=m))),d!==CHAR_DOUBLE_QUOTE&&(p=!1),l.takeUpTo(f),l.escapeChar())}if(r&&testImplicitResolving(e,t)&&(r=!1),g="",(s||c)&&(N=0,t.charCodeAt(t.length-1)===CHAR_LINE_FEED&&(N+=1,t.charCodeAt(t.length-2)===CHAR_LINE_FEED&&(N+=1)),0===N?g="-":2===N&&(g="+")),c&&_>a&&(s=!1),u||(c=!1),r)e.dump=t;else if(p)e.dump="'"+t+"'";else if(s)H=fold(t,_),e.dump=">"+g+"\n"+indentString(H,C);else if(c)g||(t=t.replace(/\n$/,"")),e.dump="|"+g+"\n"+indentString(t,C);else{if(!l)throw new Error("Failed to dump scalar value");l.finish(),e.dump='"'+l.result+'"'}}function fold(e,t){var n,i="",r=0,E=e.length,o=/\n+$/.exec(e);for(o&&(E=o.index+1);E>r;)n=e.indexOf("\n",r),n>E||-1===n?(i&&(i+="\n\n"),i+=foldLine(e.slice(r,E),t),r=E):(i&&(i+="\n\n"),i+=foldLine(e.slice(r,n),t),r=n+1);return o&&"\n"!==o[0]&&(i+=o[0]),i}function foldLine(e,t){if(""===e)return e;for(var n,i,r,E=/[^\s] [^\s]/g,o="",s=0,c=0,p=E.exec(e);p;)n=p.index,n-c>t&&(i=s!==c?s:n,o&&(o+="\n"),r=e.slice(c,i),o+=r,c=i+1),s=n+1,p=E.exec(e);return o&&(o+="\n"),o+=c!==s&&e.length-c>t?e.slice(c,s)+"\n"+e.slice(s+1):e.slice(c)}function simpleChar(e){return CHAR_TAB!==e&&CHAR_LINE_FEED!==e&&CHAR_CARRIAGE_RETURN!==e&&CHAR_COMMA!==e&&CHAR_LEFT_SQUARE_BRACKET!==e&&CHAR_RIGHT_SQUARE_BRACKET!==e&&CHAR_LEFT_CURLY_BRACKET!==e&&CHAR_RIGHT_CURLY_BRACKET!==e&&CHAR_SHARP!==e&&CHAR_AMPERSAND!==e&&CHAR_ASTERISK!==e&&CHAR_EXCLAMATION!==e&&CHAR_VERTICAL_LINE!==e&&CHAR_GREATER_THAN!==e&&CHAR_SINGLE_QUOTE!==e&&CHAR_DOUBLE_QUOTE!==e&&CHAR_PERCENT!==e&&CHAR_COLON!==e&&!ESCAPE_SEQUENCES[e]&&!needsHexEscape(e)}function needsHexEscape(e){return!(e>=32&&126>=e||133===e||e>=160&&55295>=e||e>=57344&&65533>=e||e>=65536&&1114111>=e)}function writeFlowSequence(e,t,n){var i,r,E="",o=e.tag;for(i=0,r=n.length;r>i;i+=1)writeNode(e,t,n[i],!1,!1)&&(0!==i&&(E+=", "),E+=e.dump);e.tag=o,e.dump="["+E+"]"}function writeBlockSequence(e,t,n,i){var r,E,o="",s=e.tag;for(r=0,E=n.length;E>r;r+=1)writeNode(e,t+1,n[r],!0,!0)&&(i&&0===r||(o+=generateNextLine(e,t)),o+="- "+e.dump);e.tag=s,e.dump=o||"[]"}function writeFlowMapping(e,t,n){var i,r,E,o,s,c="",p=e.tag,l=Object.keys(n);for(i=0,r=l.length;r>i;i+=1)s="",0!==i&&(s+=", "),E=l[i],o=n[E],writeNode(e,t,E,!1,!1)&&(e.dump.length>1024&&(s+="? "),s+=e.dump+": ",writeNode(e,t,o,!1,!1)&&(s+=e.dump,c+=s));e.tag=p,e.dump="{"+c+"}"}function writeBlockMapping(e,t,n,i){var r,E,o,s,c,p,l="",u=e.tag,A=Object.keys(n);if(e.sortKeys===!0)A.sort();else if("function"==typeof e.sortKeys)A.sort(e.sortKeys);else if(e.sortKeys)throw new YAMLException("sortKeys must be a boolean or a function");for(r=0,E=A.length;E>r;r+=1)p="",i&&0===r||(p+=generateNextLine(e,t)),o=A[r],s=n[o],writeNode(e,t+1,o,!0,!0,!0)&&(c=null!==e.tag&&"?"!==e.tag||e.dump&&e.dump.length>1024,c&&(p+=e.dump&&CHAR_LINE_FEED===e.dump.charCodeAt(0)?"?":"? "),p+=e.dump,c&&(p+=generateNextLine(e,t)),writeNode(e,t+1,s,!0,c)&&(p+=e.dump&&CHAR_LINE_FEED===e.dump.charCodeAt(0)?":":": ",p+=e.dump,l+=p));e.tag=u,e.dump=l||"{}"}function detectType(e,t,n){var i,r,E,o,s,c;for(r=n?e.explicitTypes:e.implicitTypes,E=0,o=r.length;o>E;E+=1)if(s=r[E],(s.instanceOf||s.predicate)&&(!s.instanceOf||"object"==typeof t&&t instanceof s.instanceOf)&&(!s.predicate||s.predicate(t))){if(e.tag=n?s.tag:"?",s.represent){if(c=e.styleMap[s.tag]||s.defaultStyle,"[object Function]"===_toString.call(s.represent))i=s.represent(t,c);else{if(!_hasOwnProperty.call(s.represent,c))throw new YAMLException("!<"+s.tag+'> tag resolver accepts not "'+c+'" style');i=s.represent[c](t,c)}e.dump=i}return!0}return!1}function writeNode(e,t,n,i,r,E){e.tag=null,e.dump=n,detectType(e,n,!1)||detectType(e,n,!0);var o=_toString.call(e.dump);i&&(i=0>e.flowLevel||e.flowLevel>t);var s,c,p="[object Object]"===o||"[object Array]"===o;if(p&&(s=e.duplicates.indexOf(n),c=-1!==s),(null!==e.tag&&"?"!==e.tag||c||2!==e.indent&&t>0)&&(r=!1),c&&e.usedDuplicates[s])e.dump="*ref_"+s;else{if(p&&c&&!e.usedDuplicates[s]&&(e.usedDuplicates[s]=!0),"[object Object]"===o)i&&0!==Object.keys(e.dump).length?(writeBlockMapping(e,t,e.dump,r),c&&(e.dump="&ref_"+s+e.dump)):(writeFlowMapping(e,t,e.dump),c&&(e.dump="&ref_"+s+" "+e.dump));else if("[object Array]"===o)i&&0!==e.dump.length?(writeBlockSequence(e,t,e.dump,r),c&&(e.dump="&ref_"+s+e.dump)):(writeFlowSequence(e,t,e.dump),c&&(e.dump="&ref_"+s+" "+e.dump));else{if("[object String]"!==o){if(e.skipInvalid)return!1;throw new YAMLException("unacceptable kind of an object to dump "+o)}"?"!==e.tag&&writeScalar(e,e.dump,t,E)}null!==e.tag&&"?"!==e.tag&&(e.dump="!<"+e.tag+"> "+e.dump)}return!0}function getDuplicateReferences(e,t){var n,i,r=[],E=[];for(inspectNode(e,r,E),n=0,i=E.length;i>n;n+=1)t.duplicates.push(r[E[n]]);t.usedDuplicates=new Array(i)}function inspectNode(e,t,n){var i,r,E;if(null!==e&&"object"==typeof e)if(r=t.indexOf(e),-1!==r)-1===n.indexOf(r)&&n.push(r);else if(t.push(e),Array.isArray(e))for(r=0,E=e.length;E>r;r+=1)inspectNode(e[r],t,n);else for(i=Object.keys(e),r=0,E=i.length;E>r;r+=1)inspectNode(e[i[r]],t,n)}function dump(e,t){t=t||{};var n=new State(t);return getDuplicateReferences(e,n),writeNode(n,0,e,!0,!0)?n.dump+"\n":""}function safeDump(e,t){return dump(e,common.extend({schema:DEFAULT_SAFE_SCHEMA},t))}var common=require("./common"),YAMLException=require("./exception"),DEFAULT_FULL_SCHEMA=require("./schema/default_full"),DEFAULT_SAFE_SCHEMA=require("./schema/default_safe"),_toString=Object.prototype.toString,_hasOwnProperty=Object.prototype.hasOwnProperty,CHAR_TAB=9,CHAR_LINE_FEED=10,CHAR_CARRIAGE_RETURN=13,CHAR_SPACE=32,CHAR_EXCLAMATION=33,CHAR_DOUBLE_QUOTE=34,CHAR_SHARP=35,CHAR_PERCENT=37,CHAR_AMPERSAND=38,CHAR_SINGLE_QUOTE=39,CHAR_ASTERISK=42,CHAR_COMMA=44,CHAR_MINUS=45,CHAR_COLON=58,CHAR_GREATER_THAN=62,CHAR_QUESTION=63,CHAR_COMMERCIAL_AT=64,CHAR_LEFT_SQUARE_BRACKET=91,CHAR_RIGHT_SQUARE_BRACKET=93,CHAR_GRAVE_ACCENT=96,CHAR_LEFT_CURLY_BRACKET=123,CHAR_VERTICAL_LINE=124,CHAR_RIGHT_CURLY_BRACKET=125,ESCAPE_SEQUENCES={};ESCAPE_SEQUENCES[0]="\\0",ESCAPE_SEQUENCES[7]="\\a",ESCAPE_SEQUENCES[8]="\\b",ESCAPE_SEQUENCES[9]="\\t",ESCAPE_SEQUENCES[10]="\\n",ESCAPE_SEQUENCES[11]="\\v",ESCAPE_SEQUENCES[12]="\\f",ESCAPE_SEQUENCES[13]="\\r",ESCAPE_SEQUENCES[27]="\\e",ESCAPE_SEQUENCES[34]='\\"',ESCAPE_SEQUENCES[92]="\\\\",ESCAPE_SEQUENCES[133]="\\N",ESCAPE_SEQUENCES[160]="\\_",ESCAPE_SEQUENCES[8232]="\\L",ESCAPE_SEQUENCES[8233]="\\P";var DEPRECATED_BOOLEANS_SYNTAX=["y","Y","yes","Yes","YES","on","On","ON","n","N","no","No","NO","off","Off","OFF"];StringBuilder.prototype.takeUpTo=function(e){var t;if(e<this.checkpoint)throw t=new Error("position should be > checkpoint"),t.position=e,t.checkpoint=this.checkpoint,t;return this.result+=this.source.slice(this.checkpoint,e),this.checkpoint=e,this},StringBuilder.prototype.escapeChar=function(){var e,t;return e=this.source.charCodeAt(this.checkpoint),t=ESCAPE_SEQUENCES[e]||encodeHex(e),this.result+=t,this.checkpoint+=1,this},StringBuilder.prototype.finish=function(){this.source.length>this.checkpoint&&this.takeUpTo(this.source.length)},module.exports.dump=dump,module.exports.safeDump=safeDump;
 
 },{"./common":36,"./exception":38,"./schema/default_full":43,"./schema/default_safe":44}],38:[function(require,module,exports){
-"use strict";function YAMLException(r,t){Error.call(this),Error.captureStackTrace?Error.captureStackTrace(this,this.constructor):this.stack=(new Error).stack||"",this.name="YAMLException",this.reason=r,this.mark=t,this.message=(this.reason||"(unknown reason)")+(this.mark?" "+this.mark.toString():"")}var inherits=require("util").inherits;inherits(YAMLException,Error),YAMLException.prototype.toString=function(r){var t=this.name+": ";return t+=this.reason||"(unknown reason)",!r&&this.mark&&(t+=" "+this.mark.toString()),t},module.exports=YAMLException;
+"use strict";function YAMLException(r,t){Error.call(this),Error.captureStackTrace?Error.captureStackTrace(this,this.constructor):this.stack=(new Error).stack||"",this.name="YAMLException",this.reason=r,this.mark=t,this.message=(this.reason||"(unknown reason)")+(this.mark?" "+this.mark.toString():"")}var inherits=require("inherit");inherits(YAMLException,Error),YAMLException.prototype.toString=function(r){var t=this.name+": ";return t+=this.reason||"(unknown reason)",!r&&this.mark&&(t+=" "+this.mark.toString()),t},module.exports=YAMLException;
 
-},{"util":93}],39:[function(require,module,exports){
-"use strict";function is_EOL(e){return 10===e||13===e}function is_WHITE_SPACE(e){return 9===e||32===e}function is_WS_OR_EOL(e){return 9===e||32===e||10===e||13===e}function is_FLOW_INDICATOR(e){return 44===e||91===e||93===e||123===e||125===e}function fromHexCode(e){var t;return e>=48&&57>=e?e-48:(t=32|e,t>=97&&102>=t?t-97+10:-1)}function escapedHexLen(e){return 120===e?2:117===e?4:85===e?8:0}function fromDecimalCode(e){return e>=48&&57>=e?e-48:-1}function simpleEscapeSequence(e){return 48===e?"\x00":97===e?"":98===e?"\b":116===e?"	":9===e?"	":110===e?"\n":118===e?"":102===e?"\f":114===e?"\r":101===e?"":32===e?" ":34===e?'"':47===e?"/":92===e?"\\":78===e?"…":95===e?" ":76===e?"\u2028":80===e?"\u2029":""}function charFromCodepoint(e){return 65535>=e?String.fromCharCode(e):String.fromCharCode((e-65536>>10)+55296,(e-65536&1023)+56320)}function State(e,t){this.input=e,this.filename=t.filename||null,this.schema=t.schema||DEFAULT_FULL_SCHEMA,this.onWarning=t.onWarning||null,this.legacy=t.legacy||!1,this.implicitTypes=this.schema.compiledImplicit,this.typeMap=this.schema.compiledTypeMap,this.length=e.length,this.position=0,this.line=0,this.lineStart=0,this.lineIndent=0,this.documents=[]}function generateError(e,t){return new YAMLException(t,new Mark(e.filename,e.input,e.position,e.line,e.position-e.lineStart))}function throwError(e,t){throw generateError(e,t)}function throwWarning(e,t){e.onWarning&&e.onWarning.call(null,generateError(e,t))}function captureSegment(e,t,n,i){var o,r,a,p;if(n>t){if(p=e.input.slice(t,n),i)for(o=0,r=p.length;r>o;o+=1)a=p.charCodeAt(o),9===a||a>=32&&1114111>=a||throwError(e,"expected valid JSON character");e.result+=p}}function mergeMappings(e,t,n){var i,o,r,a;for(common.isObject(n)||throwError(e,"cannot merge mappings; the provided source object is unacceptable"),i=Object.keys(n),r=0,a=i.length;a>r;r+=1)o=i[r],_hasOwnProperty.call(t,o)||(t[o]=n[o])}function storeMappingPair(e,t,n,i,o){var r,a;if(i=String(i),null===t&&(t={}),"tag:yaml.org,2002:merge"===n)if(Array.isArray(o))for(r=0,a=o.length;a>r;r+=1)mergeMappings(e,t,o[r]);else mergeMappings(e,t,o);else t[i]=o;return t}function readLineBreak(e){var t;t=e.input.charCodeAt(e.position),10===t?e.position++:13===t?(e.position++,10===e.input.charCodeAt(e.position)&&e.position++):throwError(e,"a line break is expected"),e.line+=1,e.lineStart=e.position}function skipSeparationSpace(e,t,n){for(var i=0,o=e.input.charCodeAt(e.position);0!==o;){for(;is_WHITE_SPACE(o);)o=e.input.charCodeAt(++e.position);if(t&&35===o)do o=e.input.charCodeAt(++e.position);while(10!==o&&13!==o&&0!==o);if(!is_EOL(o))break;for(readLineBreak(e),o=e.input.charCodeAt(e.position),i++,e.lineIndent=0;32===o;)e.lineIndent++,o=e.input.charCodeAt(++e.position)}return-1!==n&&0!==i&&e.lineIndent<n&&throwWarning(e,"deficient indentation"),i}function testDocumentSeparator(e){var t,n=e.position;return t=e.input.charCodeAt(n),45!==t&&46!==t||e.input.charCodeAt(n+1)!==t||e.input.charCodeAt(n+2)!==t||(n+=3,t=e.input.charCodeAt(n),0!==t&&!is_WS_OR_EOL(t))?!1:!0}function writeFoldedLines(e,t){1===t?e.result+=" ":t>1&&(e.result+=common.repeat("\n",t-1))}function readPlainScalar(e,t,n){var i,o,r,a,p,s,c,l,u,d=e.kind,h=e.result;if(u=e.input.charCodeAt(e.position),is_WS_OR_EOL(u)||is_FLOW_INDICATOR(u)||35===u||38===u||42===u||33===u||124===u||62===u||39===u||34===u||37===u||64===u||96===u)return!1;if((63===u||45===u)&&(o=e.input.charCodeAt(e.position+1),is_WS_OR_EOL(o)||n&&is_FLOW_INDICATOR(o)))return!1;for(e.kind="scalar",e.result="",r=a=e.position,p=!1;0!==u;){if(58===u){if(o=e.input.charCodeAt(e.position+1),is_WS_OR_EOL(o)||n&&is_FLOW_INDICATOR(o))break}else if(35===u){if(i=e.input.charCodeAt(e.position-1),is_WS_OR_EOL(i))break}else{if(e.position===e.lineStart&&testDocumentSeparator(e)||n&&is_FLOW_INDICATOR(u))break;if(is_EOL(u)){if(s=e.line,c=e.lineStart,l=e.lineIndent,skipSeparationSpace(e,!1,-1),e.lineIndent>=t){p=!0,u=e.input.charCodeAt(e.position);continue}e.position=a,e.line=s,e.lineStart=c,e.lineIndent=l;break}}p&&(captureSegment(e,r,a,!1),writeFoldedLines(e,e.line-s),r=a=e.position,p=!1),is_WHITE_SPACE(u)||(a=e.position+1),u=e.input.charCodeAt(++e.position)}return captureSegment(e,r,a,!1),e.result?!0:(e.kind=d,e.result=h,!1)}function readSingleQuotedScalar(e,t){var n,i,o;if(n=e.input.charCodeAt(e.position),39!==n)return!1;for(e.kind="scalar",e.result="",e.position++,i=o=e.position;0!==(n=e.input.charCodeAt(e.position));)if(39===n){if(captureSegment(e,i,e.position,!0),n=e.input.charCodeAt(++e.position),39!==n)return!0;i=o=e.position,e.position++}else is_EOL(n)?(captureSegment(e,i,o,!0),writeFoldedLines(e,skipSeparationSpace(e,!1,t)),i=o=e.position):e.position===e.lineStart&&testDocumentSeparator(e)?throwError(e,"unexpected end of the document within a single quoted scalar"):(e.position++,o=e.position);throwError(e,"unexpected end of the stream within a single quoted scalar")}function readDoubleQuotedScalar(e,t){var n,i,o,r,a,p;if(p=e.input.charCodeAt(e.position),34!==p)return!1;for(e.kind="scalar",e.result="",e.position++,n=i=e.position;0!==(p=e.input.charCodeAt(e.position));){if(34===p)return captureSegment(e,n,e.position,!0),e.position++,!0;if(92===p){if(captureSegment(e,n,e.position,!0),p=e.input.charCodeAt(++e.position),is_EOL(p))skipSeparationSpace(e,!1,t);else if(256>p&&simpleEscapeCheck[p])e.result+=simpleEscapeMap[p],e.position++;else if((a=escapedHexLen(p))>0){for(o=a,r=0;o>0;o--)p=e.input.charCodeAt(++e.position),(a=fromHexCode(p))>=0?r=(r<<4)+a:throwError(e,"expected hexadecimal character");e.result+=charFromCodepoint(r),e.position++}else throwError(e,"unknown escape sequence");n=i=e.position}else is_EOL(p)?(captureSegment(e,n,i,!0),writeFoldedLines(e,skipSeparationSpace(e,!1,t)),n=i=e.position):e.position===e.lineStart&&testDocumentSeparator(e)?throwError(e,"unexpected end of the document within a double quoted scalar"):(e.position++,i=e.position)}throwError(e,"unexpected end of the stream within a double quoted scalar")}function readFlowCollection(e,t){var n,i,o,r,a,p,s,c,l,u,d,h=!0,f=e.tag,_=e.anchor;if(d=e.input.charCodeAt(e.position),91===d)r=93,s=!1,i=[];else{if(123!==d)return!1;r=125,s=!0,i={}}for(null!==e.anchor&&(e.anchorMap[e.anchor]=i),d=e.input.charCodeAt(++e.position);0!==d;){if(skipSeparationSpace(e,!0,t),d=e.input.charCodeAt(e.position),d===r)return e.position++,e.tag=f,e.anchor=_,e.kind=s?"mapping":"sequence",e.result=i,!0;h||throwError(e,"missed comma between flow collection entries"),l=c=u=null,a=p=!1,63===d&&(o=e.input.charCodeAt(e.position+1),is_WS_OR_EOL(o)&&(a=p=!0,e.position++,skipSeparationSpace(e,!0,t))),n=e.line,composeNode(e,t,CONTEXT_FLOW_IN,!1,!0),l=e.tag,c=e.result,skipSeparationSpace(e,!0,t),d=e.input.charCodeAt(e.position),!p&&e.line!==n||58!==d||(a=!0,d=e.input.charCodeAt(++e.position),skipSeparationSpace(e,!0,t),composeNode(e,t,CONTEXT_FLOW_IN,!1,!0),u=e.result),s?storeMappingPair(e,i,l,c,u):a?i.push(storeMappingPair(e,null,l,c,u)):i.push(c),skipSeparationSpace(e,!0,t),d=e.input.charCodeAt(e.position),44===d?(h=!0,d=e.input.charCodeAt(++e.position)):h=!1}throwError(e,"unexpected end of the stream within a flow collection")}function readBlockScalar(e,t){var n,i,o,r,a=CHOMPING_CLIP,p=!1,s=t,c=0,l=!1;if(r=e.input.charCodeAt(e.position),124===r)i=!1;else{if(62!==r)return!1;i=!0}for(e.kind="scalar",e.result="";0!==r;)if(r=e.input.charCodeAt(++e.position),43===r||45===r)CHOMPING_CLIP===a?a=43===r?CHOMPING_KEEP:CHOMPING_STRIP:throwError(e,"repeat of a chomping mode identifier");else{if(!((o=fromDecimalCode(r))>=0))break;0===o?throwError(e,"bad explicit indentation width of a block scalar; it cannot be less than one"):p?throwError(e,"repeat of an indentation width identifier"):(s=t+o-1,p=!0)}if(is_WHITE_SPACE(r)){do r=e.input.charCodeAt(++e.position);while(is_WHITE_SPACE(r));if(35===r)do r=e.input.charCodeAt(++e.position);while(!is_EOL(r)&&0!==r)}for(;0!==r;){for(readLineBreak(e),e.lineIndent=0,r=e.input.charCodeAt(e.position);(!p||e.lineIndent<s)&&32===r;)e.lineIndent++,r=e.input.charCodeAt(++e.position);if(!p&&e.lineIndent>s&&(s=e.lineIndent),is_EOL(r))c++;else{if(e.lineIndent<s){a===CHOMPING_KEEP?e.result+=common.repeat("\n",c):a===CHOMPING_CLIP&&p&&(e.result+="\n");break}for(i?is_WHITE_SPACE(r)?(l=!0,e.result+=common.repeat("\n",c+1)):l?(l=!1,e.result+=common.repeat("\n",c+1)):0===c?p&&(e.result+=" "):e.result+=common.repeat("\n",c):p?e.result+=common.repeat("\n",c+1):e.result+=common.repeat("\n",c),p=!0,c=0,n=e.position;!is_EOL(r)&&0!==r;)r=e.input.charCodeAt(++e.position);captureSegment(e,n,e.position,!1)}}return!0}function readBlockSequence(e,t){var n,i,o,r=e.tag,a=e.anchor,p=[],s=!1;for(null!==e.anchor&&(e.anchorMap[e.anchor]=p),o=e.input.charCodeAt(e.position);0!==o&&45===o&&(i=e.input.charCodeAt(e.position+1),is_WS_OR_EOL(i));)if(s=!0,e.position++,skipSeparationSpace(e,!0,-1)&&e.lineIndent<=t)p.push(null),o=e.input.charCodeAt(e.position);else if(n=e.line,composeNode(e,t,CONTEXT_BLOCK_IN,!1,!0),p.push(e.result),skipSeparationSpace(e,!0,-1),o=e.input.charCodeAt(e.position),(e.line===n||e.lineIndent>t)&&0!==o)throwError(e,"bad indentation of a sequence entry");else if(e.lineIndent<t)break;return s?(e.tag=r,e.anchor=a,e.kind="sequence",e.result=p,!0):!1}function readBlockMapping(e,t,n){var i,o,r,a,p=e.tag,s=e.anchor,c={},l=null,u=null,d=null,h=!1,f=!1;for(null!==e.anchor&&(e.anchorMap[e.anchor]=c),a=e.input.charCodeAt(e.position);0!==a;){if(i=e.input.charCodeAt(e.position+1),r=e.line,63!==a&&58!==a||!is_WS_OR_EOL(i)){if(!composeNode(e,n,CONTEXT_FLOW_OUT,!1,!0))break;if(e.line===r){for(a=e.input.charCodeAt(e.position);is_WHITE_SPACE(a);)a=e.input.charCodeAt(++e.position);if(58===a)a=e.input.charCodeAt(++e.position),is_WS_OR_EOL(a)||throwError(e,"a whitespace character is expected after the key-value separator within a block mapping"),h&&(storeMappingPair(e,c,l,u,null),l=u=d=null),f=!0,h=!1,o=!1,l=e.tag,u=e.result;else{if(!f)return e.tag=p,e.anchor=s,!0;throwError(e,"can not read an implicit mapping pair; a colon is missed")}}else{if(!f)return e.tag=p,e.anchor=s,!0;throwError(e,"can not read a block mapping entry; a multiline key may not be an implicit key")}}else 63===a?(h&&(storeMappingPair(e,c,l,u,null),l=u=d=null),f=!0,h=!0,o=!0):h?(h=!1,o=!0):throwError(e,"incomplete explicit mapping pair; a key node is missed"),e.position+=1,a=i;if((e.line===r||e.lineIndent>t)&&(composeNode(e,t,CONTEXT_BLOCK_OUT,!0,o)&&(h?u=e.result:d=e.result),h||(storeMappingPair(e,c,l,u,d),l=u=d=null),skipSeparationSpace(e,!0,-1),a=e.input.charCodeAt(e.position)),e.lineIndent>t&&0!==a)throwError(e,"bad indentation of a mapping entry");else if(e.lineIndent<t)break}return h&&storeMappingPair(e,c,l,u,null),f&&(e.tag=p,e.anchor=s,e.kind="mapping",e.result=c),f}function readTagProperty(e){var t,n,i,o,r=!1,a=!1;if(o=e.input.charCodeAt(e.position),33!==o)return!1;if(null!==e.tag&&throwError(e,"duplication of a tag property"),o=e.input.charCodeAt(++e.position),60===o?(r=!0,o=e.input.charCodeAt(++e.position)):33===o?(a=!0,n="!!",o=e.input.charCodeAt(++e.position)):n="!",t=e.position,r){do o=e.input.charCodeAt(++e.position);while(0!==o&&62!==o);e.position<e.length?(i=e.input.slice(t,e.position),o=e.input.charCodeAt(++e.position)):throwError(e,"unexpected end of the stream within a verbatim tag")}else{for(;0!==o&&!is_WS_OR_EOL(o);)33===o&&(a?throwError(e,"tag suffix cannot contain exclamation marks"):(n=e.input.slice(t-1,e.position+1),PATTERN_TAG_HANDLE.test(n)||throwError(e,"named tag handle cannot contain such characters"),a=!0,t=e.position+1)),o=e.input.charCodeAt(++e.position);i=e.input.slice(t,e.position),PATTERN_FLOW_INDICATORS.test(i)&&throwError(e,"tag suffix cannot contain flow indicator characters")}return i&&!PATTERN_TAG_URI.test(i)&&throwError(e,"tag name cannot contain such characters: "+i),r?e.tag=i:_hasOwnProperty.call(e.tagMap,n)?e.tag=e.tagMap[n]+i:"!"===n?e.tag="!"+i:"!!"===n?e.tag="tag:yaml.org,2002:"+i:throwError(e,'undeclared tag handle "'+n+'"'),!0}function readAnchorProperty(e){var t,n;if(n=e.input.charCodeAt(e.position),38!==n)return!1;for(null!==e.anchor&&throwError(e,"duplication of an anchor property"),n=e.input.charCodeAt(++e.position),t=e.position;0!==n&&!is_WS_OR_EOL(n)&&!is_FLOW_INDICATOR(n);)n=e.input.charCodeAt(++e.position);return e.position===t&&throwError(e,"name of an anchor node must contain at least one character"),e.anchor=e.input.slice(t,e.position),!0}function readAlias(e){var t,n,i;if(i=e.input.charCodeAt(e.position),42!==i)return!1;for(i=e.input.charCodeAt(++e.position),t=e.position;0!==i&&!is_WS_OR_EOL(i)&&!is_FLOW_INDICATOR(i);)i=e.input.charCodeAt(++e.position);return e.position===t&&throwError(e,"name of an alias node must contain at least one character"),n=e.input.slice(t,e.position),e.anchorMap.hasOwnProperty(n)||throwError(e,'unidentified alias "'+n+'"'),e.result=e.anchorMap[n],skipSeparationSpace(e,!0,-1),!0}function composeNode(e,t,n,i,o){var r,a,p,s,c,l,u,d,h=1,f=!1,_=!1;if(e.tag=null,e.anchor=null,e.kind=null,e.result=null,r=a=p=CONTEXT_BLOCK_OUT===n||CONTEXT_BLOCK_IN===n,i&&skipSeparationSpace(e,!0,-1)&&(f=!0,e.lineIndent>t?h=1:e.lineIndent===t?h=0:e.lineIndent<t&&(h=-1)),1===h)for(;readTagProperty(e)||readAnchorProperty(e);)skipSeparationSpace(e,!0,-1)?(f=!0,p=r,e.lineIndent>t?h=1:e.lineIndent===t?h=0:e.lineIndent<t&&(h=-1)):p=!1;if(p&&(p=f||o),(1===h||CONTEXT_BLOCK_OUT===n)&&(u=CONTEXT_FLOW_IN===n||CONTEXT_FLOW_OUT===n?t:t+1,d=e.position-e.lineStart,1===h?p&&(readBlockSequence(e,d)||readBlockMapping(e,d,u))||readFlowCollection(e,u)?_=!0:(a&&readBlockScalar(e,u)||readSingleQuotedScalar(e,u)||readDoubleQuotedScalar(e,u)?_=!0:readAlias(e)?(_=!0,(null!==e.tag||null!==e.anchor)&&throwError(e,"alias node should not have any properties")):readPlainScalar(e,u,CONTEXT_FLOW_IN===n)&&(_=!0,null===e.tag&&(e.tag="?")),null!==e.anchor&&(e.anchorMap[e.anchor]=e.result)):0===h&&(_=p&&readBlockSequence(e,d))),null!==e.tag&&"!"!==e.tag)if("?"===e.tag){for(s=0,c=e.implicitTypes.length;c>s;s+=1)if(l=e.implicitTypes[s],l.resolve(e.result)){e.result=l.construct(e.result),e.tag=l.tag,null!==e.anchor&&(e.anchorMap[e.anchor]=e.result);break}}else _hasOwnProperty.call(e.typeMap,e.tag)?(l=e.typeMap[e.tag],null!==e.result&&l.kind!==e.kind&&throwError(e,"unacceptable node kind for !<"+e.tag+'> tag; it should be "'+l.kind+'", not "'+e.kind+'"'),l.resolve(e.result)?(e.result=l.construct(e.result),null!==e.anchor&&(e.anchorMap[e.anchor]=e.result)):throwError(e,"cannot resolve a node with !<"+e.tag+"> explicit tag")):throwError(e,"unknown tag !<"+e.tag+">");return null!==e.tag||null!==e.anchor||_}function readDocument(e){var t,n,i,o,r=e.position,a=!1;for(e.version=null,e.checkLineBreaks=e.legacy,e.tagMap={},e.anchorMap={};0!==(o=e.input.charCodeAt(e.position))&&(skipSeparationSpace(e,!0,-1),o=e.input.charCodeAt(e.position),!(e.lineIndent>0||37!==o));){for(a=!0,o=e.input.charCodeAt(++e.position),t=e.position;0!==o&&!is_WS_OR_EOL(o);)o=e.input.charCodeAt(++e.position);for(n=e.input.slice(t,e.position),i=[],n.length<1&&throwError(e,"directive name must not be less than one character in length");0!==o;){for(;is_WHITE_SPACE(o);)o=e.input.charCodeAt(++e.position);if(35===o){do o=e.input.charCodeAt(++e.position);while(0!==o&&!is_EOL(o));break}if(is_EOL(o))break;for(t=e.position;0!==o&&!is_WS_OR_EOL(o);)o=e.input.charCodeAt(++e.position);i.push(e.input.slice(t,e.position))}0!==o&&readLineBreak(e),_hasOwnProperty.call(directiveHandlers,n)?directiveHandlers[n](e,n,i):throwWarning(e,'unknown document directive "'+n+'"')}return skipSeparationSpace(e,!0,-1),0===e.lineIndent&&45===e.input.charCodeAt(e.position)&&45===e.input.charCodeAt(e.position+1)&&45===e.input.charCodeAt(e.position+2)?(e.position+=3,skipSeparationSpace(e,!0,-1)):a&&throwError(e,"directives end mark is expected"),composeNode(e,e.lineIndent-1,CONTEXT_BLOCK_OUT,!1,!0),skipSeparationSpace(e,!0,-1),e.checkLineBreaks&&PATTERN_NON_ASCII_LINE_BREAKS.test(e.input.slice(r,e.position))&&throwWarning(e,"non-ASCII line breaks are interpreted as content"),e.documents.push(e.result),e.position===e.lineStart&&testDocumentSeparator(e)?void(46===e.input.charCodeAt(e.position)&&(e.position+=3,skipSeparationSpace(e,!0,-1))):void(e.position<e.length-1&&throwError(e,"end of the stream or a document separator is expected"))}function loadDocuments(e,t){e=String(e),t=t||{},0!==e.length&&(10!==e.charCodeAt(e.length-1)&&13!==e.charCodeAt(e.length-1)&&(e+="\n"),65279===e.charCodeAt(0)&&(e=e.slice(1)));var n=new State(e,t);for(PATTERN_NON_PRINTABLE.test(n.input)&&throwError(n,"the stream contains non-printable characters"),n.input+="\x00";32===n.input.charCodeAt(n.position);)n.lineIndent+=1,n.position+=1;for(;n.position<n.length-1;)readDocument(n);return n.documents}function loadAll(e,t,n){var i,o,r=loadDocuments(e,n);for(i=0,o=r.length;o>i;i+=1)t(r[i])}function load(e,t){var n=loadDocuments(e,t);if(0===n.length)return void 0;if(1===n.length)return n[0];throw new YAMLException("expected a single document in the stream, but found more")}function safeLoadAll(e,t,n){loadAll(e,t,common.extend({schema:DEFAULT_SAFE_SCHEMA},n))}function safeLoad(e,t){return load(e,common.extend({schema:DEFAULT_SAFE_SCHEMA},t))}for(var common=require("./common"),YAMLException=require("./exception"),Mark=require("./mark"),DEFAULT_SAFE_SCHEMA=require("./schema/default_safe"),DEFAULT_FULL_SCHEMA=require("./schema/default_full"),_hasOwnProperty=Object.prototype.hasOwnProperty,CONTEXT_FLOW_IN=1,CONTEXT_FLOW_OUT=2,CONTEXT_BLOCK_IN=3,CONTEXT_BLOCK_OUT=4,CHOMPING_CLIP=1,CHOMPING_STRIP=2,CHOMPING_KEEP=3,PATTERN_NON_PRINTABLE=/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/,PATTERN_NON_ASCII_LINE_BREAKS=/[\x85\u2028\u2029]/,PATTERN_FLOW_INDICATORS=/[,\[\]\{\}]/,PATTERN_TAG_HANDLE=/^(?:!|!!|![a-z\-]+!)$/i,PATTERN_TAG_URI=/^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i,simpleEscapeCheck=new Array(256),simpleEscapeMap=new Array(256),i=0;256>i;i++)simpleEscapeCheck[i]=simpleEscapeSequence(i)?1:0,simpleEscapeMap[i]=simpleEscapeSequence(i);var directiveHandlers={YAML:function(e,t,n){var i,o,r;null!==e.version&&throwError(e,"duplication of %YAML directive"),1!==n.length&&throwError(e,"YAML directive accepts exactly one argument"),i=/^([0-9]+)\.([0-9]+)$/.exec(n[0]),null===i&&throwError(e,"ill-formed argument of the YAML directive"),o=parseInt(i[1],10),r=parseInt(i[2],10),1!==o&&throwError(e,"unacceptable YAML version of the document"),e.version=n[0],e.checkLineBreaks=2>r,1!==r&&2!==r&&throwWarning(e,"unsupported YAML version of the document")},TAG:function(e,t,n){var i,o;2!==n.length&&throwError(e,"TAG directive accepts exactly two arguments"),i=n[0],o=n[1],PATTERN_TAG_HANDLE.test(i)||throwError(e,"ill-formed tag handle (first argument) of the TAG directive"),_hasOwnProperty.call(e.tagMap,i)&&throwError(e,'there is a previously declared suffix for "'+i+'" tag handle'),PATTERN_TAG_URI.test(o)||throwError(e,"ill-formed tag prefix (second argument) of the TAG directive"),e.tagMap[i]=o}};module.exports.loadAll=loadAll,module.exports.load=load,module.exports.safeLoadAll=safeLoadAll,module.exports.safeLoad=safeLoad;
+},{"inherit":29}],39:[function(require,module,exports){
+"use strict";function is_EOL(e){return 10===e||13===e}function is_WHITE_SPACE(e){return 9===e||32===e}function is_WS_OR_EOL(e){return 9===e||32===e||10===e||13===e}function is_FLOW_INDICATOR(e){return 44===e||91===e||93===e||123===e||125===e}function fromHexCode(e){var t;return e>=48&&57>=e?e-48:(t=32|e,t>=97&&102>=t?t-97+10:-1)}function escapedHexLen(e){return 120===e?2:117===e?4:85===e?8:0}function fromDecimalCode(e){return e>=48&&57>=e?e-48:-1}function simpleEscapeSequence(e){return 48===e?"\x00":97===e?"":98===e?"\b":116===e?"	":9===e?"	":110===e?"\n":118===e?"\x0B":102===e?"\f":114===e?"\r":101===e?"":32===e?" ":34===e?'"':47===e?"/":92===e?"\\":78===e?"…":95===e?" ":76===e?"\u2028":80===e?"\u2029":""}function charFromCodepoint(e){return 65535>=e?String.fromCharCode(e):String.fromCharCode((e-65536>>10)+55296,(e-65536&1023)+56320)}function State(e,t){this.input=e,this.filename=t.filename||null,this.schema=t.schema||DEFAULT_FULL_SCHEMA,this.onWarning=t.onWarning||null,this.legacy=t.legacy||!1,this.implicitTypes=this.schema.compiledImplicit,this.typeMap=this.schema.compiledTypeMap,this.length=e.length,this.position=0,this.line=0,this.lineStart=0,this.lineIndent=0,this.documents=[]}function generateError(e,t){return new YAMLException(t,new Mark(e.filename,e.input,e.position,e.line,e.position-e.lineStart))}function throwError(e,t){throw generateError(e,t)}function throwWarning(e,t){e.onWarning&&e.onWarning.call(null,generateError(e,t))}function captureSegment(e,t,n,i){var o,r,a,p;if(n>t){if(p=e.input.slice(t,n),i)for(o=0,r=p.length;r>o;o+=1)a=p.charCodeAt(o),9===a||a>=32&&1114111>=a||throwError(e,"expected valid JSON character");else PATTERN_NON_PRINTABLE.test(p)&&throwError(e,"the stream contains non-printable characters");e.result+=p}}function mergeMappings(e,t,n){var i,o,r,a;for(common.isObject(n)||throwError(e,"cannot merge mappings; the provided source object is unacceptable"),i=Object.keys(n),r=0,a=i.length;a>r;r+=1)o=i[r],_hasOwnProperty.call(t,o)||(t[o]=n[o])}function storeMappingPair(e,t,n,i,o){var r,a;if(i=String(i),null===t&&(t={}),"tag:yaml.org,2002:merge"===n)if(Array.isArray(o))for(r=0,a=o.length;a>r;r+=1)mergeMappings(e,t,o[r]);else mergeMappings(e,t,o);else t[i]=o;return t}function readLineBreak(e){var t;t=e.input.charCodeAt(e.position),10===t?e.position++:13===t?(e.position++,10===e.input.charCodeAt(e.position)&&e.position++):throwError(e,"a line break is expected"),e.line+=1,e.lineStart=e.position}function skipSeparationSpace(e,t,n){for(var i=0,o=e.input.charCodeAt(e.position);0!==o;){for(;is_WHITE_SPACE(o);)o=e.input.charCodeAt(++e.position);if(t&&35===o)do o=e.input.charCodeAt(++e.position);while(10!==o&&13!==o&&0!==o);if(!is_EOL(o))break;for(readLineBreak(e),o=e.input.charCodeAt(e.position),i++,e.lineIndent=0;32===o;)e.lineIndent++,o=e.input.charCodeAt(++e.position)}return-1!==n&&0!==i&&e.lineIndent<n&&throwWarning(e,"deficient indentation"),i}function testDocumentSeparator(e){var t,n=e.position;return t=e.input.charCodeAt(n),45!==t&&46!==t||e.input.charCodeAt(n+1)!==t||e.input.charCodeAt(n+2)!==t||(n+=3,t=e.input.charCodeAt(n),0!==t&&!is_WS_OR_EOL(t))?!1:!0}function writeFoldedLines(e,t){1===t?e.result+=" ":t>1&&(e.result+=common.repeat("\n",t-1))}function readPlainScalar(e,t,n){var i,o,r,a,p,s,c,l,u,d=e.kind,h=e.result;if(u=e.input.charCodeAt(e.position),is_WS_OR_EOL(u)||is_FLOW_INDICATOR(u)||35===u||38===u||42===u||33===u||124===u||62===u||39===u||34===u||37===u||64===u||96===u)return!1;if((63===u||45===u)&&(o=e.input.charCodeAt(e.position+1),is_WS_OR_EOL(o)||n&&is_FLOW_INDICATOR(o)))return!1;for(e.kind="scalar",e.result="",r=a=e.position,p=!1;0!==u;){if(58===u){if(o=e.input.charCodeAt(e.position+1),is_WS_OR_EOL(o)||n&&is_FLOW_INDICATOR(o))break}else if(35===u){if(i=e.input.charCodeAt(e.position-1),is_WS_OR_EOL(i))break}else{if(e.position===e.lineStart&&testDocumentSeparator(e)||n&&is_FLOW_INDICATOR(u))break;if(is_EOL(u)){if(s=e.line,c=e.lineStart,l=e.lineIndent,skipSeparationSpace(e,!1,-1),e.lineIndent>=t){p=!0,u=e.input.charCodeAt(e.position);continue}e.position=a,e.line=s,e.lineStart=c,e.lineIndent=l;break}}p&&(captureSegment(e,r,a,!1),writeFoldedLines(e,e.line-s),r=a=e.position,p=!1),is_WHITE_SPACE(u)||(a=e.position+1),u=e.input.charCodeAt(++e.position)}return captureSegment(e,r,a,!1),e.result?!0:(e.kind=d,e.result=h,!1)}function readSingleQuotedScalar(e,t){var n,i,o;if(n=e.input.charCodeAt(e.position),39!==n)return!1;for(e.kind="scalar",e.result="",e.position++,i=o=e.position;0!==(n=e.input.charCodeAt(e.position));)if(39===n){if(captureSegment(e,i,e.position,!0),n=e.input.charCodeAt(++e.position),39!==n)return!0;i=o=e.position,e.position++}else is_EOL(n)?(captureSegment(e,i,o,!0),writeFoldedLines(e,skipSeparationSpace(e,!1,t)),i=o=e.position):e.position===e.lineStart&&testDocumentSeparator(e)?throwError(e,"unexpected end of the document within a single quoted scalar"):(e.position++,o=e.position);throwError(e,"unexpected end of the stream within a single quoted scalar")}function readDoubleQuotedScalar(e,t){var n,i,o,r,a,p;if(p=e.input.charCodeAt(e.position),34!==p)return!1;for(e.kind="scalar",e.result="",e.position++,n=i=e.position;0!==(p=e.input.charCodeAt(e.position));){if(34===p)return captureSegment(e,n,e.position,!0),e.position++,!0;if(92===p){if(captureSegment(e,n,e.position,!0),p=e.input.charCodeAt(++e.position),is_EOL(p))skipSeparationSpace(e,!1,t);else if(256>p&&simpleEscapeCheck[p])e.result+=simpleEscapeMap[p],e.position++;else if((a=escapedHexLen(p))>0){for(o=a,r=0;o>0;o--)p=e.input.charCodeAt(++e.position),(a=fromHexCode(p))>=0?r=(r<<4)+a:throwError(e,"expected hexadecimal character");e.result+=charFromCodepoint(r),e.position++}else throwError(e,"unknown escape sequence");n=i=e.position}else is_EOL(p)?(captureSegment(e,n,i,!0),writeFoldedLines(e,skipSeparationSpace(e,!1,t)),n=i=e.position):e.position===e.lineStart&&testDocumentSeparator(e)?throwError(e,"unexpected end of the document within a double quoted scalar"):(e.position++,i=e.position)}throwError(e,"unexpected end of the stream within a double quoted scalar")}function readFlowCollection(e,t){var n,i,o,r,a,p,s,c,l,u,d,h=!0,f=e.tag,_=e.anchor;if(d=e.input.charCodeAt(e.position),91===d)r=93,s=!1,i=[];else{if(123!==d)return!1;r=125,s=!0,i={}}for(null!==e.anchor&&(e.anchorMap[e.anchor]=i),d=e.input.charCodeAt(++e.position);0!==d;){if(skipSeparationSpace(e,!0,t),d=e.input.charCodeAt(e.position),d===r)return e.position++,e.tag=f,e.anchor=_,e.kind=s?"mapping":"sequence",e.result=i,!0;h||throwError(e,"missed comma between flow collection entries"),l=c=u=null,a=p=!1,63===d&&(o=e.input.charCodeAt(e.position+1),is_WS_OR_EOL(o)&&(a=p=!0,e.position++,skipSeparationSpace(e,!0,t))),n=e.line,composeNode(e,t,CONTEXT_FLOW_IN,!1,!0),l=e.tag,c=e.result,skipSeparationSpace(e,!0,t),d=e.input.charCodeAt(e.position),!p&&e.line!==n||58!==d||(a=!0,d=e.input.charCodeAt(++e.position),skipSeparationSpace(e,!0,t),composeNode(e,t,CONTEXT_FLOW_IN,!1,!0),u=e.result),s?storeMappingPair(e,i,l,c,u):a?i.push(storeMappingPair(e,null,l,c,u)):i.push(c),skipSeparationSpace(e,!0,t),d=e.input.charCodeAt(e.position),44===d?(h=!0,d=e.input.charCodeAt(++e.position)):h=!1}throwError(e,"unexpected end of the stream within a flow collection")}function readBlockScalar(e,t){var n,i,o,r,a=CHOMPING_CLIP,p=!1,s=t,c=0,l=!1;if(r=e.input.charCodeAt(e.position),124===r)i=!1;else{if(62!==r)return!1;i=!0}for(e.kind="scalar",e.result="";0!==r;)if(r=e.input.charCodeAt(++e.position),43===r||45===r)CHOMPING_CLIP===a?a=43===r?CHOMPING_KEEP:CHOMPING_STRIP:throwError(e,"repeat of a chomping mode identifier");else{if(!((o=fromDecimalCode(r))>=0))break;0===o?throwError(e,"bad explicit indentation width of a block scalar; it cannot be less than one"):p?throwError(e,"repeat of an indentation width identifier"):(s=t+o-1,p=!0)}if(is_WHITE_SPACE(r)){do r=e.input.charCodeAt(++e.position);while(is_WHITE_SPACE(r));if(35===r)do r=e.input.charCodeAt(++e.position);while(!is_EOL(r)&&0!==r)}for(;0!==r;){for(readLineBreak(e),e.lineIndent=0,r=e.input.charCodeAt(e.position);(!p||e.lineIndent<s)&&32===r;)e.lineIndent++,r=e.input.charCodeAt(++e.position);if(!p&&e.lineIndent>s&&(s=e.lineIndent),is_EOL(r))c++;else{if(e.lineIndent<s){a===CHOMPING_KEEP?e.result+=common.repeat("\n",c):a===CHOMPING_CLIP&&p&&(e.result+="\n");break}for(i?is_WHITE_SPACE(r)?(l=!0,e.result+=common.repeat("\n",c+1)):l?(l=!1,e.result+=common.repeat("\n",c+1)):0===c?p&&(e.result+=" "):e.result+=common.repeat("\n",c):p?e.result+=common.repeat("\n",c+1):e.result+=common.repeat("\n",c),p=!0,c=0,n=e.position;!is_EOL(r)&&0!==r;)r=e.input.charCodeAt(++e.position);captureSegment(e,n,e.position,!1)}}return!0}function readBlockSequence(e,t){var n,i,o,r=e.tag,a=e.anchor,p=[],s=!1;for(null!==e.anchor&&(e.anchorMap[e.anchor]=p),o=e.input.charCodeAt(e.position);0!==o&&45===o&&(i=e.input.charCodeAt(e.position+1),is_WS_OR_EOL(i));)if(s=!0,e.position++,skipSeparationSpace(e,!0,-1)&&e.lineIndent<=t)p.push(null),o=e.input.charCodeAt(e.position);else if(n=e.line,composeNode(e,t,CONTEXT_BLOCK_IN,!1,!0),p.push(e.result),skipSeparationSpace(e,!0,-1),o=e.input.charCodeAt(e.position),(e.line===n||e.lineIndent>t)&&0!==o)throwError(e,"bad indentation of a sequence entry");else if(e.lineIndent<t)break;return s?(e.tag=r,e.anchor=a,e.kind="sequence",e.result=p,!0):!1}function readBlockMapping(e,t,n){var i,o,r,a,p=e.tag,s=e.anchor,c={},l=null,u=null,d=null,h=!1,f=!1;for(null!==e.anchor&&(e.anchorMap[e.anchor]=c),a=e.input.charCodeAt(e.position);0!==a;){if(i=e.input.charCodeAt(e.position+1),r=e.line,63!==a&&58!==a||!is_WS_OR_EOL(i)){if(!composeNode(e,n,CONTEXT_FLOW_OUT,!1,!0))break;if(e.line===r){for(a=e.input.charCodeAt(e.position);is_WHITE_SPACE(a);)a=e.input.charCodeAt(++e.position);if(58===a)a=e.input.charCodeAt(++e.position),is_WS_OR_EOL(a)||throwError(e,"a whitespace character is expected after the key-value separator within a block mapping"),h&&(storeMappingPair(e,c,l,u,null),l=u=d=null),f=!0,h=!1,o=!1,l=e.tag,u=e.result;else{if(!f)return e.tag=p,e.anchor=s,!0;throwError(e,"can not read an implicit mapping pair; a colon is missed")}}else{if(!f)return e.tag=p,e.anchor=s,!0;throwError(e,"can not read a block mapping entry; a multiline key may not be an implicit key")}}else 63===a?(h&&(storeMappingPair(e,c,l,u,null),l=u=d=null),f=!0,h=!0,o=!0):h?(h=!1,o=!0):throwError(e,"incomplete explicit mapping pair; a key node is missed"),e.position+=1,a=i;if((e.line===r||e.lineIndent>t)&&(composeNode(e,t,CONTEXT_BLOCK_OUT,!0,o)&&(h?u=e.result:d=e.result),h||(storeMappingPair(e,c,l,u,d),l=u=d=null),skipSeparationSpace(e,!0,-1),a=e.input.charCodeAt(e.position)),e.lineIndent>t&&0!==a)throwError(e,"bad indentation of a mapping entry");else if(e.lineIndent<t)break}return h&&storeMappingPair(e,c,l,u,null),f&&(e.tag=p,e.anchor=s,e.kind="mapping",e.result=c),f}function readTagProperty(e){var t,n,i,o,r=!1,a=!1;if(o=e.input.charCodeAt(e.position),33!==o)return!1;if(null!==e.tag&&throwError(e,"duplication of a tag property"),o=e.input.charCodeAt(++e.position),60===o?(r=!0,o=e.input.charCodeAt(++e.position)):33===o?(a=!0,n="!!",o=e.input.charCodeAt(++e.position)):n="!",t=e.position,r){do o=e.input.charCodeAt(++e.position);while(0!==o&&62!==o);e.position<e.length?(i=e.input.slice(t,e.position),o=e.input.charCodeAt(++e.position)):throwError(e,"unexpected end of the stream within a verbatim tag")}else{for(;0!==o&&!is_WS_OR_EOL(o);)33===o&&(a?throwError(e,"tag suffix cannot contain exclamation marks"):(n=e.input.slice(t-1,e.position+1),PATTERN_TAG_HANDLE.test(n)||throwError(e,"named tag handle cannot contain such characters"),a=!0,t=e.position+1)),o=e.input.charCodeAt(++e.position);i=e.input.slice(t,e.position),PATTERN_FLOW_INDICATORS.test(i)&&throwError(e,"tag suffix cannot contain flow indicator characters")}return i&&!PATTERN_TAG_URI.test(i)&&throwError(e,"tag name cannot contain such characters: "+i),r?e.tag=i:_hasOwnProperty.call(e.tagMap,n)?e.tag=e.tagMap[n]+i:"!"===n?e.tag="!"+i:"!!"===n?e.tag="tag:yaml.org,2002:"+i:throwError(e,'undeclared tag handle "'+n+'"'),!0}function readAnchorProperty(e){var t,n;if(n=e.input.charCodeAt(e.position),38!==n)return!1;for(null!==e.anchor&&throwError(e,"duplication of an anchor property"),n=e.input.charCodeAt(++e.position),t=e.position;0!==n&&!is_WS_OR_EOL(n)&&!is_FLOW_INDICATOR(n);)n=e.input.charCodeAt(++e.position);return e.position===t&&throwError(e,"name of an anchor node must contain at least one character"),e.anchor=e.input.slice(t,e.position),!0}function readAlias(e){var t,n,i;if(i=e.input.charCodeAt(e.position),42!==i)return!1;for(i=e.input.charCodeAt(++e.position),t=e.position;0!==i&&!is_WS_OR_EOL(i)&&!is_FLOW_INDICATOR(i);)i=e.input.charCodeAt(++e.position);return e.position===t&&throwError(e,"name of an alias node must contain at least one character"),n=e.input.slice(t,e.position),e.anchorMap.hasOwnProperty(n)||throwError(e,'unidentified alias "'+n+'"'),e.result=e.anchorMap[n],skipSeparationSpace(e,!0,-1),!0}function composeNode(e,t,n,i,o){var r,a,p,s,c,l,u,d,h=1,f=!1,_=!1;if(e.tag=null,e.anchor=null,e.kind=null,e.result=null,r=a=p=CONTEXT_BLOCK_OUT===n||CONTEXT_BLOCK_IN===n,i&&skipSeparationSpace(e,!0,-1)&&(f=!0,e.lineIndent>t?h=1:e.lineIndent===t?h=0:e.lineIndent<t&&(h=-1)),1===h)for(;readTagProperty(e)||readAnchorProperty(e);)skipSeparationSpace(e,!0,-1)?(f=!0,p=r,e.lineIndent>t?h=1:e.lineIndent===t?h=0:e.lineIndent<t&&(h=-1)):p=!1;if(p&&(p=f||o),(1===h||CONTEXT_BLOCK_OUT===n)&&(u=CONTEXT_FLOW_IN===n||CONTEXT_FLOW_OUT===n?t:t+1,d=e.position-e.lineStart,1===h?p&&(readBlockSequence(e,d)||readBlockMapping(e,d,u))||readFlowCollection(e,u)?_=!0:(a&&readBlockScalar(e,u)||readSingleQuotedScalar(e,u)||readDoubleQuotedScalar(e,u)?_=!0:readAlias(e)?(_=!0,(null!==e.tag||null!==e.anchor)&&throwError(e,"alias node should not have any properties")):readPlainScalar(e,u,CONTEXT_FLOW_IN===n)&&(_=!0,null===e.tag&&(e.tag="?")),null!==e.anchor&&(e.anchorMap[e.anchor]=e.result)):0===h&&(_=p&&readBlockSequence(e,d))),null!==e.tag&&"!"!==e.tag)if("?"===e.tag){for(s=0,c=e.implicitTypes.length;c>s;s+=1)if(l=e.implicitTypes[s],l.resolve(e.result)){e.result=l.construct(e.result),e.tag=l.tag,null!==e.anchor&&(e.anchorMap[e.anchor]=e.result);break}}else _hasOwnProperty.call(e.typeMap,e.tag)?(l=e.typeMap[e.tag],null!==e.result&&l.kind!==e.kind&&throwError(e,"unacceptable node kind for !<"+e.tag+'> tag; it should be "'+l.kind+'", not "'+e.kind+'"'),l.resolve(e.result)?(e.result=l.construct(e.result),null!==e.anchor&&(e.anchorMap[e.anchor]=e.result)):throwError(e,"cannot resolve a node with !<"+e.tag+"> explicit tag")):throwError(e,"unknown tag !<"+e.tag+">");return null!==e.tag||null!==e.anchor||_}function readDocument(e){var t,n,i,o,r=e.position,a=!1;for(e.version=null,e.checkLineBreaks=e.legacy,e.tagMap={},e.anchorMap={};0!==(o=e.input.charCodeAt(e.position))&&(skipSeparationSpace(e,!0,-1),o=e.input.charCodeAt(e.position),!(e.lineIndent>0||37!==o));){for(a=!0,o=e.input.charCodeAt(++e.position),t=e.position;0!==o&&!is_WS_OR_EOL(o);)o=e.input.charCodeAt(++e.position);for(n=e.input.slice(t,e.position),i=[],n.length<1&&throwError(e,"directive name must not be less than one character in length");0!==o;){for(;is_WHITE_SPACE(o);)o=e.input.charCodeAt(++e.position);if(35===o){do o=e.input.charCodeAt(++e.position);while(0!==o&&!is_EOL(o));break}if(is_EOL(o))break;for(t=e.position;0!==o&&!is_WS_OR_EOL(o);)o=e.input.charCodeAt(++e.position);i.push(e.input.slice(t,e.position))}0!==o&&readLineBreak(e),_hasOwnProperty.call(directiveHandlers,n)?directiveHandlers[n](e,n,i):throwWarning(e,'unknown document directive "'+n+'"')}return skipSeparationSpace(e,!0,-1),0===e.lineIndent&&45===e.input.charCodeAt(e.position)&&45===e.input.charCodeAt(e.position+1)&&45===e.input.charCodeAt(e.position+2)?(e.position+=3,skipSeparationSpace(e,!0,-1)):a&&throwError(e,"directives end mark is expected"),composeNode(e,e.lineIndent-1,CONTEXT_BLOCK_OUT,!1,!0),skipSeparationSpace(e,!0,-1),e.checkLineBreaks&&PATTERN_NON_ASCII_LINE_BREAKS.test(e.input.slice(r,e.position))&&throwWarning(e,"non-ASCII line breaks are interpreted as content"),e.documents.push(e.result),e.position===e.lineStart&&testDocumentSeparator(e)?void(46===e.input.charCodeAt(e.position)&&(e.position+=3,skipSeparationSpace(e,!0,-1))):void(e.position<e.length-1&&throwError(e,"end of the stream or a document separator is expected"))}function loadDocuments(e,t){e=String(e),t=t||{},0!==e.length&&(10!==e.charCodeAt(e.length-1)&&13!==e.charCodeAt(e.length-1)&&(e+="\n"),65279===e.charCodeAt(0)&&(e=e.slice(1)));var n=new State(e,t);for(n.input+="\x00";32===n.input.charCodeAt(n.position);)n.lineIndent+=1,n.position+=1;for(;n.position<n.length-1;)readDocument(n);return n.documents}function loadAll(e,t,n){var i,o,r=loadDocuments(e,n);for(i=0,o=r.length;o>i;i+=1)t(r[i])}function load(e,t){var n=loadDocuments(e,t);if(0!==n.length){if(1===n.length)return n[0];throw new YAMLException("expected a single document in the stream, but found more")}}function safeLoadAll(e,t,n){loadAll(e,t,common.extend({schema:DEFAULT_SAFE_SCHEMA},n))}function safeLoad(e,t){return load(e,common.extend({schema:DEFAULT_SAFE_SCHEMA},t))}for(var common=require("./common"),YAMLException=require("./exception"),Mark=require("./mark"),DEFAULT_SAFE_SCHEMA=require("./schema/default_safe"),DEFAULT_FULL_SCHEMA=require("./schema/default_full"),_hasOwnProperty=Object.prototype.hasOwnProperty,CONTEXT_FLOW_IN=1,CONTEXT_FLOW_OUT=2,CONTEXT_BLOCK_IN=3,CONTEXT_BLOCK_OUT=4,CHOMPING_CLIP=1,CHOMPING_STRIP=2,CHOMPING_KEEP=3,PATTERN_NON_PRINTABLE=/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/,PATTERN_NON_ASCII_LINE_BREAKS=/[\x85\u2028\u2029]/,PATTERN_FLOW_INDICATORS=/[,\[\]\{\}]/,PATTERN_TAG_HANDLE=/^(?:!|!!|![a-z\-]+!)$/i,PATTERN_TAG_URI=/^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i,simpleEscapeCheck=new Array(256),simpleEscapeMap=new Array(256),i=0;256>i;i++)simpleEscapeCheck[i]=simpleEscapeSequence(i)?1:0,simpleEscapeMap[i]=simpleEscapeSequence(i);var directiveHandlers={YAML:function(e,t,n){var i,o,r;null!==e.version&&throwError(e,"duplication of %YAML directive"),1!==n.length&&throwError(e,"YAML directive accepts exactly one argument"),i=/^([0-9]+)\.([0-9]+)$/.exec(n[0]),null===i&&throwError(e,"ill-formed argument of the YAML directive"),o=parseInt(i[1],10),r=parseInt(i[2],10),1!==o&&throwError(e,"unacceptable YAML version of the document"),e.version=n[0],e.checkLineBreaks=2>r,1!==r&&2!==r&&throwWarning(e,"unsupported YAML version of the document")},TAG:function(e,t,n){var i,o;2!==n.length&&throwError(e,"TAG directive accepts exactly two arguments"),i=n[0],o=n[1],PATTERN_TAG_HANDLE.test(i)||throwError(e,"ill-formed tag handle (first argument) of the TAG directive"),_hasOwnProperty.call(e.tagMap,i)&&throwError(e,'there is a previously declared suffix for "'+i+'" tag handle'),PATTERN_TAG_URI.test(o)||throwError(e,"ill-formed tag prefix (second argument) of the TAG directive"),e.tagMap[i]=o}};module.exports.loadAll=loadAll,module.exports.load=load,module.exports.safeLoadAll=safeLoadAll,module.exports.safeLoad=safeLoad;
 
 },{"./common":36,"./exception":38,"./mark":40,"./schema/default_full":43,"./schema/default_safe":44}],40:[function(require,module,exports){
 "use strict";function Mark(t,i,n,e,r){this.name=t,this.buffer=i,this.position=n,this.line=e,this.column=r}var common=require("./common");Mark.prototype.getSnippet=function(t,i){var n,e,r,o,s;if(!this.buffer)return null;for(t=t||4,i=i||75,n="",e=this.position;e>0&&-1==="\x00\r\n…\u2028\u2029".indexOf(this.buffer.charAt(e-1));)if(e-=1,this.position-e>i/2-1){n=" ... ",e+=5;break}for(r="",o=this.position;o<this.buffer.length&&-1==="\x00\r\n…\u2028\u2029".indexOf(this.buffer.charAt(o));)if(o+=1,o-this.position>i/2-1){r=" ... ",o-=5;break}return s=this.buffer.slice(e,o),common.repeat(" ",t)+n+s+r+"\n"+common.repeat(" ",t+this.position-e+n.length)+"^"},Mark.prototype.toString=function(t){var i,n="";return this.name&&(n+='in "'+this.name+'" '),n+="at line "+(this.line+1)+", column "+(this.column+1),t||(i=this.getSnippet(),i&&(n+=":\n"+i)),n},module.exports=Mark;
@@ -189,7 +194,7 @@ module.exports=Array.isArray||function(r){return"[object Array]"==Object.prototy
 "use strict";function resolveYamlBoolean(e){if(null===e)return!1;var r=e.length;return 4===r&&("true"===e||"True"===e||"TRUE"===e)||5===r&&("false"===e||"False"===e||"FALSE"===e)}function constructYamlBoolean(e){return"true"===e||"True"===e||"TRUE"===e}function isBoolean(e){return"[object Boolean]"===Object.prototype.toString.call(e)}var Type=require("../type");module.exports=new Type("tag:yaml.org,2002:bool",{kind:"scalar",resolve:resolveYamlBoolean,construct:constructYamlBoolean,predicate:isBoolean,represent:{lowercase:function(e){return e?"true":"false"},uppercase:function(e){return e?"TRUE":"FALSE"},camelcase:function(e){return e?"True":"False"}},defaultStyle:"lowercase"});
 
 },{"../type":47}],50:[function(require,module,exports){
-"use strict";function resolveYamlFloat(e){return null===e?!1:YAML_FLOAT_PATTERN.test(e)?!0:!1}function constructYamlFloat(e){var r,t,a,n;return r=e.replace(/_/g,"").toLowerCase(),t="-"===r[0]?-1:1,n=[],0<="+-".indexOf(r[0])&&(r=r.slice(1)),".inf"===r?1===t?Number.POSITIVE_INFINITY:Number.NEGATIVE_INFINITY:".nan"===r?NaN:0<=r.indexOf(":")?(r.split(":").forEach(function(e){n.unshift(parseFloat(e,10))}),r=0,a=1,n.forEach(function(e){r+=e*a,a*=60}),t*r):t*parseFloat(r,10)}function representYamlFloat(e,r){if(isNaN(e))switch(r){case"lowercase":return".nan";case"uppercase":return".NAN";case"camelcase":return".NaN"}else if(Number.POSITIVE_INFINITY===e)switch(r){case"lowercase":return".inf";case"uppercase":return".INF";case"camelcase":return".Inf"}else if(Number.NEGATIVE_INFINITY===e)switch(r){case"lowercase":return"-.inf";case"uppercase":return"-.INF";case"camelcase":return"-.Inf"}else if(common.isNegativeZero(e))return"-0.0";return e.toString(10)}function isFloat(e){return"[object Number]"===Object.prototype.toString.call(e)&&(0!==e%1||common.isNegativeZero(e))}var common=require("../common"),Type=require("../type"),YAML_FLOAT_PATTERN=new RegExp("^(?:[-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+][0-9]+)?|\\.[0-9_]+(?:[eE][-+][0-9]+)?|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*|[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");module.exports=new Type("tag:yaml.org,2002:float",{kind:"scalar",resolve:resolveYamlFloat,construct:constructYamlFloat,predicate:isFloat,represent:representYamlFloat,defaultStyle:"lowercase"});
+"use strict";function resolveYamlFloat(e){return null===e?!1:YAML_FLOAT_PATTERN.test(e)?!0:!1}function constructYamlFloat(e){var r,t,a,n;return r=e.replace(/_/g,"").toLowerCase(),t="-"===r[0]?-1:1,n=[],0<="+-".indexOf(r[0])&&(r=r.slice(1)),".inf"===r?1===t?Number.POSITIVE_INFINITY:Number.NEGATIVE_INFINITY:".nan"===r?NaN:0<=r.indexOf(":")?(r.split(":").forEach(function(e){n.unshift(parseFloat(e,10))}),r=0,a=1,n.forEach(function(e){r+=e*a,a*=60}),t*r):t*parseFloat(r,10)}function representYamlFloat(e,r){var t;if(isNaN(e))switch(r){case"lowercase":return".nan";case"uppercase":return".NAN";case"camelcase":return".NaN"}else if(Number.POSITIVE_INFINITY===e)switch(r){case"lowercase":return".inf";case"uppercase":return".INF";case"camelcase":return".Inf"}else if(Number.NEGATIVE_INFINITY===e)switch(r){case"lowercase":return"-.inf";case"uppercase":return"-.INF";case"camelcase":return"-.Inf"}else if(common.isNegativeZero(e))return"-0.0";return t=e.toString(10),SCIENTIFIC_WITHOUT_DOT.test(t)?t.replace("e",".e"):t}function isFloat(e){return"[object Number]"===Object.prototype.toString.call(e)&&(0!==e%1||common.isNegativeZero(e))}var common=require("../common"),Type=require("../type"),YAML_FLOAT_PATTERN=new RegExp("^(?:[-+]?(?:[0-9][0-9_]*)\\.[0-9_]*(?:[eE][-+][0-9]+)?|\\.[0-9_]+(?:[eE][-+][0-9]+)?|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*|[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$"),SCIENTIFIC_WITHOUT_DOT=/^[-+]?[0-9]+e/;module.exports=new Type("tag:yaml.org,2002:float",{kind:"scalar",resolve:resolveYamlFloat,construct:constructYamlFloat,predicate:isFloat,represent:representYamlFloat,defaultStyle:"lowercase"});
 
 },{"../common":36,"../type":47}],51:[function(require,module,exports){
 "use strict";function isHexCode(e){return e>=48&&57>=e||e>=65&&70>=e||e>=97&&102>=e}function isOctCode(e){return e>=48&&55>=e}function isDecCode(e){return e>=48&&57>=e}function resolveYamlInteger(e){if(null===e)return!1;var r,t=e.length,n=0,i=!1;if(!t)return!1;if(r=e[n],("-"===r||"+"===r)&&(r=e[++n]),"0"===r){if(n+1===t)return!0;if(r=e[++n],"b"===r){for(n++;t>n;n++)if(r=e[n],"_"!==r){if("0"!==r&&"1"!==r)return!1;i=!0}return i}if("x"===r){for(n++;t>n;n++)if(r=e[n],"_"!==r){if(!isHexCode(e.charCodeAt(n)))return!1;i=!0}return i}for(;t>n;n++)if(r=e[n],"_"!==r){if(!isOctCode(e.charCodeAt(n)))return!1;i=!0}return i}for(;t>n;n++)if(r=e[n],"_"!==r){if(":"===r)break;if(!isDecCode(e.charCodeAt(n)))return!1;i=!0}return i?":"!==r?!0:/^(:[0-5]?[0-9])+$/.test(e.slice(n)):!1}function constructYamlInteger(e){var r,t,n=e,i=1,o=[];return-1!==n.indexOf("_")&&(n=n.replace(/_/g,"")),r=n[0],("-"===r||"+"===r)&&("-"===r&&(i=-1),n=n.slice(1),r=n[0]),"0"===n?0:"0"===r?"b"===n[1]?i*parseInt(n.slice(2),2):"x"===n[1]?i*parseInt(n,16):i*parseInt(n,8):-1!==n.indexOf(":")?(n.split(":").forEach(function(e){o.unshift(parseInt(e,10))}),n=0,t=1,o.forEach(function(e){n+=e*t,t*=60}),i*n):i*parseInt(n,10)}function isInteger(e){return"[object Number]"===Object.prototype.toString.call(e)&&0===e%1&&!common.isNegativeZero(e)}var common=require("../common"),Type=require("../type");module.exports=new Type("tag:yaml.org,2002:int",{kind:"scalar",resolve:resolveYamlInteger,construct:constructYamlInteger,predicate:isInteger,represent:{binary:function(e){return"0b"+e.toString(2)},octal:function(e){return"0"+e.toString(8)},decimal:function(e){return e.toString(10)},hexadecimal:function(e){return"0x"+e.toString(16).toUpperCase()}},defaultStyle:"decimal",styleAliases:{binary:[2,"bin"],octal:[8,"oct"],decimal:[10,"dec"],hexadecimal:[16,"hex"]}});
@@ -197,11 +202,11 @@ module.exports=Array.isArray||function(r){return"[object Array]"==Object.prototy
 },{"../common":36,"../type":47}],52:[function(require,module,exports){
 "use strict";function resolveJavascriptFunction(e){if(null===e)return!1;try{var r="("+e+")",n=esprima.parse(r,{range:!0});return"Program"!==n.type||1!==n.body.length||"ExpressionStatement"!==n.body[0].type||"FunctionExpression"!==n.body[0].expression.type?!1:!0}catch(t){return!1}}function constructJavascriptFunction(e){var r,n="("+e+")",t=esprima.parse(n,{range:!0}),o=[];if("Program"!==t.type||1!==t.body.length||"ExpressionStatement"!==t.body[0].type||"FunctionExpression"!==t.body[0].expression.type)throw new Error("Failed to resolve function");return t.body[0].expression.params.forEach(function(e){o.push(e.name)}),r=t.body[0].expression.body.range,new Function(o,n.slice(r[0]+1,r[1]-1))}function representJavascriptFunction(e){return e.toString()}function isFunction(e){return"[object Function]"===Object.prototype.toString.call(e)}var esprima;try{esprima=require("esprima")}catch(_){"undefined"!=typeof window&&(esprima=window.esprima)}var Type=require("../../type");module.exports=new Type("tag:yaml.org,2002:js/function",{kind:"scalar",resolve:resolveJavascriptFunction,construct:constructJavascriptFunction,predicate:isFunction,represent:representJavascriptFunction});
 
-},{"../../type":47,"esprima":24}],53:[function(require,module,exports){
+},{"../../type":47,"esprima":25}],53:[function(require,module,exports){
 "use strict";function resolveJavascriptRegExp(e){if(null===e)return!1;if(0===e.length)return!1;var r=e,t=/\/([gim]*)$/.exec(e),n="";if("/"===r[0]){if(t&&(n=t[1]),n.length>3)return!1;if("/"!==r[r.length-n.length-1])return!1;r=r.slice(1,r.length-n.length-1)}try{return!0}catch(i){return!1}}function constructJavascriptRegExp(e){var r=e,t=/\/([gim]*)$/.exec(e),n="";return"/"===r[0]&&(t&&(n=t[1]),r=r.slice(1,r.length-n.length-1)),new RegExp(r,n)}function representJavascriptRegExp(e){var r="/"+e.source+"/";return e.global&&(r+="g"),e.multiline&&(r+="m"),e.ignoreCase&&(r+="i"),r}function isRegExp(e){return"[object RegExp]"===Object.prototype.toString.call(e)}var Type=require("../../type");module.exports=new Type("tag:yaml.org,2002:js/regexp",{kind:"scalar",resolve:resolveJavascriptRegExp,construct:constructJavascriptRegExp,predicate:isRegExp,represent:representJavascriptRegExp});
 
 },{"../../type":47}],54:[function(require,module,exports){
-"use strict";function resolveJavascriptUndefined(){return!0}function constructJavascriptUndefined(){return void 0}function representJavascriptUndefined(){return""}function isUndefined(e){return"undefined"==typeof e}var Type=require("../../type");module.exports=new Type("tag:yaml.org,2002:js/undefined",{kind:"scalar",resolve:resolveJavascriptUndefined,construct:constructJavascriptUndefined,predicate:isUndefined,represent:representJavascriptUndefined});
+"use strict";function resolveJavascriptUndefined(){return!0}function constructJavascriptUndefined(){}function representJavascriptUndefined(){return""}function isUndefined(e){return"undefined"==typeof e}var Type=require("../../type");module.exports=new Type("tag:yaml.org,2002:js/undefined",{kind:"scalar",resolve:resolveJavascriptUndefined,construct:constructJavascriptUndefined,predicate:isUndefined,represent:representJavascriptUndefined});
 
 },{"../../type":47}],55:[function(require,module,exports){
 "use strict";var Type=require("../type");module.exports=new Type("tag:yaml.org,2002:map",{kind:"mapping",construct:function(e){return null!==e?e:{}}});
@@ -235,16 +240,16 @@ function parse(e){if(e=""+e,!(e.length>1e4)){var a=/^((?:\d+)?\.?\d+) *(millisec
 
 },{}],65:[function(require,module,exports){
 /**!
- * Ono v1.0.22
+ * Ono v2.0.1
  *
  * @link https://github.com/BigstickCarpet/ono
  * @license MIT
  */
-"use strict";function create(r){return function(e,t,o,a){var n,s,l=module.exports.formatter;"string"==typeof e?(n=l.apply(null,arguments),e=t=void 0):n="string"==typeof t?l.apply(null,slice.call(arguments,1)):l.apply(null,slice.call(arguments,2)),e instanceof Error||(t=e,e=void 0),e&&(n+=(n?" \n":"")+e.message,s=e.stack);var c=new r(n);return extendError(c,s,t),c}}function extendError(r,e,t){if(e&&(r.stack+=" \n\n"+e),t&&"object"==typeof t)for(var o=Object.keys(t),a=0;a<o.length;a++){var n=o[a];r[n]=t[n]}r.toJSON=errorToJSON}function errorToJSON(){var r={name:this.name,message:this.message},e=Object.keys(this);e=e.concat(["description","number","fileName","lineNumber","columnNumber","stack"]);for(var t=0;t<e.length;t++){var o=e[t],a=this[o];void 0!==a&&(r[o]=a)}return r}var util=require("util"),slice=Array.prototype.slice;module.exports=create(Error),module.exports.error=create(Error),module.exports.eval=create(EvalError),module.exports.range=create(RangeError),module.exports.reference=create(ReferenceError),module.exports.syntax=create(SyntaxError),module.exports.type=create(TypeError),module.exports.uri=create(URIError),module.exports.formatter=util.format;
+"use strict";function create(r){return function(e,t,o,n){var a,c=module.exports.formatter;"string"==typeof e?(a=c.apply(null,arguments),e=t=void 0):a="string"==typeof t?c.apply(null,slice.call(arguments,1)):c.apply(null,slice.call(arguments,2)),e instanceof Error||(t=e,e=void 0),e&&(a+=(a?" \n":"")+e.message);var i=new r(a);return extendError(i,e),extendToJSON(i),extend(i,t),i}}function extendError(r,e){if(e){var t=e.stack;t&&(r.stack+=" \n\n"+e.stack),extend(r,e,!0)}}function extendToJSON(r){r.toJSON=errorToJSON,r.inspect=errorToJSON}function extend(r,e,t){if(e&&"object"==typeof e)for(var o=Object.keys(e),n=0;n<o.length;n++){var a=o[n];if(!(t&&vendorSpecificErrorProperties.indexOf(a)>=0))try{r[a]=e[a]}catch(c){}}}function errorToJSON(){var r={},e=Object.keys(this);e=e.concat(vendorSpecificErrorProperties);for(var t=0;t<e.length;t++){var o=e[t],n=this[o];void 0!==n&&(r[o]=n)}return r}var util=require("util"),slice=Array.prototype.slice,vendorSpecificErrorProperties=["name","message","description","number","fileName","lineNumber","columnNumber","sourceURL","line","column","stack"];module.exports=create(Error),module.exports.error=create(Error),module.exports.eval=create(EvalError),module.exports.range=create(RangeError),module.exports.reference=create(ReferenceError),module.exports.syntax=create(SyntaxError),module.exports.type=create(TypeError),module.exports.uri=create(URIError),module.exports.formatter=util.format;
 
-},{"util":93}],66:[function(require,module,exports){
+},{"util":92}],66:[function(require,module,exports){
 (function (process){
-"use strict";function nextTick(n){for(var e=new Array(arguments.length-1),t=0;t<e.length;)e[t++]=arguments[t];process.nextTick(function(){n.apply(null,e)})}module.exports=nextTick;
+"use strict";function nextTick(e){for(var s=new Array(arguments.length-1),n=0;n<s.length;)s[n++]=arguments[n];process.nextTick(function(){e.apply(null,s)})}!process.version||0===process.version.indexOf("v0.")||0===process.version.indexOf("v1.")&&0!==process.version.indexOf("v1.8.")?module.exports=nextTick:module.exports=process.nextTick;
 
 }).call(this,require('_process'))
 
@@ -253,8 +258,8 @@ function cleanUpNextTick(){draining=!1,currentQueue.length?queue=currentQueue.co
 
 },{}],68:[function(require,module,exports){
 (function (global){
-/*! https://mths.be/punycode v1.3.2 by @mathias */
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+/*! https://mths.be/punycode v1.4.0 by @mathias */
+!function(e){function o(e){throw new RangeError(T[e])}function n(e,o){for(var n=e.length,r=[];n--;)r[n]=o(e[n]);return r}function r(e,o){var r=e.split("@"),t="";r.length>1&&(t=r[0]+"@",e=r[1]),e=e.replace(S,".");var u=e.split("."),i=n(u,o).join(".");return t+i}function t(e){for(var o,n,r=[],t=0,u=e.length;u>t;)o=e.charCodeAt(t++),o>=55296&&56319>=o&&u>t?(n=e.charCodeAt(t++),56320==(64512&n)?r.push(((1023&o)<<10)+(1023&n)+65536):(r.push(o),t--)):r.push(o);return r}function u(e){return n(e,function(e){var o="";return e>65535&&(e-=65536,o+=P(e>>>10&1023|55296),e=56320|1023&e),o+=P(e)}).join("")}function i(e){return 10>e-48?e-22:26>e-65?e-65:26>e-97?e-97:b}function f(e,o){return e+22+75*(26>e)-((0!=o)<<5)}function c(e,o,n){var r=0;for(e=n?M(e/j):e>>1,e+=M(e/o);e>L*C>>1;r+=b)e=M(e/L);return M(r+(L+1)*e/(e+m))}function l(e){var n,r,t,f,l,s,d,a,p,h,v=[],g=e.length,w=0,m=I,j=A;for(r=e.lastIndexOf(E),0>r&&(r=0),t=0;r>t;++t)e.charCodeAt(t)>=128&&o("not-basic"),v.push(e.charCodeAt(t));for(f=r>0?r+1:0;g>f;){for(l=w,s=1,d=b;f>=g&&o("invalid-input"),a=i(e.charCodeAt(f++)),(a>=b||a>M((x-w)/s))&&o("overflow"),w+=a*s,p=j>=d?y:d>=j+C?C:d-j,!(p>a);d+=b)h=b-p,s>M(x/h)&&o("overflow"),s*=h;n=v.length+1,j=c(w-l,n,0==l),M(w/n)>x-m&&o("overflow"),m+=M(w/n),w%=n,v.splice(w++,0,m)}return u(v)}function s(e){var n,r,u,i,l,s,d,a,p,h,v,g,w,m,j,F=[];for(e=t(e),g=e.length,n=I,r=0,l=A,s=0;g>s;++s)v=e[s],128>v&&F.push(P(v));for(u=i=F.length,i&&F.push(E);g>u;){for(d=x,s=0;g>s;++s)v=e[s],v>=n&&d>v&&(d=v);for(w=u+1,d-n>M((x-r)/w)&&o("overflow"),r+=(d-n)*w,n=d,s=0;g>s;++s)if(v=e[s],n>v&&++r>x&&o("overflow"),v==n){for(a=r,p=b;h=l>=p?y:p>=l+C?C:p-l,!(h>a);p+=b)j=a-h,m=b-h,F.push(P(f(h+j%m,0))),a=M(j/m);F.push(P(f(a,0))),l=c(r,w,u==i),r=0,++u}++r,++n}return F.join("")}function d(e){return r(e,function(e){return F.test(e)?l(e.slice(4).toLowerCase()):e})}function a(e){return r(e,function(e){return O.test(e)?"xn--"+s(e):e})}var p="object"==typeof exports&&exports&&!exports.nodeType&&exports,h="object"==typeof module&&module&&!module.nodeType&&module,v="object"==typeof global&&global;(v.global===v||v.window===v||v.self===v)&&(e=v);var g,w,x=2147483647,b=36,y=1,C=26,m=38,j=700,A=72,I=128,E="-",F=/^xn--/,O=/[^\x20-\x7E]/,S=/[\x2E\u3002\uFF0E\uFF61]/g,T={overflow:"Overflow: input needs wider integers to process","not-basic":"Illegal input >= 0x80 (not a basic code point)","invalid-input":"Invalid input"},L=b-y,M=Math.floor,P=String.fromCharCode;if(g={version:"1.3.2",ucs2:{decode:t,encode:u},decode:l,encode:s,toASCII:a,toUnicode:d},"function"==typeof define&&"object"==typeof define.amd&&define.amd)define("punycode",function(){return g});else if(p&&h)if(module.exports==p)h.exports=g;else for(w in g)g.hasOwnProperty(w)&&(p[w]=g[w]);else e.punycode=g}(this);
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
@@ -273,22 +278,22 @@ module.exports=require("./lib/_stream_duplex.js");
 },{"./lib/_stream_duplex.js":73}],73:[function(require,module,exports){
 "use strict";function Duplex(e){return this instanceof Duplex?(Readable.call(this,e),Writable.call(this,e),e&&e.readable===!1&&(this.readable=!1),e&&e.writable===!1&&(this.writable=!1),this.allowHalfOpen=!0,e&&e.allowHalfOpen===!1&&(this.allowHalfOpen=!1),void this.once("end",onend)):new Duplex(e)}function onend(){this.allowHalfOpen||this._writableState.ended||processNextTick(onEndNT,this)}function onEndNT(e){e.end()}function forEach(e,t){for(var r=0,i=e.length;i>r;r++)t(e[r],r)}var objectKeys=Object.keys||function(e){var t=[];for(var r in e)t.push(r);return t};module.exports=Duplex;var processNextTick=require("process-nextick-args"),util=require("core-util-is");util.inherits=require("inherits");var Readable=require("./_stream_readable"),Writable=require("./_stream_writable");util.inherits(Duplex,Readable);for(var keys=objectKeys(Writable.prototype),v=0;v<keys.length;v++){var method=keys[v];Duplex.prototype[method]||(Duplex.prototype[method]=Writable.prototype[method])}
 
-},{"./_stream_readable":75,"./_stream_writable":77,"core-util-is":20,"inherits":30,"process-nextick-args":66}],74:[function(require,module,exports){
+},{"./_stream_readable":75,"./_stream_writable":77,"core-util-is":21,"inherits":31,"process-nextick-args":66}],74:[function(require,module,exports){
 "use strict";function PassThrough(r){return this instanceof PassThrough?void Transform.call(this,r):new PassThrough(r)}module.exports=PassThrough;var Transform=require("./_stream_transform"),util=require("core-util-is");util.inherits=require("inherits"),util.inherits(PassThrough,Transform),PassThrough.prototype._transform=function(r,s,i){i(null,r)};
 
-},{"./_stream_transform":76,"core-util-is":20,"inherits":30}],75:[function(require,module,exports){
+},{"./_stream_transform":76,"core-util-is":21,"inherits":31}],75:[function(require,module,exports){
 (function (process){
-"use strict";function ReadableState(e,t){var r=require("./_stream_duplex");e=e||{},this.objectMode=!!e.objectMode,t instanceof r&&(this.objectMode=this.objectMode||!!e.readableObjectMode);var n=e.highWaterMark,a=this.objectMode?16:16384;this.highWaterMark=n||0===n?n:a,this.highWaterMark=~~this.highWaterMark,this.buffer=[],this.length=0,this.pipes=null,this.pipesCount=0,this.flowing=null,this.ended=!1,this.endEmitted=!1,this.reading=!1,this.sync=!0,this.needReadable=!1,this.emittedReadable=!1,this.readableListening=!1,this.defaultEncoding=e.defaultEncoding||"utf8",this.ranOut=!1,this.awaitDrain=0,this.readingMore=!1,this.decoder=null,this.encoding=null,e.encoding&&(StringDecoder||(StringDecoder=require("string_decoder/").StringDecoder),this.decoder=new StringDecoder(e.encoding),this.encoding=e.encoding)}function Readable(e){require("./_stream_duplex");return this instanceof Readable?(this._readableState=new ReadableState(e,this),this.readable=!0,e&&"function"==typeof e.read&&(this._read=e.read),void Stream.call(this)):new Readable(e)}function readableAddChunk(e,t,r,n,a){var i=chunkInvalid(t,r);if(i)e.emit("error",i);else if(null===r)t.reading=!1,onEofChunk(e,t);else if(t.objectMode||r&&r.length>0)if(t.ended&&!a){var d=new Error("stream.push() after EOF");e.emit("error",d)}else if(t.endEmitted&&a){var d=new Error("stream.unshift() after end event");e.emit("error",d)}else!t.decoder||a||n||(r=t.decoder.write(r)),a||(t.reading=!1),t.flowing&&0===t.length&&!t.sync?(e.emit("data",r),e.read(0)):(t.length+=t.objectMode?1:r.length,a?t.buffer.unshift(r):t.buffer.push(r),t.needReadable&&emitReadable(e)),maybeReadMore(e,t);else a||(t.reading=!1);return needMoreData(t)}function needMoreData(e){return!e.ended&&(e.needReadable||e.length<e.highWaterMark||0===e.length)}function computeNewHighWaterMark(e){return e>=MAX_HWM?e=MAX_HWM:(e--,e|=e>>>1,e|=e>>>2,e|=e>>>4,e|=e>>>8,e|=e>>>16,e++),e}function howMuchToRead(e,t){return 0===t.length&&t.ended?0:t.objectMode?0===e?0:1:null===e||isNaN(e)?t.flowing&&t.buffer.length?t.buffer[0].length:t.length:0>=e?0:(e>t.highWaterMark&&(t.highWaterMark=computeNewHighWaterMark(e)),e>t.length?t.ended?t.length:(t.needReadable=!0,0):e)}function chunkInvalid(e,t){var r=null;return Buffer.isBuffer(t)||"string"==typeof t||null===t||void 0===t||e.objectMode||(r=new TypeError("Invalid non-string/buffer chunk")),r}function onEofChunk(e,t){if(!t.ended){if(t.decoder){var r=t.decoder.end();r&&r.length&&(t.buffer.push(r),t.length+=t.objectMode?1:r.length)}t.ended=!0,emitReadable(e)}}function emitReadable(e){var t=e._readableState;t.needReadable=!1,t.emittedReadable||(debug("emitReadable",t.flowing),t.emittedReadable=!0,t.sync?processNextTick(emitReadable_,e):emitReadable_(e))}function emitReadable_(e){debug("emit readable"),e.emit("readable"),flow(e)}function maybeReadMore(e,t){t.readingMore||(t.readingMore=!0,processNextTick(maybeReadMore_,e,t))}function maybeReadMore_(e,t){for(var r=t.length;!t.reading&&!t.flowing&&!t.ended&&t.length<t.highWaterMark&&(debug("maybeReadMore read 0"),e.read(0),r!==t.length);)r=t.length;t.readingMore=!1}function pipeOnDrain(e){return function(){var t=e._readableState;debug("pipeOnDrain",t.awaitDrain),t.awaitDrain&&t.awaitDrain--,0===t.awaitDrain&&EElistenerCount(e,"data")&&(t.flowing=!0,flow(e))}}function nReadingNextTick(e){debug("readable nexttick read 0"),e.read(0)}function resume(e,t){t.resumeScheduled||(t.resumeScheduled=!0,processNextTick(resume_,e,t))}function resume_(e,t){t.reading||(debug("resume read 0"),e.read(0)),t.resumeScheduled=!1,e.emit("resume"),flow(e),t.flowing&&!t.reading&&e.read(0)}function flow(e){var t=e._readableState;if(debug("flow",t.flowing),t.flowing)do var r=e.read();while(null!==r&&t.flowing)}function fromList(e,t){var r,n=t.buffer,a=t.length,i=!!t.decoder,d=!!t.objectMode;if(0===n.length)return null;if(0===a)r=null;else if(d)r=n.shift();else if(!e||e>=a)r=i?n.join(""):1===n.length?n[0]:Buffer.concat(n,a),n.length=0;else if(e<n[0].length){var o=n[0];r=o.slice(0,e),n[0]=o.slice(e)}else if(e===n[0].length)r=n.shift();else{r=i?"":new Buffer(e);for(var l=0,u=0,s=n.length;s>u&&e>l;u++){var o=n[0],h=Math.min(e-l,o.length);i?r+=o.slice(0,h):o.copy(r,l,0,h),h<o.length?n[0]=o.slice(h):n.shift(),l+=h}}return r}function endReadable(e){var t=e._readableState;if(t.length>0)throw new Error("endReadable called on non-empty stream");t.endEmitted||(t.ended=!0,processNextTick(endReadableNT,t,e))}function endReadableNT(e,t){e.endEmitted||0!==e.length||(e.endEmitted=!0,t.readable=!1,t.emit("end"))}function forEach(e,t){for(var r=0,n=e.length;n>r;r++)t(e[r],r)}function indexOf(e,t){for(var r=0,n=e.length;n>r;r++)if(e[r]===t)return r;return-1}module.exports=Readable;var processNextTick=require("process-nextick-args"),isArray=require("isarray"),Buffer=require("buffer").Buffer;Readable.ReadableState=ReadableState;var EE=require("events"),EElistenerCount=function(e,t){return e.listeners(t).length},Stream;!function(){try{Stream=require("stream")}catch(e){}finally{Stream||(Stream=require("events").EventEmitter)}}();var Buffer=require("buffer").Buffer,util=require("core-util-is");util.inherits=require("inherits");var debugUtil=require("util"),debug;debug=debugUtil&&debugUtil.debuglog?debugUtil.debuglog("stream"):function(){};var StringDecoder;util.inherits(Readable,Stream),Readable.prototype.push=function(e,t){var r=this._readableState;return r.objectMode||"string"!=typeof e||(t=t||r.defaultEncoding,t!==r.encoding&&(e=new Buffer(e,t),t="")),readableAddChunk(this,r,e,t,!1)},Readable.prototype.unshift=function(e){var t=this._readableState;return readableAddChunk(this,t,e,"",!0)},Readable.prototype.isPaused=function(){return this._readableState.flowing===!1},Readable.prototype.setEncoding=function(e){return StringDecoder||(StringDecoder=require("string_decoder/").StringDecoder),this._readableState.decoder=new StringDecoder(e),this._readableState.encoding=e,this};var MAX_HWM=8388608;Readable.prototype.read=function(e){debug("read",e);var t=this._readableState,r=e;if(("number"!=typeof e||e>0)&&(t.emittedReadable=!1),0===e&&t.needReadable&&(t.length>=t.highWaterMark||t.ended))return debug("read: emitReadable",t.length,t.ended),0===t.length&&t.ended?endReadable(this):emitReadable(this),null;if(e=howMuchToRead(e,t),0===e&&t.ended)return 0===t.length&&endReadable(this),null;var n=t.needReadable;debug("need readable",n),(0===t.length||t.length-e<t.highWaterMark)&&(n=!0,debug("length less than watermark",n)),(t.ended||t.reading)&&(n=!1,debug("reading or ended",n)),n&&(debug("do read"),t.reading=!0,t.sync=!0,0===t.length&&(t.needReadable=!0),this._read(t.highWaterMark),t.sync=!1),n&&!t.reading&&(e=howMuchToRead(r,t));var a;return a=e>0?fromList(e,t):null,null===a&&(t.needReadable=!0,e=0),t.length-=e,0!==t.length||t.ended||(t.needReadable=!0),r!==e&&t.ended&&0===t.length&&endReadable(this),null!==a&&this.emit("data",a),a},Readable.prototype._read=function(e){this.emit("error",new Error("not implemented"))},Readable.prototype.pipe=function(e,t){function r(e){debug("onunpipe"),e===s&&a()}function n(){debug("onend"),e.end()}function a(){debug("cleanup"),e.removeListener("close",o),e.removeListener("finish",l),e.removeListener("drain",g),e.removeListener("error",d),e.removeListener("unpipe",r),s.removeListener("end",n),s.removeListener("end",a),s.removeListener("data",i),p=!0,!h.awaitDrain||e._writableState&&!e._writableState.needDrain||g()}function i(t){debug("ondata");var r=e.write(t);!1===r&&(1!==h.pipesCount||h.pipes[0]!==e||1!==s.listenerCount("data")||p||(debug("false write response, pause",s._readableState.awaitDrain),s._readableState.awaitDrain++),s.pause())}function d(t){debug("onerror",t),u(),e.removeListener("error",d),0===EElistenerCount(e,"error")&&e.emit("error",t)}function o(){e.removeListener("finish",l),u()}function l(){debug("onfinish"),e.removeListener("close",o),u()}function u(){debug("unpipe"),s.unpipe(e)}var s=this,h=this._readableState;switch(h.pipesCount){case 0:h.pipes=e;break;case 1:h.pipes=[h.pipes,e];break;default:h.pipes.push(e)}h.pipesCount+=1,debug("pipe count=%d opts=%j",h.pipesCount,t);var f=(!t||t.end!==!1)&&e!==process.stdout&&e!==process.stderr,c=f?n:a;h.endEmitted?processNextTick(c):s.once("end",c),e.on("unpipe",r);var g=pipeOnDrain(s);e.on("drain",g);var p=!1;return s.on("data",i),e._events&&e._events.error?isArray(e._events.error)?e._events.error.unshift(d):e._events.error=[d,e._events.error]:e.on("error",d),e.once("close",o),e.once("finish",l),e.emit("pipe",s),h.flowing||(debug("pipe resume"),s.resume()),e},Readable.prototype.unpipe=function(e){var t=this._readableState;if(0===t.pipesCount)return this;if(1===t.pipesCount)return e&&e!==t.pipes?this:(e||(e=t.pipes),t.pipes=null,t.pipesCount=0,t.flowing=!1,e&&e.emit("unpipe",this),this);if(!e){var r=t.pipes,n=t.pipesCount;t.pipes=null,t.pipesCount=0,t.flowing=!1;for(var a=0;n>a;a++)r[a].emit("unpipe",this);return this}var a=indexOf(t.pipes,e);return-1===a?this:(t.pipes.splice(a,1),t.pipesCount-=1,1===t.pipesCount&&(t.pipes=t.pipes[0]),e.emit("unpipe",this),this)},Readable.prototype.on=function(e,t){var r=Stream.prototype.on.call(this,e,t);if("data"===e&&!1!==this._readableState.flowing&&this.resume(),"readable"===e&&this.readable){var n=this._readableState;n.readableListening||(n.readableListening=!0,n.emittedReadable=!1,n.needReadable=!0,n.reading?n.length&&emitReadable(this,n):processNextTick(nReadingNextTick,this))}return r},Readable.prototype.addListener=Readable.prototype.on,Readable.prototype.resume=function(){var e=this._readableState;return e.flowing||(debug("resume"),e.flowing=!0,resume(this,e)),this},Readable.prototype.pause=function(){return debug("call pause flowing=%j",this._readableState.flowing),!1!==this._readableState.flowing&&(debug("pause"),this._readableState.flowing=!1,this.emit("pause")),this},Readable.prototype.wrap=function(e){var t=this._readableState,r=!1,n=this;e.on("end",function(){if(debug("wrapped end"),t.decoder&&!t.ended){var e=t.decoder.end();e&&e.length&&n.push(e)}n.push(null)}),e.on("data",function(a){if(debug("wrapped data"),t.decoder&&(a=t.decoder.write(a)),(!t.objectMode||null!==a&&void 0!==a)&&(t.objectMode||a&&a.length)){var i=n.push(a);i||(r=!0,e.pause())}});for(var a in e)void 0===this[a]&&"function"==typeof e[a]&&(this[a]=function(t){return function(){return e[t].apply(e,arguments)}}(a));var i=["error","close","destroy","pause","resume"];return forEach(i,function(t){e.on(t,n.emit.bind(n,t))}),n._read=function(t){debug("wrapped _read",t),r&&(r=!1,e.resume())},n},Readable._fromList=fromList;
+"use strict";function ReadableState(e,t){Duplex=Duplex||require("./_stream_duplex"),e=e||{},this.objectMode=!!e.objectMode,t instanceof Duplex&&(this.objectMode=this.objectMode||!!e.readableObjectMode);var r=e.highWaterMark,n=this.objectMode?16:16384;this.highWaterMark=r||0===r?r:n,this.highWaterMark=~~this.highWaterMark,this.buffer=[],this.length=0,this.pipes=null,this.pipesCount=0,this.flowing=null,this.ended=!1,this.endEmitted=!1,this.reading=!1,this.sync=!0,this.needReadable=!1,this.emittedReadable=!1,this.readableListening=!1,this.defaultEncoding=e.defaultEncoding||"utf8",this.ranOut=!1,this.awaitDrain=0,this.readingMore=!1,this.decoder=null,this.encoding=null,e.encoding&&(StringDecoder||(StringDecoder=require("string_decoder/").StringDecoder),this.decoder=new StringDecoder(e.encoding),this.encoding=e.encoding)}function Readable(e){return Duplex=Duplex||require("./_stream_duplex"),this instanceof Readable?(this._readableState=new ReadableState(e,this),this.readable=!0,e&&"function"==typeof e.read&&(this._read=e.read),void Stream.call(this)):new Readable(e)}function readableAddChunk(e,t,r,n,a){var i=chunkInvalid(t,r);if(i)e.emit("error",i);else if(null===r)t.reading=!1,onEofChunk(e,t);else if(t.objectMode||r&&r.length>0)if(t.ended&&!a){var d=new Error("stream.push() after EOF");e.emit("error",d)}else if(t.endEmitted&&a){var d=new Error("stream.unshift() after end event");e.emit("error",d)}else!t.decoder||a||n||(r=t.decoder.write(r)),a||(t.reading=!1),t.flowing&&0===t.length&&!t.sync?(e.emit("data",r),e.read(0)):(t.length+=t.objectMode?1:r.length,a?t.buffer.unshift(r):t.buffer.push(r),t.needReadable&&emitReadable(e)),maybeReadMore(e,t);else a||(t.reading=!1);return needMoreData(t)}function needMoreData(e){return!e.ended&&(e.needReadable||e.length<e.highWaterMark||0===e.length)}function computeNewHighWaterMark(e){return e>=MAX_HWM?e=MAX_HWM:(e--,e|=e>>>1,e|=e>>>2,e|=e>>>4,e|=e>>>8,e|=e>>>16,e++),e}function howMuchToRead(e,t){return 0===t.length&&t.ended?0:t.objectMode?0===e?0:1:null===e||isNaN(e)?t.flowing&&t.buffer.length?t.buffer[0].length:t.length:0>=e?0:(e>t.highWaterMark&&(t.highWaterMark=computeNewHighWaterMark(e)),e>t.length?t.ended?t.length:(t.needReadable=!0,0):e)}function chunkInvalid(e,t){var r=null;return Buffer.isBuffer(t)||"string"==typeof t||null===t||void 0===t||e.objectMode||(r=new TypeError("Invalid non-string/buffer chunk")),r}function onEofChunk(e,t){if(!t.ended){if(t.decoder){var r=t.decoder.end();r&&r.length&&(t.buffer.push(r),t.length+=t.objectMode?1:r.length)}t.ended=!0,emitReadable(e)}}function emitReadable(e){var t=e._readableState;t.needReadable=!1,t.emittedReadable||(debug("emitReadable",t.flowing),t.emittedReadable=!0,t.sync?processNextTick(emitReadable_,e):emitReadable_(e))}function emitReadable_(e){debug("emit readable"),e.emit("readable"),flow(e)}function maybeReadMore(e,t){t.readingMore||(t.readingMore=!0,processNextTick(maybeReadMore_,e,t))}function maybeReadMore_(e,t){for(var r=t.length;!t.reading&&!t.flowing&&!t.ended&&t.length<t.highWaterMark&&(debug("maybeReadMore read 0"),e.read(0),r!==t.length);)r=t.length;t.readingMore=!1}function pipeOnDrain(e){return function(){var t=e._readableState;debug("pipeOnDrain",t.awaitDrain),t.awaitDrain&&t.awaitDrain--,0===t.awaitDrain&&EElistenerCount(e,"data")&&(t.flowing=!0,flow(e))}}function nReadingNextTick(e){debug("readable nexttick read 0"),e.read(0)}function resume(e,t){t.resumeScheduled||(t.resumeScheduled=!0,processNextTick(resume_,e,t))}function resume_(e,t){t.reading||(debug("resume read 0"),e.read(0)),t.resumeScheduled=!1,e.emit("resume"),flow(e),t.flowing&&!t.reading&&e.read(0)}function flow(e){var t=e._readableState;if(debug("flow",t.flowing),t.flowing)do var r=e.read();while(null!==r&&t.flowing)}function fromList(e,t){var r,n=t.buffer,a=t.length,i=!!t.decoder,d=!!t.objectMode;if(0===n.length)return null;if(0===a)r=null;else if(d)r=n.shift();else if(!e||e>=a)r=i?n.join(""):1===n.length?n[0]:Buffer.concat(n,a),n.length=0;else if(e<n[0].length){var o=n[0];r=o.slice(0,e),n[0]=o.slice(e)}else if(e===n[0].length)r=n.shift();else{r=i?"":new Buffer(e);for(var l=0,u=0,s=n.length;s>u&&e>l;u++){var o=n[0],h=Math.min(e-l,o.length);i?r+=o.slice(0,h):o.copy(r,l,0,h),h<o.length?n[0]=o.slice(h):n.shift(),l+=h}}return r}function endReadable(e){var t=e._readableState;if(t.length>0)throw new Error("endReadable called on non-empty stream");t.endEmitted||(t.ended=!0,processNextTick(endReadableNT,t,e))}function endReadableNT(e,t){e.endEmitted||0!==e.length||(e.endEmitted=!0,t.readable=!1,t.emit("end"))}function forEach(e,t){for(var r=0,n=e.length;n>r;r++)t(e[r],r)}function indexOf(e,t){for(var r=0,n=e.length;n>r;r++)if(e[r]===t)return r;return-1}module.exports=Readable;var processNextTick=require("process-nextick-args"),isArray=require("isarray"),Buffer=require("buffer").Buffer;Readable.ReadableState=ReadableState;var EE=require("events"),EElistenerCount=function(e,t){return e.listeners(t).length},Stream;!function(){try{Stream=require("stream")}catch(e){}finally{Stream||(Stream=require("events").EventEmitter)}}();var Buffer=require("buffer").Buffer,util=require("core-util-is");util.inherits=require("inherits");var debugUtil=require("util"),debug;debug=debugUtil&&debugUtil.debuglog?debugUtil.debuglog("stream"):function(){};var StringDecoder;util.inherits(Readable,Stream);var Duplex,Duplex;Readable.prototype.push=function(e,t){var r=this._readableState;return r.objectMode||"string"!=typeof e||(t=t||r.defaultEncoding,t!==r.encoding&&(e=new Buffer(e,t),t="")),readableAddChunk(this,r,e,t,!1)},Readable.prototype.unshift=function(e){var t=this._readableState;return readableAddChunk(this,t,e,"",!0)},Readable.prototype.isPaused=function(){return this._readableState.flowing===!1},Readable.prototype.setEncoding=function(e){return StringDecoder||(StringDecoder=require("string_decoder/").StringDecoder),this._readableState.decoder=new StringDecoder(e),this._readableState.encoding=e,this};var MAX_HWM=8388608;Readable.prototype.read=function(e){debug("read",e);var t=this._readableState,r=e;if(("number"!=typeof e||e>0)&&(t.emittedReadable=!1),0===e&&t.needReadable&&(t.length>=t.highWaterMark||t.ended))return debug("read: emitReadable",t.length,t.ended),0===t.length&&t.ended?endReadable(this):emitReadable(this),null;if(e=howMuchToRead(e,t),0===e&&t.ended)return 0===t.length&&endReadable(this),null;var n=t.needReadable;debug("need readable",n),(0===t.length||t.length-e<t.highWaterMark)&&(n=!0,debug("length less than watermark",n)),(t.ended||t.reading)&&(n=!1,debug("reading or ended",n)),n&&(debug("do read"),t.reading=!0,t.sync=!0,0===t.length&&(t.needReadable=!0),this._read(t.highWaterMark),t.sync=!1),n&&!t.reading&&(e=howMuchToRead(r,t));var a;return a=e>0?fromList(e,t):null,null===a&&(t.needReadable=!0,e=0),t.length-=e,0!==t.length||t.ended||(t.needReadable=!0),r!==e&&t.ended&&0===t.length&&endReadable(this),null!==a&&this.emit("data",a),a},Readable.prototype._read=function(e){this.emit("error",new Error("not implemented"))},Readable.prototype.pipe=function(e,t){function r(e){debug("onunpipe"),e===s&&a()}function n(){debug("onend"),e.end()}function a(){debug("cleanup"),e.removeListener("close",o),e.removeListener("finish",l),e.removeListener("drain",c),e.removeListener("error",d),e.removeListener("unpipe",r),s.removeListener("end",n),s.removeListener("end",a),s.removeListener("data",i),g=!0,!h.awaitDrain||e._writableState&&!e._writableState.needDrain||c()}function i(t){debug("ondata");var r=e.write(t);!1===r&&(1!==h.pipesCount||h.pipes[0]!==e||1!==s.listenerCount("data")||g||(debug("false write response, pause",s._readableState.awaitDrain),s._readableState.awaitDrain++),s.pause())}function d(t){debug("onerror",t),u(),e.removeListener("error",d),0===EElistenerCount(e,"error")&&e.emit("error",t)}function o(){e.removeListener("finish",l),u()}function l(){debug("onfinish"),e.removeListener("close",o),u()}function u(){debug("unpipe"),s.unpipe(e)}var s=this,h=this._readableState;switch(h.pipesCount){case 0:h.pipes=e;break;case 1:h.pipes=[h.pipes,e];break;default:h.pipes.push(e)}h.pipesCount+=1,debug("pipe count=%d opts=%j",h.pipesCount,t);var f=(!t||t.end!==!1)&&e!==process.stdout&&e!==process.stderr,p=f?n:a;h.endEmitted?processNextTick(p):s.once("end",p),e.on("unpipe",r);var c=pipeOnDrain(s);e.on("drain",c);var g=!1;return s.on("data",i),e._events&&e._events.error?isArray(e._events.error)?e._events.error.unshift(d):e._events.error=[d,e._events.error]:e.on("error",d),e.once("close",o),e.once("finish",l),e.emit("pipe",s),h.flowing||(debug("pipe resume"),s.resume()),e},Readable.prototype.unpipe=function(e){var t=this._readableState;if(0===t.pipesCount)return this;if(1===t.pipesCount)return e&&e!==t.pipes?this:(e||(e=t.pipes),t.pipes=null,t.pipesCount=0,t.flowing=!1,e&&e.emit("unpipe",this),this);if(!e){var r=t.pipes,n=t.pipesCount;t.pipes=null,t.pipesCount=0,t.flowing=!1;for(var a=0;n>a;a++)r[a].emit("unpipe",this);return this}var a=indexOf(t.pipes,e);return-1===a?this:(t.pipes.splice(a,1),t.pipesCount-=1,1===t.pipesCount&&(t.pipes=t.pipes[0]),e.emit("unpipe",this),this)},Readable.prototype.on=function(e,t){var r=Stream.prototype.on.call(this,e,t);if("data"===e&&!1!==this._readableState.flowing&&this.resume(),"readable"===e&&this.readable){var n=this._readableState;n.readableListening||(n.readableListening=!0,n.emittedReadable=!1,n.needReadable=!0,n.reading?n.length&&emitReadable(this,n):processNextTick(nReadingNextTick,this))}return r},Readable.prototype.addListener=Readable.prototype.on,Readable.prototype.resume=function(){var e=this._readableState;return e.flowing||(debug("resume"),e.flowing=!0,resume(this,e)),this},Readable.prototype.pause=function(){return debug("call pause flowing=%j",this._readableState.flowing),!1!==this._readableState.flowing&&(debug("pause"),this._readableState.flowing=!1,this.emit("pause")),this},Readable.prototype.wrap=function(e){var t=this._readableState,r=!1,n=this;e.on("end",function(){if(debug("wrapped end"),t.decoder&&!t.ended){var e=t.decoder.end();e&&e.length&&n.push(e)}n.push(null)}),e.on("data",function(a){if(debug("wrapped data"),t.decoder&&(a=t.decoder.write(a)),(!t.objectMode||null!==a&&void 0!==a)&&(t.objectMode||a&&a.length)){var i=n.push(a);i||(r=!0,e.pause())}});for(var a in e)void 0===this[a]&&"function"==typeof e[a]&&(this[a]=function(t){return function(){return e[t].apply(e,arguments)}}(a));var i=["error","close","destroy","pause","resume"];return forEach(i,function(t){e.on(t,n.emit.bind(n,t))}),n._read=function(t){debug("wrapped _read",t),r&&(r=!1,e.resume())},n},Readable._fromList=fromList;
 
 }).call(this,require('_process'))
 
-},{"./_stream_duplex":73,"_process":67,"buffer":17,"core-util-is":20,"events":25,"inherits":30,"isarray":33,"process-nextick-args":66,"stream":82,"string_decoder/":89,"util":15}],76:[function(require,module,exports){
+},{"./_stream_duplex":73,"_process":67,"buffer":17,"core-util-is":21,"events":26,"inherits":31,"isarray":33,"process-nextick-args":66,"stream":82,"string_decoder/":87,"util":15}],76:[function(require,module,exports){
 "use strict";function TransformState(r){this.afterTransform=function(t,n){return afterTransform(r,t,n)},this.needTransform=!1,this.transforming=!1,this.writecb=null,this.writechunk=null}function afterTransform(r,t,n){var e=r._transformState;e.transforming=!1;var a=e.writecb;if(!a)return r.emit("error",new Error("no writecb in Transform class"));e.writechunk=null,e.writecb=null,null!==n&&void 0!==n&&r.push(n),a&&a(t);var i=r._readableState;i.reading=!1,(i.needReadable||i.length<i.highWaterMark)&&r._read(i.highWaterMark)}function Transform(r){if(!(this instanceof Transform))return new Transform(r);Duplex.call(this,r),this._transformState=new TransformState(this);var t=this;this._readableState.needReadable=!0,this._readableState.sync=!1,r&&("function"==typeof r.transform&&(this._transform=r.transform),"function"==typeof r.flush&&(this._flush=r.flush)),this.once("prefinish",function(){"function"==typeof this._flush?this._flush(function(r){done(t,r)}):done(t)})}function done(r,t){if(t)return r.emit("error",t);var n=r._writableState,e=r._transformState;if(n.length)throw new Error("calling transform done when ws.length != 0");if(e.transforming)throw new Error("calling transform done when still transforming");return r.push(null)}module.exports=Transform;var Duplex=require("./_stream_duplex"),util=require("core-util-is");util.inherits=require("inherits"),util.inherits(Transform,Duplex),Transform.prototype.push=function(r,t){return this._transformState.needTransform=!1,Duplex.prototype.push.call(this,r,t)},Transform.prototype._transform=function(r,t,n){throw new Error("not implemented")},Transform.prototype._write=function(r,t,n){var e=this._transformState;if(e.writecb=n,e.writechunk=r,e.writeencoding=t,!e.transforming){var a=this._readableState;(e.needTransform||a.needReadable||a.length<a.highWaterMark)&&this._read(a.highWaterMark)}},Transform.prototype._read=function(r){var t=this._transformState;null!==t.writechunk&&t.writecb&&!t.transforming?(t.transforming=!0,this._transform(t.writechunk,t.writeencoding,t.afterTransform)):t.needTransform=!0};
 
-},{"./_stream_duplex":73,"core-util-is":20,"inherits":30}],77:[function(require,module,exports){
-"use strict";function nop(){}function WriteReq(e,t,r){this.chunk=e,this.encoding=t,this.callback=r,this.next=null}function WritableState(e,t){var r=require("./_stream_duplex");e=e||{},this.objectMode=!!e.objectMode,t instanceof r&&(this.objectMode=this.objectMode||!!e.writableObjectMode);var i=e.highWaterMark,n=this.objectMode?16:16384;this.highWaterMark=i||0===i?i:n,this.highWaterMark=~~this.highWaterMark,this.needDrain=!1,this.ending=!1,this.ended=!1,this.finished=!1;var f=e.decodeStrings===!1;this.decodeStrings=!f,this.defaultEncoding=e.defaultEncoding||"utf8",this.length=0,this.writing=!1,this.corked=0,this.sync=!0,this.bufferProcessing=!1,this.onwrite=function(e){onwrite(t,e)},this.writecb=null,this.writelen=0,this.bufferedRequest=null,this.lastBufferedRequest=null,this.pendingcb=0,this.prefinished=!1,this.errorEmitted=!1}function Writable(e){var t=require("./_stream_duplex");return this instanceof Writable||this instanceof t?(this._writableState=new WritableState(e,this),this.writable=!0,e&&("function"==typeof e.write&&(this._write=e.write),"function"==typeof e.writev&&(this._writev=e.writev)),void Stream.call(this)):new Writable(e)}function writeAfterEnd(e,t){var r=new Error("write after end");e.emit("error",r),processNextTick(t,r)}function validChunk(e,t,r,i){var n=!0;if(!Buffer.isBuffer(r)&&"string"!=typeof r&&null!==r&&void 0!==r&&!t.objectMode){var f=new TypeError("Invalid non-string/buffer chunk");e.emit("error",f),processNextTick(i,f),n=!1}return n}function decodeChunk(e,t,r){return e.objectMode||e.decodeStrings===!1||"string"!=typeof t||(t=new Buffer(t,r)),t}function writeOrBuffer(e,t,r,i,n){r=decodeChunk(t,r,i),Buffer.isBuffer(r)&&(i="buffer");var f=t.objectMode?1:r.length;t.length+=f;var o=t.length<t.highWaterMark;if(o||(t.needDrain=!0),t.writing||t.corked){var u=t.lastBufferedRequest;t.lastBufferedRequest=new WriteReq(r,i,n),u?u.next=t.lastBufferedRequest:t.bufferedRequest=t.lastBufferedRequest}else doWrite(e,t,!1,f,r,i,n);return o}function doWrite(e,t,r,i,n,f,o){t.writelen=i,t.writecb=o,t.writing=!0,t.sync=!0,r?e._writev(n,t.onwrite):e._write(n,f,t.onwrite),t.sync=!1}function onwriteError(e,t,r,i,n){--t.pendingcb,r?processNextTick(n,i):n(i),e._writableState.errorEmitted=!0,e.emit("error",i)}function onwriteStateUpdate(e){e.writing=!1,e.writecb=null,e.length-=e.writelen,e.writelen=0}function onwrite(e,t){var r=e._writableState,i=r.sync,n=r.writecb;if(onwriteStateUpdate(r),t)onwriteError(e,r,i,t,n);else{var f=needFinish(r);f||r.corked||r.bufferProcessing||!r.bufferedRequest||clearBuffer(e,r),i?processNextTick(afterWrite,e,r,f,n):afterWrite(e,r,f,n)}}function afterWrite(e,t,r,i){r||onwriteDrain(e,t),t.pendingcb--,i(),finishMaybe(e,t)}function onwriteDrain(e,t){0===t.length&&t.needDrain&&(t.needDrain=!1,e.emit("drain"))}function clearBuffer(e,t){t.bufferProcessing=!0;var r=t.bufferedRequest;if(e._writev&&r&&r.next){for(var i=[],n=[];r;)n.push(r.callback),i.push(r),r=r.next;t.pendingcb++,t.lastBufferedRequest=null,doWrite(e,t,!0,t.length,i,"",function(e){for(var r=0;r<n.length;r++)t.pendingcb--,n[r](e)})}else{for(;r;){var f=r.chunk,o=r.encoding,u=r.callback,s=t.objectMode?1:f.length;if(doWrite(e,t,!1,s,f,o,u),r=r.next,t.writing)break}null===r&&(t.lastBufferedRequest=null)}t.bufferedRequest=r,t.bufferProcessing=!1}function needFinish(e){return e.ending&&0===e.length&&null===e.bufferedRequest&&!e.finished&&!e.writing}function prefinish(e,t){t.prefinished||(t.prefinished=!0,e.emit("prefinish"))}function finishMaybe(e,t){var r=needFinish(t);return r&&(0===t.pendingcb?(prefinish(e,t),t.finished=!0,e.emit("finish")):prefinish(e,t)),r}function endWritable(e,t,r){t.ending=!0,finishMaybe(e,t),r&&(t.finished?processNextTick(r):e.once("finish",r)),t.ended=!0}module.exports=Writable;var processNextTick=require("process-nextick-args"),Buffer=require("buffer").Buffer;Writable.WritableState=WritableState;var util=require("core-util-is");util.inherits=require("inherits");var internalUtil={deprecate:require("util-deprecate")},Stream;!function(){try{Stream=require("stream")}catch(e){}finally{Stream||(Stream=require("events").EventEmitter)}}();var Buffer=require("buffer").Buffer;util.inherits(Writable,Stream),WritableState.prototype.getBuffer=function(){for(var e=this.bufferedRequest,t=[];e;)t.push(e),e=e.next;return t},function(){try{Object.defineProperty(WritableState.prototype,"buffer",{get:internalUtil.deprecate(function(){return this.getBuffer()},"_writableState.buffer is deprecated. Use _writableState.getBuffer instead.")})}catch(e){}}(),Writable.prototype.pipe=function(){this.emit("error",new Error("Cannot pipe. Not readable."))},Writable.prototype.write=function(e,t,r){var i=this._writableState,n=!1;return"function"==typeof t&&(r=t,t=null),Buffer.isBuffer(e)?t="buffer":t||(t=i.defaultEncoding),"function"!=typeof r&&(r=nop),i.ended?writeAfterEnd(this,r):validChunk(this,i,e,r)&&(i.pendingcb++,n=writeOrBuffer(this,i,e,t,r)),n},Writable.prototype.cork=function(){var e=this._writableState;e.corked++},Writable.prototype.uncork=function(){var e=this._writableState;e.corked&&(e.corked--,e.writing||e.corked||e.finished||e.bufferProcessing||!e.bufferedRequest||clearBuffer(this,e))},Writable.prototype.setDefaultEncoding=function(e){if("string"==typeof e&&(e=e.toLowerCase()),!(["hex","utf8","utf-8","ascii","binary","base64","ucs2","ucs-2","utf16le","utf-16le","raw"].indexOf((e+"").toLowerCase())>-1))throw new TypeError("Unknown encoding: "+e);this._writableState.defaultEncoding=e},Writable.prototype._write=function(e,t,r){r(new Error("not implemented"))},Writable.prototype._writev=null,Writable.prototype.end=function(e,t,r){var i=this._writableState;"function"==typeof e?(r=e,e=null,t=null):"function"==typeof t&&(r=t,t=null),null!==e&&void 0!==e&&this.write(e,t),i.corked&&(i.corked=1,this.uncork()),i.ending||i.finished||endWritable(this,i,r)};
+},{"./_stream_duplex":73,"core-util-is":21,"inherits":31}],77:[function(require,module,exports){
+"use strict";function nop(){}function WriteReq(e,t,r){this.chunk=e,this.encoding=t,this.callback=r,this.next=null}function WritableState(e,t){Duplex=Duplex||require("./_stream_duplex"),e=e||{},this.objectMode=!!e.objectMode,t instanceof Duplex&&(this.objectMode=this.objectMode||!!e.writableObjectMode);var r=e.highWaterMark,i=this.objectMode?16:16384;this.highWaterMark=r||0===r?r:i,this.highWaterMark=~~this.highWaterMark,this.needDrain=!1,this.ending=!1,this.ended=!1,this.finished=!1;var n=e.decodeStrings===!1;this.decodeStrings=!n,this.defaultEncoding=e.defaultEncoding||"utf8",this.length=0,this.writing=!1,this.corked=0,this.sync=!0,this.bufferProcessing=!1,this.onwrite=function(e){onwrite(t,e)},this.writecb=null,this.writelen=0,this.bufferedRequest=null,this.lastBufferedRequest=null,this.pendingcb=0,this.prefinished=!1,this.errorEmitted=!1}function Writable(e){return Duplex=Duplex||require("./_stream_duplex"),this instanceof Writable||this instanceof Duplex?(this._writableState=new WritableState(e,this),this.writable=!0,e&&("function"==typeof e.write&&(this._write=e.write),"function"==typeof e.writev&&(this._writev=e.writev)),void Stream.call(this)):new Writable(e)}function writeAfterEnd(e,t){var r=new Error("write after end");e.emit("error",r),processNextTick(t,r)}function validChunk(e,t,r,i){var n=!0;if(!Buffer.isBuffer(r)&&"string"!=typeof r&&null!==r&&void 0!==r&&!t.objectMode){var f=new TypeError("Invalid non-string/buffer chunk");e.emit("error",f),processNextTick(i,f),n=!1}return n}function decodeChunk(e,t,r){return e.objectMode||e.decodeStrings===!1||"string"!=typeof t||(t=new Buffer(t,r)),t}function writeOrBuffer(e,t,r,i,n){r=decodeChunk(t,r,i),Buffer.isBuffer(r)&&(i="buffer");var f=t.objectMode?1:r.length;t.length+=f;var o=t.length<t.highWaterMark;if(o||(t.needDrain=!0),t.writing||t.corked){var u=t.lastBufferedRequest;t.lastBufferedRequest=new WriteReq(r,i,n),u?u.next=t.lastBufferedRequest:t.bufferedRequest=t.lastBufferedRequest}else doWrite(e,t,!1,f,r,i,n);return o}function doWrite(e,t,r,i,n,f,o){t.writelen=i,t.writecb=o,t.writing=!0,t.sync=!0,r?e._writev(n,t.onwrite):e._write(n,f,t.onwrite),t.sync=!1}function onwriteError(e,t,r,i,n){--t.pendingcb,r?processNextTick(n,i):n(i),e._writableState.errorEmitted=!0,e.emit("error",i)}function onwriteStateUpdate(e){e.writing=!1,e.writecb=null,e.length-=e.writelen,e.writelen=0}function onwrite(e,t){var r=e._writableState,i=r.sync,n=r.writecb;if(onwriteStateUpdate(r),t)onwriteError(e,r,i,t,n);else{var f=needFinish(r);f||r.corked||r.bufferProcessing||!r.bufferedRequest||clearBuffer(e,r),i?processNextTick(afterWrite,e,r,f,n):afterWrite(e,r,f,n)}}function afterWrite(e,t,r,i){r||onwriteDrain(e,t),t.pendingcb--,i(),finishMaybe(e,t)}function onwriteDrain(e,t){0===t.length&&t.needDrain&&(t.needDrain=!1,e.emit("drain"))}function clearBuffer(e,t){t.bufferProcessing=!0;var r=t.bufferedRequest;if(e._writev&&r&&r.next){for(var i=[],n=[];r;)n.push(r.callback),i.push(r),r=r.next;t.pendingcb++,t.lastBufferedRequest=null,doWrite(e,t,!0,t.length,i,"",function(e){for(var r=0;r<n.length;r++)t.pendingcb--,n[r](e)})}else{for(;r;){var f=r.chunk,o=r.encoding,u=r.callback,s=t.objectMode?1:f.length;if(doWrite(e,t,!1,s,f,o,u),r=r.next,t.writing)break}null===r&&(t.lastBufferedRequest=null)}t.bufferedRequest=r,t.bufferProcessing=!1}function needFinish(e){return e.ending&&0===e.length&&null===e.bufferedRequest&&!e.finished&&!e.writing}function prefinish(e,t){t.prefinished||(t.prefinished=!0,e.emit("prefinish"))}function finishMaybe(e,t){var r=needFinish(t);return r&&(0===t.pendingcb?(prefinish(e,t),t.finished=!0,e.emit("finish")):prefinish(e,t)),r}function endWritable(e,t,r){t.ending=!0,finishMaybe(e,t),r&&(t.finished?processNextTick(r):e.once("finish",r)),t.ended=!0}module.exports=Writable;var processNextTick=require("process-nextick-args"),Buffer=require("buffer").Buffer;Writable.WritableState=WritableState;var util=require("core-util-is");util.inherits=require("inherits");var internalUtil={deprecate:require("util-deprecate")},Stream;!function(){try{Stream=require("stream")}catch(e){}finally{Stream||(Stream=require("events").EventEmitter)}}();var Buffer=require("buffer").Buffer;util.inherits(Writable,Stream);var Duplex;WritableState.prototype.getBuffer=function(){for(var e=this.bufferedRequest,t=[];e;)t.push(e),e=e.next;return t},function(){try{Object.defineProperty(WritableState.prototype,"buffer",{get:internalUtil.deprecate(function(){return this.getBuffer()},"_writableState.buffer is deprecated. Use _writableState.getBuffer instead.")})}catch(e){}}();var Duplex;Writable.prototype.pipe=function(){this.emit("error",new Error("Cannot pipe. Not readable."))},Writable.prototype.write=function(e,t,r){var i=this._writableState,n=!1;return"function"==typeof t&&(r=t,t=null),Buffer.isBuffer(e)?t="buffer":t||(t=i.defaultEncoding),"function"!=typeof r&&(r=nop),i.ended?writeAfterEnd(this,r):validChunk(this,i,e,r)&&(i.pendingcb++,n=writeOrBuffer(this,i,e,t,r)),n},Writable.prototype.cork=function(){var e=this._writableState;e.corked++},Writable.prototype.uncork=function(){var e=this._writableState;e.corked&&(e.corked--,e.writing||e.corked||e.finished||e.bufferProcessing||!e.bufferedRequest||clearBuffer(this,e))},Writable.prototype.setDefaultEncoding=function(e){if("string"==typeof e&&(e=e.toLowerCase()),!(["hex","utf8","utf-8","ascii","binary","base64","ucs2","ucs-2","utf16le","utf-16le","raw"].indexOf((e+"").toLowerCase())>-1))throw new TypeError("Unknown encoding: "+e);this._writableState.defaultEncoding=e},Writable.prototype._write=function(e,t,r){r(new Error("not implemented"))},Writable.prototype._writev=null,Writable.prototype.end=function(e,t,r){var i=this._writableState;"function"==typeof e?(r=e,e=null,t=null):"function"==typeof t&&(r=t,t=null),null!==e&&void 0!==e&&this.write(e,t),i.corked&&(i.corked=1,this.uncork()),i.ending||i.finished||endWritable(this,i,r)};
 
-},{"./_stream_duplex":73,"buffer":17,"core-util-is":20,"events":25,"inherits":30,"process-nextick-args":66,"stream":82,"util-deprecate":91}],78:[function(require,module,exports){
+},{"./_stream_duplex":73,"buffer":17,"core-util-is":21,"events":26,"inherits":31,"process-nextick-args":66,"stream":82,"util-deprecate":90}],78:[function(require,module,exports){
 module.exports=require("./lib/_stream_passthrough.js");
 
 },{"./lib/_stream_passthrough.js":74}],79:[function(require,module,exports){
@@ -303,10 +308,10 @@ module.exports=require("./lib/_stream_writable.js");
 },{"./lib/_stream_writable.js":77}],82:[function(require,module,exports){
 function Stream(){EE.call(this)}module.exports=Stream;var EE=require("events").EventEmitter,inherits=require("inherits");inherits(Stream,EE),Stream.Readable=require("readable-stream/readable.js"),Stream.Writable=require("readable-stream/writable.js"),Stream.Duplex=require("readable-stream/duplex.js"),Stream.Transform=require("readable-stream/transform.js"),Stream.PassThrough=require("readable-stream/passthrough.js"),Stream.Stream=Stream,Stream.prototype.pipe=function(e,r){function t(r){e.writable&&!1===e.write(r)&&m.pause&&m.pause()}function n(){m.readable&&m.resume&&m.resume()}function a(){u||(u=!0,e.end())}function o(){u||(u=!0,"function"==typeof e.destroy&&e.destroy())}function i(e){if(s(),0===EE.listenerCount(this,"error"))throw e}function s(){m.removeListener("data",t),e.removeListener("drain",n),m.removeListener("end",a),m.removeListener("close",o),m.removeListener("error",i),e.removeListener("error",i),m.removeListener("end",s),m.removeListener("close",s),e.removeListener("close",s)}var m=this;m.on("data",t),e.on("drain",n),e._isStdio||r&&r.end===!1||(m.on("end",a),m.on("close",o));var u=!1;return m.on("error",i),e.on("error",i),m.on("end",s),m.on("close",s),e.on("close",s),e.emit("pipe",m),e};
 
-},{"events":25,"inherits":30,"readable-stream/duplex.js":72,"readable-stream/passthrough.js":78,"readable-stream/readable.js":79,"readable-stream/transform.js":80,"readable-stream/writable.js":81}],83:[function(require,module,exports){
+},{"events":26,"inherits":31,"readable-stream/duplex.js":72,"readable-stream/passthrough.js":78,"readable-stream/readable.js":79,"readable-stream/transform.js":80,"readable-stream/writable.js":81}],83:[function(require,module,exports){
 var ClientRequest=require("./lib/request"),extend=require("xtend"),statusCodes=require("builtin-status-codes"),url=require("url"),http=exports;http.request=function(t,e){t="string"==typeof t?url.parse(t):extend(t);var r=t.protocol||"",s=t.hostname||t.host,n=t.port,u=t.path||"/";s&&-1!==s.indexOf(":")&&(s="["+s+"]"),t.url=(s?r+"//"+s:"")+(n?":"+n:"")+u,t.method=(t.method||"GET").toUpperCase(),t.headers=t.headers||{};var C=new ClientRequest(t);return e&&C.on("response",e),C},http.get=function(t,e){var r=http.request(t,e);return r.end(),r},http.Agent=function(){},http.Agent.defaultMaxSockets=4,http.STATUS_CODES=statusCodes,http.METHODS=["CHECKOUT","CONNECT","COPY","DELETE","GET","HEAD","LOCK","M-SEARCH","MERGE","MKACTIVITY","MKCOL","MOVE","NOTIFY","OPTIONS","PATCH","POST","PROPFIND","PROPPATCH","PURGE","PUT","REPORT","SEARCH","SUBSCRIBE","TRACE","UNLOCK","UNSUBSCRIBE"];
 
-},{"./lib/request":85,"builtin-status-codes":18,"url":90,"xtend":94}],84:[function(require,module,exports){
+},{"./lib/request":85,"builtin-status-codes":19,"url":88,"xtend":93}],84:[function(require,module,exports){
 (function (global){
 function checkTypeSupport(e){try{return xhr.responseType=e,xhr.responseType===e}catch(r){}return!1}function isFunction(e){return"function"==typeof e}exports.fetch=isFunction(global.fetch)&&isFunction(global.ReadableByteStream),exports.blobConstructor=!1;try{new Blob([new ArrayBuffer(1)]),exports.blobConstructor=!0}catch(e){}var xhr=new global.XMLHttpRequest;xhr.open("GET",global.location.host?"/":"https://example.com");var haveArrayBuffer="undefined"!=typeof global.ArrayBuffer,haveSlice=haveArrayBuffer&&isFunction(global.ArrayBuffer.prototype.slice);exports.arraybuffer=haveArrayBuffer&&checkTypeSupport("arraybuffer"),exports.msstream=!exports.fetch&&haveSlice&&checkTypeSupport("ms-stream"),exports.mozchunkedarraybuffer=!exports.fetch&&haveArrayBuffer&&checkTypeSupport("moz-chunked-arraybuffer"),exports.overrideMimeType=isFunction(xhr.overrideMimeType),exports.vbArray=isFunction(global.VBArray),xhr=null;
 
@@ -314,45 +319,42 @@ function checkTypeSupport(e){try{return xhr.responseType=e,xhr.responseType===e}
 
 },{}],85:[function(require,module,exports){
 (function (process,global,Buffer){
-function decideMode(e){return capability.fetch?"fetch":capability.mozchunkedarraybuffer?"moz-chunked-arraybuffer":capability.msstream?"ms-stream":capability.arraybuffer&&e?"arraybuffer":capability.vbArray&&e?"text:vbarray":"text"}function statusValid(e){try{return null!==e.status}catch(t){return!1}}var capability=require("./capability"),foreach=require("foreach"),indexOf=require("indexof"),inherits=require("inherits"),keys=require("object-keys"),response=require("./response"),stream=require("stream"),IncomingMessage=response.IncomingMessage,rStates=response.readyStates,ClientRequest=module.exports=function(e){var t=this;stream.Writable.call(t),t._opts=e,t._body=[],t._headers={},e.auth&&t.setHeader("Authorization","Basic "+new Buffer(e.auth).toString("base64")),foreach(keys(e.headers),function(r){t.setHeader(r,e.headers[r])});var r;if("prefer-streaming"===e.mode)r=!1;else if("allow-wrong-content-type"===e.mode)r=!capability.overrideMimeType;else{if(e.mode&&"default"!==e.mode&&"prefer-fast"!==e.mode)throw new Error("Invalid value for opts.mode");r=!0}t._mode=decideMode(r),t.on("finish",function(){t._onFinish()})};inherits(ClientRequest,stream.Writable),ClientRequest.prototype.setHeader=function(e,t){var r=this,o=e.toLowerCase();-1===indexOf(unsafeHeaders,o)&&(r._headers[o]={name:e,value:t})},ClientRequest.prototype.getHeader=function(e){var t=this;return t._headers[e.toLowerCase()].value},ClientRequest.prototype.removeHeader=function(e){var t=this;delete t._headers[e.toLowerCase()]},ClientRequest.prototype._onFinish=function(){var e=this;if(!e._destroyed){var t,r=e._opts,o=e._headers;if(("POST"===r.method||"PUT"===r.method)&&(t=capability.blobConstructor?new global.Blob(e._body.map(function(e){return e.toArrayBuffer()}),{type:(o["content-type"]||{}).value||""}):Buffer.concat(e._body).toString()),"fetch"===e._mode){var n=keys(o).map(function(e){return[o[e].name,o[e].value]});global.fetch(e._opts.url,{method:e._opts.method,headers:n,body:t,mode:"cors",credentials:r.withCredentials?"include":"same-origin"}).then(function(t){e._fetchResponse=t,e._connect()}).then(void 0,function(t){e.emit("error",t)})}else{var s=e._xhr=new global.XMLHttpRequest;try{s.open(e._opts.method,e._opts.url,!0)}catch(i){return void process.nextTick(function(){e.emit("error",i)})}"responseType"in s&&(s.responseType=e._mode.split(":")[0]),"withCredentials"in s&&(s.withCredentials=!!r.withCredentials),"text"===e._mode&&"overrideMimeType"in s&&s.overrideMimeType("text/plain; charset=x-user-defined"),foreach(keys(o),function(e){s.setRequestHeader(o[e].name,o[e].value)}),e._response=null,s.onreadystatechange=function(){switch(s.readyState){case rStates.LOADING:case rStates.DONE:e._onXHRProgress()}},"moz-chunked-arraybuffer"===e._mode&&(s.onprogress=function(){e._onXHRProgress()}),s.onerror=function(){e._destroyed||e.emit("error",new Error("XHR error"))};try{s.send(t)}catch(i){return void process.nextTick(function(){e.emit("error",i)})}}}},ClientRequest.prototype._onXHRProgress=function(){var e=this;statusValid(e._xhr)&&!e._destroyed&&(e._response||e._connect(),e._response._onXHRProgress())},ClientRequest.prototype._connect=function(){var e=this;e._destroyed||(e._response=new IncomingMessage(e._xhr,e._fetchResponse,e._mode),e.emit("response",e._response))},ClientRequest.prototype._write=function(e,t,r){var o=this;o._body.push(e),r()},ClientRequest.prototype.abort=ClientRequest.prototype.destroy=function(){var e=this;e._destroyed=!0,e._response&&(e._response._destroyed=!0),e._xhr&&e._xhr.abort()},ClientRequest.prototype.end=function(e,t,r){var o=this;"function"==typeof e&&(r=e,e=void 0),stream.Writable.prototype.end.call(o,e,t,r)},ClientRequest.prototype.flushHeaders=function(){},ClientRequest.prototype.setTimeout=function(){},ClientRequest.prototype.setNoDelay=function(){},ClientRequest.prototype.setSocketKeepAlive=function(){};var unsafeHeaders=["accept-charset","accept-encoding","access-control-request-headers","access-control-request-method","connection","content-length","cookie","cookie2","date","dnt","expect","host","keep-alive","origin","referer","te","trailer","transfer-encoding","upgrade","user-agent","via"];
+function decideMode(e){return capability.fetch?"fetch":capability.mozchunkedarraybuffer?"moz-chunked-arraybuffer":capability.msstream?"ms-stream":capability.arraybuffer&&e?"arraybuffer":capability.vbArray&&e?"text:vbarray":"text"}function statusValid(e){try{return null!==e.status}catch(t){return!1}}var capability=require("./capability"),inherits=require("inherits"),response=require("./response"),stream=require("stream"),IncomingMessage=response.IncomingMessage,rStates=response.readyStates,ClientRequest=module.exports=function(e){var t=this;stream.Writable.call(t),t._opts=e,t._body=[],t._headers={},e.auth&&t.setHeader("Authorization","Basic "+new Buffer(e.auth).toString("base64")),Object.keys(e.headers).forEach(function(r){t.setHeader(r,e.headers[r])});var r;if("prefer-streaming"===e.mode)r=!1;else if("allow-wrong-content-type"===e.mode)r=!capability.overrideMimeType;else{if(e.mode&&"default"!==e.mode&&"prefer-fast"!==e.mode)throw new Error("Invalid value for opts.mode");r=!0}t._mode=decideMode(r),t.on("finish",function(){t._onFinish()})};inherits(ClientRequest,stream.Writable),ClientRequest.prototype.setHeader=function(e,t){var r=this,o=e.toLowerCase();-1===unsafeHeaders.indexOf(o)&&(r._headers[o]={name:e,value:t})},ClientRequest.prototype.getHeader=function(e){var t=this;return t._headers[e.toLowerCase()].value},ClientRequest.prototype.removeHeader=function(e){var t=this;delete t._headers[e.toLowerCase()]},ClientRequest.prototype._onFinish=function(){var e=this;if(!e._destroyed){var t,r=e._opts,o=e._headers;if(("POST"===r.method||"PUT"===r.method||"PATCH"===r.method)&&(t=capability.blobConstructor?new global.Blob(e._body.map(function(e){return e.toArrayBuffer()}),{type:(o["content-type"]||{}).value||""}):Buffer.concat(e._body).toString()),"fetch"===e._mode){var n=Object.keys(o).map(function(e){return[o[e].name,o[e].value]});global.fetch(e._opts.url,{method:e._opts.method,headers:n,body:t,mode:"cors",credentials:r.withCredentials?"include":"same-origin"}).then(function(t){e._fetchResponse=t,e._connect()},function(t){e.emit("error",t)})}else{var s=e._xhr=new global.XMLHttpRequest;try{s.open(e._opts.method,e._opts.url,!0)}catch(i){return void process.nextTick(function(){e.emit("error",i)})}"responseType"in s&&(s.responseType=e._mode.split(":")[0]),"withCredentials"in s&&(s.withCredentials=!!r.withCredentials),"text"===e._mode&&"overrideMimeType"in s&&s.overrideMimeType("text/plain; charset=x-user-defined"),Object.keys(o).forEach(function(e){s.setRequestHeader(o[e].name,o[e].value)}),e._response=null,s.onreadystatechange=function(){switch(s.readyState){case rStates.LOADING:case rStates.DONE:e._onXHRProgress()}},"moz-chunked-arraybuffer"===e._mode&&(s.onprogress=function(){e._onXHRProgress()}),s.onerror=function(){e._destroyed||e.emit("error",new Error("XHR error"))};try{s.send(t)}catch(i){return void process.nextTick(function(){e.emit("error",i)})}}}},ClientRequest.prototype._onXHRProgress=function(){var e=this;statusValid(e._xhr)&&!e._destroyed&&(e._response||e._connect(),e._response._onXHRProgress())},ClientRequest.prototype._connect=function(){var e=this;e._destroyed||(e._response=new IncomingMessage(e._xhr,e._fetchResponse,e._mode),e.emit("response",e._response))},ClientRequest.prototype._write=function(e,t,r){var o=this;o._body.push(e),r()},ClientRequest.prototype.abort=ClientRequest.prototype.destroy=function(){var e=this;e._destroyed=!0,e._response&&(e._response._destroyed=!0),e._xhr&&e._xhr.abort()},ClientRequest.prototype.end=function(e,t,r){var o=this;"function"==typeof e&&(r=e,e=void 0),stream.Writable.prototype.end.call(o,e,t,r)},ClientRequest.prototype.flushHeaders=function(){},ClientRequest.prototype.setTimeout=function(){},ClientRequest.prototype.setNoDelay=function(){},ClientRequest.prototype.setSocketKeepAlive=function(){};var unsafeHeaders=["accept-charset","accept-encoding","access-control-request-headers","access-control-request-method","connection","content-length","cookie","cookie2","date","dnt","expect","host","keep-alive","origin","referer","te","trailer","transfer-encoding","upgrade","user-agent","via"];
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
 
-},{"./capability":84,"./response":86,"_process":67,"buffer":17,"foreach":26,"indexof":29,"inherits":30,"object-keys":87,"stream":82}],86:[function(require,module,exports){
+},{"./capability":84,"./response":86,"_process":67,"buffer":17,"inherits":31,"stream":82}],86:[function(require,module,exports){
 (function (process,global,Buffer){
-var capability=require("./capability"),foreach=require("foreach"),inherits=require("inherits"),stream=require("stream"),rStates=exports.readyStates={UNSENT:0,OPENED:1,HEADERS_RECEIVED:2,LOADING:3,DONE:4},IncomingMessage=exports.IncomingMessage=function(e,r,a){function s(){u.read().then(function(e){if(!t._destroyed){if(e.done)return void t.push(null);t.push(new Buffer(e.value)),s()}})}var t=this;if(stream.Readable.call(t),t._mode=a,t.headers={},t.rawHeaders=[],t.trailers={},t.rawTrailers=[],t.on("end",function(){process.nextTick(function(){t.emit("close")})}),"fetch"===a){t._fetchResponse=r,t.statusCode=r.status,t.statusMessage=r.statusText;for(var n,o,i=r.headers[Symbol.iterator]();n=(o=i.next()).value,!o.done;)t.headers[n[0].toLowerCase()]=n[1],t.rawHeaders.push(n[0],n[1]);var u=r.body.getReader();s()}else{t._xhr=e,t._pos=0,t.statusCode=e.status,t.statusMessage=e.statusText;var h=e.getAllResponseHeaders().split(/\r?\n/);if(foreach(h,function(e){var r=e.match(/^([^:]+):\s*(.*)/);if(r){var a=r[1].toLowerCase();void 0!==t.headers[a]?t.headers[a]+=", "+r[2]:t.headers[a]=r[2],t.rawHeaders.push(r[1],r[2])}}),t._charset="x-user-defined",!capability.overrideMimeType){var f=t.rawHeaders["mime-type"];if(f){var c=f.match(/;\s*charset=([^;])(;|$)/);c&&(t._charset=c[1].toLowerCase())}t._charset||(t._charset="utf-8")}}};inherits(IncomingMessage,stream.Readable),IncomingMessage.prototype._read=function(){},IncomingMessage.prototype._onXHRProgress=function(){var e=this,r=e._xhr,a=null;switch(e._mode){case"text:vbarray":if(r.readyState!==rStates.DONE)break;try{a=new global.VBArray(r.responseBody).toArray()}catch(s){}if(null!==a){e.push(new Buffer(a));break}case"text":try{a=r.responseText}catch(s){e._mode="text:vbarray";break}if(a.length>e._pos){var t=a.substr(e._pos);if("x-user-defined"===e._charset){for(var n=new Buffer(t.length),o=0;o<t.length;o++)n[o]=255&t.charCodeAt(o);e.push(n)}else e.push(t,e._charset);e._pos=a.length}break;case"arraybuffer":if(r.readyState!==rStates.DONE)break;a=r.response,e.push(new Buffer(new Uint8Array(a)));break;case"moz-chunked-arraybuffer":if(a=r.response,r.readyState!==rStates.LOADING||!a)break;e.push(new Buffer(new Uint8Array(a)));break;case"ms-stream":if(a=r.response,r.readyState!==rStates.LOADING)break;var i=new global.MSStreamReader;i.onprogress=function(){i.result.byteLength>e._pos&&(e.push(new Buffer(new Uint8Array(i.result.slice(e._pos)))),e._pos=i.result.byteLength)},i.onload=function(){e.push(null)},i.readAsArrayBuffer(a)}e._xhr.readyState===rStates.DONE&&"ms-stream"!==e._mode&&e.push(null)};
+var capability=require("./capability"),inherits=require("inherits"),stream=require("stream"),rStates=exports.readyStates={UNSENT:0,OPENED:1,HEADERS_RECEIVED:2,LOADING:3,DONE:4},IncomingMessage=exports.IncomingMessage=function(e,r,a){function s(){u.read().then(function(e){if(!t._destroyed){if(e.done)return void t.push(null);t.push(new Buffer(e.value)),s()}})}var t=this;if(stream.Readable.call(t),t._mode=a,t.headers={},t.rawHeaders=[],t.trailers={},t.rawTrailers=[],t.on("end",function(){process.nextTick(function(){t.emit("close")})}),"fetch"===a){t._fetchResponse=r,t.statusCode=r.status,t.statusMessage=r.statusText;for(var n,o,i=r.headers[Symbol.iterator]();n=(o=i.next()).value,!o.done;)t.headers[n[0].toLowerCase()]=n[1],t.rawHeaders.push(n[0],n[1]);var u=r.body.getReader();s()}else{t._xhr=e,t._pos=0,t.statusCode=e.status,t.statusMessage=e.statusText;var h=e.getAllResponseHeaders().split(/\r?\n/);if(h.forEach(function(e){var r=e.match(/^([^:]+):\s*(.*)/);if(r){var a=r[1].toLowerCase();void 0!==t.headers[a]?t.headers[a]+=", "+r[2]:t.headers[a]=r[2],t.rawHeaders.push(r[1],r[2])}}),t._charset="x-user-defined",!capability.overrideMimeType){var f=t.rawHeaders["mime-type"];if(f){var c=f.match(/;\s*charset=([^;])(;|$)/);c&&(t._charset=c[1].toLowerCase())}t._charset||(t._charset="utf-8")}}};inherits(IncomingMessage,stream.Readable),IncomingMessage.prototype._read=function(){},IncomingMessage.prototype._onXHRProgress=function(){var e=this,r=e._xhr,a=null;switch(e._mode){case"text:vbarray":if(r.readyState!==rStates.DONE)break;try{a=new global.VBArray(r.responseBody).toArray()}catch(s){}if(null!==a){e.push(new Buffer(a));break}case"text":try{a=r.responseText}catch(s){e._mode="text:vbarray";break}if(a.length>e._pos){var t=a.substr(e._pos);if("x-user-defined"===e._charset){for(var n=new Buffer(t.length),o=0;o<t.length;o++)n[o]=255&t.charCodeAt(o);e.push(n)}else e.push(t,e._charset);e._pos=a.length}break;case"arraybuffer":if(r.readyState!==rStates.DONE)break;a=r.response,e.push(new Buffer(new Uint8Array(a)));break;case"moz-chunked-arraybuffer":if(a=r.response,r.readyState!==rStates.LOADING||!a)break;e.push(new Buffer(new Uint8Array(a)));break;case"ms-stream":if(a=r.response,r.readyState!==rStates.LOADING)break;var i=new global.MSStreamReader;i.onprogress=function(){i.result.byteLength>e._pos&&(e.push(new Buffer(new Uint8Array(i.result.slice(e._pos)))),e._pos=i.result.byteLength)},i.onload=function(){e.push(null)},i.readAsArrayBuffer(a)}e._xhr.readyState===rStates.DONE&&"ms-stream"!==e._mode&&e.push(null)};
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
 
-},{"./capability":84,"_process":67,"buffer":17,"foreach":26,"inherits":30,"stream":82}],87:[function(require,module,exports){
-"use strict";var has=Object.prototype.hasOwnProperty,toStr=Object.prototype.toString,slice=Array.prototype.slice,isArgs=require("./isArguments"),hasDontEnumBug=!{toString:null}.propertyIsEnumerable("toString"),hasProtoEnumBug=function(){}.propertyIsEnumerable("prototype"),dontEnums=["toString","toLocaleString","valueOf","hasOwnProperty","isPrototypeOf","propertyIsEnumerable","constructor"],equalsConstructorPrototype=function(t){var r=t.constructor;return r&&r.prototype===t},blacklistedKeys={$console:!0,$frame:!0,$frameElement:!0,$frames:!0,$parent:!0,$self:!0,$webkitIndexedDB:!0,$webkitStorageInfo:!0,$window:!0},hasAutomationEqualityBug=function(){if("undefined"==typeof window)return!1;for(var t in window)try{if(!blacklistedKeys["$"+t]&&has.call(window,t)&&null!==window[t]&&"object"==typeof window[t])try{equalsConstructorPrototype(window[t])}catch(r){return!0}}catch(r){return!0}return!1}(),equalsConstructorPrototypeIfNotBuggy=function(t){if("undefined"==typeof window||!hasAutomationEqualityBug)return equalsConstructorPrototype(t);try{return equalsConstructorPrototype(t)}catch(r){return!1}},keysShim=function(t){var r=null!==t&&"object"==typeof t,e="[object Function]"===toStr.call(t),o=isArgs(t),n=r&&"[object String]"===toStr.call(t),s=[];if(!r&&!e&&!o)throw new TypeError("Object.keys called on a non-object");var u=hasProtoEnumBug&&e;if(n&&t.length>0&&!has.call(t,0))for(var i=0;i<t.length;++i)s.push(String(i));if(o&&t.length>0)for(var a=0;a<t.length;++a)s.push(String(a));else for(var c in t)u&&"prototype"===c||!has.call(t,c)||s.push(String(c));if(hasDontEnumBug)for(var l=equalsConstructorPrototypeIfNotBuggy(t),y=0;y<dontEnums.length;++y)l&&"constructor"===dontEnums[y]||!has.call(t,dontEnums[y])||s.push(dontEnums[y]);return s};keysShim.shim=function(){if(Object.keys){var t=function(){return 2===(Object.keys(arguments)||"").length}(1,2);if(!t){var r=Object.keys;Object.keys=function(t){return r(isArgs(t)?slice.call(t):t)}}}else Object.keys=keysShim;return Object.keys||keysShim},module.exports=keysShim;
-
-},{"./isArguments":88}],88:[function(require,module,exports){
-"use strict";var toStr=Object.prototype.toString;module.exports=function(t){var e=toStr.call(t),o="[object Arguments]"===e;return o||(o="[object Array]"!==e&&null!==t&&"object"==typeof t&&"number"==typeof t.length&&t.length>=0&&"[object Function]"===toStr.call(t.callee)),o};
-
-},{}],89:[function(require,module,exports){
+},{"./capability":84,"_process":67,"buffer":17,"inherits":31,"stream":82}],87:[function(require,module,exports){
 function assertEncoding(e){if(e&&!isBufferEncoding(e))throw new Error("Unknown encoding: "+e)}function passThroughWrite(e){return e.toString(this.encoding)}function utf16DetectIncompleteChar(e){this.charReceived=e.length%2,this.charLength=this.charReceived?2:0}function base64DetectIncompleteChar(e){this.charReceived=e.length%3,this.charLength=this.charReceived?3:0}var Buffer=require("buffer").Buffer,isBufferEncoding=Buffer.isEncoding||function(e){switch(e&&e.toLowerCase()){case"hex":case"utf8":case"utf-8":case"ascii":case"binary":case"base64":case"ucs2":case"ucs-2":case"utf16le":case"utf-16le":case"raw":return!0;default:return!1}},StringDecoder=exports.StringDecoder=function(e){switch(this.encoding=(e||"utf8").toLowerCase().replace(/[-_]/,""),assertEncoding(e),this.encoding){case"utf8":this.surrogateSize=3;break;case"ucs2":case"utf16le":this.surrogateSize=2,this.detectIncompleteChar=utf16DetectIncompleteChar;break;case"base64":this.surrogateSize=3,this.detectIncompleteChar=base64DetectIncompleteChar;break;default:return void(this.write=passThroughWrite)}this.charBuffer=new Buffer(6),this.charReceived=0,this.charLength=0};StringDecoder.prototype.write=function(e){for(var t="";this.charLength;){var r=e.length>=this.charLength-this.charReceived?this.charLength-this.charReceived:e.length;if(e.copy(this.charBuffer,this.charReceived,0,r),this.charReceived+=r,this.charReceived<this.charLength)return"";e=e.slice(r,e.length),t=this.charBuffer.slice(0,this.charLength).toString(this.encoding);var h=t.charCodeAt(t.length-1);if(!(h>=55296&&56319>=h)){if(this.charReceived=this.charLength=0,0===e.length)return t;break}this.charLength+=this.surrogateSize,t=""}this.detectIncompleteChar(e);var i=e.length;this.charLength&&(e.copy(this.charBuffer,0,e.length-this.charReceived,i),i-=this.charReceived),t+=e.toString(this.encoding,0,i);var i=t.length-1,h=t.charCodeAt(i);if(h>=55296&&56319>=h){var c=this.surrogateSize;return this.charLength+=c,this.charReceived+=c,this.charBuffer.copy(this.charBuffer,c,0,c),e.copy(this.charBuffer,0,0,c),t.substring(0,i)}return t},StringDecoder.prototype.detectIncompleteChar=function(e){for(var t=e.length>=3?3:e.length;t>0;t--){var r=e[e.length-t];if(1==t&&r>>5==6){this.charLength=2;break}if(2>=t&&r>>4==14){this.charLength=3;break}if(3>=t&&r>>3==30){this.charLength=4;break}}this.charReceived=t},StringDecoder.prototype.end=function(e){var t="";if(e&&e.length&&(t=this.write(e)),this.charReceived){var r=this.charReceived,h=this.charBuffer,i=this.encoding;t+=h.slice(0,r).toString(i)}return t};
 
-},{"buffer":17}],90:[function(require,module,exports){
-function Url(){this.protocol=null,this.slashes=null,this.auth=null,this.host=null,this.port=null,this.hostname=null,this.hash=null,this.search=null,this.query=null,this.pathname=null,this.path=null,this.href=null}function urlParse(t,s,e){if(t&&isObject(t)&&t instanceof Url)return t;var h=new Url;return h.parse(t,s,e),h}function urlFormat(t){return isString(t)&&(t=urlParse(t)),t instanceof Url?t.format():Url.prototype.format.call(t)}function urlResolve(t,s){return urlParse(t,!1,!0).resolve(s)}function urlResolveObject(t,s){return t?urlParse(t,!1,!0).resolveObject(s):s}function isString(t){return"string"==typeof t}function isObject(t){return"object"==typeof t&&null!==t}function isNull(t){return null===t}function isNullOrUndefined(t){return null==t}var punycode=require("punycode");exports.parse=urlParse,exports.resolve=urlResolve,exports.resolveObject=urlResolveObject,exports.format=urlFormat,exports.Url=Url;var protocolPattern=/^([a-z0-9.+-]+:)/i,portPattern=/:[0-9]*$/,delims=["<",">",'"',"`"," ","\r","\n","	"],unwise=["{","}","|","\\","^","`"].concat(delims),autoEscape=["'"].concat(unwise),nonHostChars=["%","/","?",";","#"].concat(autoEscape),hostEndingChars=["/","?","#"],hostnameMaxLen=255,hostnamePartPattern=/^[a-z0-9A-Z_-]{0,63}$/,hostnamePartStart=/^([a-z0-9A-Z_-]{0,63})(.*)$/,unsafeProtocol={javascript:!0,"javascript:":!0},hostlessProtocol={javascript:!0,"javascript:":!0},slashedProtocol={http:!0,https:!0,ftp:!0,gopher:!0,file:!0,"http:":!0,"https:":!0,"ftp:":!0,"gopher:":!0,"file:":!0},querystring=require("querystring");Url.prototype.parse=function(t,s,e){if(!isString(t))throw new TypeError("Parameter 'url' must be a string, not "+typeof t);var h=t;h=h.trim();var r=protocolPattern.exec(h);if(r){r=r[0];var o=r.toLowerCase();this.protocol=o,h=h.substr(r.length)}if(e||r||h.match(/^\/\/[^@\/]+@[^@\/]+/)){var a="//"===h.substr(0,2);!a||r&&hostlessProtocol[r]||(h=h.substr(2),this.slashes=!0)}if(!hostlessProtocol[r]&&(a||r&&!slashedProtocol[r])){for(var n=-1,i=0;i<hostEndingChars.length;i++){var l=h.indexOf(hostEndingChars[i]);-1!==l&&(-1===n||n>l)&&(n=l)}var c,u;u=-1===n?h.lastIndexOf("@"):h.lastIndexOf("@",n),-1!==u&&(c=h.slice(0,u),h=h.slice(u+1),this.auth=decodeURIComponent(c)),n=-1;for(var i=0;i<nonHostChars.length;i++){var l=h.indexOf(nonHostChars[i]);-1!==l&&(-1===n||n>l)&&(n=l)}-1===n&&(n=h.length),this.host=h.slice(0,n),h=h.slice(n),this.parseHost(),this.hostname=this.hostname||"";var p="["===this.hostname[0]&&"]"===this.hostname[this.hostname.length-1];if(!p)for(var f=this.hostname.split(/\./),i=0,m=f.length;m>i;i++){var v=f[i];if(v&&!v.match(hostnamePartPattern)){for(var g="",y=0,d=v.length;d>y;y++)g+=v.charCodeAt(y)>127?"x":v[y];if(!g.match(hostnamePartPattern)){var P=f.slice(0,i),b=f.slice(i+1),j=v.match(hostnamePartStart);j&&(P.push(j[1]),b.unshift(j[2])),b.length&&(h="/"+b.join(".")+h),this.hostname=P.join(".");break}}}if(this.hostname.length>hostnameMaxLen?this.hostname="":this.hostname=this.hostname.toLowerCase(),!p){for(var O=this.hostname.split("."),q=[],i=0;i<O.length;++i){var x=O[i];q.push(x.match(/[^A-Za-z0-9_-]/)?"xn--"+punycode.encode(x):x)}this.hostname=q.join(".")}var U=this.port?":"+this.port:"",C=this.hostname||"";this.host=C+U,this.href+=this.host,p&&(this.hostname=this.hostname.substr(1,this.hostname.length-2),"/"!==h[0]&&(h="/"+h))}if(!unsafeProtocol[o])for(var i=0,m=autoEscape.length;m>i;i++){var A=autoEscape[i],E=encodeURIComponent(A);E===A&&(E=escape(A)),h=h.split(A).join(E)}var w=h.indexOf("#");-1!==w&&(this.hash=h.substr(w),h=h.slice(0,w));var R=h.indexOf("?");if(-1!==R?(this.search=h.substr(R),this.query=h.substr(R+1),s&&(this.query=querystring.parse(this.query)),h=h.slice(0,R)):s&&(this.search="",this.query={}),h&&(this.pathname=h),slashedProtocol[o]&&this.hostname&&!this.pathname&&(this.pathname="/"),this.pathname||this.search){var U=this.pathname||"",x=this.search||"";this.path=U+x}return this.href=this.format(),this},Url.prototype.format=function(){var t=this.auth||"";t&&(t=encodeURIComponent(t),t=t.replace(/%3A/i,":"),t+="@");var s=this.protocol||"",e=this.pathname||"",h=this.hash||"",r=!1,o="";this.host?r=t+this.host:this.hostname&&(r=t+(-1===this.hostname.indexOf(":")?this.hostname:"["+this.hostname+"]"),this.port&&(r+=":"+this.port)),this.query&&isObject(this.query)&&Object.keys(this.query).length&&(o=querystring.stringify(this.query));var a=this.search||o&&"?"+o||"";return s&&":"!==s.substr(-1)&&(s+=":"),this.slashes||(!s||slashedProtocol[s])&&r!==!1?(r="//"+(r||""),e&&"/"!==e.charAt(0)&&(e="/"+e)):r||(r=""),h&&"#"!==h.charAt(0)&&(h="#"+h),a&&"?"!==a.charAt(0)&&(a="?"+a),e=e.replace(/[?#]/g,function(t){return encodeURIComponent(t)}),a=a.replace("#","%23"),s+r+e+a+h},Url.prototype.resolve=function(t){return this.resolveObject(urlParse(t,!1,!0)).format()},Url.prototype.resolveObject=function(t){if(isString(t)){var s=new Url;s.parse(t,!1,!0),t=s}var e=new Url;if(Object.keys(this).forEach(function(t){e[t]=this[t]},this),e.hash=t.hash,""===t.href)return e.href=e.format(),e;if(t.slashes&&!t.protocol)return Object.keys(t).forEach(function(s){"protocol"!==s&&(e[s]=t[s])}),slashedProtocol[e.protocol]&&e.hostname&&!e.pathname&&(e.path=e.pathname="/"),e.href=e.format(),e;if(t.protocol&&t.protocol!==e.protocol){if(!slashedProtocol[t.protocol])return Object.keys(t).forEach(function(s){e[s]=t[s]}),e.href=e.format(),e;if(e.protocol=t.protocol,t.host||hostlessProtocol[t.protocol])e.pathname=t.pathname;else{for(var h=(t.pathname||"").split("/");h.length&&!(t.host=h.shift()););t.host||(t.host=""),t.hostname||(t.hostname=""),""!==h[0]&&h.unshift(""),h.length<2&&h.unshift(""),e.pathname=h.join("/")}if(e.search=t.search,e.query=t.query,e.host=t.host||"",e.auth=t.auth,e.hostname=t.hostname||t.host,e.port=t.port,e.pathname||e.search){var r=e.pathname||"",o=e.search||"";e.path=r+o}return e.slashes=e.slashes||t.slashes,e.href=e.format(),e}var a=e.pathname&&"/"===e.pathname.charAt(0),n=t.host||t.pathname&&"/"===t.pathname.charAt(0),i=n||a||e.host&&t.pathname,l=i,c=e.pathname&&e.pathname.split("/")||[],h=t.pathname&&t.pathname.split("/")||[],u=e.protocol&&!slashedProtocol[e.protocol];if(u&&(e.hostname="",e.port=null,e.host&&(""===c[0]?c[0]=e.host:c.unshift(e.host)),e.host="",t.protocol&&(t.hostname=null,t.port=null,t.host&&(""===h[0]?h[0]=t.host:h.unshift(t.host)),t.host=null),i=i&&(""===h[0]||""===c[0])),n)e.host=t.host||""===t.host?t.host:e.host,e.hostname=t.hostname||""===t.hostname?t.hostname:e.hostname,e.search=t.search,e.query=t.query,c=h;else if(h.length)c||(c=[]),c.pop(),c=c.concat(h),e.search=t.search,e.query=t.query;else if(!isNullOrUndefined(t.search)){if(u){e.hostname=e.host=c.shift();var p=e.host&&e.host.indexOf("@")>0?e.host.split("@"):!1;p&&(e.auth=p.shift(),e.host=e.hostname=p.shift())}return e.search=t.search,e.query=t.query,isNull(e.pathname)&&isNull(e.search)||(e.path=(e.pathname?e.pathname:"")+(e.search?e.search:"")),e.href=e.format(),e}if(!c.length)return e.pathname=null,e.search?e.path="/"+e.search:e.path=null,e.href=e.format(),e;for(var f=c.slice(-1)[0],m=(e.host||t.host)&&("."===f||".."===f)||""===f,v=0,g=c.length;g>=0;g--)f=c[g],"."==f?c.splice(g,1):".."===f?(c.splice(g,1),v++):v&&(c.splice(g,1),v--);if(!i&&!l)for(;v--;v)c.unshift("..");!i||""===c[0]||c[0]&&"/"===c[0].charAt(0)||c.unshift(""),m&&"/"!==c.join("/").substr(-1)&&c.push("");var y=""===c[0]||c[0]&&"/"===c[0].charAt(0);if(u){e.hostname=e.host=y?"":c.length?c.shift():"";var p=e.host&&e.host.indexOf("@")>0?e.host.split("@"):!1;p&&(e.auth=p.shift(),e.host=e.hostname=p.shift())}return i=i||e.host&&c.length,i&&!y&&c.unshift(""),c.length?e.pathname=c.join("/"):(e.pathname=null,e.path=null),isNull(e.pathname)&&isNull(e.search)||(e.path=(e.pathname?e.pathname:"")+(e.search?e.search:"")),e.auth=t.auth||e.auth,e.slashes=e.slashes||t.slashes,e.href=e.format(),e},Url.prototype.parseHost=function(){var t=this.host,s=portPattern.exec(t);s&&(s=s[0],":"!==s&&(this.port=s.substr(1)),t=t.substr(0,t.length-s.length)),t&&(this.hostname=t)};
+},{"buffer":17}],88:[function(require,module,exports){
+"use strict";function Url(){this.protocol=null,this.slashes=null,this.auth=null,this.host=null,this.port=null,this.hostname=null,this.hash=null,this.search=null,this.query=null,this.pathname=null,this.path=null,this.href=null}function urlParse(t,s,e){if(t&&util.isObject(t)&&t instanceof Url)return t;var h=new Url;return h.parse(t,s,e),h}function urlFormat(t){return util.isString(t)&&(t=urlParse(t)),t instanceof Url?t.format():Url.prototype.format.call(t)}function urlResolve(t,s){return urlParse(t,!1,!0).resolve(s)}function urlResolveObject(t,s){return t?urlParse(t,!1,!0).resolveObject(s):s}var punycode=require("punycode"),util=require("./util");exports.parse=urlParse,exports.resolve=urlResolve,exports.resolveObject=urlResolveObject,exports.format=urlFormat,exports.Url=Url;var protocolPattern=/^([a-z0-9.+-]+:)/i,portPattern=/:[0-9]*$/,simplePathPattern=/^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,delims=["<",">",'"',"`"," ","\r","\n","	"],unwise=["{","}","|","\\","^","`"].concat(delims),autoEscape=["'"].concat(unwise),nonHostChars=["%","/","?",";","#"].concat(autoEscape),hostEndingChars=["/","?","#"],hostnameMaxLen=255,hostnamePartPattern=/^[+a-z0-9A-Z_-]{0,63}$/,hostnamePartStart=/^([+a-z0-9A-Z_-]{0,63})(.*)$/,unsafeProtocol={javascript:!0,"javascript:":!0},hostlessProtocol={javascript:!0,"javascript:":!0},slashedProtocol={http:!0,https:!0,ftp:!0,gopher:!0,file:!0,"http:":!0,"https:":!0,"ftp:":!0,"gopher:":!0,"file:":!0},querystring=require("querystring");Url.prototype.parse=function(t,s,e){if(!util.isString(t))throw new TypeError("Parameter 'url' must be a string, not "+typeof t);var h=t.indexOf("?"),r=-1!==h&&h<t.indexOf("#")?"?":"#",a=t.split(r),o=/\\/g;a[0]=a[0].replace(o,"/"),t=a.join(r);var n=t;if(n=n.trim(),!e&&1===t.split("#").length){var i=simplePathPattern.exec(n);if(i)return this.path=n,this.href=n,this.pathname=i[1],i[2]?(this.search=i[2],s?this.query=querystring.parse(this.search.substr(1)):this.query=this.search.substr(1)):s&&(this.search="",this.query={}),this}var l=protocolPattern.exec(n);if(l){l=l[0];var u=l.toLowerCase();this.protocol=u,n=n.substr(l.length)}if(e||l||n.match(/^\/\/[^@\/]+@[^@\/]+/)){var p="//"===n.substr(0,2);!p||l&&hostlessProtocol[l]||(n=n.substr(2),this.slashes=!0)}if(!hostlessProtocol[l]&&(p||l&&!slashedProtocol[l])){for(var c=-1,f=0;f<hostEndingChars.length;f++){var m=n.indexOf(hostEndingChars[f]);-1!==m&&(-1===c||c>m)&&(c=m)}var v,g;g=-1===c?n.lastIndexOf("@"):n.lastIndexOf("@",c),-1!==g&&(v=n.slice(0,g),n=n.slice(g+1),this.auth=decodeURIComponent(v)),c=-1;for(var f=0;f<nonHostChars.length;f++){var m=n.indexOf(nonHostChars[f]);-1!==m&&(-1===c||c>m)&&(c=m)}-1===c&&(c=n.length),this.host=n.slice(0,c),n=n.slice(c),this.parseHost(),this.hostname=this.hostname||"";var y="["===this.hostname[0]&&"]"===this.hostname[this.hostname.length-1];if(!y)for(var P=this.hostname.split(/\./),f=0,d=P.length;d>f;f++){var q=P[f];if(q&&!q.match(hostnamePartPattern)){for(var b="",O=0,j=q.length;j>O;O++)b+=q.charCodeAt(O)>127?"x":q[O];if(!b.match(hostnamePartPattern)){var x=P.slice(0,f),U=P.slice(f+1),C=q.match(hostnamePartStart);C&&(x.push(C[1]),U.unshift(C[2])),U.length&&(n="/"+U.join(".")+n),this.hostname=x.join(".");break}}}this.hostname.length>hostnameMaxLen?this.hostname="":this.hostname=this.hostname.toLowerCase(),y||(this.hostname=punycode.toASCII(this.hostname));var A=this.port?":"+this.port:"",w=this.hostname||"";this.host=w+A,this.href+=this.host,y&&(this.hostname=this.hostname.substr(1,this.hostname.length-2),"/"!==n[0]&&(n="/"+n))}if(!unsafeProtocol[u])for(var f=0,d=autoEscape.length;d>f;f++){var E=autoEscape[f];if(-1!==n.indexOf(E)){var I=encodeURIComponent(E);I===E&&(I=escape(E)),n=n.split(E).join(I)}}var R=n.indexOf("#");-1!==R&&(this.hash=n.substr(R),n=n.slice(0,R));var S=n.indexOf("?");if(-1!==S?(this.search=n.substr(S),this.query=n.substr(S+1),s&&(this.query=querystring.parse(this.query)),n=n.slice(0,S)):s&&(this.search="",this.query={}),n&&(this.pathname=n),slashedProtocol[u]&&this.hostname&&!this.pathname&&(this.pathname="/"),this.pathname||this.search){var A=this.pathname||"",k=this.search||"";this.path=A+k}return this.href=this.format(),this},Url.prototype.format=function(){var t=this.auth||"";t&&(t=encodeURIComponent(t),t=t.replace(/%3A/i,":"),t+="@");var s=this.protocol||"",e=this.pathname||"",h=this.hash||"",r=!1,a="";this.host?r=t+this.host:this.hostname&&(r=t+(-1===this.hostname.indexOf(":")?this.hostname:"["+this.hostname+"]"),this.port&&(r+=":"+this.port)),this.query&&util.isObject(this.query)&&Object.keys(this.query).length&&(a=querystring.stringify(this.query));var o=this.search||a&&"?"+a||"";return s&&":"!==s.substr(-1)&&(s+=":"),this.slashes||(!s||slashedProtocol[s])&&r!==!1?(r="//"+(r||""),e&&"/"!==e.charAt(0)&&(e="/"+e)):r||(r=""),h&&"#"!==h.charAt(0)&&(h="#"+h),o&&"?"!==o.charAt(0)&&(o="?"+o),e=e.replace(/[?#]/g,function(t){return encodeURIComponent(t)}),o=o.replace("#","%23"),s+r+e+o+h},Url.prototype.resolve=function(t){return this.resolveObject(urlParse(t,!1,!0)).format()},Url.prototype.resolveObject=function(t){if(util.isString(t)){var s=new Url;s.parse(t,!1,!0),t=s}for(var e=new Url,h=Object.keys(this),r=0;r<h.length;r++){var a=h[r];e[a]=this[a]}if(e.hash=t.hash,""===t.href)return e.href=e.format(),e;if(t.slashes&&!t.protocol){for(var o=Object.keys(t),n=0;n<o.length;n++){var i=o[n];"protocol"!==i&&(e[i]=t[i])}return slashedProtocol[e.protocol]&&e.hostname&&!e.pathname&&(e.path=e.pathname="/"),e.href=e.format(),e}if(t.protocol&&t.protocol!==e.protocol){if(!slashedProtocol[t.protocol]){for(var l=Object.keys(t),u=0;u<l.length;u++){var p=l[u];e[p]=t[p]}return e.href=e.format(),e}if(e.protocol=t.protocol,t.host||hostlessProtocol[t.protocol])e.pathname=t.pathname;else{for(var c=(t.pathname||"").split("/");c.length&&!(t.host=c.shift()););t.host||(t.host=""),t.hostname||(t.hostname=""),""!==c[0]&&c.unshift(""),c.length<2&&c.unshift(""),e.pathname=c.join("/")}if(e.search=t.search,e.query=t.query,e.host=t.host||"",e.auth=t.auth,e.hostname=t.hostname||t.host,e.port=t.port,e.pathname||e.search){var f=e.pathname||"",m=e.search||"";e.path=f+m}return e.slashes=e.slashes||t.slashes,e.href=e.format(),e}var v=e.pathname&&"/"===e.pathname.charAt(0),g=t.host||t.pathname&&"/"===t.pathname.charAt(0),y=g||v||e.host&&t.pathname,P=y,d=e.pathname&&e.pathname.split("/")||[],c=t.pathname&&t.pathname.split("/")||[],q=e.protocol&&!slashedProtocol[e.protocol];if(q&&(e.hostname="",e.port=null,e.host&&(""===d[0]?d[0]=e.host:d.unshift(e.host)),e.host="",t.protocol&&(t.hostname=null,t.port=null,t.host&&(""===c[0]?c[0]=t.host:c.unshift(t.host)),t.host=null),y=y&&(""===c[0]||""===d[0])),g)e.host=t.host||""===t.host?t.host:e.host,e.hostname=t.hostname||""===t.hostname?t.hostname:e.hostname,e.search=t.search,e.query=t.query,d=c;else if(c.length)d||(d=[]),d.pop(),d=d.concat(c),e.search=t.search,e.query=t.query;else if(!util.isNullOrUndefined(t.search)){if(q){e.hostname=e.host=d.shift();var b=e.host&&e.host.indexOf("@")>0?e.host.split("@"):!1;b&&(e.auth=b.shift(),e.host=e.hostname=b.shift())}return e.search=t.search,e.query=t.query,util.isNull(e.pathname)&&util.isNull(e.search)||(e.path=(e.pathname?e.pathname:"")+(e.search?e.search:"")),e.href=e.format(),e}if(!d.length)return e.pathname=null,e.search?e.path="/"+e.search:e.path=null,e.href=e.format(),e;for(var O=d.slice(-1)[0],j=(e.host||t.host||d.length>1)&&("."===O||".."===O)||""===O,x=0,U=d.length;U>=0;U--)O=d[U],"."===O?d.splice(U,1):".."===O?(d.splice(U,1),x++):x&&(d.splice(U,1),x--);if(!y&&!P)for(;x--;x)d.unshift("..");!y||""===d[0]||d[0]&&"/"===d[0].charAt(0)||d.unshift(""),j&&"/"!==d.join("/").substr(-1)&&d.push("");var C=""===d[0]||d[0]&&"/"===d[0].charAt(0);if(q){e.hostname=e.host=C?"":d.length?d.shift():"";var b=e.host&&e.host.indexOf("@")>0?e.host.split("@"):!1;b&&(e.auth=b.shift(),e.host=e.hostname=b.shift())}return y=y||e.host&&d.length,y&&!C&&d.unshift(""),d.length?e.pathname=d.join("/"):(e.pathname=null,e.path=null),util.isNull(e.pathname)&&util.isNull(e.search)||(e.path=(e.pathname?e.pathname:"")+(e.search?e.search:"")),e.auth=t.auth||e.auth,e.slashes=e.slashes||t.slashes,e.href=e.format(),e},Url.prototype.parseHost=function(){var t=this.host,s=portPattern.exec(t);s&&(s=s[0],":"!==s&&(this.port=s.substr(1)),t=t.substr(0,t.length-s.length)),t&&(this.hostname=t)};
 
-},{"punycode":68,"querystring":71}],91:[function(require,module,exports){
+},{"./util":89,"punycode":68,"querystring":71}],89:[function(require,module,exports){
+"use strict";module.exports={isString:function(n){return"string"==typeof n},isObject:function(n){return"object"==typeof n&&null!==n},isNull:function(n){return null===n},isNullOrUndefined:function(n){return null==n}};
+
+},{}],90:[function(require,module,exports){
 (function (global){
 function deprecate(r,e){function o(){if(!t){if(config("throwDeprecation"))throw new Error(e);config("traceDeprecation")?console.trace(e):console.warn(e),t=!0}return r.apply(this,arguments)}if(config("noDeprecation"))return r;var t=!1;return o}function config(r){try{if(!global.localStorage)return!1}catch(e){return!1}var o=global.localStorage[r];return null==o?!1:"true"===String(o).toLowerCase()}module.exports=deprecate;
 
 }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{}],92:[function(require,module,exports){
+},{}],91:[function(require,module,exports){
 module.exports=function(o){return o&&"object"==typeof o&&"function"==typeof o.copy&&"function"==typeof o.fill&&"function"==typeof o.readUInt8};
 
-},{}],93:[function(require,module,exports){
+},{}],92:[function(require,module,exports){
 (function (process,global){
 function inspect(e,r){var t={seen:[],stylize:stylizeNoColor};return arguments.length>=3&&(t.depth=arguments[2]),arguments.length>=4&&(t.colors=arguments[3]),isBoolean(r)?t.showHidden=r:r&&exports._extend(t,r),isUndefined(t.showHidden)&&(t.showHidden=!1),isUndefined(t.depth)&&(t.depth=2),isUndefined(t.colors)&&(t.colors=!1),isUndefined(t.customInspect)&&(t.customInspect=!0),t.colors&&(t.stylize=stylizeWithColor),formatValue(t,e,t.depth)}function stylizeWithColor(e,r){var t=inspect.styles[r];return t?"["+inspect.colors[t][0]+"m"+e+"["+inspect.colors[t][1]+"m":e}function stylizeNoColor(e,r){return e}function arrayToHash(e){var r={};return e.forEach(function(e,t){r[e]=!0}),r}function formatValue(e,r,t){if(e.customInspect&&r&&isFunction(r.inspect)&&r.inspect!==exports.inspect&&(!r.constructor||r.constructor.prototype!==r)){var n=r.inspect(t,e);return isString(n)||(n=formatValue(e,n,t)),n}var i=formatPrimitive(e,r);if(i)return i;var o=Object.keys(r),s=arrayToHash(o);if(e.showHidden&&(o=Object.getOwnPropertyNames(r)),isError(r)&&(o.indexOf("message")>=0||o.indexOf("description")>=0))return formatError(r);if(0===o.length){if(isFunction(r)){var u=r.name?": "+r.name:"";return e.stylize("[Function"+u+"]","special")}if(isRegExp(r))return e.stylize(RegExp.prototype.toString.call(r),"regexp");if(isDate(r))return e.stylize(Date.prototype.toString.call(r),"date");if(isError(r))return formatError(r)}var a="",c=!1,l=["{","}"];if(isArray(r)&&(c=!0,l=["[","]"]),isFunction(r)){var p=r.name?": "+r.name:"";a=" [Function"+p+"]"}if(isRegExp(r)&&(a=" "+RegExp.prototype.toString.call(r)),isDate(r)&&(a=" "+Date.prototype.toUTCString.call(r)),isError(r)&&(a=" "+formatError(r)),0===o.length&&(!c||0==r.length))return l[0]+a+l[1];if(0>t)return isRegExp(r)?e.stylize(RegExp.prototype.toString.call(r),"regexp"):e.stylize("[Object]","special");e.seen.push(r);var f;return f=c?formatArray(e,r,t,s,o):o.map(function(n){return formatProperty(e,r,t,s,n,c)}),e.seen.pop(),reduceToSingleString(f,a,l)}function formatPrimitive(e,r){if(isUndefined(r))return e.stylize("undefined","undefined");if(isString(r)){var t="'"+JSON.stringify(r).replace(/^"|"$/g,"").replace(/'/g,"\\'").replace(/\\"/g,'"')+"'";return e.stylize(t,"string")}return isNumber(r)?e.stylize(""+r,"number"):isBoolean(r)?e.stylize(""+r,"boolean"):isNull(r)?e.stylize("null","null"):void 0}function formatError(e){return"["+Error.prototype.toString.call(e)+"]"}function formatArray(e,r,t,n,i){for(var o=[],s=0,u=r.length;u>s;++s)hasOwnProperty(r,String(s))?o.push(formatProperty(e,r,t,n,String(s),!0)):o.push("");return i.forEach(function(i){i.match(/^\d+$/)||o.push(formatProperty(e,r,t,n,i,!0))}),o}function formatProperty(e,r,t,n,i,o){var s,u,a;if(a=Object.getOwnPropertyDescriptor(r,i)||{value:r[i]},a.get?u=a.set?e.stylize("[Getter/Setter]","special"):e.stylize("[Getter]","special"):a.set&&(u=e.stylize("[Setter]","special")),hasOwnProperty(n,i)||(s="["+i+"]"),u||(e.seen.indexOf(a.value)<0?(u=isNull(t)?formatValue(e,a.value,null):formatValue(e,a.value,t-1),u.indexOf("\n")>-1&&(u=o?u.split("\n").map(function(e){return"  "+e}).join("\n").substr(2):"\n"+u.split("\n").map(function(e){return"   "+e}).join("\n"))):u=e.stylize("[Circular]","special")),isUndefined(s)){if(o&&i.match(/^\d+$/))return u;s=JSON.stringify(""+i),s.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)?(s=s.substr(1,s.length-2),s=e.stylize(s,"name")):(s=s.replace(/'/g,"\\'").replace(/\\"/g,'"').replace(/(^"|"$)/g,"'"),s=e.stylize(s,"string"))}return s+": "+u}function reduceToSingleString(e,r,t){var n=0,i=e.reduce(function(e,r){return n++,r.indexOf("\n")>=0&&n++,e+r.replace(/\u001b\[\d\d?m/g,"").length+1},0);return i>60?t[0]+(""===r?"":r+"\n ")+" "+e.join(",\n  ")+" "+t[1]:t[0]+r+" "+e.join(", ")+" "+t[1]}function isArray(e){return Array.isArray(e)}function isBoolean(e){return"boolean"==typeof e}function isNull(e){return null===e}function isNullOrUndefined(e){return null==e}function isNumber(e){return"number"==typeof e}function isString(e){return"string"==typeof e}function isSymbol(e){return"symbol"==typeof e}function isUndefined(e){return void 0===e}function isRegExp(e){return isObject(e)&&"[object RegExp]"===objectToString(e)}function isObject(e){return"object"==typeof e&&null!==e}function isDate(e){return isObject(e)&&"[object Date]"===objectToString(e)}function isError(e){return isObject(e)&&("[object Error]"===objectToString(e)||e instanceof Error)}function isFunction(e){return"function"==typeof e}function isPrimitive(e){return null===e||"boolean"==typeof e||"number"==typeof e||"string"==typeof e||"symbol"==typeof e||"undefined"==typeof e}function objectToString(e){return Object.prototype.toString.call(e)}function pad(e){return 10>e?"0"+e.toString(10):e.toString(10)}function timestamp(){var e=new Date,r=[pad(e.getHours()),pad(e.getMinutes()),pad(e.getSeconds())].join(":");return[e.getDate(),months[e.getMonth()],r].join(" ")}function hasOwnProperty(e,r){return Object.prototype.hasOwnProperty.call(e,r)}var formatRegExp=/%[sdj%]/g;exports.format=function(e){if(!isString(e)){for(var r=[],t=0;t<arguments.length;t++)r.push(inspect(arguments[t]));return r.join(" ")}for(var t=1,n=arguments,i=n.length,o=String(e).replace(formatRegExp,function(e){if("%%"===e)return"%";if(t>=i)return e;switch(e){case"%s":return String(n[t++]);case"%d":return Number(n[t++]);case"%j":try{return JSON.stringify(n[t++])}catch(r){return"[Circular]"}default:return e}}),s=n[t];i>t;s=n[++t])o+=isNull(s)||!isObject(s)?" "+s:" "+inspect(s);return o},exports.deprecate=function(e,r){function t(){if(!n){if(process.throwDeprecation)throw new Error(r);process.traceDeprecation?console.trace(r):console.error(r),n=!0}return e.apply(this,arguments)}if(isUndefined(global.process))return function(){return exports.deprecate(e,r).apply(this,arguments)};if(process.noDeprecation===!0)return e;var n=!1;return t};var debugs={},debugEnviron;exports.debuglog=function(e){if(isUndefined(debugEnviron)&&(debugEnviron=process.env.NODE_DEBUG||""),e=e.toUpperCase(),!debugs[e])if(new RegExp("\\b"+e+"\\b","i").test(debugEnviron)){var r=process.pid;debugs[e]=function(){var t=exports.format.apply(exports,arguments);console.error("%s %d: %s",e,r,t)}}else debugs[e]=function(){};return debugs[e]},exports.inspect=inspect,inspect.colors={bold:[1,22],italic:[3,23],underline:[4,24],inverse:[7,27],white:[37,39],grey:[90,39],black:[30,39],blue:[34,39],cyan:[36,39],green:[32,39],magenta:[35,39],red:[31,39],yellow:[33,39]},inspect.styles={special:"cyan",number:"yellow","boolean":"yellow",undefined:"grey","null":"bold",string:"green",date:"magenta",regexp:"red"},exports.isArray=isArray,exports.isBoolean=isBoolean,exports.isNull=isNull,exports.isNullOrUndefined=isNullOrUndefined,exports.isNumber=isNumber,exports.isString=isString,exports.isSymbol=isSymbol,exports.isUndefined=isUndefined,exports.isRegExp=isRegExp,exports.isObject=isObject,exports.isDate=isDate,exports.isError=isError,exports.isFunction=isFunction,exports.isPrimitive=isPrimitive,exports.isBuffer=require("./support/isBuffer");var months=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];exports.log=function(){console.log("%s - %s",timestamp(),exports.format.apply(exports,arguments))},exports.inherits=require("inherits"),exports._extend=function(e,r){if(!r||!isObject(r))return e;for(var t=Object.keys(r),n=t.length;n--;)e[t[n]]=r[t[n]];return e};
 
 }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
 
-},{"./support/isBuffer":92,"_process":67,"inherits":30}],94:[function(require,module,exports){
-function extend(){for(var r={},e=0;e<arguments.length;e++){var n=arguments[e];for(var t in n)n.hasOwnProperty(t)&&(r[t]=n[t])}return r}module.exports=extend;
+},{"./support/isBuffer":91,"_process":67,"inherits":31}],93:[function(require,module,exports){
+function extend(){for(var r={},e=0;e<arguments.length;e++){var t=arguments[e];for(var n in t)hasOwnProperty.call(t,n)&&(r[n]=t[n])}return r}module.exports=extend;var hasOwnProperty=Object.prototype.hasOwnProperty;
 
 },{}]},{},[3])(3)
 });
diff --git a/dist/ref-parser.min.js.map b/dist/ref-parser.min.js.map
index 14b57347..89ffa542 100644
--- a/dist/ref-parser.min.js.map
+++ b/dist/ref-parser.min.js.map
@@ -19,6 +19,7 @@
     "../node_modules/browser-resolve/empty.js",
     "../node_modules/browserify/lib/_empty.js",
     "../node_modules/buffer/index.js",
+    "../node_modules/buffer/node_modules/isarray/index.js",
     "../node_modules/builtin-status-codes/browser.js",
     "../node_modules/call-me-maybe/index.js",
     "../node_modules/core-util-is/lib/util.js",
@@ -27,12 +28,11 @@
     "../node_modules/es6-promise/dist/es6-promise.js",
     "../node_modules/esprima/esprima.js",
     "../node_modules/events/events.js",
-    "../node_modules/foreach/index.js",
     "../node_modules/https-browserify/index.js",
     "../node_modules/ieee754/index.js",
-    "../node_modules/indexof/index.js",
+    "../node_modules/inherit/index.js",
+    "../node_modules/inherit/lib/inherit.js",
     "../node_modules/inherits/inherits_browser.js",
-    "../node_modules/is-array/index.js",
     "../node_modules/is-buffer/index.js",
     "../node_modules/isarray/index.js",
     "../node_modules/js-yaml/index.js",
@@ -88,25 +88,24 @@
     "../node_modules/stream-http/lib/capability.js",
     "../node_modules/stream-http/lib/request.js",
     "../node_modules/stream-http/lib/response.js",
-    "../node_modules/stream-http/node_modules/object-keys/index.js",
-    "../node_modules/stream-http/node_modules/object-keys/isArguments.js",
     "../node_modules/string_decoder/index.js",
     "../node_modules/url/url.js",
+    "../node_modules/url/util.js",
     "../node_modules/util-deprecate/browser.js",
     "../node_modules/util/support/isBufferBrowser.js",
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   "file": "generated.js",
   "sourceRoot": "",
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     "(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})",
-    "/** !\n * JSON Schema $Ref Parser v1.4.0\n *\n * @link https://github.com/BigstickCarpet/json-schema-ref-parser\n * @license MIT\n */\n'use strict';\n\nvar $Ref    = require('./ref'),\n    Pointer = require('./pointer'),\n    util    = require('./util'),\n    url     = require('url');\n\nmodule.exports = bundle;\n\n/**\n * Bundles all external JSON references into the main JSON schema, thus resulting in a schema that\n * only has *internal* references, not any *external* references.\n * This method mutates the JSON schema object, adding new references and re-mapping existing ones.\n *\n * @param {$RefParser} parser\n * @param {$RefParserOptions} options\n */\nfunction bundle(parser, options) {\n  util.debug('Bundling $ref pointers in %s', parser._basePath);\n\n  remap(parser.$refs, options);\n  dereference(parser._basePath, parser.$refs, options);\n}\n\n/**\n * Re-maps all $ref pointers in the schema, so that they are relative to the root of the schema.\n *\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n */\nfunction remap($refs, options) {\n  var remapped = [];\n\n  // Crawl the schema and determine the re-mapped values for all $ref pointers.\n  // NOTE: We don't actually APPLY the re-mappings them yet, since that can affect other re-mappings\n  Object.keys($refs._$refs).forEach(function(key) {\n    var $ref = $refs._$refs[key];\n    crawl($ref.value, $ref.path + '#', $refs, remapped, options);\n  });\n\n  // Now APPLY all of the re-mappings\n  for (var i = 0; i < remapped.length; i++) {\n    var mapping = remapped[i];\n    mapping.old.$ref = mapping.new.$ref;\n  }\n}\n\n/**\n * Recursively crawls the given value, and re-maps any JSON references.\n *\n * @param {*} obj - The value to crawl. If it's not an object or array, it will be ignored.\n * @param {string} path - The path to use for resolving relative JSON references\n * @param {$Refs} $refs - The resolved JSON references\n * @param {object[]} remapped - An array of the re-mapped JSON references\n * @param {$RefParserOptions} options\n */\nfunction crawl(obj, path, $refs, remapped, options) {\n  if (obj && typeof obj === 'object') {\n    Object.keys(obj).forEach(function(key) {\n      var keyPath = Pointer.join(path, key);\n      var value = obj[key];\n\n      if ($Ref.is$Ref(value)) {\n        // We found a $ref, so resolve it\n        util.debug('Re-mapping $ref pointer \"%s\" at %s', value.$ref, keyPath);\n        var $refPath = url.resolve(path, value.$ref);\n        var pointer = $refs._resolve($refPath, options);\n\n        // Re-map the value\n        var new$RefPath = pointer.$ref.pathFromRoot + util.path.getHash(pointer.path).substr(1);\n        util.debug('    new value: %s', new$RefPath);\n        remapped.push({\n          old: value,\n          new: {$ref: new$RefPath}\n        });\n      }\n      else {\n        crawl(value, keyPath, $refs, remapped, options);\n      }\n    });\n  }\n}\n\n/**\n * Dereferences each external $ref pointer exactly ONCE.\n *\n * @param {string} basePath\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n */\nfunction dereference(basePath, $refs, options) {\n  basePath = util.path.stripHash(basePath);\n\n  Object.keys($refs._$refs).forEach(function(key) {\n    var $ref = $refs._$refs[key];\n    if ($ref.pathFromRoot !== '#') {\n      $refs.set(basePath + $ref.pathFromRoot, $ref.value, options);\n    }\n  });\n}\n",
+    "/** !\n * JSON Schema $Ref Parser v1.4.1\n *\n * @link https://github.com/BigstickCarpet/json-schema-ref-parser\n * @license MIT\n */\n'use strict';\n\nvar $Ref    = require('./ref'),\n    Pointer = require('./pointer'),\n    util    = require('./util'),\n    url     = require('url');\n\nmodule.exports = bundle;\n\n/**\n * Bundles all external JSON references into the main JSON schema, thus resulting in a schema that\n * only has *internal* references, not any *external* references.\n * This method mutates the JSON schema object, adding new references and re-mapping existing ones.\n *\n * @param {$RefParser} parser\n * @param {$RefParserOptions} options\n */\nfunction bundle(parser, options) {\n  util.debug('Bundling $ref pointers in %s', parser._basePath);\n\n  remap(parser.$refs, options);\n  dereference(parser._basePath, parser.$refs, options);\n}\n\n/**\n * Re-maps all $ref pointers in the schema, so that they are relative to the root of the schema.\n *\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n */\nfunction remap($refs, options) {\n  var remapped = [];\n\n  // Crawl the schema and determine the re-mapped values for all $ref pointers.\n  // NOTE: We don't actually APPLY the re-mappings them yet, since that can affect other re-mappings\n  Object.keys($refs._$refs).forEach(function(key) {\n    var $ref = $refs._$refs[key];\n    crawl($ref.value, $ref.path + '#', $refs, remapped, options);\n  });\n\n  // Now APPLY all of the re-mappings\n  for (var i = 0; i < remapped.length; i++) {\n    var mapping = remapped[i];\n    mapping.old$Ref.$ref = mapping.new$Ref.$ref;\n  }\n}\n\n/**\n * Recursively crawls the given value, and re-maps any JSON references.\n *\n * @param {*} obj - The value to crawl. If it's not an object or array, it will be ignored.\n * @param {string} path - The path to use for resolving relative JSON references\n * @param {$Refs} $refs - The resolved JSON references\n * @param {object[]} remapped - An array of the re-mapped JSON references\n * @param {$RefParserOptions} options\n */\nfunction crawl(obj, path, $refs, remapped, options) {\n  if (obj && typeof obj === 'object') {\n    Object.keys(obj).forEach(function(key) {\n      var keyPath = Pointer.join(path, key);\n      var value = obj[key];\n\n      if ($Ref.is$Ref(value)) {\n        // We found a $ref, so resolve it\n        util.debug('Re-mapping $ref pointer \"%s\" at %s', value.$ref, keyPath);\n        var $refPath = url.resolve(path, value.$ref);\n        var pointer = $refs._resolve($refPath, options);\n\n        // Re-map the value\n        var new$RefPath = pointer.$ref.pathFromRoot + util.path.getHash(pointer.path).substr(1);\n        util.debug('    new value: %s', new$RefPath);\n        remapped.push({\n          old$Ref: value,\n          new$Ref: {$ref: new$RefPath}  // Note: DON'T name this property `new` (https://github.com/BigstickCarpet/json-schema-ref-parser/issues/3)\n        });\n      }\n      else {\n        crawl(value, keyPath, $refs, remapped, options);\n      }\n    });\n  }\n}\n\n/**\n * Dereferences each external $ref pointer exactly ONCE.\n *\n * @param {string} basePath\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n */\nfunction dereference(basePath, $refs, options) {\n  basePath = util.path.stripHash(basePath);\n\n  Object.keys($refs._$refs).forEach(function(key) {\n    var $ref = $refs._$refs[key];\n    if ($ref.pathFromRoot !== '#') {\n      $refs.set(basePath + $ref.pathFromRoot, $ref.value, options);\n    }\n  });\n}\n",
     "'use strict';\n\nvar $Ref    = require('./ref'),\n    Pointer = require('./pointer'),\n    util    = require('./util'),\n    ono     = require('ono'),\n    url     = require('url');\n\nmodule.exports = dereference;\n\n/**\n * Crawls the JSON schema, finds all JSON references, and dereferences them.\n * This method mutates the JSON schema object, replacing JSON references with their resolved value.\n *\n * @param {$RefParser} parser\n * @param {$RefParserOptions} options\n */\nfunction dereference(parser, options) {\n  util.debug('Dereferencing $ref pointers in %s', parser._basePath);\n  parser.$refs.circular = false;\n  crawl(parser.schema, parser._basePath, [], parser.$refs, options);\n}\n\n/**\n * Recursively crawls the given value, and dereferences any JSON references.\n *\n * @param {*} obj - The value to crawl. If it's not an object or array, it will be ignored.\n * @param {string} path - The path to use for resolving relative JSON references\n * @param {object[]} parents - An array of the parent objects that have already been dereferenced\n * @param {$Refs} $refs - The resolved JSON references\n * @param {$RefParserOptions} options\n * @returns {boolean} - Returns true if a circular reference was found\n */\nfunction crawl(obj, path, parents, $refs, options) {\n  var isCircular = false;\n\n  if (obj && typeof obj === 'object') {\n    parents.push(obj);\n\n    Object.keys(obj).forEach(function(key) {\n      var keyPath = Pointer.join(path, key);\n      var value = obj[key];\n      var circular = false;\n\n      if ($Ref.isAllowed$Ref(value, options)) {\n        // We found a $ref, so resolve it\n        util.debug('Dereferencing $ref pointer \"%s\" at %s', value.$ref, keyPath);\n        var $refPath = url.resolve(path, value.$ref);\n        var pointer = $refs._resolve($refPath, options);\n\n        // Check for circular references\n        circular = pointer.circular || parents.indexOf(pointer.value) !== -1;\n        circular && foundCircularReference(keyPath, $refs, options);\n\n        // Dereference the JSON reference\n        var dereferencedValue = getDereferencedValue(value, pointer.value);\n\n        // Crawl the dereferenced value (unless it's circular)\n        if (!circular) {\n          // If the `crawl` method returns true, then dereferenced value is circular\n          circular = crawl(dereferencedValue, pointer.path, parents, $refs, options);\n        }\n\n        // Replace the JSON reference with the dereferenced value\n        if (!circular || options.$refs.circular === true) {\n          obj[key] = dereferencedValue;\n        }\n      }\n      else {\n        if (parents.indexOf(value) === -1) {\n          circular = crawl(value, keyPath, parents, $refs, options);\n        }\n        else {\n          circular = foundCircularReference(keyPath, $refs, options);\n        }\n      }\n\n      // Set the \"isCircular\" flag if this or any other property is circular\n      isCircular = isCircular || circular;\n    });\n\n    parents.pop();\n  }\n  return isCircular;\n}\n\n/**\n * Returns the dereferenced value of the given JSON reference.\n *\n * @param {object} currentValue - the current value, which contains a JSON reference (\"$ref\" property)\n * @param {*} resolvedValue - the resolved value, which can be any type\n * @returns {*} - Returns the dereferenced value\n */\nfunction getDereferencedValue(currentValue, resolvedValue) {\n  if (resolvedValue && typeof resolvedValue === 'object' && Object.keys(currentValue).length > 1) {\n    // The current value has additional properties (other than \"$ref\"),\n    // so merge the resolved value rather than completely replacing the reference\n    var merged = {};\n    Object.keys(currentValue).forEach(function(key) {\n      if (key !== '$ref') {\n        merged[key] = currentValue[key];\n      }\n    });\n    Object.keys(resolvedValue).forEach(function(key) {\n      if (!(key in merged)) {\n        merged[key] = resolvedValue[key];\n      }\n    });\n    return merged;\n  }\n  else {\n    // Completely replace the original reference with the resolved value\n    return resolvedValue;\n  }\n}\n\n/**\n * Called when a circular reference is found.\n * It sets the {@link $Refs#circular} flag, and throws an error if options.$refs.circular is false.\n *\n * @param {string} keyPath - The JSON Reference path of the circular reference\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n * @returns {boolean} - always returns true, to indicate that a circular reference was found\n */\nfunction foundCircularReference(keyPath, $refs, options) {\n  $refs.circular = true;\n  if (!options.$refs.circular) {\n    throw ono.reference('Circular $ref pointer found at %s', keyPath);\n  }\n  return true;\n}\n",
     "'use strict';\n\nvar Promise     = require('./promise'),\n    Options     = require('./options'),\n    $Refs       = require('./refs'),\n    $Ref        = require('./ref'),\n    read        = require('./read'),\n    resolve     = require('./resolve'),\n    bundle      = require('./bundle'),\n    dereference = require('./dereference'),\n    util        = require('./util'),\n    url         = require('url'),\n    maybe       = require('call-me-maybe'),\n    ono         = require('ono');\n\nmodule.exports = $RefParser;\nmodule.exports.YAML = require('./yaml');\n\n/**\n * This class parses a JSON schema, builds a map of its JSON references and their resolved values,\n * and provides methods for traversing, manipulating, and dereferencing those references.\n *\n * @constructor\n */\nfunction $RefParser() {\n  /**\n   * The parsed (and possibly dereferenced) JSON schema object\n   *\n   * @type {object}\n   * @readonly\n   */\n  this.schema = null;\n\n  /**\n   * The resolved JSON references\n   *\n   * @type {$Refs}\n   */\n  this.$refs = new $Refs();\n\n  /**\n   * The file path or URL of the main JSON schema file.\n   * This will be empty if the schema was passed as an object rather than a path.\n   *\n   * @type {string}\n   * @protected\n   */\n  this._basePath = '';\n}\n\n/**\n * Parses the given JSON schema.\n * This method does not resolve any JSON references.\n * It just reads a single file in JSON or YAML format, and parse it as a JavaScript object.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed\n * @param {function} [callback] - An error-first callback. The second parameter is the parsed JSON schema object.\n * @returns {Promise} - The returned promise resolves with the parsed JSON schema object.\n */\n$RefParser.parse = function(schema, options, callback) {\n  var Class = this; // eslint-disable-line consistent-this\n  return new Class().parse(schema, options, callback);\n};\n\n/**\n * Parses the given JSON schema.\n * This method does not resolve any JSON references.\n * It just reads a single file in JSON or YAML format, and parse it as a JavaScript object.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed\n * @param {function} [callback] - An error-first callback. The second parameter is the parsed JSON schema object.\n * @returns {Promise} - The returned promise resolves with the parsed JSON schema object.\n */\n$RefParser.prototype.parse = function(schema, options, callback) {\n  var args = normalizeArgs(arguments);\n\n  if (args.schema && typeof args.schema === 'object') {\n    // The schema is an object, not a path/url\n    this.schema = args.schema;\n    this._basePath = '';\n    var $ref = new $Ref(this.$refs, this._basePath);\n    $ref.setValue(this.schema, args.options);\n\n    return maybe(args.callback, Promise.resolve(this.schema));\n  }\n\n  if (!args.schema || typeof args.schema !== 'string') {\n    var err = ono('Expected a file path, URL, or object. Got %s', args.schema);\n    return maybe(args.callback, Promise.reject(err));\n  }\n\n  var me = this;\n\n  // Resolve the absolute path of the schema\n  args.schema = util.path.localPathToUrl(args.schema);\n  args.schema = url.resolve(util.path.cwd(), args.schema);\n  this._basePath = util.path.stripHash(args.schema);\n\n  // Read the schema file/url\n  return read(args.schema, this.$refs, args.options)\n    .then(function(cached$Ref) {\n      var value = cached$Ref.$ref.value;\n      if (!value || typeof value !== 'object' || value instanceof Buffer) {\n        throw ono.syntax('\"%s\" is not a valid JSON Schema', me._basePath);\n      }\n      else {\n        me.schema = value;\n        return maybe(args.callback, Promise.resolve(me.schema));\n      }\n    })\n    .catch(function(e) {\n      return maybe(args.callback, Promise.reject(e));\n    });\n};\n\n/**\n * Parses the given JSON schema and resolves any JSON references, including references in\n * externally-referenced files.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed and resolved\n * @param {function} [callback]\n * - An error-first callback. The second parameter is a {@link $Refs} object containing the resolved JSON references\n *\n * @returns {Promise}\n * The returned promise resolves with a {@link $Refs} object containing the resolved JSON references\n */\n$RefParser.resolve = function(schema, options, callback) {\n  var Class = this; // eslint-disable-line consistent-this\n  return new Class().resolve(schema, options, callback);\n};\n\n/**\n * Parses the given JSON schema and resolves any JSON references, including references in\n * externally-referenced files.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed and resolved\n * @param {function} [callback]\n * - An error-first callback. The second parameter is a {@link $Refs} object containing the resolved JSON references\n *\n * @returns {Promise}\n * The returned promise resolves with a {@link $Refs} object containing the resolved JSON references\n */\n$RefParser.prototype.resolve = function(schema, options, callback) {\n  var me = this;\n  var args = normalizeArgs(arguments);\n\n  return this.parse(args.schema, args.options)\n    .then(function() {\n      return resolve(me, args.options);\n    })\n    .then(function() {\n      return maybe(args.callback, Promise.resolve(me.$refs));\n    })\n    .catch(function(err) {\n      return maybe(args.callback, Promise.reject(err));\n    });\n};\n\n/**\n * Parses the given JSON schema, resolves any JSON references, and bundles all external references\n * into the main JSON schema. This produces a JSON schema that only has *internal* references,\n * not any *external* references.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed, resolved, and dereferenced\n * @param {function} [callback] - An error-first callback. The second parameter is the bundled JSON schema object\n * @returns {Promise} - The returned promise resolves with the bundled JSON schema object.\n */\n$RefParser.bundle = function(schema, options, callback) {\n  var Class = this; // eslint-disable-line consistent-this\n  return new Class().bundle(schema, options, callback);\n};\n\n/**\n * Parses the given JSON schema, resolves any JSON references, and bundles all external references\n * into the main JSON schema. This produces a JSON schema that only has *internal* references,\n * not any *external* references.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed, resolved, and dereferenced\n * @param {function} [callback] - An error-first callback. The second parameter is the bundled JSON schema object\n * @returns {Promise} - The returned promise resolves with the bundled JSON schema object.\n */\n$RefParser.prototype.bundle = function(schema, options, callback) {\n  var me = this;\n  var args = normalizeArgs(arguments);\n\n  return this.resolve(args.schema, args.options)\n    .then(function() {\n      bundle(me, args.options);\n      return maybe(args.callback, Promise.resolve(me.schema));\n    })\n    .catch(function(err) {\n      return maybe(args.callback, Promise.reject(err));\n    });\n};\n\n/**\n * Parses the given JSON schema, resolves any JSON references, and dereferences the JSON schema.\n * That is, all JSON references are replaced with their resolved values.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed, resolved, and dereferenced\n * @param {function} [callback] - An error-first callback. The second parameter is the dereferenced JSON schema object\n * @returns {Promise} - The returned promise resolves with the dereferenced JSON schema object.\n */\n$RefParser.dereference = function(schema, options, callback) {\n  var Class = this; // eslint-disable-line consistent-this\n  return new Class().dereference(schema, options, callback);\n};\n\n/**\n * Parses the given JSON schema, resolves any JSON references, and dereferences the JSON schema.\n * That is, all JSON references are replaced with their resolved values.\n *\n * @param {string|object} schema - The file path or URL of the JSON schema. Or a JSON schema object.\n * @param {$RefParserOptions} [options] - Options that determine how the schema is parsed, resolved, and dereferenced\n * @param {function} [callback] - An error-first callback. The second parameter is the dereferenced JSON schema object\n * @returns {Promise} - The returned promise resolves with the dereferenced JSON schema object.\n */\n$RefParser.prototype.dereference = function(schema, options, callback) {\n  var me = this;\n  var args = normalizeArgs(arguments);\n\n  return this.resolve(args.schema, args.options)\n    .then(function() {\n      dereference(me, args.options);\n      return maybe(args.callback, Promise.resolve(me.schema));\n    })\n    .catch(function(err) {\n      return maybe(args.callback, Promise.reject(err));\n    });\n};\n\n/**\n * Normalizes the given arguments, accounting for optional args.\n *\n * @param {Arguments} args\n * @returns {object}\n */\nfunction normalizeArgs(args) {\n  var options = args[1], callback = args[2];\n  if (typeof options === 'function') {\n    callback = options;\n    options = undefined;\n  }\n  if (!(options instanceof Options)) {\n    options = new Options(options);\n  }\n  return {\n    schema: args[0],\n    options: options,\n    callback: callback\n  };\n}\n",
-    "/* eslint lines-around-comment: [2, {beforeBlockComment: false}] */\n'use strict';\n\nmodule.exports = $RefParserOptions;\n\n/**\n * Options that determine how JSON schemas are parsed, dereferenced, and cached.\n *\n * @param {object|$RefParserOptions} [options] - Overridden options\n * @constructor\n */\nfunction $RefParserOptions(options) {\n  /**\n   * Determines what types of files can be parsed\n   */\n  this.allow = {\n    /**\n     * Are JSON files allowed?\n     * If false, then all schemas must be in YAML format.\n     * @type {boolean}\n     */\n    json: true,\n\n    /**\n     * Are YAML files allowed?\n     * If false, then all schemas must be in JSON format.\n     * @type {boolean}\n     */\n    yaml: true,\n\n    /**\n     * Are zero-byte files allowed?\n     * If false, then an error will be thrown if a file is empty.\n     * @type {boolean}\n     */\n    empty: true,\n\n    /**\n     * Can unknown file types be $referenced?\n     * If true, then they will be parsed as Buffers (byte arrays).\n     * If false, then an error will be thrown.\n     * @type {boolean}\n     */\n    unknown: true\n  };\n\n  /**\n   * Determines the types of JSON references that are allowed.\n   */\n  this.$refs = {\n    /**\n     * Allow JSON references to other parts of the same file?\n     * @type {boolean}\n     */\n    internal: true,\n\n    /**\n     * Allow JSON references to external files/URLs?\n     * @type {boolean}\n     */\n    external: true,\n\n    /**\n     * Allow circular (recursive) JSON references?\n     * If false, then a {@link ReferenceError} will be thrown if a circular reference is found.\n     * If \"ignore\", then circular references will not be dereferenced.\n     * @type {boolean|string}\n     */\n    circular: true\n  };\n\n  /**\n   * How long to cache files (in seconds).\n   */\n  this.cache = {\n    /**\n     * How long to cache local files, in seconds.\n     * @type {number}\n     */\n    fs: 60, // 1 minute\n\n    /**\n     * How long to cache files downloaded via HTTP, in seconds.\n     * @type {number}\n     */\n    http: 5 * 60, // 5 minutes\n\n    /**\n     * How long to cache files downloaded via HTTPS, in seconds.\n     * @type {number}\n     */\n    https: 5 * 60 // 5 minutes\n  };\n\n  /* http options */\n  this.http = {\n    /* withCredentials option of XMLHttpRequest */\n    withCredentials: true\n  }\n\n  merge(options, this);\n}\n\n/**\n * Fast, two-level object merge.\n *\n * @param {?object} src - The object to merge into dest\n * @param {object} dest - The object to be modified\n */\nfunction merge(src, dest) {\n  if (src) {\n    var topKeys = Object.keys(src);\n    for (var i = 0; i < topKeys.length; i++) {\n      var topKey = topKeys[i];\n      var srcChild = src[topKey];\n      if (dest[topKey] === undefined) {\n        dest[topKey] = srcChild;\n      }\n      else {\n        var childKeys = Object.keys(srcChild);\n        for (var j = 0; j < childKeys.length; j++) {\n          var childKey = childKeys[j];\n          var srcChildValue = srcChild[childKey];\n          if (srcChildValue !== undefined) {\n            dest[topKey][childKey] = srcChildValue;\n          }\n        }\n      }\n    }\n  }\n}\n",
+    "/* eslint lines-around-comment: [2, {beforeBlockComment: false}] */\n'use strict';\n\nmodule.exports = $RefParserOptions;\n\n/**\n * Options that determine how JSON schemas are parsed, dereferenced, and cached.\n *\n * @param {object|$RefParserOptions} [options] - Overridden options\n * @constructor\n */\nfunction $RefParserOptions(options) {\n  /**\n   * Determines what types of files can be parsed\n   */\n  this.allow = {\n    /**\n     * Are JSON files allowed?\n     * If false, then all schemas must be in YAML format.\n     * @type {boolean}\n     */\n    json: true,\n\n    /**\n     * Are YAML files allowed?\n     * If false, then all schemas must be in JSON format.\n     * @type {boolean}\n     */\n    yaml: true,\n\n    /**\n     * Are zero-byte files allowed?\n     * If false, then an error will be thrown if a file is empty.\n     * @type {boolean}\n     */\n    empty: true,\n\n    /**\n     * Can unknown file types be $referenced?\n     * If true, then they will be parsed as Buffers (byte arrays).\n     * If false, then an error will be thrown.\n     * @type {boolean}\n     */\n    unknown: true\n  };\n\n  /**\n   * Determines the types of JSON references that are allowed.\n   */\n  this.$refs = {\n    /**\n     * Allow JSON references to other parts of the same file?\n     * @type {boolean}\n     */\n    internal: true,\n\n    /**\n     * Allow JSON references to external files/URLs?\n     * @type {boolean}\n     */\n    external: true,\n\n    /**\n     * Allow circular (recursive) JSON references?\n     * If false, then a {@link ReferenceError} will be thrown if a circular reference is found.\n     * If \"ignore\", then circular references will not be dereferenced.\n     * @type {boolean|string}\n     */\n    circular: true\n  };\n\n  /**\n   * How long to cache files (in seconds).\n   */\n  this.cache = {\n    /**\n     * How long to cache local files, in seconds.\n     * @type {number}\n     */\n    fs: 60, // 1 minute\n\n    /**\n     * How long to cache files downloaded via HTTP, in seconds.\n     * @type {number}\n     */\n    http: 5 * 60, // 5 minutes\n\n    /**\n     * How long to cache files downloaded via HTTPS, in seconds.\n     * @type {number}\n     */\n    https: 5 * 60 // 5 minutes\n  };\n\n  /**\n   * HTTP request options\n   */\n  this.http = {\n    /**\n     * The `withCredentials` option of XMLHttpRequest.\n     * Set this to `true` if you're downloading files from a CORS-enabled server that requires authentication\n     */\n    withCredentials: false\n  };\n\n  merge(options, this);\n}\n\n/**\n * Fast, two-level object merge.\n *\n * @param {?object} src - The object to merge into dest\n * @param {object} dest - The object to be modified\n */\nfunction merge(src, dest) {\n  if (src) {\n    var topKeys = Object.keys(src);\n    for (var i = 0; i < topKeys.length; i++) {\n      var topKey = topKeys[i];\n      var srcChild = src[topKey];\n      if (dest[topKey] === undefined) {\n        dest[topKey] = srcChild;\n      }\n      else {\n        var childKeys = Object.keys(srcChild);\n        for (var j = 0; j < childKeys.length; j++) {\n          var childKey = childKeys[j];\n          var srcChildValue = srcChild[childKey];\n          if (srcChildValue !== undefined) {\n            dest[topKey][childKey] = srcChildValue;\n          }\n        }\n      }\n    }\n  }\n}\n",
     "'use strict';\n\nvar YAML = require('./yaml'),\n    util = require('./util'),\n    ono  = require('ono');\n\nmodule.exports = parse;\n\n/**\n * Parses the given data as YAML, JSON, or a raw Buffer (byte array), depending on the options.\n *\n * @param {string|Buffer} data - The data to be parsed\n * @param {string} path - The file path or URL that `data` came from\n * @param {$RefParserOptions} options\n *\n * @returns {string|Buffer|object}\n * If `data` can be parsed as YAML or JSON, then the returned value is a JavaScript object.\n * Otherwise, the returned value is the raw string or Buffer that was passed in.\n */\nfunction parse(data, path, options) {\n  var parsed;\n\n  try {\n    if (options.allow.yaml) {\n      util.debug('Parsing YAML file: %s', path);\n      parsed = YAML.parse(data.toString());\n      util.debug('    Parsed successfully');\n    }\n    else if (options.allow.json) {\n      util.debug('Parsing JSON file: %s', path);\n      parsed = JSON.parse(data.toString());\n      util.debug('    Parsed successfully');\n    }\n    else {\n      parsed = data;\n    }\n  }\n  catch (e) {\n    var ext = util.path.extname(path);\n    if (options.allow.unknown && ['.json', '.yaml', '.yml'].indexOf(ext) === -1) {\n      // It's not a YAML or JSON file, and unknown formats are allowed,\n      // so ignore the parsing error and just return the raw data\n      util.debug('    Unknown file format. Not parsed.');\n      parsed = data;\n    }\n    else {\n      throw ono.syntax(e, 'Error parsing \"%s\"', path);\n    }\n  }\n\n  if (isEmpty(parsed) && !options.allow.empty) {\n    throw ono.syntax('Error parsing \"%s\". \\nParsed value is empty', path);\n  }\n\n  return parsed;\n}\n\n/**\n * Determines whether the parsed value is \"empty\".\n *\n * @param {*} value\n * @returns {boolean}\n */\nfunction isEmpty(value) {\n  return !value ||\n    (typeof value === 'object' && Object.keys(value).length === 0) ||\n    (typeof value === 'string' && value.trim().length === 0) ||\n    (value instanceof Buffer && value.length === 0);\n}\n",
     "'use strict';\n\nmodule.exports = Pointer;\n\nvar $Ref         = require('./ref'),\n    util         = require('./util'),\n    url          = require('url'),\n    ono          = require('ono'),\n    slashes      = /\\//g,\n    tildes       = /~/g,\n    escapedSlash = /~1/g,\n    escapedTilde = /~0/g;\n\n/**\n * This class represents a single JSON pointer and its resolved value.\n *\n * @param {$Ref} $ref\n * @param {string} path\n * @constructor\n */\nfunction Pointer($ref, path) {\n  /**\n   * The {@link $Ref} object that contains this {@link Pointer} object.\n   * @type {$Ref}\n   */\n  this.$ref = $ref;\n\n  /**\n   * The file path or URL, containing the JSON pointer in the hash.\n   * This path is relative to the path of the main JSON schema file.\n   * @type {string}\n   */\n  this.path = path;\n\n  /**\n   * The value of the JSON pointer.\n   * Can be any JSON type, not just objects. Unknown file types are represented as Buffers (byte arrays).\n   * @type {?*}\n   */\n  this.value = undefined;\n\n  /**\n   * Indicates whether the pointer is references itself.\n   * @type {boolean}\n   */\n  this.circular = false;\n}\n\n/**\n * Resolves the value of a nested property within the given object.\n *\n * @param {*} obj - The object that will be crawled\n * @param {$RefParserOptions} [options]\n *\n * @returns {Pointer}\n * Returns a JSON pointer whose {@link Pointer#value} is the resolved value.\n * If resolving this value required resolving other JSON references, then\n * the {@link Pointer#$ref} and {@link Pointer#path} will reflect the resolution path\n * of the resolved value.\n */\nPointer.prototype.resolve = function(obj, options) {\n  var tokens = Pointer.parse(this.path);\n\n  // Crawl the object, one token at a time\n  this.value = obj;\n  for (var i = 0; i < tokens.length; i++) {\n    if (resolveIf$Ref(this, options)) {\n      // The $ref path has changed, so append the remaining tokens to the path\n      this.path = Pointer.join(this.path, tokens.slice(i));\n    }\n\n    var token = tokens[i];\n    if (this.value[token] === undefined) {\n      throw ono.syntax('Error resolving $ref pointer \"%s\". \\nToken \"%s\" does not exist.', this.path, token);\n    }\n    else {\n      this.value = this.value[token];\n    }\n  }\n\n  // Resolve the final value\n  resolveIf$Ref(this, options);\n  return this;\n};\n\n/**\n * Sets the value of a nested property within the given object.\n *\n * @param {*} obj - The object that will be crawled\n * @param {*} value - the value to assign\n * @param {$RefParserOptions} [options]\n *\n * @returns {*}\n * Returns the modified object, or an entirely new object if the entire object is overwritten.\n */\nPointer.prototype.set = function(obj, value, options) {\n  var tokens = Pointer.parse(this.path);\n  var token;\n\n  if (tokens.length === 0) {\n    // There are no tokens, replace the entire object with the new value\n    this.value = value;\n    return value;\n  }\n\n  // Crawl the object, one token at a time\n  this.value = obj;\n  for (var i = 0; i < tokens.length - 1; i++) {\n    resolveIf$Ref(this, options);\n\n    token = tokens[i];\n    if (this.value && this.value[token] !== undefined) {\n      // The token exists\n      this.value = this.value[token];\n    }\n    else {\n      // The token doesn't exist, so create it\n      this.value = setValue(this, token, {});\n    }\n  }\n\n  // Set the value of the final token\n  resolveIf$Ref(this, options);\n  token = tokens[tokens.length - 1];\n  setValue(this, token, value);\n\n  // Return the updated object\n  return obj;\n};\n\n/**\n * Parses a JSON pointer (or a path containing a JSON pointer in the hash)\n * and returns an array of the pointer's tokens.\n * (e.g. \"schema.json#/definitions/person/name\" => [\"definitions\", \"person\", \"name\"])\n *\n * The pointer is parsed according to RFC 6901\n * {@link https://tools.ietf.org/html/rfc6901#section-3}\n *\n * @param {string} path\n * @returns {string[]}\n */\nPointer.parse = function(path) {\n  // Get the JSON pointer from the path's hash\n  var pointer = util.path.getHash(path).substr(1);\n\n  // If there's no pointer, then there are no tokens,\n  // so return an empty array\n  if (!pointer) {\n    return [];\n  }\n\n  // Split into an array\n  pointer = pointer.split('/');\n\n  // Decode each part, according to RFC 6901\n  for (var i = 0; i < pointer.length; i++) {\n    pointer[i] = decodeURI(pointer[i].replace(escapedSlash, '/').replace(escapedTilde, '~'));\n  }\n\n  if (pointer[0] !== '') {\n    throw ono.syntax('Invalid $ref pointer \"%s\". Pointers must begin with \"#/\"', pointer);\n  }\n\n  return pointer.slice(1);\n};\n\n/**\n * Creates a JSON pointer path, by joining one or more tokens to a base path.\n *\n * @param {string} base - The base path (e.g. \"schema.json#/definitions/person\")\n * @param {string|string[]} tokens - The token(s) to append (e.g. [\"name\", \"first\"])\n * @returns {string}\n */\nPointer.join = function(base, tokens) {\n  // Ensure that the base path contains a hash\n  if (base.indexOf('#') === -1) {\n    base += '#';\n  }\n\n  // Append each token to the base path\n  tokens = Array.isArray(tokens) ? tokens : [tokens];\n  for (var i = 0; i < tokens.length; i++) {\n    var token = tokens[i];\n    // Encode the token, according to RFC 6901\n    base += '/' + encodeURI(token.replace(tildes, '~0').replace(slashes, '~1'));\n  }\n\n  return base;\n};\n\n/**\n * If the given pointer's {@link Pointer#value} is a JSON reference,\n * then the reference is resolved and {@link Pointer#value} is replaced with the resolved value.\n * In addition, {@link Pointer#path} and {@link Pointer#$ref} are updated to reflect the\n * resolution path of the new value.\n *\n * @param {Pointer} pointer\n * @param {$RefParserOptions} [options]\n * @returns {boolean} - Returns `true` if the resolution path changed\n */\nfunction resolveIf$Ref(pointer, options) {\n  // Is the value a JSON reference? (and allowed?)\n  if ($Ref.isAllowed$Ref(pointer.value, options)) {\n    var $refPath = url.resolve(pointer.path, pointer.value.$ref);\n\n    if ($refPath === pointer.path) {\n      // The value is a reference to itself, so there's nothing to do.\n      pointer.circular = true;\n    }\n    else {\n      // Does the JSON reference have other properties (other than \"$ref\")?\n      // If so, then don't resolve it, since it represents a new type\n      if (Object.keys(pointer.value).length === 1) {\n        // Resolve the reference\n        var resolved = pointer.$ref.$refs._resolve($refPath);\n        pointer.$ref = resolved.$ref;\n        pointer.path = resolved.path;\n        pointer.value = resolved.value;\n        return true;\n      }\n    }\n  }\n}\n\n/**\n * Sets the specified token value of the {@link Pointer#value}.\n *\n * The token is evaluated according to RFC 6901.\n * {@link https://tools.ietf.org/html/rfc6901#section-4}\n *\n * @param {Pointer} pointer - The JSON Pointer whose value will be modified\n * @param {string} token - A JSON Pointer token that indicates how to modify `obj`\n * @param {*} value - The value to assign\n * @returns {*} - Returns the assigned value\n */\nfunction setValue(pointer, token, value) {\n  if (pointer.value && typeof pointer.value === 'object') {\n    if (token === '-' && Array.isArray(pointer.value)) {\n      pointer.value.push(value);\n    }\n    else {\n      pointer.value[token] = value;\n    }\n  }\n  else {\n    throw ono.syntax('Error assigning $ref pointer \"%s\". \\nCannot set \"%s\" of a non-object.', pointer.path, token);\n  }\n  return value;\n}\n",
     "'use strict';\n\n/** @type {Promise} **/\nmodule.exports = typeof Promise === 'function' ? Promise : require('es6-promise').Promise;\n",
@@ -115,33 +114,33 @@
     "'use strict';\n\nvar Options = require('./options'),\n    util    = require('./util'),\n    ono     = require('ono');\n\nmodule.exports = $Refs;\n\n/**\n * This class is a map of JSON references and their resolved values.\n */\nfunction $Refs() {\n  /**\n   * Indicates whether the schema contains any circular references.\n   *\n   * @type {boolean}\n   */\n  this.circular = false;\n\n  /**\n   * A map of paths/urls to {@link $Ref} objects\n   *\n   * @type {object}\n   * @protected\n   */\n  this._$refs = {};\n}\n\n/**\n * Returns the paths of all the files/URLs that are referenced by the JSON schema,\n * including the schema itself.\n *\n * @param {...string|string[]} [types] - Only return paths of the given types (\"fs\", \"http\", \"https\")\n * @returns {string[]}\n */\n$Refs.prototype.paths = function(types) {\n  var paths = getPaths(this._$refs, arguments);\n  return paths.map(function(path) {\n    return path.decoded;\n  });\n};\n\n/**\n * Returns the map of JSON references and their resolved values.\n *\n * @param {...string|string[]} [types] - Only return references of the given types (\"fs\", \"http\", \"https\")\n * @returns {object}\n */\n$Refs.prototype.values = function(types) {\n  var $refs = this._$refs;\n  var paths = getPaths($refs, arguments);\n  return paths.reduce(function(obj, path) {\n    obj[path.decoded] = $refs[path.encoded].value;\n    return obj;\n  }, {});\n};\n\n/**\n * Returns a POJO (plain old JavaScript object) for serialization as JSON.\n *\n * @returns {object}\n */\n$Refs.prototype.toJSON = $Refs.prototype.values;\n\n/**\n * Determines whether the given JSON reference has expired.\n * Returns true if the reference does not exist.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n * @returns {boolean}\n */\n$Refs.prototype.isExpired = function(path) {\n  var $ref = this._get$Ref(path);\n  return $ref === undefined || $ref.isExpired();\n};\n\n/**\n * Immediately expires the given JSON reference.\n * If the reference does not exist, nothing happens.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n */\n$Refs.prototype.expire = function(path) {\n  var $ref = this._get$Ref(path);\n  if ($ref) {\n    $ref.expire();\n  }\n};\n\n/**\n * Determines whether the given JSON reference exists.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n * @returns {boolean}\n */\n$Refs.prototype.exists = function(path) {\n  try {\n    this._resolve(path);\n    return true;\n  }\n  catch (e) {\n    return false;\n  }\n};\n\n/**\n * Resolves the given JSON reference and returns the resolved value.\n *\n * @param {string} path - The full path being resolved, with a JSON pointer in the hash\n * @param {$RefParserOptions} options\n * @returns {*} - Returns the resolved value\n */\n$Refs.prototype.get = function(path, options) {\n  return this._resolve(path, options).value;\n};\n\n/**\n * Sets the value of a nested property within this {@link $Ref#value}.\n * If the property, or any of its parents don't exist, they will be created.\n *\n * @param {string} path - The full path of the property to set, optionally with a JSON pointer in the hash\n * @param {*} value - The value to assign\n * @param {$RefParserOptions} options\n */\n$Refs.prototype.set = function(path, value, options) {\n  var withoutHash = util.path.stripHash(path);\n  var $ref = this._$refs[withoutHash];\n\n  if (!$ref) {\n    throw ono('Error resolving $ref pointer \"%s\". \\n\"%s\" not found.', path, withoutHash);\n  }\n\n  options = new Options(options);\n  $ref.set(path, value, options);\n};\n\n/**\n * Resolves the given JSON reference.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n * @param {$RefParserOptions} options\n * @returns {Pointer}\n * @protected\n */\n$Refs.prototype._resolve = function(path, options) {\n  var withoutHash = util.path.stripHash(path);\n  var $ref = this._$refs[withoutHash];\n\n  if (!$ref) {\n    throw ono('Error resolving $ref pointer \"%s\". \\n\"%s\" not found.', path, withoutHash);\n  }\n\n  options = new Options(options);\n  return $ref.resolve(path, options);\n};\n\n/**\n * Returns the specified {@link $Ref} object, or undefined.\n *\n * @param {string} path - The full path being resolved, optionally with a JSON pointer in the hash\n * @returns {$Ref|undefined}\n * @protected\n */\n$Refs.prototype._get$Ref = function(path) {\n  var withoutHash = util.path.stripHash(path);\n  return this._$refs[withoutHash];\n};\n\n/**\n * Returns the encoded and decoded paths keys of the given object.\n *\n * @param {object} $refs - The object whose keys are URL-encoded paths\n * @param {...string|string[]} [types] - Only return paths of the given types (\"fs\", \"http\", \"https\")\n * @returns {object[]}\n */\nfunction getPaths($refs, types) {\n  var paths = Object.keys($refs);\n\n  // Filter the paths by type\n  types = Array.isArray(types[0]) ? types[0] : Array.prototype.slice.call(types);\n  if (types.length > 0 && types[0]) {\n    paths = paths.filter(function(key) {\n      return types.indexOf($refs[key].pathType) !== -1;\n    });\n  }\n\n  // Decode local filesystem paths\n  return paths.map(function(path) {\n    return {\n      encoded: path,\n      decoded: $refs[path].pathType === 'fs' ? util.path.urlToLocalPath(path) : path\n    };\n  });\n}\n",
     "'use strict';\n\nvar Promise = require('./promise'),\n    $Ref    = require('./ref'),\n    Pointer = require('./pointer'),\n    read    = require('./read'),\n    util    = require('./util'),\n    url     = require('url'),\n    ono     = require('ono');\n\nmodule.exports = resolve;\n\n/**\n * Crawls the JSON schema, finds all external JSON references, and resolves their values.\n * This method does not mutate the JSON schema. The resolved values are added to {@link $RefParser#$refs}.\n *\n * NOTE: We only care about EXTERNAL references here. INTERNAL references are only relevant when dereferencing.\n *\n * @param {$RefParser} parser\n * @param {$RefParserOptions} options\n *\n * @returns {Promise}\n * The promise resolves once all JSON references in the schema have been resolved,\n * including nested references that are contained in externally-referenced files.\n */\nfunction resolve(parser, options) {\n  try {\n    if (!options.$refs.external) {\n      // Nothing to resolve, so exit early\n      return Promise.resolve();\n    }\n\n    util.debug('Resolving $ref pointers in %s', parser._basePath);\n    var promises = crawl(parser.schema, parser._basePath + '#', '#', parser.$refs, options);\n    return Promise.all(promises);\n  }\n  catch (e) {\n    return Promise.reject(e);\n  }\n}\n\n/**\n * Recursively crawls the given value, and resolves any external JSON references.\n *\n * @param {*} obj - The value to crawl. If it's not an object or array, it will be ignored.\n * @param {string} path - The file path or URL used to resolve relative JSON references.\n * @param {string} pathFromRoot - The path to this point from the schema root\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n *\n * @returns {Promise[]}\n * Returns an array of promises. There will be one promise for each JSON reference in `obj`.\n * If `obj` does not contain any JSON references, then the array will be empty.\n * If any of the JSON references point to files that contain additional JSON references,\n * then the corresponding promise will internally reference an array of promises.\n */\nfunction crawl(obj, path, pathFromRoot, $refs, options) {\n  var promises = [];\n\n  if (obj && typeof obj === 'object') {\n    var keys = Object.keys(obj);\n\n    // If there's a \"definitions\" property, then crawl it FIRST.\n    // This is important when bundling, since the expected behavior\n    // is to bundle everything into definitions if possible.\n    var defs = keys.indexOf('definitions');\n    if (defs > 0) {\n      keys.splice(0, 0, keys.splice(defs, 1)[0]);\n    }\n\n    keys.forEach(function(key) {\n      var keyPath = Pointer.join(path, key);\n      var keyPathFromRoot = Pointer.join(pathFromRoot, key);\n      var value = obj[key];\n\n      if ($Ref.isExternal$Ref(value)) {\n        // We found a $ref\n        util.debug('Resolving $ref pointer \"%s\" at %s', value.$ref, keyPath);\n        var $refPath = url.resolve(path, value.$ref);\n\n        // Crawl the $referenced value\n        var promise = crawl$Ref($refPath, keyPathFromRoot, $refs, options)\n          .catch(function(err) {\n            throw ono.syntax(err, 'Error at %s', keyPath);\n          });\n        promises.push(promise);\n      }\n      else {\n        promises = promises.concat(crawl(value, keyPath, keyPathFromRoot, $refs, options));\n      }\n    });\n  }\n  return promises;\n}\n\n/**\n * Reads the file/URL at the given path, and then crawls the resulting value and resolves\n * any external JSON references.\n *\n * @param {string} path - The file path or URL to crawl\n * @param {string} pathFromRoot - The path to this point from the schema root\n * @param {$Refs} $refs\n * @param {$RefParserOptions} options\n *\n * @returns {Promise}\n * The promise resolves once all JSON references in the object have been resolved,\n * including nested references that are contained in externally-referenced files.\n */\nfunction crawl$Ref(path, pathFromRoot, $refs, options) {\n  return read(path, $refs, options)\n    .then(function(cached$Ref) {\n      // If a cached $ref is returned, then we DON'T need to crawl it\n      if (!cached$Ref.cached) {\n        var $ref = cached$Ref.$ref;\n\n        // This is a new $ref, so store the path from the root of the JSON schema to this $ref\n        $ref.pathFromRoot = pathFromRoot;\n\n        // Crawl the new $ref\n        util.debug('Resolving $ref pointers in %s', $ref.path);\n        var promises = crawl($ref.value, $ref.path + '#', pathFromRoot, $refs, options);\n        return Promise.all(promises);\n      }\n    });\n}\n",
     "'use strict';\n\nvar debug               = require('debug'),\n    isWindows           = /^win/.test(process.platform),\n    forwardSlashPattern = /\\//g,\n    protocolPattern     = /^[a-z0-9.+-]+:\\/\\//i;\n\n// RegExp patterns to URL-encode special characters in local filesystem paths\nvar urlEncodePatterns = [\n  /\\?/g, '%3F',\n  /\\#/g, '%23',\n  isWindows ? /\\\\/g : /\\//, '/'\n];\n\n// RegExp patterns to URL-decode special characters for local filesystem paths\nvar urlDecodePatterns = [\n  /\\%23/g, '#',\n  /\\%24/g, '$',\n  /\\%26/g, '&',\n  /\\%2C/g, ',',\n  /\\%40/g, '@'\n];\n\n/**\n * Writes messages to stdout.\n * Log messages are suppressed by default, but can be enabled by setting the DEBUG variable.\n * @type {function}\n */\nexports.debug = debug('json-schema-ref-parser');\n\n/**\n * Utility functions for working with paths and URLs.\n */\nexports.path = {};\n\n/**\n * Returns the current working directory (in Node) or the current page URL (in browsers).\n *\n * @returns {string}\n */\nexports.path.cwd = function cwd() {\n  return process.browser ? location.href : process.cwd() + '/';\n};\n\n/**\n * Determines whether the given path is a URL.\n *\n * @param   {string} path\n * @returns {boolean}\n */\nexports.path.isUrl = function isUrl(path) {\n  return protocolPattern.test(path);\n};\n\n/**\n * If the given path is a local filesystem path, it is converted to a URL.\n *\n * @param {string} path\n * @returns {string}\n */\nexports.path.localPathToUrl = function localPathToUrl(path) {\n  if (!process.browser && !exports.path.isUrl(path)) {\n    // Manually encode characters that are not encoded by `encodeURI`\n    for (var i = 0; i < urlEncodePatterns.length; i += 2) {\n      path = path.replace(urlEncodePatterns[i], urlEncodePatterns[i + 1]);\n    }\n    path = encodeURI(path);\n  }\n  return path;\n};\n\n/**\n * Converts a URL to a local filesystem path\n *\n * @param {string} url\n * @returns {string}\n */\nexports.path.urlToLocalPath = function urlToLocalPath(url) {\n  url = decodeURI(url);\n  // Manually decode characters that are not decoded by `decodeURI`\n  for (var i = 0; i < urlDecodePatterns.length; i += 2) {\n    url = url.replace(urlDecodePatterns[i], urlDecodePatterns[i + 1]);\n  }\n  if (isWindows) {\n    url = url.replace(forwardSlashPattern, '\\\\');\n  }\n  return url;\n};\n\n/**\n * Returns the hash (URL fragment), if any, of the given path.\n *\n * @param   {string} path\n * @returns {string}\n */\nexports.path.getHash = function getHash(path) {\n  var hashIndex = path.indexOf('#');\n  if (hashIndex >= 0) {\n    return path.substr(hashIndex);\n  }\n  return '';\n};\n\n/**\n * Removes the hash (URL fragment), if any, from the given path.\n *\n * @param   {string} path\n * @returns {string}\n */\nexports.path.stripHash = function stripHash(path) {\n  var hashIndex = path.indexOf('#');\n  if (hashIndex >= 0) {\n    path = path.substr(0, hashIndex);\n  }\n  return path;\n};\n\n/**\n * Returns the file extension of the given path.\n *\n * @param   {string} path\n * @returns {string}\n */\nexports.path.extname = function extname(path) {\n  var lastDot = path.lastIndexOf('.');\n  if (lastDot >= 0) {\n    return path.substr(lastDot).toLowerCase();\n  }\n  return '';\n};\n",
-    "/* eslint lines-around-comment: [2, {beforeBlockComment: false}] */\n'use strict';\n\nvar yaml = require('js-yaml');\n\n/**\n * Simple YAML parsing functions, similar to {@link JSON.parse} and {@link JSON.stringify}\n */\nmodule.exports = {\n  /**\n   * Parses a YAML string and returns the value.\n   *\n   * @param {string} text - The YAML string to be parsed\n   * @param {function} [reviver] - Not currently supported. Provided for consistency with {@link JSON.parse}\n   * @returns {*}\n   */\n  parse: function yamlParse(text, reviver) {\n    return yaml.safeLoad(text);\n  },\n\n  /**\n   * Converts a JavaScript value to a YAML string.\n   *\n   * @param   {*} value - The value to convert to YAML\n   * @param   {function|array} replacer - Not currently supported. Provided for consistency with {@link JSON.stringify}\n   * @param   {string|number} space - The number of spaces to use for indentation, or a string containing the number of spaces.\n   * @returns {string}\n   */\n  stringify: function yamlStringify(value, replacer, space) {\n    var indent = (typeof space === 'string' ? space.length : space) || 2;\n    return yaml.safeDump(value, {indent: indent});\n  }\n};\n",
+    "/* eslint lines-around-comment: [2, {beforeBlockComment: false}] */\n'use strict';\n\nvar yaml = require('js-yaml'),\n    ono  = require('ono');\n\n/**\n * Simple YAML parsing functions, similar to {@link JSON.parse} and {@link JSON.stringify}\n */\nmodule.exports = {\n  /**\n   * Parses a YAML string and returns the value.\n   *\n   * @param {string} text - The YAML string to be parsed\n   * @param {function} [reviver] - Not currently supported. Provided for consistency with {@link JSON.parse}\n   * @returns {*}\n   */\n  parse: function yamlParse(text, reviver) {\n    try {\n      return yaml.safeLoad(text);\n    }\n    catch (e) {\n      if (e instanceof Error) {\n        throw e;\n      }\n      else {\n        // https://github.com/nodeca/js-yaml/issues/153\n        throw ono(e, e.message);\n      }\n    }\n  },\n\n  /**\n   * Converts a JavaScript value to a YAML string.\n   *\n   * @param   {*} value - The value to convert to YAML\n   * @param   {function|array} replacer - Not currently supported. Provided for consistency with {@link JSON.stringify}\n   * @param   {string|number} space - The number of spaces to use for indentation, or a string containing the number of spaces.\n   * @returns {string}\n   */\n  stringify: function yamlStringify(value, replacer, space) {\n    try {\n      var indent = (typeof space === 'string' ? space.length : space) || 2;\n      return yaml.safeDump(value, {indent: indent});\n    }\n    catch (e) {\n      if (e instanceof Error) {\n        throw e;\n      }\n      else {\n        // https://github.com/nodeca/js-yaml/issues/153\n        throw ono(e, e.message);\n      }\n    }\n  }\n};\n",
     "var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';\n\n;(function (exports) {\n\t'use strict';\n\n  var Arr = (typeof Uint8Array !== 'undefined')\n    ? Uint8Array\n    : Array\n\n\tvar PLUS   = '+'.charCodeAt(0)\n\tvar SLASH  = '/'.charCodeAt(0)\n\tvar NUMBER = '0'.charCodeAt(0)\n\tvar LOWER  = 'a'.charCodeAt(0)\n\tvar UPPER  = 'A'.charCodeAt(0)\n\tvar PLUS_URL_SAFE = '-'.charCodeAt(0)\n\tvar SLASH_URL_SAFE = '_'.charCodeAt(0)\n\n\tfunction decode (elt) {\n\t\tvar code = elt.charCodeAt(0)\n\t\tif (code === PLUS ||\n\t\t    code === PLUS_URL_SAFE)\n\t\t\treturn 62 // '+'\n\t\tif (code === SLASH ||\n\t\t    code === SLASH_URL_SAFE)\n\t\t\treturn 63 // '/'\n\t\tif (code < NUMBER)\n\t\t\treturn -1 //no match\n\t\tif (code < NUMBER + 10)\n\t\t\treturn code - NUMBER + 26 + 26\n\t\tif (code < UPPER + 26)\n\t\t\treturn code - UPPER\n\t\tif (code < LOWER + 26)\n\t\t\treturn code - LOWER + 26\n\t}\n\n\tfunction b64ToByteArray (b64) {\n\t\tvar i, j, l, tmp, placeHolders, arr\n\n\t\tif (b64.length % 4 > 0) {\n\t\t\tthrow new Error('Invalid string. Length must be a multiple of 4')\n\t\t}\n\n\t\t// the number of equal signs (place holders)\n\t\t// if there are two placeholders, than the two characters before it\n\t\t// represent one byte\n\t\t// if there is only one, then the three characters before it represent 2 bytes\n\t\t// this is just a cheap hack to not do indexOf twice\n\t\tvar len = b64.length\n\t\tplaceHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0\n\n\t\t// base64 is 4/3 + up to two characters of the original data\n\t\tarr = new Arr(b64.length * 3 / 4 - placeHolders)\n\n\t\t// if there are placeholders, only get up to the last complete 4 chars\n\t\tl = placeHolders > 0 ? b64.length - 4 : b64.length\n\n\t\tvar L = 0\n\n\t\tfunction push (v) {\n\t\t\tarr[L++] = v\n\t\t}\n\n\t\tfor (i = 0, j = 0; i < l; i += 4, j += 3) {\n\t\t\ttmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))\n\t\t\tpush((tmp & 0xFF0000) >> 16)\n\t\t\tpush((tmp & 0xFF00) >> 8)\n\t\t\tpush(tmp & 0xFF)\n\t\t}\n\n\t\tif (placeHolders === 2) {\n\t\t\ttmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)\n\t\t\tpush(tmp & 0xFF)\n\t\t} else if (placeHolders === 1) {\n\t\t\ttmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)\n\t\t\tpush((tmp >> 8) & 0xFF)\n\t\t\tpush(tmp & 0xFF)\n\t\t}\n\n\t\treturn arr\n\t}\n\n\tfunction uint8ToBase64 (uint8) {\n\t\tvar i,\n\t\t\textraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes\n\t\t\toutput = \"\",\n\t\t\ttemp, length\n\n\t\tfunction encode (num) {\n\t\t\treturn lookup.charAt(num)\n\t\t}\n\n\t\tfunction tripletToBase64 (num) {\n\t\t\treturn encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)\n\t\t}\n\n\t\t// go through the array every three bytes, we'll deal with trailing stuff later\n\t\tfor (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {\n\t\t\ttemp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])\n\t\t\toutput += tripletToBase64(temp)\n\t\t}\n\n\t\t// pad the end with zeros, but make sure to not forget the extra bytes\n\t\tswitch (extraBytes) {\n\t\t\tcase 1:\n\t\t\t\ttemp = uint8[uint8.length - 1]\n\t\t\t\toutput += encode(temp >> 2)\n\t\t\t\toutput += encode((temp << 4) & 0x3F)\n\t\t\t\toutput += '=='\n\t\t\t\tbreak\n\t\t\tcase 2:\n\t\t\t\ttemp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])\n\t\t\t\toutput += encode(temp >> 10)\n\t\t\t\toutput += encode((temp >> 4) & 0x3F)\n\t\t\t\toutput += encode((temp << 2) & 0x3F)\n\t\t\t\toutput += '='\n\t\t\t\tbreak\n\t\t}\n\n\t\treturn output\n\t}\n\n\texports.toByteArray = b64ToByteArray\n\texports.fromByteArray = uint8ToBase64\n}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))\n",
-    "\n\n//@ sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoib3V0LmpzLm1hcCIsInNvdXJjZXMiOlsiL2hvbWUvcm9tYW4vUHJvamVjdHMvUmViaWxseS9qc29uLXNjaGVtYS1yZWYtcGFyc2VyL25vZGVfbW9kdWxlcy9icm93c2VyLXJlc29sdmUvZW1wdHkuanMiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiIsInNvdXJjZXNDb250ZW50IjpbIiJdfQ==",
-    "\n\n//@ sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoib3V0LmpzLm1hcCIsInNvdXJjZXMiOlsiL2hvbWUvcm9tYW4vUHJvamVjdHMvUmViaWxseS9qc29uLXNjaGVtYS1yZWYtcGFyc2VyL25vZGVfbW9kdWxlcy9icm93c2VyaWZ5L2xpYi9fZW1wdHkuanMiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IiIsInNvdXJjZXNDb250ZW50IjpbIiJdfQ==",
-    "/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('is-array')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\nBuffer.poolSize = 8192 // not used by this implementation\n\nvar rootParent = {}\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property\n *     on objects.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\nfunction typedArraySupport () {\n  function Bar () {}\n  try {\n    var arr = new Uint8Array(1)\n    arr.foo = function () { return 42 }\n    arr.constructor = Bar\n    return arr.foo() === 42 && // typed array instances can be augmented\n        arr.constructor === Bar && // constructor can be set\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\n/**\n * Class: Buffer\n * =============\n *\n * The Buffer constructor returns instances of `Uint8Array` that are augmented\n * with function properties for all the node `Buffer` API functions. We use\n * `Uint8Array` so that square bracket notation works as expected -- it returns\n * a single octet.\n *\n * By augmenting the instances, we can avoid modifying the `Uint8Array`\n * prototype.\n */\nfunction Buffer (arg) {\n  if (!(this instanceof Buffer)) {\n    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.\n    if (arguments.length > 1) return new Buffer(arg, arguments[1])\n    return new Buffer(arg)\n  }\n\n  this.length = 0\n  this.parent = undefined\n\n  // Common case.\n  if (typeof arg === 'number') {\n    return fromNumber(this, arg)\n  }\n\n  // Slightly less common case.\n  if (typeof arg === 'string') {\n    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')\n  }\n\n  // Unusual.\n  return fromObject(this, arg)\n}\n\nfunction fromNumber (that, length) {\n  that = allocate(that, length < 0 ? 0 : checked(length) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < length; i++) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'\n\n  // Assumption: byteLength() return value is always < kMaxLength.\n  var length = byteLength(string, encoding) | 0\n  that = allocate(that, length)\n\n  that.write(string, encoding)\n  return that\n}\n\nfunction fromObject (that, object) {\n  if (Buffer.isBuffer(object)) return fromBuffer(that, object)\n\n  if (isArray(object)) return fromArray(that, object)\n\n  if (object == null) {\n    throw new TypeError('must start with number, buffer, array or string')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined') {\n    if (object.buffer instanceof ArrayBuffer) {\n      return fromTypedArray(that, object)\n    }\n    if (object instanceof ArrayBuffer) {\n      return fromArrayBuffer(that, object)\n    }\n  }\n\n  if (object.length) return fromArrayLike(that, object)\n\n  return fromJsonObject(that, object)\n}\n\nfunction fromBuffer (that, buffer) {\n  var length = checked(buffer.length) | 0\n  that = allocate(that, length)\n  buffer.copy(that, 0, 0, length)\n  return that\n}\n\nfunction fromArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Duplicate of fromArray() to keep fromArray() monomorphic.\nfunction fromTypedArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  // Truncating the elements is probably not what people expect from typed\n  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior\n  // of the old Buffer constructor.\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    array.byteLength\n    that = Buffer._augment(new Uint8Array(array))\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromTypedArray(that, new Uint8Array(array))\n  }\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.\n// Returns a zero-length buffer for inputs that don't conform to the spec.\nfunction fromJsonObject (that, object) {\n  var array\n  var length = 0\n\n  if (object.type === 'Buffer' && isArray(object.data)) {\n    array = object.data\n    length = checked(array.length) | 0\n  }\n  that = allocate(that, length)\n\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n}\n\nfunction allocate (that, length) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = Buffer._augment(new Uint8Array(length))\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that.length = length\n    that._isBuffer = true\n  }\n\n  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1\n  if (fromPool) that.parent = rootParent\n\n  return that\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (subject, encoding) {\n  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)\n\n  var buf = new Buffer(subject, encoding)\n  delete buf.parent\n  return buf\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  var i = 0\n  var len = Math.min(x, y)\n  while (i < len) {\n    if (a[i] !== b[i]) break\n\n    ++i\n  }\n\n  if (i !== len) {\n    x = a[i]\n    y = b[i]\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'binary':\n    case 'base64':\n    case 'raw':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')\n\n  if (list.length === 0) {\n    return new Buffer(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; i++) {\n      length += list[i].length\n    }\n  }\n\n  var buf = new Buffer(length)\n  var pos = 0\n  for (i = 0; i < list.length; i++) {\n    var item = list[i]\n    item.copy(buf, pos)\n    pos += item.length\n  }\n  return buf\n}\n\nfunction byteLength (string, encoding) {\n  if (typeof string !== 'string') string = '' + string\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'binary':\n      // Deprecated\n      case 'raw':\n      case 'raws':\n        return len\n      case 'utf8':\n      case 'utf-8':\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\n// pre-set for values that may exist in the future\nBuffer.prototype.length = undefined\nBuffer.prototype.parent = undefined\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  start = start | 0\n  end = end === undefined || end === Infinity ? this.length : end | 0\n\n  if (!encoding) encoding = 'utf8'\n  if (start < 0) start = 0\n  if (end > this.length) end = this.length\n  if (end <= start) return ''\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'binary':\n        return binarySlice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return 0\n  return Buffer.compare(this, b)\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset) {\n  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff\n  else if (byteOffset < -0x80000000) byteOffset = -0x80000000\n  byteOffset >>= 0\n\n  if (this.length === 0) return -1\n  if (byteOffset >= this.length) return -1\n\n  // Negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)\n\n  if (typeof val === 'string') {\n    if (val.length === 0) return -1 // special case: looking for empty string always fails\n    return String.prototype.indexOf.call(this, val, byteOffset)\n  }\n  if (Buffer.isBuffer(val)) {\n    return arrayIndexOf(this, val, byteOffset)\n  }\n  if (typeof val === 'number') {\n    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {\n      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)\n    }\n    return arrayIndexOf(this, [ val ], byteOffset)\n  }\n\n  function arrayIndexOf (arr, val, byteOffset) {\n    var foundIndex = -1\n    for (var i = 0; byteOffset + i < arr.length; i++) {\n      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex\n      } else {\n        foundIndex = -1\n      }\n    }\n    return -1\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\n// `get` is deprecated\nBuffer.prototype.get = function get (offset) {\n  console.log('.get() is deprecated. Access using array indexes instead.')\n  return this.readUInt8(offset)\n}\n\n// `set` is deprecated\nBuffer.prototype.set = function set (v, offset) {\n  console.log('.set() is deprecated. Access using array indexes instead.')\n  return this.writeUInt8(v, offset)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new Error('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; i++) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) throw new Error('Invalid hex string')\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction binaryWrite (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    var swap = encoding\n    encoding = offset\n    offset = length | 0\n    length = swap\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'binary':\n        return binaryWrite(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction binarySlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; i++) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = Buffer._augment(this.subarray(start, end))\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; i++) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  if (newBuf.length) newBuf.parent = this.parent || this\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n  if (offset < 0) throw new RangeError('index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; i--) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; i++) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    target._set(this.subarray(start, start + len), targetStart)\n  }\n\n  return len\n}\n\n// fill(value, start=0, end=buffer.length)\nBuffer.prototype.fill = function fill (value, start, end) {\n  if (!value) value = 0\n  if (!start) start = 0\n  if (!end) end = this.length\n\n  if (end < start) throw new RangeError('end < start')\n\n  // Fill 0 bytes; we're done\n  if (end === start) return\n  if (this.length === 0) return\n\n  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')\n  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')\n\n  var i\n  if (typeof value === 'number') {\n    for (i = start; i < end; i++) {\n      this[i] = value\n    }\n  } else {\n    var bytes = utf8ToBytes(value.toString())\n    var len = bytes.length\n    for (i = start; i < end; i++) {\n      this[i] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n/**\n * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.\n * Added in Node 0.12. Only available in browsers that support ArrayBuffer.\n */\nBuffer.prototype.toArrayBuffer = function toArrayBuffer () {\n  if (typeof Uint8Array !== 'undefined') {\n    if (Buffer.TYPED_ARRAY_SUPPORT) {\n      return (new Buffer(this)).buffer\n    } else {\n      var buf = new Uint8Array(this.length)\n      for (var i = 0, len = buf.length; i < len; i += 1) {\n        buf[i] = this[i]\n      }\n      return buf.buffer\n    }\n  } else {\n    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')\n  }\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar BP = Buffer.prototype\n\n/**\n * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods\n */\nBuffer._augment = function _augment (arr) {\n  arr.constructor = Buffer\n  arr._isBuffer = true\n\n  // save reference to original Uint8Array set method before overwriting\n  arr._set = arr.set\n\n  // deprecated\n  arr.get = BP.get\n  arr.set = BP.set\n\n  arr.write = BP.write\n  arr.toString = BP.toString\n  arr.toLocaleString = BP.toString\n  arr.toJSON = BP.toJSON\n  arr.equals = BP.equals\n  arr.compare = BP.compare\n  arr.indexOf = BP.indexOf\n  arr.copy = BP.copy\n  arr.slice = BP.slice\n  arr.readUIntLE = BP.readUIntLE\n  arr.readUIntBE = BP.readUIntBE\n  arr.readUInt8 = BP.readUInt8\n  arr.readUInt16LE = BP.readUInt16LE\n  arr.readUInt16BE = BP.readUInt16BE\n  arr.readUInt32LE = BP.readUInt32LE\n  arr.readUInt32BE = BP.readUInt32BE\n  arr.readIntLE = BP.readIntLE\n  arr.readIntBE = BP.readIntBE\n  arr.readInt8 = BP.readInt8\n  arr.readInt16LE = BP.readInt16LE\n  arr.readInt16BE = BP.readInt16BE\n  arr.readInt32LE = BP.readInt32LE\n  arr.readInt32BE = BP.readInt32BE\n  arr.readFloatLE = BP.readFloatLE\n  arr.readFloatBE = BP.readFloatBE\n  arr.readDoubleLE = BP.readDoubleLE\n  arr.readDoubleBE = BP.readDoubleBE\n  arr.writeUInt8 = BP.writeUInt8\n  arr.writeUIntLE = BP.writeUIntLE\n  arr.writeUIntBE = BP.writeUIntBE\n  arr.writeUInt16LE = BP.writeUInt16LE\n  arr.writeUInt16BE = BP.writeUInt16BE\n  arr.writeUInt32LE = BP.writeUInt32LE\n  arr.writeUInt32BE = BP.writeUInt32BE\n  arr.writeIntLE = BP.writeIntLE\n  arr.writeIntBE = BP.writeIntBE\n  arr.writeInt8 = BP.writeInt8\n  arr.writeInt16LE = BP.writeInt16LE\n  arr.writeInt16BE = BP.writeInt16BE\n  arr.writeInt32LE = BP.writeInt32LE\n  arr.writeInt32BE = BP.writeInt32BE\n  arr.writeFloatLE = BP.writeFloatLE\n  arr.writeFloatBE = BP.writeFloatBE\n  arr.writeDoubleLE = BP.writeDoubleLE\n  arr.writeDoubleBE = BP.writeDoubleBE\n  arr.fill = BP.fill\n  arr.inspect = BP.inspect\n  arr.toArrayBuffer = BP.toArrayBuffer\n\n  return arr\n}\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; i++) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00 | 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; i++) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n",
+    "\n\n//@ sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi9Vc2Vycy9KYW1lcy9Db2RlL29wZW4tc291cmNlL2pzb24tc2NoZW1hLXJlZi1wYXJzZXIvbm9kZV9tb2R1bGVzL2Jyb3dzZXItcmVzb2x2ZS9lbXB0eS5qcyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiIiwiZmlsZSI6Im91dC5qcy5tYXAiLCJzb3VyY2VzQ29udGVudCI6WyIiXX0=",
+    "\n\n//@ sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbIi9Vc2Vycy9KYW1lcy9Db2RlL29wZW4tc291cmNlL2pzb24tc2NoZW1hLXJlZi1wYXJzZXIvbm9kZV9tb2R1bGVzL2Jyb3dzZXJpZnkvbGliL19lbXB0eS5qcyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiIiwiZmlsZSI6Im91dC5qcy5tYXAiLCJzb3VyY2VzQ29udGVudCI6WyIiXX0=",
+    "/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\nBuffer.poolSize = 8192 // not used by this implementation\n\nvar rootParent = {}\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property\n *     on objects.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\nfunction typedArraySupport () {\n  function Bar () {}\n  try {\n    var arr = new Uint8Array(1)\n    arr.foo = function () { return 42 }\n    arr.constructor = Bar\n    return arr.foo() === 42 && // typed array instances can be augmented\n        arr.constructor === Bar && // constructor can be set\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\n/**\n * Class: Buffer\n * =============\n *\n * The Buffer constructor returns instances of `Uint8Array` that are augmented\n * with function properties for all the node `Buffer` API functions. We use\n * `Uint8Array` so that square bracket notation works as expected -- it returns\n * a single octet.\n *\n * By augmenting the instances, we can avoid modifying the `Uint8Array`\n * prototype.\n */\nfunction Buffer (arg) {\n  if (!(this instanceof Buffer)) {\n    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.\n    if (arguments.length > 1) return new Buffer(arg, arguments[1])\n    return new Buffer(arg)\n  }\n\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    this.length = 0\n    this.parent = undefined\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    return fromNumber(this, arg)\n  }\n\n  // Slightly less common case.\n  if (typeof arg === 'string') {\n    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')\n  }\n\n  // Unusual.\n  return fromObject(this, arg)\n}\n\nfunction fromNumber (that, length) {\n  that = allocate(that, length < 0 ? 0 : checked(length) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < length; i++) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'\n\n  // Assumption: byteLength() return value is always < kMaxLength.\n  var length = byteLength(string, encoding) | 0\n  that = allocate(that, length)\n\n  that.write(string, encoding)\n  return that\n}\n\nfunction fromObject (that, object) {\n  if (Buffer.isBuffer(object)) return fromBuffer(that, object)\n\n  if (isArray(object)) return fromArray(that, object)\n\n  if (object == null) {\n    throw new TypeError('must start with number, buffer, array or string')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined') {\n    if (object.buffer instanceof ArrayBuffer) {\n      return fromTypedArray(that, object)\n    }\n    if (object instanceof ArrayBuffer) {\n      return fromArrayBuffer(that, object)\n    }\n  }\n\n  if (object.length) return fromArrayLike(that, object)\n\n  return fromJsonObject(that, object)\n}\n\nfunction fromBuffer (that, buffer) {\n  var length = checked(buffer.length) | 0\n  that = allocate(that, length)\n  buffer.copy(that, 0, 0, length)\n  return that\n}\n\nfunction fromArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Duplicate of fromArray() to keep fromArray() monomorphic.\nfunction fromTypedArray (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  // Truncating the elements is probably not what people expect from typed\n  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior\n  // of the old Buffer constructor.\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    array.byteLength\n    that = Buffer._augment(new Uint8Array(array))\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromTypedArray(that, new Uint8Array(array))\n  }\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = checked(array.length) | 0\n  that = allocate(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\n// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.\n// Returns a zero-length buffer for inputs that don't conform to the spec.\nfunction fromJsonObject (that, object) {\n  var array\n  var length = 0\n\n  if (object.type === 'Buffer' && isArray(object.data)) {\n    array = object.data\n    length = checked(array.length) | 0\n  }\n  that = allocate(that, length)\n\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n} else {\n  // pre-set for values that may exist in the future\n  Buffer.prototype.length = undefined\n  Buffer.prototype.parent = undefined\n}\n\nfunction allocate (that, length) {\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = Buffer._augment(new Uint8Array(length))\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that.length = length\n    that._isBuffer = true\n  }\n\n  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1\n  if (fromPool) that.parent = rootParent\n\n  return that\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (subject, encoding) {\n  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)\n\n  var buf = new Buffer(subject, encoding)\n  delete buf.parent\n  return buf\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  var i = 0\n  var len = Math.min(x, y)\n  while (i < len) {\n    if (a[i] !== b[i]) break\n\n    ++i\n  }\n\n  if (i !== len) {\n    x = a[i]\n    y = b[i]\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'binary':\n    case 'base64':\n    case 'raw':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')\n\n  if (list.length === 0) {\n    return new Buffer(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; i++) {\n      length += list[i].length\n    }\n  }\n\n  var buf = new Buffer(length)\n  var pos = 0\n  for (i = 0; i < list.length; i++) {\n    var item = list[i]\n    item.copy(buf, pos)\n    pos += item.length\n  }\n  return buf\n}\n\nfunction byteLength (string, encoding) {\n  if (typeof string !== 'string') string = '' + string\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'binary':\n      // Deprecated\n      case 'raw':\n      case 'raws':\n        return len\n      case 'utf8':\n      case 'utf-8':\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  start = start | 0\n  end = end === undefined || end === Infinity ? this.length : end | 0\n\n  if (!encoding) encoding = 'utf8'\n  if (start < 0) start = 0\n  if (end > this.length) end = this.length\n  if (end <= start) return ''\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'binary':\n        return binarySlice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return 0\n  return Buffer.compare(this, b)\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset) {\n  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff\n  else if (byteOffset < -0x80000000) byteOffset = -0x80000000\n  byteOffset >>= 0\n\n  if (this.length === 0) return -1\n  if (byteOffset >= this.length) return -1\n\n  // Negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)\n\n  if (typeof val === 'string') {\n    if (val.length === 0) return -1 // special case: looking for empty string always fails\n    return String.prototype.indexOf.call(this, val, byteOffset)\n  }\n  if (Buffer.isBuffer(val)) {\n    return arrayIndexOf(this, val, byteOffset)\n  }\n  if (typeof val === 'number') {\n    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {\n      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)\n    }\n    return arrayIndexOf(this, [ val ], byteOffset)\n  }\n\n  function arrayIndexOf (arr, val, byteOffset) {\n    var foundIndex = -1\n    for (var i = 0; byteOffset + i < arr.length; i++) {\n      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex\n      } else {\n        foundIndex = -1\n      }\n    }\n    return -1\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\n// `get` is deprecated\nBuffer.prototype.get = function get (offset) {\n  console.log('.get() is deprecated. Access using array indexes instead.')\n  return this.readUInt8(offset)\n}\n\n// `set` is deprecated\nBuffer.prototype.set = function set (v, offset) {\n  console.log('.set() is deprecated. Access using array indexes instead.')\n  return this.writeUInt8(v, offset)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new Error('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; i++) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) throw new Error('Invalid hex string')\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction binaryWrite (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    var swap = encoding\n    encoding = offset\n    offset = length | 0\n    length = swap\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'binary':\n        return binaryWrite(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction binarySlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; i++) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; i++) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = Buffer._augment(this.subarray(start, end))\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; i++) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  if (newBuf.length) newBuf.parent = this.parent || this\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = value < 0 ? 1 : 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (value > max || value < min) throw new RangeError('value is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('index out of range')\n  if (offset < 0) throw new RangeError('index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; i--) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; i++) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    target._set(this.subarray(start, start + len), targetStart)\n  }\n\n  return len\n}\n\n// fill(value, start=0, end=buffer.length)\nBuffer.prototype.fill = function fill (value, start, end) {\n  if (!value) value = 0\n  if (!start) start = 0\n  if (!end) end = this.length\n\n  if (end < start) throw new RangeError('end < start')\n\n  // Fill 0 bytes; we're done\n  if (end === start) return\n  if (this.length === 0) return\n\n  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')\n  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')\n\n  var i\n  if (typeof value === 'number') {\n    for (i = start; i < end; i++) {\n      this[i] = value\n    }\n  } else {\n    var bytes = utf8ToBytes(value.toString())\n    var len = bytes.length\n    for (i = start; i < end; i++) {\n      this[i] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n/**\n * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.\n * Added in Node 0.12. Only available in browsers that support ArrayBuffer.\n */\nBuffer.prototype.toArrayBuffer = function toArrayBuffer () {\n  if (typeof Uint8Array !== 'undefined') {\n    if (Buffer.TYPED_ARRAY_SUPPORT) {\n      return (new Buffer(this)).buffer\n    } else {\n      var buf = new Uint8Array(this.length)\n      for (var i = 0, len = buf.length; i < len; i += 1) {\n        buf[i] = this[i]\n      }\n      return buf.buffer\n    }\n  } else {\n    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')\n  }\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar BP = Buffer.prototype\n\n/**\n * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods\n */\nBuffer._augment = function _augment (arr) {\n  arr.constructor = Buffer\n  arr._isBuffer = true\n\n  // save reference to original Uint8Array set method before overwriting\n  arr._set = arr.set\n\n  // deprecated\n  arr.get = BP.get\n  arr.set = BP.set\n\n  arr.write = BP.write\n  arr.toString = BP.toString\n  arr.toLocaleString = BP.toString\n  arr.toJSON = BP.toJSON\n  arr.equals = BP.equals\n  arr.compare = BP.compare\n  arr.indexOf = BP.indexOf\n  arr.copy = BP.copy\n  arr.slice = BP.slice\n  arr.readUIntLE = BP.readUIntLE\n  arr.readUIntBE = BP.readUIntBE\n  arr.readUInt8 = BP.readUInt8\n  arr.readUInt16LE = BP.readUInt16LE\n  arr.readUInt16BE = BP.readUInt16BE\n  arr.readUInt32LE = BP.readUInt32LE\n  arr.readUInt32BE = BP.readUInt32BE\n  arr.readIntLE = BP.readIntLE\n  arr.readIntBE = BP.readIntBE\n  arr.readInt8 = BP.readInt8\n  arr.readInt16LE = BP.readInt16LE\n  arr.readInt16BE = BP.readInt16BE\n  arr.readInt32LE = BP.readInt32LE\n  arr.readInt32BE = BP.readInt32BE\n  arr.readFloatLE = BP.readFloatLE\n  arr.readFloatBE = BP.readFloatBE\n  arr.readDoubleLE = BP.readDoubleLE\n  arr.readDoubleBE = BP.readDoubleBE\n  arr.writeUInt8 = BP.writeUInt8\n  arr.writeUIntLE = BP.writeUIntLE\n  arr.writeUIntBE = BP.writeUIntBE\n  arr.writeUInt16LE = BP.writeUInt16LE\n  arr.writeUInt16BE = BP.writeUInt16BE\n  arr.writeUInt32LE = BP.writeUInt32LE\n  arr.writeUInt32BE = BP.writeUInt32BE\n  arr.writeIntLE = BP.writeIntLE\n  arr.writeIntBE = BP.writeIntBE\n  arr.writeInt8 = BP.writeInt8\n  arr.writeInt16LE = BP.writeInt16LE\n  arr.writeInt16BE = BP.writeInt16BE\n  arr.writeInt32LE = BP.writeInt32LE\n  arr.writeInt32BE = BP.writeInt32BE\n  arr.writeFloatLE = BP.writeFloatLE\n  arr.writeFloatBE = BP.writeFloatBE\n  arr.writeDoubleLE = BP.writeDoubleLE\n  arr.writeDoubleBE = BP.writeDoubleBE\n  arr.fill = BP.fill\n  arr.inspect = BP.inspect\n  arr.toArrayBuffer = BP.toArrayBuffer\n\n  return arr\n}\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; i++) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; i++) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; i++) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n",
+    "var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n",
     "module.exports = {\n  \"100\": \"Continue\",\n  \"101\": \"Switching Protocols\",\n  \"102\": \"Processing\",\n  \"200\": \"OK\",\n  \"201\": \"Created\",\n  \"202\": \"Accepted\",\n  \"203\": \"Non-Authoritative Information\",\n  \"204\": \"No Content\",\n  \"205\": \"Reset Content\",\n  \"206\": \"Partial Content\",\n  \"207\": \"Multi-Status\",\n  \"300\": \"Multiple Choices\",\n  \"301\": \"Moved Permanently\",\n  \"302\": \"Moved Temporarily\",\n  \"303\": \"See Other\",\n  \"304\": \"Not Modified\",\n  \"305\": \"Use Proxy\",\n  \"307\": \"Temporary Redirect\",\n  \"308\": \"Permanent Redirect\",\n  \"400\": \"Bad Request\",\n  \"401\": \"Unauthorized\",\n  \"402\": \"Payment Required\",\n  \"403\": \"Forbidden\",\n  \"404\": \"Not Found\",\n  \"405\": \"Method Not Allowed\",\n  \"406\": \"Not Acceptable\",\n  \"407\": \"Proxy Authentication Required\",\n  \"408\": \"Request Time-out\",\n  \"409\": \"Conflict\",\n  \"410\": \"Gone\",\n  \"411\": \"Length Required\",\n  \"412\": \"Precondition Failed\",\n  \"413\": \"Request Entity Too Large\",\n  \"414\": \"Request-URI Too Large\",\n  \"415\": \"Unsupported Media Type\",\n  \"416\": \"Requested Range Not Satisfiable\",\n  \"417\": \"Expectation Failed\",\n  \"418\": \"I'm a teapot\",\n  \"422\": \"Unprocessable Entity\",\n  \"423\": \"Locked\",\n  \"424\": \"Failed Dependency\",\n  \"425\": \"Unordered Collection\",\n  \"426\": \"Upgrade Required\",\n  \"428\": \"Precondition Required\",\n  \"429\": \"Too Many Requests\",\n  \"431\": \"Request Header Fields Too Large\",\n  \"500\": \"Internal Server Error\",\n  \"501\": \"Not Implemented\",\n  \"502\": \"Bad Gateway\",\n  \"503\": \"Service Unavailable\",\n  \"504\": \"Gateway Time-out\",\n  \"505\": \"HTTP Version Not Supported\",\n  \"506\": \"Variant Also Negotiates\",\n  \"507\": \"Insufficient Storage\",\n  \"509\": \"Bandwidth Limit Exceeded\",\n  \"510\": \"Not Extended\",\n  \"511\": \"Network Authentication Required\"\n}\n",
     "\"use strict\"\n\nvar next = (global.process && process.nextTick) || global.setImmediate || function (f) {\n  setTimeout(f, 0)\n}\n\nmodule.exports = function maybe (cb, promise) {\n  if (cb) {\n    promise\n      .then(function (result) {\n        next(function () { cb(null, result) })\n      }, function (err) {\n        next(function () { cb(err) })\n      })\n    return undefined\n  }\n  else {\n    return promise\n  }\n}\n",
-    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// NOTE: These type checking functions intentionally don't use `instanceof`\n// because it is fragile and can be easily faked with `Object.create()`.\nfunction isArray(ar) {\n  return Array.isArray(ar);\n}\nexports.isArray = isArray;\n\nfunction isBoolean(arg) {\n  return typeof arg === 'boolean';\n}\nexports.isBoolean = isBoolean;\n\nfunction isNull(arg) {\n  return arg === null;\n}\nexports.isNull = isNull;\n\nfunction isNullOrUndefined(arg) {\n  return arg == null;\n}\nexports.isNullOrUndefined = isNullOrUndefined;\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\nexports.isNumber = isNumber;\n\nfunction isString(arg) {\n  return typeof arg === 'string';\n}\nexports.isString = isString;\n\nfunction isSymbol(arg) {\n  return typeof arg === 'symbol';\n}\nexports.isSymbol = isSymbol;\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\nexports.isUndefined = isUndefined;\n\nfunction isRegExp(re) {\n  return isObject(re) && objectToString(re) === '[object RegExp]';\n}\nexports.isRegExp = isRegExp;\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\nexports.isObject = isObject;\n\nfunction isDate(d) {\n  return isObject(d) && objectToString(d) === '[object Date]';\n}\nexports.isDate = isDate;\n\nfunction isError(e) {\n  return isObject(e) &&\n      (objectToString(e) === '[object Error]' || e instanceof Error);\n}\nexports.isError = isError;\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\nexports.isFunction = isFunction;\n\nfunction isPrimitive(arg) {\n  return arg === null ||\n         typeof arg === 'boolean' ||\n         typeof arg === 'number' ||\n         typeof arg === 'string' ||\n         typeof arg === 'symbol' ||  // ES6 symbol\n         typeof arg === 'undefined';\n}\nexports.isPrimitive = isPrimitive;\n\nfunction isBuffer(arg) {\n  return Buffer.isBuffer(arg);\n}\nexports.isBuffer = isBuffer;\n\nfunction objectToString(o) {\n  return Object.prototype.toString.call(o);\n}",
+    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// NOTE: These type checking functions intentionally don't use `instanceof`\n// because it is fragile and can be easily faked with `Object.create()`.\n\nfunction isArray(arg) {\n  if (Array.isArray) {\n    return Array.isArray(arg);\n  }\n  return objectToString(arg) === '[object Array]';\n}\nexports.isArray = isArray;\n\nfunction isBoolean(arg) {\n  return typeof arg === 'boolean';\n}\nexports.isBoolean = isBoolean;\n\nfunction isNull(arg) {\n  return arg === null;\n}\nexports.isNull = isNull;\n\nfunction isNullOrUndefined(arg) {\n  return arg == null;\n}\nexports.isNullOrUndefined = isNullOrUndefined;\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\nexports.isNumber = isNumber;\n\nfunction isString(arg) {\n  return typeof arg === 'string';\n}\nexports.isString = isString;\n\nfunction isSymbol(arg) {\n  return typeof arg === 'symbol';\n}\nexports.isSymbol = isSymbol;\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\nexports.isUndefined = isUndefined;\n\nfunction isRegExp(re) {\n  return objectToString(re) === '[object RegExp]';\n}\nexports.isRegExp = isRegExp;\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\nexports.isObject = isObject;\n\nfunction isDate(d) {\n  return objectToString(d) === '[object Date]';\n}\nexports.isDate = isDate;\n\nfunction isError(e) {\n  return (objectToString(e) === '[object Error]' || e instanceof Error);\n}\nexports.isError = isError;\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\nexports.isFunction = isFunction;\n\nfunction isPrimitive(arg) {\n  return arg === null ||\n         typeof arg === 'boolean' ||\n         typeof arg === 'number' ||\n         typeof arg === 'string' ||\n         typeof arg === 'symbol' ||  // ES6 symbol\n         typeof arg === 'undefined';\n}\nexports.isPrimitive = isPrimitive;\n\nexports.isBuffer = Buffer.isBuffer;\n\nfunction objectToString(o) {\n  return Object.prototype.toString.call(o);\n}\n",
     "\n/**\n * This is the web browser implementation of `debug()`.\n *\n * Expose `debug()` as the module.\n */\n\nexports = module.exports = require('./debug');\nexports.log = log;\nexports.formatArgs = formatArgs;\nexports.save = save;\nexports.load = load;\nexports.useColors = useColors;\nexports.storage = 'undefined' != typeof chrome\n               && 'undefined' != typeof chrome.storage\n                  ? chrome.storage.local\n                  : localstorage();\n\n/**\n * Colors.\n */\n\nexports.colors = [\n  'lightseagreen',\n  'forestgreen',\n  'goldenrod',\n  'dodgerblue',\n  'darkorchid',\n  'crimson'\n];\n\n/**\n * Currently only WebKit-based Web Inspectors, Firefox >= v31,\n * and the Firebug extension (any Firefox version) are known\n * to support \"%c\" CSS customizations.\n *\n * TODO: add a `localStorage` variable to explicitly enable/disable colors\n */\n\nfunction useColors() {\n  // is webkit? http://stackoverflow.com/a/16459606/376773\n  return ('WebkitAppearance' in document.documentElement.style) ||\n    // is firebug? http://stackoverflow.com/a/398120/376773\n    (window.console && (console.firebug || (console.exception && console.table))) ||\n    // is firefox >= v31?\n    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages\n    (navigator.userAgent.toLowerCase().match(/firefox\\/(\\d+)/) && parseInt(RegExp.$1, 10) >= 31);\n}\n\n/**\n * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.\n */\n\nexports.formatters.j = function(v) {\n  return JSON.stringify(v);\n};\n\n\n/**\n * Colorize log arguments if enabled.\n *\n * @api public\n */\n\nfunction formatArgs() {\n  var args = arguments;\n  var useColors = this.useColors;\n\n  args[0] = (useColors ? '%c' : '')\n    + this.namespace\n    + (useColors ? ' %c' : ' ')\n    + args[0]\n    + (useColors ? '%c ' : ' ')\n    + '+' + exports.humanize(this.diff);\n\n  if (!useColors) return args;\n\n  var c = 'color: ' + this.color;\n  args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));\n\n  // the final \"%c\" is somewhat tricky, because there could be other\n  // arguments passed either before or after the %c, so we need to\n  // figure out the correct index to insert the CSS into\n  var index = 0;\n  var lastC = 0;\n  args[0].replace(/%[a-z%]/g, function(match) {\n    if ('%%' === match) return;\n    index++;\n    if ('%c' === match) {\n      // we only are interested in the *last* %c\n      // (the user may have provided their own)\n      lastC = index;\n    }\n  });\n\n  args.splice(lastC, 0, c);\n  return args;\n}\n\n/**\n * Invokes `console.log()` when available.\n * No-op when `console.log` is not a \"function\".\n *\n * @api public\n */\n\nfunction log() {\n  // this hackery is required for IE8/9, where\n  // the `console.log` function doesn't have 'apply'\n  return 'object' === typeof console\n    && console.log\n    && Function.prototype.apply.call(console.log, console, arguments);\n}\n\n/**\n * Save `namespaces`.\n *\n * @param {String} namespaces\n * @api private\n */\n\nfunction save(namespaces) {\n  try {\n    if (null == namespaces) {\n      exports.storage.removeItem('debug');\n    } else {\n      exports.storage.debug = namespaces;\n    }\n  } catch(e) {}\n}\n\n/**\n * Load `namespaces`.\n *\n * @return {String} returns the previously persisted debug modes\n * @api private\n */\n\nfunction load() {\n  var r;\n  try {\n    r = exports.storage.debug;\n  } catch(e) {}\n  return r;\n}\n\n/**\n * Enable namespaces listed in `localStorage.debug` initially.\n */\n\nexports.enable(load());\n\n/**\n * Localstorage attempts to return the localstorage.\n *\n * This is necessary because safari throws\n * when a user disables cookies/localstorage\n * and you attempt to access it.\n *\n * @return {LocalStorage}\n * @api private\n */\n\nfunction localstorage(){\n  try {\n    return window.localStorage;\n  } catch (e) {}\n}\n",
     "\n/**\n * This is the common logic for both the Node.js and web browser\n * implementations of `debug()`.\n *\n * Expose `debug()` as the module.\n */\n\nexports = module.exports = debug;\nexports.coerce = coerce;\nexports.disable = disable;\nexports.enable = enable;\nexports.enabled = enabled;\nexports.humanize = require('ms');\n\n/**\n * The currently active debug mode names, and names to skip.\n */\n\nexports.names = [];\nexports.skips = [];\n\n/**\n * Map of special \"%n\" handling functions, for the debug \"format\" argument.\n *\n * Valid key names are a single, lowercased letter, i.e. \"n\".\n */\n\nexports.formatters = {};\n\n/**\n * Previously assigned color.\n */\n\nvar prevColor = 0;\n\n/**\n * Previous log timestamp.\n */\n\nvar prevTime;\n\n/**\n * Select a color.\n *\n * @return {Number}\n * @api private\n */\n\nfunction selectColor() {\n  return exports.colors[prevColor++ % exports.colors.length];\n}\n\n/**\n * Create a debugger with the given `namespace`.\n *\n * @param {String} namespace\n * @return {Function}\n * @api public\n */\n\nfunction debug(namespace) {\n\n  // define the `disabled` version\n  function disabled() {\n  }\n  disabled.enabled = false;\n\n  // define the `enabled` version\n  function enabled() {\n\n    var self = enabled;\n\n    // set `diff` timestamp\n    var curr = +new Date();\n    var ms = curr - (prevTime || curr);\n    self.diff = ms;\n    self.prev = prevTime;\n    self.curr = curr;\n    prevTime = curr;\n\n    // add the `color` if not set\n    if (null == self.useColors) self.useColors = exports.useColors();\n    if (null == self.color && self.useColors) self.color = selectColor();\n\n    var args = Array.prototype.slice.call(arguments);\n\n    args[0] = exports.coerce(args[0]);\n\n    if ('string' !== typeof args[0]) {\n      // anything else let's inspect with %o\n      args = ['%o'].concat(args);\n    }\n\n    // apply any `formatters` transformations\n    var index = 0;\n    args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {\n      // if we encounter an escaped % then don't increase the array index\n      if (match === '%%') return match;\n      index++;\n      var formatter = exports.formatters[format];\n      if ('function' === typeof formatter) {\n        var val = args[index];\n        match = formatter.call(self, val);\n\n        // now we need to remove `args[index]` since it's inlined in the `format`\n        args.splice(index, 1);\n        index--;\n      }\n      return match;\n    });\n\n    if ('function' === typeof exports.formatArgs) {\n      args = exports.formatArgs.apply(self, args);\n    }\n    var logFn = enabled.log || exports.log || console.log.bind(console);\n    logFn.apply(self, args);\n  }\n  enabled.enabled = true;\n\n  var fn = exports.enabled(namespace) ? enabled : disabled;\n\n  fn.namespace = namespace;\n\n  return fn;\n}\n\n/**\n * Enables a debug mode by namespaces. This can include modes\n * separated by a colon and wildcards.\n *\n * @param {String} namespaces\n * @api public\n */\n\nfunction enable(namespaces) {\n  exports.save(namespaces);\n\n  var split = (namespaces || '').split(/[\\s,]+/);\n  var len = split.length;\n\n  for (var i = 0; i < len; i++) {\n    if (!split[i]) continue; // ignore empty strings\n    namespaces = split[i].replace(/\\*/g, '.*?');\n    if (namespaces[0] === '-') {\n      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));\n    } else {\n      exports.names.push(new RegExp('^' + namespaces + '$'));\n    }\n  }\n}\n\n/**\n * Disable debug output.\n *\n * @api public\n */\n\nfunction disable() {\n  exports.enable('');\n}\n\n/**\n * Returns true if the given mode name is enabled, false otherwise.\n *\n * @param {String} name\n * @return {Boolean}\n * @api public\n */\n\nfunction enabled(name) {\n  var i, len;\n  for (i = 0, len = exports.skips.length; i < len; i++) {\n    if (exports.skips[i].test(name)) {\n      return false;\n    }\n  }\n  for (i = 0, len = exports.names.length; i < len; i++) {\n    if (exports.names[i].test(name)) {\n      return true;\n    }\n  }\n  return false;\n}\n\n/**\n * Coerce `val`.\n *\n * @param {Mixed} val\n * @return {Mixed}\n * @api private\n */\n\nfunction coerce(val) {\n  if (val instanceof Error) return val.stack || val.message;\n  return val;\n}\n",
     "/*!\n * @overview es6-promise - a tiny implementation of Promises/A+.\n * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)\n * @license   Licensed under MIT license\n *            See https://raw.githubusercontent.com/jakearchibald/es6-promise/master/LICENSE\n * @version   3.0.2\n */\n\n(function() {\n    \"use strict\";\n    function lib$es6$promise$utils$$objectOrFunction(x) {\n      return typeof x === 'function' || (typeof x === 'object' && x !== null);\n    }\n\n    function lib$es6$promise$utils$$isFunction(x) {\n      return typeof x === 'function';\n    }\n\n    function lib$es6$promise$utils$$isMaybeThenable(x) {\n      return typeof x === 'object' && x !== null;\n    }\n\n    var lib$es6$promise$utils$$_isArray;\n    if (!Array.isArray) {\n      lib$es6$promise$utils$$_isArray = function (x) {\n        return Object.prototype.toString.call(x) === '[object Array]';\n      };\n    } else {\n      lib$es6$promise$utils$$_isArray = Array.isArray;\n    }\n\n    var lib$es6$promise$utils$$isArray = lib$es6$promise$utils$$_isArray;\n    var lib$es6$promise$asap$$len = 0;\n    var lib$es6$promise$asap$$toString = {}.toString;\n    var lib$es6$promise$asap$$vertxNext;\n    var lib$es6$promise$asap$$customSchedulerFn;\n\n    var lib$es6$promise$asap$$asap = function asap(callback, arg) {\n      lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len] = callback;\n      lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len + 1] = arg;\n      lib$es6$promise$asap$$len += 2;\n      if (lib$es6$promise$asap$$len === 2) {\n        // If len is 2, that means that we need to schedule an async flush.\n        // If additional callbacks are queued before the queue is flushed, they\n        // will be processed by this flush that we are scheduling.\n        if (lib$es6$promise$asap$$customSchedulerFn) {\n          lib$es6$promise$asap$$customSchedulerFn(lib$es6$promise$asap$$flush);\n        } else {\n          lib$es6$promise$asap$$scheduleFlush();\n        }\n      }\n    }\n\n    function lib$es6$promise$asap$$setScheduler(scheduleFn) {\n      lib$es6$promise$asap$$customSchedulerFn = scheduleFn;\n    }\n\n    function lib$es6$promise$asap$$setAsap(asapFn) {\n      lib$es6$promise$asap$$asap = asapFn;\n    }\n\n    var lib$es6$promise$asap$$browserWindow = (typeof window !== 'undefined') ? window : undefined;\n    var lib$es6$promise$asap$$browserGlobal = lib$es6$promise$asap$$browserWindow || {};\n    var lib$es6$promise$asap$$BrowserMutationObserver = lib$es6$promise$asap$$browserGlobal.MutationObserver || lib$es6$promise$asap$$browserGlobal.WebKitMutationObserver;\n    var lib$es6$promise$asap$$isNode = typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';\n\n    // test for web worker but not in IE10\n    var lib$es6$promise$asap$$isWorker = typeof Uint8ClampedArray !== 'undefined' &&\n      typeof importScripts !== 'undefined' &&\n      typeof MessageChannel !== 'undefined';\n\n    // node\n    function lib$es6$promise$asap$$useNextTick() {\n      // node version 0.10.x displays a deprecation warning when nextTick is used recursively\n      // see https://github.com/cujojs/when/issues/410 for details\n      return function() {\n        process.nextTick(lib$es6$promise$asap$$flush);\n      };\n    }\n\n    // vertx\n    function lib$es6$promise$asap$$useVertxTimer() {\n      return function() {\n        lib$es6$promise$asap$$vertxNext(lib$es6$promise$asap$$flush);\n      };\n    }\n\n    function lib$es6$promise$asap$$useMutationObserver() {\n      var iterations = 0;\n      var observer = new lib$es6$promise$asap$$BrowserMutationObserver(lib$es6$promise$asap$$flush);\n      var node = document.createTextNode('');\n      observer.observe(node, { characterData: true });\n\n      return function() {\n        node.data = (iterations = ++iterations % 2);\n      };\n    }\n\n    // web worker\n    function lib$es6$promise$asap$$useMessageChannel() {\n      var channel = new MessageChannel();\n      channel.port1.onmessage = lib$es6$promise$asap$$flush;\n      return function () {\n        channel.port2.postMessage(0);\n      };\n    }\n\n    function lib$es6$promise$asap$$useSetTimeout() {\n      return function() {\n        setTimeout(lib$es6$promise$asap$$flush, 1);\n      };\n    }\n\n    var lib$es6$promise$asap$$queue = new Array(1000);\n    function lib$es6$promise$asap$$flush() {\n      for (var i = 0; i < lib$es6$promise$asap$$len; i+=2) {\n        var callback = lib$es6$promise$asap$$queue[i];\n        var arg = lib$es6$promise$asap$$queue[i+1];\n\n        callback(arg);\n\n        lib$es6$promise$asap$$queue[i] = undefined;\n        lib$es6$promise$asap$$queue[i+1] = undefined;\n      }\n\n      lib$es6$promise$asap$$len = 0;\n    }\n\n    function lib$es6$promise$asap$$attemptVertx() {\n      try {\n        var r = require;\n        var vertx = r('vertx');\n        lib$es6$promise$asap$$vertxNext = vertx.runOnLoop || vertx.runOnContext;\n        return lib$es6$promise$asap$$useVertxTimer();\n      } catch(e) {\n        return lib$es6$promise$asap$$useSetTimeout();\n      }\n    }\n\n    var lib$es6$promise$asap$$scheduleFlush;\n    // Decide what async method to use to triggering processing of queued callbacks:\n    if (lib$es6$promise$asap$$isNode) {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useNextTick();\n    } else if (lib$es6$promise$asap$$BrowserMutationObserver) {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useMutationObserver();\n    } else if (lib$es6$promise$asap$$isWorker) {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useMessageChannel();\n    } else if (lib$es6$promise$asap$$browserWindow === undefined && typeof require === 'function') {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$attemptVertx();\n    } else {\n      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useSetTimeout();\n    }\n\n    function lib$es6$promise$$internal$$noop() {}\n\n    var lib$es6$promise$$internal$$PENDING   = void 0;\n    var lib$es6$promise$$internal$$FULFILLED = 1;\n    var lib$es6$promise$$internal$$REJECTED  = 2;\n\n    var lib$es6$promise$$internal$$GET_THEN_ERROR = new lib$es6$promise$$internal$$ErrorObject();\n\n    function lib$es6$promise$$internal$$selfFulfillment() {\n      return new TypeError(\"You cannot resolve a promise with itself\");\n    }\n\n    function lib$es6$promise$$internal$$cannotReturnOwn() {\n      return new TypeError('A promises callback cannot return that same promise.');\n    }\n\n    function lib$es6$promise$$internal$$getThen(promise) {\n      try {\n        return promise.then;\n      } catch(error) {\n        lib$es6$promise$$internal$$GET_THEN_ERROR.error = error;\n        return lib$es6$promise$$internal$$GET_THEN_ERROR;\n      }\n    }\n\n    function lib$es6$promise$$internal$$tryThen(then, value, fulfillmentHandler, rejectionHandler) {\n      try {\n        then.call(value, fulfillmentHandler, rejectionHandler);\n      } catch(e) {\n        return e;\n      }\n    }\n\n    function lib$es6$promise$$internal$$handleForeignThenable(promise, thenable, then) {\n       lib$es6$promise$asap$$asap(function(promise) {\n        var sealed = false;\n        var error = lib$es6$promise$$internal$$tryThen(then, thenable, function(value) {\n          if (sealed) { return; }\n          sealed = true;\n          if (thenable !== value) {\n            lib$es6$promise$$internal$$resolve(promise, value);\n          } else {\n            lib$es6$promise$$internal$$fulfill(promise, value);\n          }\n        }, function(reason) {\n          if (sealed) { return; }\n          sealed = true;\n\n          lib$es6$promise$$internal$$reject(promise, reason);\n        }, 'Settle: ' + (promise._label || ' unknown promise'));\n\n        if (!sealed && error) {\n          sealed = true;\n          lib$es6$promise$$internal$$reject(promise, error);\n        }\n      }, promise);\n    }\n\n    function lib$es6$promise$$internal$$handleOwnThenable(promise, thenable) {\n      if (thenable._state === lib$es6$promise$$internal$$FULFILLED) {\n        lib$es6$promise$$internal$$fulfill(promise, thenable._result);\n      } else if (thenable._state === lib$es6$promise$$internal$$REJECTED) {\n        lib$es6$promise$$internal$$reject(promise, thenable._result);\n      } else {\n        lib$es6$promise$$internal$$subscribe(thenable, undefined, function(value) {\n          lib$es6$promise$$internal$$resolve(promise, value);\n        }, function(reason) {\n          lib$es6$promise$$internal$$reject(promise, reason);\n        });\n      }\n    }\n\n    function lib$es6$promise$$internal$$handleMaybeThenable(promise, maybeThenable) {\n      if (maybeThenable.constructor === promise.constructor) {\n        lib$es6$promise$$internal$$handleOwnThenable(promise, maybeThenable);\n      } else {\n        var then = lib$es6$promise$$internal$$getThen(maybeThenable);\n\n        if (then === lib$es6$promise$$internal$$GET_THEN_ERROR) {\n          lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$GET_THEN_ERROR.error);\n        } else if (then === undefined) {\n          lib$es6$promise$$internal$$fulfill(promise, maybeThenable);\n        } else if (lib$es6$promise$utils$$isFunction(then)) {\n          lib$es6$promise$$internal$$handleForeignThenable(promise, maybeThenable, then);\n        } else {\n          lib$es6$promise$$internal$$fulfill(promise, maybeThenable);\n        }\n      }\n    }\n\n    function lib$es6$promise$$internal$$resolve(promise, value) {\n      if (promise === value) {\n        lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$selfFulfillment());\n      } else if (lib$es6$promise$utils$$objectOrFunction(value)) {\n        lib$es6$promise$$internal$$handleMaybeThenable(promise, value);\n      } else {\n        lib$es6$promise$$internal$$fulfill(promise, value);\n      }\n    }\n\n    function lib$es6$promise$$internal$$publishRejection(promise) {\n      if (promise._onerror) {\n        promise._onerror(promise._result);\n      }\n\n      lib$es6$promise$$internal$$publish(promise);\n    }\n\n    function lib$es6$promise$$internal$$fulfill(promise, value) {\n      if (promise._state !== lib$es6$promise$$internal$$PENDING) { return; }\n\n      promise._result = value;\n      promise._state = lib$es6$promise$$internal$$FULFILLED;\n\n      if (promise._subscribers.length !== 0) {\n        lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish, promise);\n      }\n    }\n\n    function lib$es6$promise$$internal$$reject(promise, reason) {\n      if (promise._state !== lib$es6$promise$$internal$$PENDING) { return; }\n      promise._state = lib$es6$promise$$internal$$REJECTED;\n      promise._result = reason;\n\n      lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publishRejection, promise);\n    }\n\n    function lib$es6$promise$$internal$$subscribe(parent, child, onFulfillment, onRejection) {\n      var subscribers = parent._subscribers;\n      var length = subscribers.length;\n\n      parent._onerror = null;\n\n      subscribers[length] = child;\n      subscribers[length + lib$es6$promise$$internal$$FULFILLED] = onFulfillment;\n      subscribers[length + lib$es6$promise$$internal$$REJECTED]  = onRejection;\n\n      if (length === 0 && parent._state) {\n        lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish, parent);\n      }\n    }\n\n    function lib$es6$promise$$internal$$publish(promise) {\n      var subscribers = promise._subscribers;\n      var settled = promise._state;\n\n      if (subscribers.length === 0) { return; }\n\n      var child, callback, detail = promise._result;\n\n      for (var i = 0; i < subscribers.length; i += 3) {\n        child = subscribers[i];\n        callback = subscribers[i + settled];\n\n        if (child) {\n          lib$es6$promise$$internal$$invokeCallback(settled, child, callback, detail);\n        } else {\n          callback(detail);\n        }\n      }\n\n      promise._subscribers.length = 0;\n    }\n\n    function lib$es6$promise$$internal$$ErrorObject() {\n      this.error = null;\n    }\n\n    var lib$es6$promise$$internal$$TRY_CATCH_ERROR = new lib$es6$promise$$internal$$ErrorObject();\n\n    function lib$es6$promise$$internal$$tryCatch(callback, detail) {\n      try {\n        return callback(detail);\n      } catch(e) {\n        lib$es6$promise$$internal$$TRY_CATCH_ERROR.error = e;\n        return lib$es6$promise$$internal$$TRY_CATCH_ERROR;\n      }\n    }\n\n    function lib$es6$promise$$internal$$invokeCallback(settled, promise, callback, detail) {\n      var hasCallback = lib$es6$promise$utils$$isFunction(callback),\n          value, error, succeeded, failed;\n\n      if (hasCallback) {\n        value = lib$es6$promise$$internal$$tryCatch(callback, detail);\n\n        if (value === lib$es6$promise$$internal$$TRY_CATCH_ERROR) {\n          failed = true;\n          error = value.error;\n          value = null;\n        } else {\n          succeeded = true;\n        }\n\n        if (promise === value) {\n          lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$cannotReturnOwn());\n          return;\n        }\n\n      } else {\n        value = detail;\n        succeeded = true;\n      }\n\n      if (promise._state !== lib$es6$promise$$internal$$PENDING) {\n        // noop\n      } else if (hasCallback && succeeded) {\n        lib$es6$promise$$internal$$resolve(promise, value);\n      } else if (failed) {\n        lib$es6$promise$$internal$$reject(promise, error);\n      } else if (settled === lib$es6$promise$$internal$$FULFILLED) {\n        lib$es6$promise$$internal$$fulfill(promise, value);\n      } else if (settled === lib$es6$promise$$internal$$REJECTED) {\n        lib$es6$promise$$internal$$reject(promise, value);\n      }\n    }\n\n    function lib$es6$promise$$internal$$initializePromise(promise, resolver) {\n      try {\n        resolver(function resolvePromise(value){\n          lib$es6$promise$$internal$$resolve(promise, value);\n        }, function rejectPromise(reason) {\n          lib$es6$promise$$internal$$reject(promise, reason);\n        });\n      } catch(e) {\n        lib$es6$promise$$internal$$reject(promise, e);\n      }\n    }\n\n    function lib$es6$promise$enumerator$$Enumerator(Constructor, input) {\n      var enumerator = this;\n\n      enumerator._instanceConstructor = Constructor;\n      enumerator.promise = new Constructor(lib$es6$promise$$internal$$noop);\n\n      if (enumerator._validateInput(input)) {\n        enumerator._input     = input;\n        enumerator.length     = input.length;\n        enumerator._remaining = input.length;\n\n        enumerator._init();\n\n        if (enumerator.length === 0) {\n          lib$es6$promise$$internal$$fulfill(enumerator.promise, enumerator._result);\n        } else {\n          enumerator.length = enumerator.length || 0;\n          enumerator._enumerate();\n          if (enumerator._remaining === 0) {\n            lib$es6$promise$$internal$$fulfill(enumerator.promise, enumerator._result);\n          }\n        }\n      } else {\n        lib$es6$promise$$internal$$reject(enumerator.promise, enumerator._validationError());\n      }\n    }\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._validateInput = function(input) {\n      return lib$es6$promise$utils$$isArray(input);\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._validationError = function() {\n      return new Error('Array Methods must be provided an Array');\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._init = function() {\n      this._result = new Array(this.length);\n    };\n\n    var lib$es6$promise$enumerator$$default = lib$es6$promise$enumerator$$Enumerator;\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._enumerate = function() {\n      var enumerator = this;\n\n      var length  = enumerator.length;\n      var promise = enumerator.promise;\n      var input   = enumerator._input;\n\n      for (var i = 0; promise._state === lib$es6$promise$$internal$$PENDING && i < length; i++) {\n        enumerator._eachEntry(input[i], i);\n      }\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._eachEntry = function(entry, i) {\n      var enumerator = this;\n      var c = enumerator._instanceConstructor;\n\n      if (lib$es6$promise$utils$$isMaybeThenable(entry)) {\n        if (entry.constructor === c && entry._state !== lib$es6$promise$$internal$$PENDING) {\n          entry._onerror = null;\n          enumerator._settledAt(entry._state, i, entry._result);\n        } else {\n          enumerator._willSettleAt(c.resolve(entry), i);\n        }\n      } else {\n        enumerator._remaining--;\n        enumerator._result[i] = entry;\n      }\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._settledAt = function(state, i, value) {\n      var enumerator = this;\n      var promise = enumerator.promise;\n\n      if (promise._state === lib$es6$promise$$internal$$PENDING) {\n        enumerator._remaining--;\n\n        if (state === lib$es6$promise$$internal$$REJECTED) {\n          lib$es6$promise$$internal$$reject(promise, value);\n        } else {\n          enumerator._result[i] = value;\n        }\n      }\n\n      if (enumerator._remaining === 0) {\n        lib$es6$promise$$internal$$fulfill(promise, enumerator._result);\n      }\n    };\n\n    lib$es6$promise$enumerator$$Enumerator.prototype._willSettleAt = function(promise, i) {\n      var enumerator = this;\n\n      lib$es6$promise$$internal$$subscribe(promise, undefined, function(value) {\n        enumerator._settledAt(lib$es6$promise$$internal$$FULFILLED, i, value);\n      }, function(reason) {\n        enumerator._settledAt(lib$es6$promise$$internal$$REJECTED, i, reason);\n      });\n    };\n    function lib$es6$promise$promise$all$$all(entries) {\n      return new lib$es6$promise$enumerator$$default(this, entries).promise;\n    }\n    var lib$es6$promise$promise$all$$default = lib$es6$promise$promise$all$$all;\n    function lib$es6$promise$promise$race$$race(entries) {\n      /*jshint validthis:true */\n      var Constructor = this;\n\n      var promise = new Constructor(lib$es6$promise$$internal$$noop);\n\n      if (!lib$es6$promise$utils$$isArray(entries)) {\n        lib$es6$promise$$internal$$reject(promise, new TypeError('You must pass an array to race.'));\n        return promise;\n      }\n\n      var length = entries.length;\n\n      function onFulfillment(value) {\n        lib$es6$promise$$internal$$resolve(promise, value);\n      }\n\n      function onRejection(reason) {\n        lib$es6$promise$$internal$$reject(promise, reason);\n      }\n\n      for (var i = 0; promise._state === lib$es6$promise$$internal$$PENDING && i < length; i++) {\n        lib$es6$promise$$internal$$subscribe(Constructor.resolve(entries[i]), undefined, onFulfillment, onRejection);\n      }\n\n      return promise;\n    }\n    var lib$es6$promise$promise$race$$default = lib$es6$promise$promise$race$$race;\n    function lib$es6$promise$promise$resolve$$resolve(object) {\n      /*jshint validthis:true */\n      var Constructor = this;\n\n      if (object && typeof object === 'object' && object.constructor === Constructor) {\n        return object;\n      }\n\n      var promise = new Constructor(lib$es6$promise$$internal$$noop);\n      lib$es6$promise$$internal$$resolve(promise, object);\n      return promise;\n    }\n    var lib$es6$promise$promise$resolve$$default = lib$es6$promise$promise$resolve$$resolve;\n    function lib$es6$promise$promise$reject$$reject(reason) {\n      /*jshint validthis:true */\n      var Constructor = this;\n      var promise = new Constructor(lib$es6$promise$$internal$$noop);\n      lib$es6$promise$$internal$$reject(promise, reason);\n      return promise;\n    }\n    var lib$es6$promise$promise$reject$$default = lib$es6$promise$promise$reject$$reject;\n\n    var lib$es6$promise$promise$$counter = 0;\n\n    function lib$es6$promise$promise$$needsResolver() {\n      throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');\n    }\n\n    function lib$es6$promise$promise$$needsNew() {\n      throw new TypeError(\"Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.\");\n    }\n\n    var lib$es6$promise$promise$$default = lib$es6$promise$promise$$Promise;\n    /**\n      Promise objects represent the eventual result of an asynchronous operation. The\n      primary way of interacting with a promise is through its `then` method, which\n      registers callbacks to receive either a promise's eventual value or the reason\n      why the promise cannot be fulfilled.\n\n      Terminology\n      -----------\n\n      - `promise` is an object or function with a `then` method whose behavior conforms to this specification.\n      - `thenable` is an object or function that defines a `then` method.\n      - `value` is any legal JavaScript value (including undefined, a thenable, or a promise).\n      - `exception` is a value that is thrown using the throw statement.\n      - `reason` is a value that indicates why a promise was rejected.\n      - `settled` the final resting state of a promise, fulfilled or rejected.\n\n      A promise can be in one of three states: pending, fulfilled, or rejected.\n\n      Promises that are fulfilled have a fulfillment value and are in the fulfilled\n      state.  Promises that are rejected have a rejection reason and are in the\n      rejected state.  A fulfillment value is never a thenable.\n\n      Promises can also be said to *resolve* a value.  If this value is also a\n      promise, then the original promise's settled state will match the value's\n      settled state.  So a promise that *resolves* a promise that rejects will\n      itself reject, and a promise that *resolves* a promise that fulfills will\n      itself fulfill.\n\n\n      Basic Usage:\n      ------------\n\n      ```js\n      var promise = new Promise(function(resolve, reject) {\n        // on success\n        resolve(value);\n\n        // on failure\n        reject(reason);\n      });\n\n      promise.then(function(value) {\n        // on fulfillment\n      }, function(reason) {\n        // on rejection\n      });\n      ```\n\n      Advanced Usage:\n      ---------------\n\n      Promises shine when abstracting away asynchronous interactions such as\n      `XMLHttpRequest`s.\n\n      ```js\n      function getJSON(url) {\n        return new Promise(function(resolve, reject){\n          var xhr = new XMLHttpRequest();\n\n          xhr.open('GET', url);\n          xhr.onreadystatechange = handler;\n          xhr.responseType = 'json';\n          xhr.setRequestHeader('Accept', 'application/json');\n          xhr.send();\n\n          function handler() {\n            if (this.readyState === this.DONE) {\n              if (this.status === 200) {\n                resolve(this.response);\n              } else {\n                reject(new Error('getJSON: `' + url + '` failed with status: [' + this.status + ']'));\n              }\n            }\n          };\n        });\n      }\n\n      getJSON('/posts.json').then(function(json) {\n        // on fulfillment\n      }, function(reason) {\n        // on rejection\n      });\n      ```\n\n      Unlike callbacks, promises are great composable primitives.\n\n      ```js\n      Promise.all([\n        getJSON('/posts'),\n        getJSON('/comments')\n      ]).then(function(values){\n        values[0] // => postsJSON\n        values[1] // => commentsJSON\n\n        return values;\n      });\n      ```\n\n      @class Promise\n      @param {function} resolver\n      Useful for tooling.\n      @constructor\n    */\n    function lib$es6$promise$promise$$Promise(resolver) {\n      this._id = lib$es6$promise$promise$$counter++;\n      this._state = undefined;\n      this._result = undefined;\n      this._subscribers = [];\n\n      if (lib$es6$promise$$internal$$noop !== resolver) {\n        if (!lib$es6$promise$utils$$isFunction(resolver)) {\n          lib$es6$promise$promise$$needsResolver();\n        }\n\n        if (!(this instanceof lib$es6$promise$promise$$Promise)) {\n          lib$es6$promise$promise$$needsNew();\n        }\n\n        lib$es6$promise$$internal$$initializePromise(this, resolver);\n      }\n    }\n\n    lib$es6$promise$promise$$Promise.all = lib$es6$promise$promise$all$$default;\n    lib$es6$promise$promise$$Promise.race = lib$es6$promise$promise$race$$default;\n    lib$es6$promise$promise$$Promise.resolve = lib$es6$promise$promise$resolve$$default;\n    lib$es6$promise$promise$$Promise.reject = lib$es6$promise$promise$reject$$default;\n    lib$es6$promise$promise$$Promise._setScheduler = lib$es6$promise$asap$$setScheduler;\n    lib$es6$promise$promise$$Promise._setAsap = lib$es6$promise$asap$$setAsap;\n    lib$es6$promise$promise$$Promise._asap = lib$es6$promise$asap$$asap;\n\n    lib$es6$promise$promise$$Promise.prototype = {\n      constructor: lib$es6$promise$promise$$Promise,\n\n    /**\n      The primary way of interacting with a promise is through its `then` method,\n      which registers callbacks to receive either a promise's eventual value or the\n      reason why the promise cannot be fulfilled.\n\n      ```js\n      findUser().then(function(user){\n        // user is available\n      }, function(reason){\n        // user is unavailable, and you are given the reason why\n      });\n      ```\n\n      Chaining\n      --------\n\n      The return value of `then` is itself a promise.  This second, 'downstream'\n      promise is resolved with the return value of the first promise's fulfillment\n      or rejection handler, or rejected if the handler throws an exception.\n\n      ```js\n      findUser().then(function (user) {\n        return user.name;\n      }, function (reason) {\n        return 'default name';\n      }).then(function (userName) {\n        // If `findUser` fulfilled, `userName` will be the user's name, otherwise it\n        // will be `'default name'`\n      });\n\n      findUser().then(function (user) {\n        throw new Error('Found user, but still unhappy');\n      }, function (reason) {\n        throw new Error('`findUser` rejected and we're unhappy');\n      }).then(function (value) {\n        // never reached\n      }, function (reason) {\n        // if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.\n        // If `findUser` rejected, `reason` will be '`findUser` rejected and we're unhappy'.\n      });\n      ```\n      If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.\n\n      ```js\n      findUser().then(function (user) {\n        throw new PedagogicalException('Upstream error');\n      }).then(function (value) {\n        // never reached\n      }).then(function (value) {\n        // never reached\n      }, function (reason) {\n        // The `PedgagocialException` is propagated all the way down to here\n      });\n      ```\n\n      Assimilation\n      ------------\n\n      Sometimes the value you want to propagate to a downstream promise can only be\n      retrieved asynchronously. This can be achieved by returning a promise in the\n      fulfillment or rejection handler. The downstream promise will then be pending\n      until the returned promise is settled. This is called *assimilation*.\n\n      ```js\n      findUser().then(function (user) {\n        return findCommentsByAuthor(user);\n      }).then(function (comments) {\n        // The user's comments are now available\n      });\n      ```\n\n      If the assimliated promise rejects, then the downstream promise will also reject.\n\n      ```js\n      findUser().then(function (user) {\n        return findCommentsByAuthor(user);\n      }).then(function (comments) {\n        // If `findCommentsByAuthor` fulfills, we'll have the value here\n      }, function (reason) {\n        // If `findCommentsByAuthor` rejects, we'll have the reason here\n      });\n      ```\n\n      Simple Example\n      --------------\n\n      Synchronous Example\n\n      ```javascript\n      var result;\n\n      try {\n        result = findResult();\n        // success\n      } catch(reason) {\n        // failure\n      }\n      ```\n\n      Errback Example\n\n      ```js\n      findResult(function(result, err){\n        if (err) {\n          // failure\n        } else {\n          // success\n        }\n      });\n      ```\n\n      Promise Example;\n\n      ```javascript\n      findResult().then(function(result){\n        // success\n      }, function(reason){\n        // failure\n      });\n      ```\n\n      Advanced Example\n      --------------\n\n      Synchronous Example\n\n      ```javascript\n      var author, books;\n\n      try {\n        author = findAuthor();\n        books  = findBooksByAuthor(author);\n        // success\n      } catch(reason) {\n        // failure\n      }\n      ```\n\n      Errback Example\n\n      ```js\n\n      function foundBooks(books) {\n\n      }\n\n      function failure(reason) {\n\n      }\n\n      findAuthor(function(author, err){\n        if (err) {\n          failure(err);\n          // failure\n        } else {\n          try {\n            findBoooksByAuthor(author, function(books, err) {\n              if (err) {\n                failure(err);\n              } else {\n                try {\n                  foundBooks(books);\n                } catch(reason) {\n                  failure(reason);\n                }\n              }\n            });\n          } catch(error) {\n            failure(err);\n          }\n          // success\n        }\n      });\n      ```\n\n      Promise Example;\n\n      ```javascript\n      findAuthor().\n        then(findBooksByAuthor).\n        then(function(books){\n          // found books\n      }).catch(function(reason){\n        // something went wrong\n      });\n      ```\n\n      @method then\n      @param {Function} onFulfilled\n      @param {Function} onRejected\n      Useful for tooling.\n      @return {Promise}\n    */\n      then: function(onFulfillment, onRejection) {\n        var parent = this;\n        var state = parent._state;\n\n        if (state === lib$es6$promise$$internal$$FULFILLED && !onFulfillment || state === lib$es6$promise$$internal$$REJECTED && !onRejection) {\n          return this;\n        }\n\n        var child = new this.constructor(lib$es6$promise$$internal$$noop);\n        var result = parent._result;\n\n        if (state) {\n          var callback = arguments[state - 1];\n          lib$es6$promise$asap$$asap(function(){\n            lib$es6$promise$$internal$$invokeCallback(state, child, callback, result);\n          });\n        } else {\n          lib$es6$promise$$internal$$subscribe(parent, child, onFulfillment, onRejection);\n        }\n\n        return child;\n      },\n\n    /**\n      `catch` is simply sugar for `then(undefined, onRejection)` which makes it the same\n      as the catch block of a try/catch statement.\n\n      ```js\n      function findAuthor(){\n        throw new Error('couldn't find that author');\n      }\n\n      // synchronous\n      try {\n        findAuthor();\n      } catch(reason) {\n        // something went wrong\n      }\n\n      // async with promises\n      findAuthor().catch(function(reason){\n        // something went wrong\n      });\n      ```\n\n      @method catch\n      @param {Function} onRejection\n      Useful for tooling.\n      @return {Promise}\n    */\n      'catch': function(onRejection) {\n        return this.then(null, onRejection);\n      }\n    };\n    function lib$es6$promise$polyfill$$polyfill() {\n      var local;\n\n      if (typeof global !== 'undefined') {\n          local = global;\n      } else if (typeof self !== 'undefined') {\n          local = self;\n      } else {\n          try {\n              local = Function('return this')();\n          } catch (e) {\n              throw new Error('polyfill failed because global object is unavailable in this environment');\n          }\n      }\n\n      var P = local.Promise;\n\n      if (P && Object.prototype.toString.call(P.resolve()) === '[object Promise]' && !P.cast) {\n        return;\n      }\n\n      local.Promise = lib$es6$promise$promise$$default;\n    }\n    var lib$es6$promise$polyfill$$default = lib$es6$promise$polyfill$$polyfill;\n\n    var lib$es6$promise$umd$$ES6Promise = {\n      'Promise': lib$es6$promise$promise$$default,\n      'polyfill': lib$es6$promise$polyfill$$default\n    };\n\n    /* global define:true module:true window: true */\n    if (typeof define === 'function' && define['amd']) {\n      define(function() { return lib$es6$promise$umd$$ES6Promise; });\n    } else if (typeof module !== 'undefined' && module['exports']) {\n      module['exports'] = lib$es6$promise$umd$$ES6Promise;\n    } else if (typeof this !== 'undefined') {\n      this['ES6Promise'] = lib$es6$promise$umd$$ES6Promise;\n    }\n\n    lib$es6$promise$polyfill$$default();\n}).call(this);\n\n",
-    "/*\n  Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.\n\n  Redistribution and use in source and binary forms, with or without\n  modification, are permitted provided that the following conditions are met:\n\n    * Redistributions of source code must retain the above copyright\n      notice, this list of conditions and the following disclaimer.\n    * Redistributions in binary form must reproduce the above copyright\n      notice, this list of conditions and the following disclaimer in the\n      documentation and/or other materials provided with the distribution.\n\n  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY\n  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\n  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\n  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n*/\n\n(function (root, factory) {\n    'use strict';\n\n    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,\n    // Rhino, and plain browser loading.\n\n    /* istanbul ignore next */\n    if (typeof define === 'function' && define.amd) {\n        define(['exports'], factory);\n    } else if (typeof exports !== 'undefined') {\n        factory(exports);\n    } else {\n        factory((root.esprima = {}));\n    }\n}(this, function (exports) {\n    'use strict';\n\n    var Token,\n        TokenName,\n        FnExprTokens,\n        Syntax,\n        PlaceHolders,\n        Messages,\n        Regex,\n        source,\n        strict,\n        index,\n        lineNumber,\n        lineStart,\n        hasLineTerminator,\n        lastIndex,\n        lastLineNumber,\n        lastLineStart,\n        startIndex,\n        startLineNumber,\n        startLineStart,\n        scanning,\n        length,\n        lookahead,\n        state,\n        extra,\n        isBindingElement,\n        isAssignmentTarget,\n        firstCoverInitializedNameError;\n\n    Token = {\n        BooleanLiteral: 1,\n        EOF: 2,\n        Identifier: 3,\n        Keyword: 4,\n        NullLiteral: 5,\n        NumericLiteral: 6,\n        Punctuator: 7,\n        StringLiteral: 8,\n        RegularExpression: 9,\n        Template: 10\n    };\n\n    TokenName = {};\n    TokenName[Token.BooleanLiteral] = 'Boolean';\n    TokenName[Token.EOF] = '<end>';\n    TokenName[Token.Identifier] = 'Identifier';\n    TokenName[Token.Keyword] = 'Keyword';\n    TokenName[Token.NullLiteral] = 'Null';\n    TokenName[Token.NumericLiteral] = 'Numeric';\n    TokenName[Token.Punctuator] = 'Punctuator';\n    TokenName[Token.StringLiteral] = 'String';\n    TokenName[Token.RegularExpression] = 'RegularExpression';\n    TokenName[Token.Template] = 'Template';\n\n    // A function following one of those tokens is an expression.\n    FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',\n                    'return', 'case', 'delete', 'throw', 'void',\n                    // assignment operators\n                    '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=',\n                    '&=', '|=', '^=', ',',\n                    // binary/unary operators\n                    '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&',\n                    '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',\n                    '<=', '<', '>', '!=', '!=='];\n\n    Syntax = {\n        AssignmentExpression: 'AssignmentExpression',\n        AssignmentPattern: 'AssignmentPattern',\n        ArrayExpression: 'ArrayExpression',\n        ArrayPattern: 'ArrayPattern',\n        ArrowFunctionExpression: 'ArrowFunctionExpression',\n        BlockStatement: 'BlockStatement',\n        BinaryExpression: 'BinaryExpression',\n        BreakStatement: 'BreakStatement',\n        CallExpression: 'CallExpression',\n        CatchClause: 'CatchClause',\n        ClassBody: 'ClassBody',\n        ClassDeclaration: 'ClassDeclaration',\n        ClassExpression: 'ClassExpression',\n        ConditionalExpression: 'ConditionalExpression',\n        ContinueStatement: 'ContinueStatement',\n        DoWhileStatement: 'DoWhileStatement',\n        DebuggerStatement: 'DebuggerStatement',\n        EmptyStatement: 'EmptyStatement',\n        ExportAllDeclaration: 'ExportAllDeclaration',\n        ExportDefaultDeclaration: 'ExportDefaultDeclaration',\n        ExportNamedDeclaration: 'ExportNamedDeclaration',\n        ExportSpecifier: 'ExportSpecifier',\n        ExpressionStatement: 'ExpressionStatement',\n        ForStatement: 'ForStatement',\n        ForOfStatement: 'ForOfStatement',\n        ForInStatement: 'ForInStatement',\n        FunctionDeclaration: 'FunctionDeclaration',\n        FunctionExpression: 'FunctionExpression',\n        Identifier: 'Identifier',\n        IfStatement: 'IfStatement',\n        ImportDeclaration: 'ImportDeclaration',\n        ImportDefaultSpecifier: 'ImportDefaultSpecifier',\n        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',\n        ImportSpecifier: 'ImportSpecifier',\n        Literal: 'Literal',\n        LabeledStatement: 'LabeledStatement',\n        LogicalExpression: 'LogicalExpression',\n        MemberExpression: 'MemberExpression',\n        MetaProperty: 'MetaProperty',\n        MethodDefinition: 'MethodDefinition',\n        NewExpression: 'NewExpression',\n        ObjectExpression: 'ObjectExpression',\n        ObjectPattern: 'ObjectPattern',\n        Program: 'Program',\n        Property: 'Property',\n        RestElement: 'RestElement',\n        ReturnStatement: 'ReturnStatement',\n        SequenceExpression: 'SequenceExpression',\n        SpreadElement: 'SpreadElement',\n        Super: 'Super',\n        SwitchCase: 'SwitchCase',\n        SwitchStatement: 'SwitchStatement',\n        TaggedTemplateExpression: 'TaggedTemplateExpression',\n        TemplateElement: 'TemplateElement',\n        TemplateLiteral: 'TemplateLiteral',\n        ThisExpression: 'ThisExpression',\n        ThrowStatement: 'ThrowStatement',\n        TryStatement: 'TryStatement',\n        UnaryExpression: 'UnaryExpression',\n        UpdateExpression: 'UpdateExpression',\n        VariableDeclaration: 'VariableDeclaration',\n        VariableDeclarator: 'VariableDeclarator',\n        WhileStatement: 'WhileStatement',\n        WithStatement: 'WithStatement',\n        YieldExpression: 'YieldExpression'\n    };\n\n    PlaceHolders = {\n        ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder'\n    };\n\n    // Error messages should be identical to V8.\n    Messages = {\n        UnexpectedToken: 'Unexpected token %0',\n        UnexpectedNumber: 'Unexpected number',\n        UnexpectedString: 'Unexpected string',\n        UnexpectedIdentifier: 'Unexpected identifier',\n        UnexpectedReserved: 'Unexpected reserved word',\n        UnexpectedTemplate: 'Unexpected quasi %0',\n        UnexpectedEOS: 'Unexpected end of input',\n        NewlineAfterThrow: 'Illegal newline after throw',\n        InvalidRegExp: 'Invalid regular expression',\n        UnterminatedRegExp: 'Invalid regular expression: missing /',\n        InvalidLHSInAssignment: 'Invalid left-hand side in assignment',\n        InvalidLHSInForIn: 'Invalid left-hand side in for-in',\n        InvalidLHSInForLoop: 'Invalid left-hand side in for-loop',\n        MultipleDefaultsInSwitch: 'More than one default clause in switch statement',\n        NoCatchOrFinally: 'Missing catch or finally after try',\n        UnknownLabel: 'Undefined label \\'%0\\'',\n        Redeclaration: '%0 \\'%1\\' has already been declared',\n        IllegalContinue: 'Illegal continue statement',\n        IllegalBreak: 'Illegal break statement',\n        IllegalReturn: 'Illegal return statement',\n        StrictModeWith: 'Strict mode code may not include a with statement',\n        StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode',\n        StrictVarName: 'Variable name may not be eval or arguments in strict mode',\n        StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode',\n        StrictParamDupe: 'Strict mode function may not have duplicate parameter names',\n        StrictFunctionName: 'Function name may not be eval or arguments in strict mode',\n        StrictOctalLiteral: 'Octal literals are not allowed in strict mode.',\n        StrictDelete: 'Delete of an unqualified identifier in strict mode.',\n        StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode',\n        StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode',\n        StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode',\n        StrictReservedWord: 'Use of future reserved word in strict mode',\n        TemplateOctalLiteral: 'Octal literals are not allowed in template strings.',\n        ParameterAfterRestParameter: 'Rest parameter must be last formal parameter',\n        DefaultRestParameter: 'Unexpected token =',\n        ObjectPatternAsRestParameter: 'Unexpected token {',\n        DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals',\n        ConstructorSpecialMethod: 'Class constructor may not be an accessor',\n        DuplicateConstructor: 'A class may only have one constructor',\n        StaticPrototype: 'Classes may not have static property named prototype',\n        MissingFromClause: 'Unexpected token',\n        NoAsAfterImportNamespace: 'Unexpected token',\n        InvalidModuleSpecifier: 'Unexpected token',\n        IllegalImportDeclaration: 'Unexpected token',\n        IllegalExportDeclaration: 'Unexpected token',\n        DuplicateBinding: 'Duplicate binding %0'\n    };\n\n    // See also tools/generate-unicode-regex.js.\n    Regex = {\n        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart:\n        NonAsciiIdentifierStart: /[\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u064A\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE\\u06EF\\u06FA-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07CA-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u08A0-\\u08B2\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B71\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58\\u0C59\\u0C60\\u0C61\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CF1\\u0CF2\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D60\\u0D61\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EDC-\\u0EDF\\u0F00\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1380-\\u138F\\u13A0-\\u13F4\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u1820-\\u1877\\u1880-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1950-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19C1-\\u19C7\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B83-\\u1BA0\\u1BAE\\u1BAF\\u1BBA-\\u1BE5\\u1C00-\\u1C23\\u1C4D-\\u1C4F\\u1C5A-\\u1C7D\\u1CE9-\\u1CEC\\u1CEE-\\u1CF1\\u1CF5\\u1CF6\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2071\\u207F\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2118-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2160-\\u2188\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u309B-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312D\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FCC\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA61F\\uA62A\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6EF\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA78E\\uA790-\\uA7AD\\uA7B0\\uA7B1\\uA7F7-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA840-\\uA873\\uA882-\\uA8B3\\uA8F2-\\uA8F7\\uA8FB\\uA90A-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF\\uA9E0-\\uA9E4\\uA9E6-\\uA9EF\\uA9FA-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB5F\\uAB64\\uAB65\\uABC0-\\uABE2\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]|\\uD800[\\uDC00-\\uDC0B\\uDC0D-\\uDC26\\uDC28-\\uDC3A\\uDC3C\\uDC3D\\uDC3F-\\uDC4D\\uDC50-\\uDC5D\\uDC80-\\uDCFA\\uDD40-\\uDD74\\uDE80-\\uDE9C\\uDEA0-\\uDED0\\uDF00-\\uDF1F\\uDF30-\\uDF4A\\uDF50-\\uDF75\\uDF80-\\uDF9D\\uDFA0-\\uDFC3\\uDFC8-\\uDFCF\\uDFD1-\\uDFD5]|\\uD801[\\uDC00-\\uDC9D\\uDD00-\\uDD27\\uDD30-\\uDD63\\uDE00-\\uDF36\\uDF40-\\uDF55\\uDF60-\\uDF67]|\\uD802[\\uDC00-\\uDC05\\uDC08\\uDC0A-\\uDC35\\uDC37\\uDC38\\uDC3C\\uDC3F-\\uDC55\\uDC60-\\uDC76\\uDC80-\\uDC9E\\uDD00-\\uDD15\\uDD20-\\uDD39\\uDD80-\\uDDB7\\uDDBE\\uDDBF\\uDE00\\uDE10-\\uDE13\\uDE15-\\uDE17\\uDE19-\\uDE33\\uDE60-\\uDE7C\\uDE80-\\uDE9C\\uDEC0-\\uDEC7\\uDEC9-\\uDEE4\\uDF00-\\uDF35\\uDF40-\\uDF55\\uDF60-\\uDF72\\uDF80-\\uDF91]|\\uD803[\\uDC00-\\uDC48]|\\uD804[\\uDC03-\\uDC37\\uDC83-\\uDCAF\\uDCD0-\\uDCE8\\uDD03-\\uDD26\\uDD50-\\uDD72\\uDD76\\uDD83-\\uDDB2\\uDDC1-\\uDDC4\\uDDDA\\uDE00-\\uDE11\\uDE13-\\uDE2B\\uDEB0-\\uDEDE\\uDF05-\\uDF0C\\uDF0F\\uDF10\\uDF13-\\uDF28\\uDF2A-\\uDF30\\uDF32\\uDF33\\uDF35-\\uDF39\\uDF3D\\uDF5D-\\uDF61]|\\uD805[\\uDC80-\\uDCAF\\uDCC4\\uDCC5\\uDCC7\\uDD80-\\uDDAE\\uDE00-\\uDE2F\\uDE44\\uDE80-\\uDEAA]|\\uD806[\\uDCA0-\\uDCDF\\uDCFF\\uDEC0-\\uDEF8]|\\uD808[\\uDC00-\\uDF98]|\\uD809[\\uDC00-\\uDC6E]|[\\uD80C\\uD840-\\uD868\\uD86A-\\uD86C][\\uDC00-\\uDFFF]|\\uD80D[\\uDC00-\\uDC2E]|\\uD81A[\\uDC00-\\uDE38\\uDE40-\\uDE5E\\uDED0-\\uDEED\\uDF00-\\uDF2F\\uDF40-\\uDF43\\uDF63-\\uDF77\\uDF7D-\\uDF8F]|\\uD81B[\\uDF00-\\uDF44\\uDF50\\uDF93-\\uDF9F]|\\uD82C[\\uDC00\\uDC01]|\\uD82F[\\uDC00-\\uDC6A\\uDC70-\\uDC7C\\uDC80-\\uDC88\\uDC90-\\uDC99]|\\uD835[\\uDC00-\\uDC54\\uDC56-\\uDC9C\\uDC9E\\uDC9F\\uDCA2\\uDCA5\\uDCA6\\uDCA9-\\uDCAC\\uDCAE-\\uDCB9\\uDCBB\\uDCBD-\\uDCC3\\uDCC5-\\uDD05\\uDD07-\\uDD0A\\uDD0D-\\uDD14\\uDD16-\\uDD1C\\uDD1E-\\uDD39\\uDD3B-\\uDD3E\\uDD40-\\uDD44\\uDD46\\uDD4A-\\uDD50\\uDD52-\\uDEA5\\uDEA8-\\uDEC0\\uDEC2-\\uDEDA\\uDEDC-\\uDEFA\\uDEFC-\\uDF14\\uDF16-\\uDF34\\uDF36-\\uDF4E\\uDF50-\\uDF6E\\uDF70-\\uDF88\\uDF8A-\\uDFA8\\uDFAA-\\uDFC2\\uDFC4-\\uDFCB]|\\uD83A[\\uDC00-\\uDCC4]|\\uD83B[\\uDE00-\\uDE03\\uDE05-\\uDE1F\\uDE21\\uDE22\\uDE24\\uDE27\\uDE29-\\uDE32\\uDE34-\\uDE37\\uDE39\\uDE3B\\uDE42\\uDE47\\uDE49\\uDE4B\\uDE4D-\\uDE4F\\uDE51\\uDE52\\uDE54\\uDE57\\uDE59\\uDE5B\\uDE5D\\uDE5F\\uDE61\\uDE62\\uDE64\\uDE67-\\uDE6A\\uDE6C-\\uDE72\\uDE74-\\uDE77\\uDE79-\\uDE7C\\uDE7E\\uDE80-\\uDE89\\uDE8B-\\uDE9B\\uDEA1-\\uDEA3\\uDEA5-\\uDEA9\\uDEAB-\\uDEBB]|\\uD869[\\uDC00-\\uDED6\\uDF00-\\uDFFF]|\\uD86D[\\uDC00-\\uDF34\\uDF40-\\uDFFF]|\\uD86E[\\uDC00-\\uDC1D]|\\uD87E[\\uDC00-\\uDE1D]/,\n\n        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart:\n        NonAsciiIdentifierPart: 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   };\n\n    // Ensure the condition is true, otherwise throw an error.\n    // This is only to have a better contract semantic, i.e. another safety net\n    // to catch a logic error. The condition shall be fulfilled in normal case.\n    // Do NOT use this to enforce a certain condition on any user input.\n\n    function assert(condition, message) {\n        /* istanbul ignore if */\n        if (!condition) {\n            throw new Error('ASSERT: ' + message);\n        }\n    }\n\n    function isDecimalDigit(ch) {\n        return (ch >= 0x30 && ch <= 0x39);   // 0..9\n    }\n\n    function isHexDigit(ch) {\n        return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;\n    }\n\n    function isOctalDigit(ch) {\n        return '01234567'.indexOf(ch) >= 0;\n    }\n\n    function octalToDecimal(ch) {\n        // \\0 is not octal escape sequence\n        var octal = (ch !== '0'), code = '01234567'.indexOf(ch);\n\n        if (index < length && isOctalDigit(source[index])) {\n            octal = true;\n            code = code * 8 + '01234567'.indexOf(source[index++]);\n\n            // 3 digits are only allowed when string starts\n            // with 0, 1, 2, 3\n            if ('0123'.indexOf(ch) >= 0 &&\n                    index < length &&\n                    isOctalDigit(source[index])) {\n                code = code * 8 + '01234567'.indexOf(source[index++]);\n            }\n        }\n\n        return {\n            code: code,\n            octal: octal\n        };\n    }\n\n    // ECMA-262 11.2 White Space\n\n    function isWhiteSpace(ch) {\n        return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) ||\n            (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0);\n    }\n\n    // ECMA-262 11.3 Line Terminators\n\n    function isLineTerminator(ch) {\n        return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029);\n    }\n\n    // ECMA-262 11.6 Identifier Names and Identifiers\n\n    function fromCodePoint(cp) {\n        return (cp < 0x10000) ? String.fromCharCode(cp) :\n            String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) +\n            String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023));\n    }\n\n    function isIdentifierStart(ch) {\n        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)\n            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z\n            (ch >= 0x61 && ch <= 0x7A) ||         // a..z\n            (ch === 0x5C) ||                      // \\ (backslash)\n            ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch)));\n    }\n\n    function isIdentifierPart(ch) {\n        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)\n            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z\n            (ch >= 0x61 && ch <= 0x7A) ||         // a..z\n            (ch >= 0x30 && ch <= 0x39) ||         // 0..9\n            (ch === 0x5C) ||                      // \\ (backslash)\n            ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch)));\n    }\n\n    // ECMA-262 11.6.2.2 Future Reserved Words\n\n    function isFutureReservedWord(id) {\n        switch (id) {\n        case 'enum':\n        case 'export':\n        case 'import':\n        case 'super':\n            return true;\n        default:\n            return false;\n        }\n    }\n\n    function isStrictModeReservedWord(id) {\n        switch (id) {\n        case 'implements':\n        case 'interface':\n        case 'package':\n        case 'private':\n        case 'protected':\n        case 'public':\n        case 'static':\n        case 'yield':\n        case 'let':\n            return true;\n        default:\n            return false;\n        }\n    }\n\n    function isRestrictedWord(id) {\n        return id === 'eval' || id === 'arguments';\n    }\n\n    // ECMA-262 11.6.2.1 Keywords\n\n    function isKeyword(id) {\n        switch (id.length) {\n        case 2:\n            return (id === 'if') || (id === 'in') || (id === 'do');\n        case 3:\n            return (id === 'var') || (id === 'for') || (id === 'new') ||\n                (id === 'try') || (id === 'let');\n        case 4:\n            return (id === 'this') || (id === 'else') || (id === 'case') ||\n                (id === 'void') || (id === 'with') || (id === 'enum');\n        case 5:\n            return (id === 'while') || (id === 'break') || (id === 'catch') ||\n                (id === 'throw') || (id === 'const') || (id === 'yield') ||\n                (id === 'class') || (id === 'super');\n        case 6:\n            return (id === 'return') || (id === 'typeof') || (id === 'delete') ||\n                (id === 'switch') || (id === 'export') || (id === 'import');\n        case 7:\n            return (id === 'default') || (id === 'finally') || (id === 'extends');\n        case 8:\n            return (id === 'function') || (id === 'continue') || (id === 'debugger');\n        case 10:\n            return (id === 'instanceof');\n        default:\n            return false;\n        }\n    }\n\n    // ECMA-262 11.4 Comments\n\n    function addComment(type, value, start, end, loc) {\n        var comment;\n\n        assert(typeof start === 'number', 'Comment must have valid position');\n\n        state.lastCommentStart = start;\n\n        comment = {\n            type: type,\n            value: value\n        };\n        if (extra.range) {\n            comment.range = [start, end];\n        }\n        if (extra.loc) {\n            comment.loc = loc;\n        }\n        extra.comments.push(comment);\n        if (extra.attachComment) {\n            extra.leadingComments.push(comment);\n            extra.trailingComments.push(comment);\n        }\n        if (extra.tokenize) {\n            comment.type = comment.type + 'Comment';\n            if (extra.delegate) {\n                comment = extra.delegate(comment);\n            }\n            extra.tokens.push(comment);\n        }\n    }\n\n    function skipSingleLineComment(offset) {\n        var start, loc, ch, comment;\n\n        start = index - offset;\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart - offset\n            }\n        };\n\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            ++index;\n            if (isLineTerminator(ch)) {\n                hasLineTerminator = true;\n                if (extra.comments) {\n                    comment = source.slice(start + offset, index - 1);\n                    loc.end = {\n                        line: lineNumber,\n                        column: index - lineStart - 1\n                    };\n                    addComment('Line', comment, start, index - 1, loc);\n                }\n                if (ch === 13 && source.charCodeAt(index) === 10) {\n                    ++index;\n                }\n                ++lineNumber;\n                lineStart = index;\n                return;\n            }\n        }\n\n        if (extra.comments) {\n            comment = source.slice(start + offset, index);\n            loc.end = {\n                line: lineNumber,\n                column: index - lineStart\n            };\n            addComment('Line', comment, start, index, loc);\n        }\n    }\n\n    function skipMultiLineComment() {\n        var start, loc, ch, comment;\n\n        if (extra.comments) {\n            start = index - 2;\n            loc = {\n                start: {\n                    line: lineNumber,\n                    column: index - lineStart - 2\n                }\n            };\n        }\n\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (isLineTerminator(ch)) {\n                if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) {\n                    ++index;\n                }\n                hasLineTerminator = true;\n                ++lineNumber;\n                ++index;\n                lineStart = index;\n            } else if (ch === 0x2A) {\n                // Block comment ends with '*/'.\n                if (source.charCodeAt(index + 1) === 0x2F) {\n                    ++index;\n                    ++index;\n                    if (extra.comments) {\n                        comment = source.slice(start + 2, index - 2);\n                        loc.end = {\n                            line: lineNumber,\n                            column: index - lineStart\n                        };\n                        addComment('Block', comment, start, index, loc);\n                    }\n                    return;\n                }\n                ++index;\n            } else {\n                ++index;\n            }\n        }\n\n        // Ran off the end of the file - the whole thing is a comment\n        if (extra.comments) {\n            loc.end = {\n                line: lineNumber,\n                column: index - lineStart\n            };\n            comment = source.slice(start + 2, index);\n            addComment('Block', comment, start, index, loc);\n        }\n        tolerateUnexpectedToken();\n    }\n\n    function skipComment() {\n        var ch, start;\n        hasLineTerminator = false;\n\n        start = (index === 0);\n        while (index < length) {\n            ch = source.charCodeAt(index);\n\n            if (isWhiteSpace(ch)) {\n                ++index;\n            } else if (isLineTerminator(ch)) {\n                hasLineTerminator = true;\n                ++index;\n                if (ch === 0x0D && source.charCodeAt(index) === 0x0A) {\n                    ++index;\n                }\n                ++lineNumber;\n                lineStart = index;\n                start = true;\n            } else if (ch === 0x2F) { // U+002F is '/'\n                ch = source.charCodeAt(index + 1);\n                if (ch === 0x2F) {\n                    ++index;\n                    ++index;\n                    skipSingleLineComment(2);\n                    start = true;\n                } else if (ch === 0x2A) {  // U+002A is '*'\n                    ++index;\n                    ++index;\n                    skipMultiLineComment();\n                } else {\n                    break;\n                }\n            } else if (start && ch === 0x2D) { // U+002D is '-'\n                // U+003E is '>'\n                if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) {\n                    // '-->' is a single-line comment\n                    index += 3;\n                    skipSingleLineComment(3);\n                } else {\n                    break;\n                }\n            } else if (ch === 0x3C) { // U+003C is '<'\n                if (source.slice(index + 1, index + 4) === '!--') {\n                    ++index; // `<`\n                    ++index; // `!`\n                    ++index; // `-`\n                    ++index; // `-`\n                    skipSingleLineComment(4);\n                } else {\n                    break;\n                }\n            } else {\n                break;\n            }\n        }\n    }\n\n    function scanHexEscape(prefix) {\n        var i, len, ch, code = 0;\n\n        len = (prefix === 'u') ? 4 : 2;\n        for (i = 0; i < len; ++i) {\n            if (index < length && isHexDigit(source[index])) {\n                ch = source[index++];\n                code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());\n            } else {\n                return '';\n            }\n        }\n        return String.fromCharCode(code);\n    }\n\n    function scanUnicodeCodePointEscape() {\n        var ch, code;\n\n        ch = source[index];\n        code = 0;\n\n        // At least, one hex digit is required.\n        if (ch === '}') {\n            throwUnexpectedToken();\n        }\n\n        while (index < length) {\n            ch = source[index++];\n            if (!isHexDigit(ch)) {\n                break;\n            }\n            code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());\n        }\n\n        if (code > 0x10FFFF || ch !== '}') {\n            throwUnexpectedToken();\n        }\n\n        return fromCodePoint(code);\n    }\n\n    function codePointAt(i) {\n        var cp, first, second;\n\n        cp = source.charCodeAt(i);\n        if (cp >= 0xD800 && cp <= 0xDBFF) {\n            second = source.charCodeAt(i + 1);\n            if (second >= 0xDC00 && second <= 0xDFFF) {\n                first = cp;\n                cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;\n            }\n        }\n\n        return cp;\n    }\n\n    function getComplexIdentifier() {\n        var cp, ch, id;\n\n        cp = codePointAt(index);\n        id = fromCodePoint(cp);\n        index += id.length;\n\n        // '\\u' (U+005C, U+0075) denotes an escaped character.\n        if (cp === 0x5C) {\n            if (source.charCodeAt(index) !== 0x75) {\n                throwUnexpectedToken();\n            }\n            ++index;\n            if (source[index] === '{') {\n                ++index;\n                ch = scanUnicodeCodePointEscape();\n            } else {\n                ch = scanHexEscape('u');\n                cp = ch.charCodeAt(0);\n                if (!ch || ch === '\\\\' || !isIdentifierStart(cp)) {\n                    throwUnexpectedToken();\n                }\n            }\n            id = ch;\n        }\n\n        while (index < length) {\n            cp = codePointAt(index);\n            if (!isIdentifierPart(cp)) {\n                break;\n            }\n            ch = fromCodePoint(cp);\n            id += ch;\n            index += ch.length;\n\n            // '\\u' (U+005C, U+0075) denotes an escaped character.\n            if (cp === 0x5C) {\n                id = id.substr(0, id.length - 1);\n                if (source.charCodeAt(index) !== 0x75) {\n                    throwUnexpectedToken();\n                }\n                ++index;\n                if (source[index] === '{') {\n                    ++index;\n                    ch = scanUnicodeCodePointEscape();\n                } else {\n                    ch = scanHexEscape('u');\n                    cp = ch.charCodeAt(0);\n                    if (!ch || ch === '\\\\' || !isIdentifierPart(cp)) {\n                        throwUnexpectedToken();\n                    }\n                }\n                id += ch;\n            }\n        }\n\n        return id;\n    }\n\n    function getIdentifier() {\n        var start, ch;\n\n        start = index++;\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (ch === 0x5C) {\n                // Blackslash (U+005C) marks Unicode escape sequence.\n                index = start;\n                return getComplexIdentifier();\n            } else if (ch >= 0xD800 && ch < 0xDFFF) {\n                // Need to handle surrogate pairs.\n                index = start;\n                return getComplexIdentifier();\n            }\n            if (isIdentifierPart(ch)) {\n                ++index;\n            } else {\n                break;\n            }\n        }\n\n        return source.slice(start, index);\n    }\n\n    function scanIdentifier() {\n        var start, id, type;\n\n        start = index;\n\n        // Backslash (U+005C) starts an escaped character.\n        id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : getIdentifier();\n\n        // There is no keyword or literal with only one character.\n        // Thus, it must be an identifier.\n        if (id.length === 1) {\n            type = Token.Identifier;\n        } else if (isKeyword(id)) {\n            type = Token.Keyword;\n        } else if (id === 'null') {\n            type = Token.NullLiteral;\n        } else if (id === 'true' || id === 'false') {\n            type = Token.BooleanLiteral;\n        } else {\n            type = Token.Identifier;\n        }\n\n        return {\n            type: type,\n            value: id,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n\n    // ECMA-262 11.7 Punctuators\n\n    function scanPunctuator() {\n        var token, str;\n\n        token = {\n            type: Token.Punctuator,\n            value: '',\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: index,\n            end: index\n        };\n\n        // Check for most common single-character punctuators.\n        str = source[index];\n        switch (str) {\n\n        case '(':\n            if (extra.tokenize) {\n                extra.openParenToken = extra.tokenValues.length;\n            }\n            ++index;\n            break;\n\n        case '{':\n            if (extra.tokenize) {\n                extra.openCurlyToken = extra.tokenValues.length;\n            }\n            state.curlyStack.push('{');\n            ++index;\n            break;\n\n        case '.':\n            ++index;\n            if (source[index] === '.' && source[index + 1] === '.') {\n                // Spread operator: ...\n                index += 2;\n                str = '...';\n            }\n            break;\n\n        case '}':\n            ++index;\n            state.curlyStack.pop();\n            break;\n        case ')':\n        case ';':\n        case ',':\n        case '[':\n        case ']':\n        case ':':\n        case '?':\n        case '~':\n            ++index;\n            break;\n\n        default:\n            // 4-character punctuator.\n            str = source.substr(index, 4);\n            if (str === '>>>=') {\n                index += 4;\n            } else {\n\n                // 3-character punctuators.\n                str = str.substr(0, 3);\n                if (str === '===' || str === '!==' || str === '>>>' ||\n                    str === '<<=' || str === '>>=') {\n                    index += 3;\n                } else {\n\n                    // 2-character punctuators.\n                    str = str.substr(0, 2);\n                    if (str === '&&' || str === '||' || str === '==' || str === '!=' ||\n                        str === '+=' || str === '-=' || str === '*=' || str === '/=' ||\n                        str === '++' || str === '--' || str === '<<' || str === '>>' ||\n                        str === '&=' || str === '|=' || str === '^=' || str === '%=' ||\n                        str === '<=' || str === '>=' || str === '=>') {\n                        index += 2;\n                    } else {\n\n                        // 1-character punctuators.\n                        str = source[index];\n                        if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {\n                            ++index;\n                        }\n                    }\n                }\n            }\n        }\n\n        if (index === token.start) {\n            throwUnexpectedToken();\n        }\n\n        token.end = index;\n        token.value = str;\n        return token;\n    }\n\n    // ECMA-262 11.8.3 Numeric Literals\n\n    function scanHexLiteral(start) {\n        var number = '';\n\n        while (index < length) {\n            if (!isHexDigit(source[index])) {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (number.length === 0) {\n            throwUnexpectedToken();\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt('0x' + number, 16),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function scanBinaryLiteral(start) {\n        var ch, number;\n\n        number = '';\n\n        while (index < length) {\n            ch = source[index];\n            if (ch !== '0' && ch !== '1') {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (number.length === 0) {\n            // only 0b or 0B\n            throwUnexpectedToken();\n        }\n\n        if (index < length) {\n            ch = source.charCodeAt(index);\n            /* istanbul ignore else */\n            if (isIdentifierStart(ch) || isDecimalDigit(ch)) {\n                throwUnexpectedToken();\n            }\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt(number, 2),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function scanOctalLiteral(prefix, start) {\n        var number, octal;\n\n        if (isOctalDigit(prefix)) {\n            octal = true;\n            number = '0' + source[index++];\n        } else {\n            octal = false;\n            ++index;\n            number = '';\n        }\n\n        while (index < length) {\n            if (!isOctalDigit(source[index])) {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (!octal && number.length === 0) {\n            // only 0o or 0O\n            throwUnexpectedToken();\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt(number, 8),\n            octal: octal,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function isImplicitOctalLiteral() {\n        var i, ch;\n\n        // Implicit octal, unless there is a non-octal digit.\n        // (Annex B.1.1 on Numeric Literals)\n        for (i = index + 1; i < length; ++i) {\n            ch = source[i];\n            if (ch === '8' || ch === '9') {\n                return false;\n            }\n            if (!isOctalDigit(ch)) {\n                return true;\n            }\n        }\n\n        return true;\n    }\n\n    function scanNumericLiteral() {\n        var number, start, ch;\n\n        ch = source[index];\n        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),\n            'Numeric literal must start with a decimal digit or a decimal point');\n\n        start = index;\n        number = '';\n        if (ch !== '.') {\n            number = source[index++];\n            ch = source[index];\n\n            // Hex number starts with '0x'.\n            // Octal number starts with '0'.\n            // Octal number in ES6 starts with '0o'.\n            // Binary number in ES6 starts with '0b'.\n            if (number === '0') {\n                if (ch === 'x' || ch === 'X') {\n                    ++index;\n                    return scanHexLiteral(start);\n                }\n                if (ch === 'b' || ch === 'B') {\n                    ++index;\n                    return scanBinaryLiteral(start);\n                }\n                if (ch === 'o' || ch === 'O') {\n                    return scanOctalLiteral(ch, start);\n                }\n\n                if (isOctalDigit(ch)) {\n                    if (isImplicitOctalLiteral()) {\n                        return scanOctalLiteral(ch, start);\n                    }\n                }\n            }\n\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === '.') {\n            number += source[index++];\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === 'e' || ch === 'E') {\n            number += source[index++];\n\n            ch = source[index];\n            if (ch === '+' || ch === '-') {\n                number += source[index++];\n            }\n            if (isDecimalDigit(source.charCodeAt(index))) {\n                while (isDecimalDigit(source.charCodeAt(index))) {\n                    number += source[index++];\n                }\n            } else {\n                throwUnexpectedToken();\n            }\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseFloat(number),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.4 String Literals\n\n    function scanStringLiteral() {\n        var str = '', quote, start, ch, unescaped, octToDec, octal = false;\n\n        quote = source[index];\n        assert((quote === '\\'' || quote === '\"'),\n            'String literal must starts with a quote');\n\n        start = index;\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n\n            if (ch === quote) {\n                quote = '';\n                break;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'u':\n                    case 'x':\n                        if (source[index] === '{') {\n                            ++index;\n                            str += scanUnicodeCodePointEscape();\n                        } else {\n                            unescaped = scanHexEscape(ch);\n                            if (!unescaped) {\n                                throw throwUnexpectedToken();\n                            }\n                            str += unescaped;\n                        }\n                        break;\n                    case 'n':\n                        str += '\\n';\n                        break;\n                    case 'r':\n                        str += '\\r';\n                        break;\n                    case 't':\n                        str += '\\t';\n                        break;\n                    case 'b':\n                        str += '\\b';\n                        break;\n                    case 'f':\n                        str += '\\f';\n                        break;\n                    case 'v':\n                        str += '\\x0B';\n                        break;\n                    case '8':\n                    case '9':\n                        str += ch;\n                        tolerateUnexpectedToken();\n                        break;\n\n                    default:\n                        if (isOctalDigit(ch)) {\n                            octToDec = octalToDecimal(ch);\n\n                            octal = octToDec.octal || octal;\n                            str += String.fromCharCode(octToDec.code);\n                        } else {\n                            str += ch;\n                        }\n                        break;\n                    }\n                } else {\n                    ++lineNumber;\n                    if (ch === '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                    lineStart = index;\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                break;\n            } else {\n                str += ch;\n            }\n        }\n\n        if (quote !== '') {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.StringLiteral,\n            value: str,\n            octal: octal,\n            lineNumber: startLineNumber,\n            lineStart: startLineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.6 Template Literal Lexical Components\n\n    function scanTemplate() {\n        var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped;\n\n        terminated = false;\n        tail = false;\n        start = index;\n        head = (source[index] === '`');\n        rawOffset = 2;\n\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n            if (ch === '`') {\n                rawOffset = 1;\n                tail = true;\n                terminated = true;\n                break;\n            } else if (ch === '$') {\n                if (source[index] === '{') {\n                    state.curlyStack.push('${');\n                    ++index;\n                    terminated = true;\n                    break;\n                }\n                cooked += ch;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'n':\n                        cooked += '\\n';\n                        break;\n                    case 'r':\n                        cooked += '\\r';\n                        break;\n                    case 't':\n                        cooked += '\\t';\n                        break;\n                    case 'u':\n                    case 'x':\n                        if (source[index] === '{') {\n                            ++index;\n                            cooked += scanUnicodeCodePointEscape();\n                        } else {\n                            restore = index;\n                            unescaped = scanHexEscape(ch);\n                            if (unescaped) {\n                                cooked += unescaped;\n                            } else {\n                                index = restore;\n                                cooked += ch;\n                            }\n                        }\n                        break;\n                    case 'b':\n                        cooked += '\\b';\n                        break;\n                    case 'f':\n                        cooked += '\\f';\n                        break;\n                    case 'v':\n                        cooked += '\\v';\n                        break;\n\n                    default:\n                        if (ch === '0') {\n                            if (isDecimalDigit(source.charCodeAt(index))) {\n                                // Illegal: \\01 \\02 and so on\n                                throwError(Messages.TemplateOctalLiteral);\n                            }\n                            cooked += '\\0';\n                        } else if (isOctalDigit(ch)) {\n                            // Illegal: \\1 \\2\n                            throwError(Messages.TemplateOctalLiteral);\n                        } else {\n                            cooked += ch;\n                        }\n                        break;\n                    }\n                } else {\n                    ++lineNumber;\n                    if (ch === '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                    lineStart = index;\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                ++lineNumber;\n                if (ch === '\\r' && source[index] === '\\n') {\n                    ++index;\n                }\n                lineStart = index;\n                cooked += '\\n';\n            } else {\n                cooked += ch;\n            }\n        }\n\n        if (!terminated) {\n            throwUnexpectedToken();\n        }\n\n        if (!head) {\n            state.curlyStack.pop();\n        }\n\n        return {\n            type: Token.Template,\n            value: {\n                cooked: cooked,\n                raw: source.slice(start + 1, index - rawOffset)\n            },\n            head: head,\n            tail: tail,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.5 Regular Expression Literals\n\n    function testRegExp(pattern, flags) {\n        // The BMP character to use as a replacement for astral symbols when\n        // translating an ES6 \"u\"-flagged pattern to an ES5-compatible\n        // approximation.\n        // Note: replacing with '\\uFFFF' enables false positives in unlikely\n        // scenarios. For example, `[\\u{1044f}-\\u{10440}]` is an invalid\n        // pattern that would not be detected by this substitution.\n        var astralSubstitute = '\\uFFFF',\n            tmp = pattern;\n\n        if (flags.indexOf('u') >= 0) {\n            tmp = tmp\n                // Replace every Unicode escape sequence with the equivalent\n                // BMP character or a constant ASCII code point in the case of\n                // astral symbols. (See the above note on `astralSubstitute`\n                // for more information.)\n                .replace(/\\\\u\\{([0-9a-fA-F]+)\\}|\\\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) {\n                    var codePoint = parseInt($1 || $2, 16);\n                    if (codePoint > 0x10FFFF) {\n                        throwUnexpectedToken(null, Messages.InvalidRegExp);\n                    }\n                    if (codePoint <= 0xFFFF) {\n                        return String.fromCharCode(codePoint);\n                    }\n                    return astralSubstitute;\n                })\n                // Replace each paired surrogate with a single ASCII symbol to\n                // avoid throwing on regular expressions that are only valid in\n                // combination with the \"u\" flag.\n                .replace(\n                    /[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]/g,\n                    astralSubstitute\n                );\n        }\n\n        // First, detect invalid regular expressions.\n        try {\n            RegExp(tmp);\n        } catch (e) {\n            throwUnexpectedToken(null, Messages.InvalidRegExp);\n        }\n\n        // Return a regular expression object for this pattern-flag pair, or\n        // `null` in case the current environment doesn't support the flags it\n        // uses.\n        try {\n            return new RegExp(pattern, flags);\n        } catch (exception) {\n            return null;\n        }\n    }\n\n    function scanRegExpBody() {\n        var ch, str, classMarker, terminated, body;\n\n        ch = source[index];\n        assert(ch === '/', 'Regular expression literal must start with a slash');\n        str = source[index++];\n\n        classMarker = false;\n        terminated = false;\n        while (index < length) {\n            ch = source[index++];\n            str += ch;\n            if (ch === '\\\\') {\n                ch = source[index++];\n                // ECMA-262 7.8.5\n                if (isLineTerminator(ch.charCodeAt(0))) {\n                    throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n                }\n                str += ch;\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n            } else if (classMarker) {\n                if (ch === ']') {\n                    classMarker = false;\n                }\n            } else {\n                if (ch === '/') {\n                    terminated = true;\n                    break;\n                } else if (ch === '[') {\n                    classMarker = true;\n                }\n            }\n        }\n\n        if (!terminated) {\n            throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n        }\n\n        // Exclude leading and trailing slash.\n        body = str.substr(1, str.length - 2);\n        return {\n            value: body,\n            literal: str\n        };\n    }\n\n    function scanRegExpFlags() {\n        var ch, str, flags, restore;\n\n        str = '';\n        flags = '';\n        while (index < length) {\n            ch = source[index];\n            if (!isIdentifierPart(ch.charCodeAt(0))) {\n                break;\n            }\n\n            ++index;\n            if (ch === '\\\\' && index < length) {\n                ch = source[index];\n                if (ch === 'u') {\n                    ++index;\n                    restore = index;\n                    ch = scanHexEscape('u');\n                    if (ch) {\n                        flags += ch;\n                        for (str += '\\\\u'; restore < index; ++restore) {\n                            str += source[restore];\n                        }\n                    } else {\n                        index = restore;\n                        flags += 'u';\n                        str += '\\\\u';\n                    }\n                    tolerateUnexpectedToken();\n                } else {\n                    str += '\\\\';\n                    tolerateUnexpectedToken();\n                }\n            } else {\n                flags += ch;\n                str += ch;\n            }\n        }\n\n        return {\n            value: flags,\n            literal: str\n        };\n    }\n\n    function scanRegExp() {\n        var start, body, flags, value;\n        scanning = true;\n\n        lookahead = null;\n        skipComment();\n        start = index;\n\n        body = scanRegExpBody();\n        flags = scanRegExpFlags();\n        value = testRegExp(body.value, flags.value);\n        scanning = false;\n        if (extra.tokenize) {\n            return {\n                type: Token.RegularExpression,\n                value: value,\n                regex: {\n                    pattern: body.value,\n                    flags: flags.value\n                },\n                lineNumber: lineNumber,\n                lineStart: lineStart,\n                start: start,\n                end: index\n            };\n        }\n\n        return {\n            literal: body.literal + flags.literal,\n            value: value,\n            regex: {\n                pattern: body.value,\n                flags: flags.value\n            },\n            start: start,\n            end: index\n        };\n    }\n\n    function collectRegex() {\n        var pos, loc, regex, token;\n\n        skipComment();\n\n        pos = index;\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart\n            }\n        };\n\n        regex = scanRegExp();\n\n        loc.end = {\n            line: lineNumber,\n            column: index - lineStart\n        };\n\n        /* istanbul ignore next */\n        if (!extra.tokenize) {\n            // Pop the previous token, which is likely '/' or '/='\n            if (extra.tokens.length > 0) {\n                token = extra.tokens[extra.tokens.length - 1];\n                if (token.range[0] === pos && token.type === 'Punctuator') {\n                    if (token.value === '/' || token.value === '/=') {\n                        extra.tokens.pop();\n                    }\n                }\n            }\n\n            extra.tokens.push({\n                type: 'RegularExpression',\n                value: regex.literal,\n                regex: regex.regex,\n                range: [pos, index],\n                loc: loc\n            });\n        }\n\n        return regex;\n    }\n\n    function isIdentifierName(token) {\n        return token.type === Token.Identifier ||\n            token.type === Token.Keyword ||\n            token.type === Token.BooleanLiteral ||\n            token.type === Token.NullLiteral;\n    }\n\n    // Using the following algorithm:\n    // https://github.com/mozilla/sweet.js/wiki/design\n\n    function advanceSlash() {\n        var regex, previous, check;\n\n        function testKeyword(value) {\n            return value && (value.length > 1) && (value[0] >= 'a') && (value[0] <= 'z');\n        }\n\n        previous = extra.tokenValues[extra.tokens.length - 1];\n        regex = (previous !== null);\n\n        switch (previous) {\n        case 'this':\n        case ']':\n            regex = false;\n            break;\n\n        case ')':\n            check = extra.tokenValues[extra.openParenToken - 1];\n            regex = (check === 'if' || check === 'while' || check === 'for' || check === 'with');\n            break;\n\n        case '}':\n            // Dividing a function by anything makes little sense,\n            // but we have to check for that.\n            regex = false;\n            if (testKeyword(extra.tokenValues[extra.openCurlyToken - 3])) {\n                // Anonymous function, e.g. function(){} /42\n                check = extra.tokenValues[extra.openCurlyToken - 4];\n                regex = check ? (FnExprTokens.indexOf(check) < 0) : false;\n            } else if (testKeyword(extra.tokenValues[extra.openCurlyToken - 4])) {\n                // Named function, e.g. function f(){} /42/\n                check = extra.tokenValues[extra.openCurlyToken - 5];\n                regex = check ? (FnExprTokens.indexOf(check) < 0) : true;\n            }\n        }\n\n        return regex ? collectRegex() : scanPunctuator();\n    }\n\n    function advance() {\n        var cp, token;\n\n        if (index >= length) {\n            return {\n                type: Token.EOF,\n                lineNumber: lineNumber,\n                lineStart: lineStart,\n                start: index,\n                end: index\n            };\n        }\n\n        cp = source.charCodeAt(index);\n\n        if (isIdentifierStart(cp)) {\n            token = scanIdentifier();\n            if (strict && isStrictModeReservedWord(token.value)) {\n                token.type = Token.Keyword;\n            }\n            return token;\n        }\n\n        // Very common: ( and ) and ;\n        if (cp === 0x28 || cp === 0x29 || cp === 0x3B) {\n            return scanPunctuator();\n        }\n\n        // String literal starts with single quote (U+0027) or double quote (U+0022).\n        if (cp === 0x27 || cp === 0x22) {\n            return scanStringLiteral();\n        }\n\n        // Dot (.) U+002E can also start a floating-point number, hence the need\n        // to check the next character.\n        if (cp === 0x2E) {\n            if (isDecimalDigit(source.charCodeAt(index + 1))) {\n                return scanNumericLiteral();\n            }\n            return scanPunctuator();\n        }\n\n        if (isDecimalDigit(cp)) {\n            return scanNumericLiteral();\n        }\n\n        // Slash (/) U+002F can also start a regex.\n        if (extra.tokenize && cp === 0x2F) {\n            return advanceSlash();\n        }\n\n        // Template literals start with ` (U+0060) for template head\n        // or } (U+007D) for template middle or template tail.\n        if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) {\n            return scanTemplate();\n        }\n\n        // Possible identifier start in a surrogate pair.\n        if (cp >= 0xD800 && cp < 0xDFFF) {\n            cp = codePointAt(index);\n            if (isIdentifierStart(cp)) {\n                return scanIdentifier();\n            }\n        }\n\n        return scanPunctuator();\n    }\n\n    function collectToken() {\n        var loc, token, value, entry;\n\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart\n            }\n        };\n\n        token = advance();\n        loc.end = {\n            line: lineNumber,\n            column: index - lineStart\n        };\n\n        if (token.type !== Token.EOF) {\n            value = source.slice(token.start, token.end);\n            entry = {\n                type: TokenName[token.type],\n                value: value,\n                range: [token.start, token.end],\n                loc: loc\n            };\n            if (token.regex) {\n                entry.regex = {\n                    pattern: token.regex.pattern,\n                    flags: token.regex.flags\n                };\n            }\n            if (extra.tokenValues) {\n                extra.tokenValues.push((entry.type === 'Punctuator' || entry.type === 'Keyword') ? entry.value : null);\n            }\n            if (extra.tokenize) {\n                if (!extra.range) {\n                    delete entry.range;\n                }\n                if (!extra.loc) {\n                    delete entry.loc;\n                }\n                if (extra.delegate) {\n                    entry = extra.delegate(entry);\n                }\n            }\n            extra.tokens.push(entry);\n        }\n\n        return token;\n    }\n\n    function lex() {\n        var token;\n        scanning = true;\n\n        lastIndex = index;\n        lastLineNumber = lineNumber;\n        lastLineStart = lineStart;\n\n        skipComment();\n\n        token = lookahead;\n\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n\n        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();\n        scanning = false;\n        return token;\n    }\n\n    function peek() {\n        scanning = true;\n\n        skipComment();\n\n        lastIndex = index;\n        lastLineNumber = lineNumber;\n        lastLineStart = lineStart;\n\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n\n        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();\n        scanning = false;\n    }\n\n    function Position() {\n        this.line = startLineNumber;\n        this.column = startIndex - startLineStart;\n    }\n\n    function SourceLocation() {\n        this.start = new Position();\n        this.end = null;\n    }\n\n    function WrappingSourceLocation(startToken) {\n        this.start = {\n            line: startToken.lineNumber,\n            column: startToken.start - startToken.lineStart\n        };\n        this.end = null;\n    }\n\n    function Node() {\n        if (extra.range) {\n            this.range = [startIndex, 0];\n        }\n        if (extra.loc) {\n            this.loc = new SourceLocation();\n        }\n    }\n\n    function WrappingNode(startToken) {\n        if (extra.range) {\n            this.range = [startToken.start, 0];\n        }\n        if (extra.loc) {\n            this.loc = new WrappingSourceLocation(startToken);\n        }\n    }\n\n    WrappingNode.prototype = Node.prototype = {\n\n        processComment: function () {\n            var lastChild,\n                innerComments,\n                leadingComments,\n                trailingComments,\n                bottomRight = extra.bottomRightStack,\n                i,\n                comment,\n                last = bottomRight[bottomRight.length - 1];\n\n            if (this.type === Syntax.Program) {\n                if (this.body.length > 0) {\n                    return;\n                }\n            }\n            /**\n             * patch innnerComments for properties empty block\n             * `function a() {/** comments **\\/}`\n             */\n\n            if (this.type === Syntax.BlockStatement && this.body.length === 0) {\n                innerComments = [];\n                for (i = extra.leadingComments.length - 1; i >= 0; --i) {\n                    comment = extra.leadingComments[i];\n                    if (this.range[1] >= comment.range[1]) {\n                        innerComments.unshift(comment);\n                        extra.leadingComments.splice(i, 1);\n                        extra.trailingComments.splice(i, 1);\n                    }\n                }\n                if (innerComments.length) {\n                    this.innerComments = innerComments;\n                    //bottomRight.push(this);\n                    return;\n                }\n            }\n\n            if (extra.trailingComments.length > 0) {\n                trailingComments = [];\n                for (i = extra.trailingComments.length - 1; i >= 0; --i) {\n                    comment = extra.trailingComments[i];\n                    if (comment.range[0] >= this.range[1]) {\n                        trailingComments.unshift(comment);\n                        extra.trailingComments.splice(i, 1);\n                    }\n                }\n                extra.trailingComments = [];\n            } else {\n                if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) {\n                    trailingComments = last.trailingComments;\n                    delete last.trailingComments;\n                }\n            }\n\n            // Eating the stack.\n            while (last && last.range[0] >= this.range[0]) {\n                lastChild = bottomRight.pop();\n                last = bottomRight[bottomRight.length - 1];\n            }\n\n            if (lastChild) {\n                if (lastChild.leadingComments) {\n                    leadingComments = [];\n                    for (i = lastChild.leadingComments.length - 1; i >= 0; --i) {\n                        comment = lastChild.leadingComments[i];\n                        if (comment.range[1] <= this.range[0]) {\n                            leadingComments.unshift(comment);\n                            lastChild.leadingComments.splice(i, 1);\n                        }\n                    }\n\n                    if (!lastChild.leadingComments.length) {\n                        lastChild.leadingComments = undefined;\n                    }\n                }\n            } else if (extra.leadingComments.length > 0) {\n                leadingComments = [];\n                for (i = extra.leadingComments.length - 1; i >= 0; --i) {\n                    comment = extra.leadingComments[i];\n                    if (comment.range[1] <= this.range[0]) {\n                        leadingComments.unshift(comment);\n                        extra.leadingComments.splice(i, 1);\n                    }\n                }\n            }\n\n\n            if (leadingComments && leadingComments.length > 0) {\n                this.leadingComments = leadingComments;\n            }\n            if (trailingComments && trailingComments.length > 0) {\n                this.trailingComments = trailingComments;\n            }\n\n            bottomRight.push(this);\n        },\n\n        finish: function () {\n            if (extra.range) {\n                this.range[1] = lastIndex;\n            }\n            if (extra.loc) {\n                this.loc.end = {\n                    line: lastLineNumber,\n                    column: lastIndex - lastLineStart\n                };\n                if (extra.source) {\n                    this.loc.source = extra.source;\n                }\n            }\n\n            if (extra.attachComment) {\n                this.processComment();\n            }\n        },\n\n        finishArrayExpression: function (elements) {\n            this.type = Syntax.ArrayExpression;\n            this.elements = elements;\n            this.finish();\n            return this;\n        },\n\n        finishArrayPattern: function (elements) {\n            this.type = Syntax.ArrayPattern;\n            this.elements = elements;\n            this.finish();\n            return this;\n        },\n\n        finishArrowFunctionExpression: function (params, defaults, body, expression) {\n            this.type = Syntax.ArrowFunctionExpression;\n            this.id = null;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = false;\n            this.expression = expression;\n            this.finish();\n            return this;\n        },\n\n        finishAssignmentExpression: function (operator, left, right) {\n            this.type = Syntax.AssignmentExpression;\n            this.operator = operator;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishAssignmentPattern: function (left, right) {\n            this.type = Syntax.AssignmentPattern;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishBinaryExpression: function (operator, left, right) {\n            this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression;\n            this.operator = operator;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishBlockStatement: function (body) {\n            this.type = Syntax.BlockStatement;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishBreakStatement: function (label) {\n            this.type = Syntax.BreakStatement;\n            this.label = label;\n            this.finish();\n            return this;\n        },\n\n        finishCallExpression: function (callee, args) {\n            this.type = Syntax.CallExpression;\n            this.callee = callee;\n            this.arguments = args;\n            this.finish();\n            return this;\n        },\n\n        finishCatchClause: function (param, body) {\n            this.type = Syntax.CatchClause;\n            this.param = param;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassBody: function (body) {\n            this.type = Syntax.ClassBody;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassDeclaration: function (id, superClass, body) {\n            this.type = Syntax.ClassDeclaration;\n            this.id = id;\n            this.superClass = superClass;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassExpression: function (id, superClass, body) {\n            this.type = Syntax.ClassExpression;\n            this.id = id;\n            this.superClass = superClass;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishConditionalExpression: function (test, consequent, alternate) {\n            this.type = Syntax.ConditionalExpression;\n            this.test = test;\n            this.consequent = consequent;\n            this.alternate = alternate;\n            this.finish();\n            return this;\n        },\n\n        finishContinueStatement: function (label) {\n            this.type = Syntax.ContinueStatement;\n            this.label = label;\n            this.finish();\n            return this;\n        },\n\n        finishDebuggerStatement: function () {\n            this.type = Syntax.DebuggerStatement;\n            this.finish();\n            return this;\n        },\n\n        finishDoWhileStatement: function (body, test) {\n            this.type = Syntax.DoWhileStatement;\n            this.body = body;\n            this.test = test;\n            this.finish();\n            return this;\n        },\n\n        finishEmptyStatement: function () {\n            this.type = Syntax.EmptyStatement;\n            this.finish();\n            return this;\n        },\n\n        finishExpressionStatement: function (expression) {\n            this.type = Syntax.ExpressionStatement;\n            this.expression = expression;\n            this.finish();\n            return this;\n        },\n\n        finishForStatement: function (init, test, update, body) {\n            this.type = Syntax.ForStatement;\n            this.init = init;\n            this.test = test;\n            this.update = update;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishForOfStatement: function (left, right, body) {\n            this.type = Syntax.ForOfStatement;\n            this.left = left;\n            this.right = right;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishForInStatement: function (left, right, body) {\n            this.type = Syntax.ForInStatement;\n            this.left = left;\n            this.right = right;\n            this.body = body;\n            this.each = false;\n            this.finish();\n            return this;\n        },\n\n        finishFunctionDeclaration: function (id, params, defaults, body, generator) {\n            this.type = Syntax.FunctionDeclaration;\n            this.id = id;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = generator;\n            this.expression = false;\n            this.finish();\n            return this;\n        },\n\n        finishFunctionExpression: function (id, params, defaults, body, generator) {\n            this.type = Syntax.FunctionExpression;\n            this.id = id;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = generator;\n            this.expression = false;\n            this.finish();\n            return this;\n        },\n\n        finishIdentifier: function (name) {\n            this.type = Syntax.Identifier;\n            this.name = name;\n            this.finish();\n            return this;\n        },\n\n        finishIfStatement: function (test, consequent, alternate) {\n            this.type = Syntax.IfStatement;\n            this.test = test;\n            this.consequent = consequent;\n            this.alternate = alternate;\n            this.finish();\n            return this;\n        },\n\n        finishLabeledStatement: function (label, body) {\n            this.type = Syntax.LabeledStatement;\n            this.label = label;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishLiteral: function (token) {\n            this.type = Syntax.Literal;\n            this.value = token.value;\n            this.raw = source.slice(token.start, token.end);\n            if (token.regex) {\n                this.regex = token.regex;\n            }\n            this.finish();\n            return this;\n        },\n\n        finishMemberExpression: function (accessor, object, property) {\n            this.type = Syntax.MemberExpression;\n            this.computed = accessor === '[';\n            this.object = object;\n            this.property = property;\n            this.finish();\n            return this;\n        },\n\n        finishMetaProperty: function (meta, property) {\n            this.type = Syntax.MetaProperty;\n            this.meta = meta;\n            this.property = property;\n            this.finish();\n            return this;\n        },\n\n        finishNewExpression: function (callee, args) {\n            this.type = Syntax.NewExpression;\n            this.callee = callee;\n            this.arguments = args;\n            this.finish();\n            return this;\n        },\n\n        finishObjectExpression: function (properties) {\n            this.type = Syntax.ObjectExpression;\n            this.properties = properties;\n            this.finish();\n            return this;\n        },\n\n        finishObjectPattern: function (properties) {\n            this.type = Syntax.ObjectPattern;\n            this.properties = properties;\n            this.finish();\n            return this;\n        },\n\n        finishPostfixExpression: function (operator, argument) {\n            this.type = Syntax.UpdateExpression;\n            this.operator = operator;\n            this.argument = argument;\n            this.prefix = false;\n            this.finish();\n            return this;\n        },\n\n        finishProgram: function (body, sourceType) {\n            this.type = Syntax.Program;\n            this.body = body;\n            this.sourceType = sourceType;\n            this.finish();\n            return this;\n        },\n\n        finishProperty: function (kind, key, computed, value, method, shorthand) {\n            this.type = Syntax.Property;\n            this.key = key;\n            this.computed = computed;\n            this.value = value;\n            this.kind = kind;\n            this.method = method;\n            this.shorthand = shorthand;\n            this.finish();\n            return this;\n        },\n\n        finishRestElement: function (argument) {\n            this.type = Syntax.RestElement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishReturnStatement: function (argument) {\n            this.type = Syntax.ReturnStatement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishSequenceExpression: function (expressions) {\n            this.type = Syntax.SequenceExpression;\n            this.expressions = expressions;\n            this.finish();\n            return this;\n        },\n\n        finishSpreadElement: function (argument) {\n            this.type = Syntax.SpreadElement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishSwitchCase: function (test, consequent) {\n            this.type = Syntax.SwitchCase;\n            this.test = test;\n            this.consequent = consequent;\n            this.finish();\n            return this;\n        },\n\n        finishSuper: function () {\n            this.type = Syntax.Super;\n            this.finish();\n            return this;\n        },\n\n        finishSwitchStatement: function (discriminant, cases) {\n            this.type = Syntax.SwitchStatement;\n            this.discriminant = discriminant;\n            this.cases = cases;\n            this.finish();\n            return this;\n        },\n\n        finishTaggedTemplateExpression: function (tag, quasi) {\n            this.type = Syntax.TaggedTemplateExpression;\n            this.tag = tag;\n            this.quasi = quasi;\n            this.finish();\n            return this;\n        },\n\n        finishTemplateElement: function (value, tail) {\n            this.type = Syntax.TemplateElement;\n            this.value = value;\n            this.tail = tail;\n            this.finish();\n            return this;\n        },\n\n        finishTemplateLiteral: function (quasis, expressions) {\n            this.type = Syntax.TemplateLiteral;\n            this.quasis = quasis;\n            this.expressions = expressions;\n            this.finish();\n            return this;\n        },\n\n        finishThisExpression: function () {\n            this.type = Syntax.ThisExpression;\n            this.finish();\n            return this;\n        },\n\n        finishThrowStatement: function (argument) {\n            this.type = Syntax.ThrowStatement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishTryStatement: function (block, handler, finalizer) {\n            this.type = Syntax.TryStatement;\n            this.block = block;\n            this.guardedHandlers = [];\n            this.handlers = handler ? [handler] : [];\n            this.handler = handler;\n            this.finalizer = finalizer;\n            this.finish();\n            return this;\n        },\n\n        finishUnaryExpression: function (operator, argument) {\n            this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression;\n            this.operator = operator;\n            this.argument = argument;\n            this.prefix = true;\n            this.finish();\n            return this;\n        },\n\n        finishVariableDeclaration: function (declarations) {\n            this.type = Syntax.VariableDeclaration;\n            this.declarations = declarations;\n            this.kind = 'var';\n            this.finish();\n            return this;\n        },\n\n        finishLexicalDeclaration: function (declarations, kind) {\n            this.type = Syntax.VariableDeclaration;\n            this.declarations = declarations;\n            this.kind = kind;\n            this.finish();\n            return this;\n        },\n\n        finishVariableDeclarator: function (id, init) {\n            this.type = Syntax.VariableDeclarator;\n            this.id = id;\n            this.init = init;\n            this.finish();\n            return this;\n        },\n\n        finishWhileStatement: function (test, body) {\n            this.type = Syntax.WhileStatement;\n            this.test = test;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishWithStatement: function (object, body) {\n            this.type = Syntax.WithStatement;\n            this.object = object;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishExportSpecifier: function (local, exported) {\n            this.type = Syntax.ExportSpecifier;\n            this.exported = exported || local;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishImportDefaultSpecifier: function (local) {\n            this.type = Syntax.ImportDefaultSpecifier;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishImportNamespaceSpecifier: function (local) {\n            this.type = Syntax.ImportNamespaceSpecifier;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishExportNamedDeclaration: function (declaration, specifiers, src) {\n            this.type = Syntax.ExportNamedDeclaration;\n            this.declaration = declaration;\n            this.specifiers = specifiers;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishExportDefaultDeclaration: function (declaration) {\n            this.type = Syntax.ExportDefaultDeclaration;\n            this.declaration = declaration;\n            this.finish();\n            return this;\n        },\n\n        finishExportAllDeclaration: function (src) {\n            this.type = Syntax.ExportAllDeclaration;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishImportSpecifier: function (local, imported) {\n            this.type = Syntax.ImportSpecifier;\n            this.local = local || imported;\n            this.imported = imported;\n            this.finish();\n            return this;\n        },\n\n        finishImportDeclaration: function (specifiers, src) {\n            this.type = Syntax.ImportDeclaration;\n            this.specifiers = specifiers;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishYieldExpression: function (argument, delegate) {\n            this.type = Syntax.YieldExpression;\n            this.argument = argument;\n            this.delegate = delegate;\n            this.finish();\n            return this;\n        }\n    };\n\n\n    function recordError(error) {\n        var e, existing;\n\n        for (e = 0; e < extra.errors.length; e++) {\n            existing = extra.errors[e];\n            // Prevent duplicated error.\n            /* istanbul ignore next */\n            if (existing.index === error.index && existing.message === error.message) {\n                return;\n            }\n        }\n\n        extra.errors.push(error);\n    }\n\n    function constructError(msg, column) {\n        var error = new Error(msg);\n        try {\n            throw error;\n        } catch (base) {\n            /* istanbul ignore else */\n            if (Object.create && Object.defineProperty) {\n                error = Object.create(base);\n                Object.defineProperty(error, 'column', { value: column });\n            }\n        } finally {\n            return error;\n        }\n    }\n\n    function createError(line, pos, description) {\n        var msg, column, error;\n\n        msg = 'Line ' + line + ': ' + description;\n        column = pos - (scanning ? lineStart : lastLineStart) + 1;\n        error = constructError(msg, column);\n        error.lineNumber = line;\n        error.description = description;\n        error.index = pos;\n        return error;\n    }\n\n    // Throw an exception\n\n    function throwError(messageFormat) {\n        var args, msg;\n\n        args = Array.prototype.slice.call(arguments, 1);\n        msg = messageFormat.replace(/%(\\d)/g,\n            function (whole, idx) {\n                assert(idx < args.length, 'Message reference must be in range');\n                return args[idx];\n            }\n        );\n\n        throw createError(lastLineNumber, lastIndex, msg);\n    }\n\n    function tolerateError(messageFormat) {\n        var args, msg, error;\n\n        args = Array.prototype.slice.call(arguments, 1);\n        /* istanbul ignore next */\n        msg = messageFormat.replace(/%(\\d)/g,\n            function (whole, idx) {\n                assert(idx < args.length, 'Message reference must be in range');\n                return args[idx];\n            }\n        );\n\n        error = createError(lineNumber, lastIndex, msg);\n        if (extra.errors) {\n            recordError(error);\n        } else {\n            throw error;\n        }\n    }\n\n    // Throw an exception because of the token.\n\n    function unexpectedTokenError(token, message) {\n        var value, msg = message || Messages.UnexpectedToken;\n\n        if (token) {\n            if (!message) {\n                msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS :\n                    (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier :\n                    (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber :\n                    (token.type === Token.StringLiteral) ? Messages.UnexpectedString :\n                    (token.type === Token.Template) ? Messages.UnexpectedTemplate :\n                    Messages.UnexpectedToken;\n\n                if (token.type === Token.Keyword) {\n                    if (isFutureReservedWord(token.value)) {\n                        msg = Messages.UnexpectedReserved;\n                    } else if (strict && isStrictModeReservedWord(token.value)) {\n                        msg = Messages.StrictReservedWord;\n                    }\n                }\n            }\n\n            value = (token.type === Token.Template) ? token.value.raw : token.value;\n        } else {\n            value = 'ILLEGAL';\n        }\n\n        msg = msg.replace('%0', value);\n\n        return (token && typeof token.lineNumber === 'number') ?\n            createError(token.lineNumber, token.start, msg) :\n            createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg);\n    }\n\n    function throwUnexpectedToken(token, message) {\n        throw unexpectedTokenError(token, message);\n    }\n\n    function tolerateUnexpectedToken(token, message) {\n        var error = unexpectedTokenError(token, message);\n        if (extra.errors) {\n            recordError(error);\n        } else {\n            throw error;\n        }\n    }\n\n    // Expect the next token to match the specified punctuator.\n    // If not, an exception will be thrown.\n\n    function expect(value) {\n        var token = lex();\n        if (token.type !== Token.Punctuator || token.value !== value) {\n            throwUnexpectedToken(token);\n        }\n    }\n\n    /**\n     * @name expectCommaSeparator\n     * @description Quietly expect a comma when in tolerant mode, otherwise delegates\n     * to <code>expect(value)</code>\n     * @since 2.0\n     */\n    function expectCommaSeparator() {\n        var token;\n\n        if (extra.errors) {\n            token = lookahead;\n            if (token.type === Token.Punctuator && token.value === ',') {\n                lex();\n            } else if (token.type === Token.Punctuator && token.value === ';') {\n                lex();\n                tolerateUnexpectedToken(token);\n            } else {\n                tolerateUnexpectedToken(token, Messages.UnexpectedToken);\n            }\n        } else {\n            expect(',');\n        }\n    }\n\n    // Expect the next token to match the specified keyword.\n    // If not, an exception will be thrown.\n\n    function expectKeyword(keyword) {\n        var token = lex();\n        if (token.type !== Token.Keyword || token.value !== keyword) {\n            throwUnexpectedToken(token);\n        }\n    }\n\n    // Return true if the next token matches the specified punctuator.\n\n    function match(value) {\n        return lookahead.type === Token.Punctuator && lookahead.value === value;\n    }\n\n    // Return true if the next token matches the specified keyword\n\n    function matchKeyword(keyword) {\n        return lookahead.type === Token.Keyword && lookahead.value === keyword;\n    }\n\n    // Return true if the next token matches the specified contextual keyword\n    // (where an identifier is sometimes a keyword depending on the context)\n\n    function matchContextualKeyword(keyword) {\n        return lookahead.type === Token.Identifier && lookahead.value === keyword;\n    }\n\n    // Return true if the next token is an assignment operator\n\n    function matchAssign() {\n        var op;\n\n        if (lookahead.type !== Token.Punctuator) {\n            return false;\n        }\n        op = lookahead.value;\n        return op === '=' ||\n            op === '*=' ||\n            op === '/=' ||\n            op === '%=' ||\n            op === '+=' ||\n            op === '-=' ||\n            op === '<<=' ||\n            op === '>>=' ||\n            op === '>>>=' ||\n            op === '&=' ||\n            op === '^=' ||\n            op === '|=';\n    }\n\n    function consumeSemicolon() {\n        // Catch the very common case first: immediately a semicolon (U+003B).\n        if (source.charCodeAt(startIndex) === 0x3B || match(';')) {\n            lex();\n            return;\n        }\n\n        if (hasLineTerminator) {\n            return;\n        }\n\n        // FIXME(ikarienator): this is seemingly an issue in the previous location info convention.\n        lastIndex = startIndex;\n        lastLineNumber = startLineNumber;\n        lastLineStart = startLineStart;\n\n        if (lookahead.type !== Token.EOF && !match('}')) {\n            throwUnexpectedToken(lookahead);\n        }\n    }\n\n    // Cover grammar support.\n    //\n    // When an assignment expression position starts with an left parenthesis, the determination of the type\n    // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead)\n    // or the first comma. This situation also defers the determination of all the expressions nested in the pair.\n    //\n    // There are three productions that can be parsed in a parentheses pair that needs to be determined\n    // after the outermost pair is closed. They are:\n    //\n    //   1. AssignmentExpression\n    //   2. BindingElements\n    //   3. AssignmentTargets\n    //\n    // In order to avoid exponential backtracking, we use two flags to denote if the production can be\n    // binding element or assignment target.\n    //\n    // The three productions have the relationship:\n    //\n    //   BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression\n    //\n    // with a single exception that CoverInitializedName when used directly in an Expression, generates\n    // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the\n    // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair.\n    //\n    // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not\n    // effect the current flags. This means the production the parser parses is only used as an expression. Therefore\n    // the CoverInitializedName check is conducted.\n    //\n    // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates\n    // the flags outside of the parser. This means the production the parser parses is used as a part of a potential\n    // pattern. The CoverInitializedName check is deferred.\n    function isolateCoverGrammar(parser) {\n        var oldIsBindingElement = isBindingElement,\n            oldIsAssignmentTarget = isAssignmentTarget,\n            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,\n            result;\n        isBindingElement = true;\n        isAssignmentTarget = true;\n        firstCoverInitializedNameError = null;\n        result = parser();\n        if (firstCoverInitializedNameError !== null) {\n            throwUnexpectedToken(firstCoverInitializedNameError);\n        }\n        isBindingElement = oldIsBindingElement;\n        isAssignmentTarget = oldIsAssignmentTarget;\n        firstCoverInitializedNameError = oldFirstCoverInitializedNameError;\n        return result;\n    }\n\n    function inheritCoverGrammar(parser) {\n        var oldIsBindingElement = isBindingElement,\n            oldIsAssignmentTarget = isAssignmentTarget,\n            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,\n            result;\n        isBindingElement = true;\n        isAssignmentTarget = true;\n        firstCoverInitializedNameError = null;\n        result = parser();\n        isBindingElement = isBindingElement && oldIsBindingElement;\n        isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget;\n        firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError;\n        return result;\n    }\n\n    // ECMA-262 13.3.3 Destructuring Binding Patterns\n\n    function parseArrayPattern(params, kind) {\n        var node = new Node(), elements = [], rest, restNode;\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else {\n                if (match('...')) {\n                    restNode = new Node();\n                    lex();\n                    params.push(lookahead);\n                    rest = parseVariableIdentifier(kind);\n                    elements.push(restNode.finishRestElement(rest));\n                    break;\n                } else {\n                    elements.push(parsePatternWithDefault(params, kind));\n                }\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n\n        }\n\n        expect(']');\n\n        return node.finishArrayPattern(elements);\n    }\n\n    function parsePropertyPattern(params, kind) {\n        var node = new Node(), key, keyToken, computed = match('['), init;\n        if (lookahead.type === Token.Identifier) {\n            keyToken = lookahead;\n            key = parseVariableIdentifier();\n            if (match('=')) {\n                params.push(keyToken);\n                lex();\n                init = parseAssignmentExpression();\n\n                return node.finishProperty(\n                    'init', key, false,\n                    new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, false);\n            } else if (!match(':')) {\n                params.push(keyToken);\n                return node.finishProperty('init', key, false, key, false, true);\n            }\n        } else {\n            key = parseObjectPropertyKey();\n        }\n        expect(':');\n        init = parsePatternWithDefault(params, kind);\n        return node.finishProperty('init', key, computed, init, false, false);\n    }\n\n    function parseObjectPattern(params, kind) {\n        var node = new Node(), properties = [];\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parsePropertyPattern(params, kind));\n            if (!match('}')) {\n                expect(',');\n            }\n        }\n\n        lex();\n\n        return node.finishObjectPattern(properties);\n    }\n\n    function parsePattern(params, kind) {\n        if (match('[')) {\n            return parseArrayPattern(params, kind);\n        } else if (match('{')) {\n            return parseObjectPattern(params, kind);\n        } else if (matchKeyword('let')) {\n            if (kind === 'const' || kind === 'let') {\n                tolerateUnexpectedToken(lookahead, Messages.UnexpectedToken);\n            }\n        }\n\n        params.push(lookahead);\n        return parseVariableIdentifier(kind);\n    }\n\n    function parsePatternWithDefault(params, kind) {\n        var startToken = lookahead, pattern, previousAllowYield, right;\n        pattern = parsePattern(params, kind);\n        if (match('=')) {\n            lex();\n            previousAllowYield = state.allowYield;\n            state.allowYield = true;\n            right = isolateCoverGrammar(parseAssignmentExpression);\n            state.allowYield = previousAllowYield;\n            pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right);\n        }\n        return pattern;\n    }\n\n    // ECMA-262 12.2.5 Array Initializer\n\n    function parseArrayInitializer() {\n        var elements = [], node = new Node(), restSpread;\n\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else if (match('...')) {\n                restSpread = new Node();\n                lex();\n                restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression));\n\n                if (!match(']')) {\n                    isAssignmentTarget = isBindingElement = false;\n                    expect(',');\n                }\n                elements.push(restSpread);\n            } else {\n                elements.push(inheritCoverGrammar(parseAssignmentExpression));\n\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n        }\n\n        lex();\n\n        return node.finishArrayExpression(elements);\n    }\n\n    // ECMA-262 12.2.6 Object Initializer\n\n    function parsePropertyFunction(node, paramInfo, isGenerator) {\n        var previousStrict, body;\n\n        isAssignmentTarget = isBindingElement = false;\n\n        previousStrict = strict;\n        body = isolateCoverGrammar(parseFunctionSourceElements);\n\n        if (strict && paramInfo.firstRestricted) {\n            tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message);\n        }\n        if (strict && paramInfo.stricted) {\n            tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message);\n        }\n\n        strict = previousStrict;\n        return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator);\n    }\n\n    function parsePropertyMethodFunction() {\n        var params, method, node = new Node(),\n            previousAllowYield = state.allowYield;\n\n        state.allowYield = false;\n        params = parseParams();\n        state.allowYield = previousAllowYield;\n\n        state.allowYield = false;\n        method = parsePropertyFunction(node, params, false);\n        state.allowYield = previousAllowYield;\n\n        return method;\n    }\n\n    function parseObjectPropertyKey() {\n        var token, node = new Node(), expr;\n\n        token = lex();\n\n        // Note: This function is called only from parseObjectProperty(), where\n        // EOF and Punctuator tokens are already filtered out.\n\n        switch (token.type) {\n        case Token.StringLiteral:\n        case Token.NumericLiteral:\n            if (strict && token.octal) {\n                tolerateUnexpectedToken(token, Messages.StrictOctalLiteral);\n            }\n            return node.finishLiteral(token);\n        case Token.Identifier:\n        case Token.BooleanLiteral:\n        case Token.NullLiteral:\n        case Token.Keyword:\n            return node.finishIdentifier(token.value);\n        case Token.Punctuator:\n            if (token.value === '[') {\n                expr = isolateCoverGrammar(parseAssignmentExpression);\n                expect(']');\n                return expr;\n            }\n            break;\n        }\n        throwUnexpectedToken(token);\n    }\n\n    function lookaheadPropertyName() {\n        switch (lookahead.type) {\n        case Token.Identifier:\n        case Token.StringLiteral:\n        case Token.BooleanLiteral:\n        case Token.NullLiteral:\n        case Token.NumericLiteral:\n        case Token.Keyword:\n            return true;\n        case Token.Punctuator:\n            return lookahead.value === '[';\n        }\n        return false;\n    }\n\n    // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals,\n    // it might be called at a position where there is in fact a short hand identifier pattern or a data property.\n    // This can only be determined after we consumed up to the left parentheses.\n    //\n    // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller\n    // is responsible to visit other options.\n    function tryParseMethodDefinition(token, key, computed, node) {\n        var value, options, methodNode, params,\n            previousAllowYield = state.allowYield;\n\n        if (token.type === Token.Identifier) {\n            // check for `get` and `set`;\n\n            if (token.value === 'get' && lookaheadPropertyName()) {\n                computed = match('[');\n                key = parseObjectPropertyKey();\n                methodNode = new Node();\n                expect('(');\n                expect(')');\n\n                state.allowYield = false;\n                value = parsePropertyFunction(methodNode, {\n                    params: [],\n                    defaults: [],\n                    stricted: null,\n                    firstRestricted: null,\n                    message: null\n                }, false);\n                state.allowYield = previousAllowYield;\n\n                return node.finishProperty('get', key, computed, value, false, false);\n            } else if (token.value === 'set' && lookaheadPropertyName()) {\n                computed = match('[');\n                key = parseObjectPropertyKey();\n                methodNode = new Node();\n                expect('(');\n\n                options = {\n                    params: [],\n                    defaultCount: 0,\n                    defaults: [],\n                    firstRestricted: null,\n                    paramSet: {}\n                };\n                if (match(')')) {\n                    tolerateUnexpectedToken(lookahead);\n                } else {\n                    state.allowYield = false;\n                    parseParam(options);\n                    state.allowYield = previousAllowYield;\n                    if (options.defaultCount === 0) {\n                        options.defaults = [];\n                    }\n                }\n                expect(')');\n\n                state.allowYield = false;\n                value = parsePropertyFunction(methodNode, options, false);\n                state.allowYield = previousAllowYield;\n\n                return node.finishProperty('set', key, computed, value, false, false);\n            }\n        } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) {\n            computed = match('[');\n            key = parseObjectPropertyKey();\n            methodNode = new Node();\n\n            state.allowYield = true;\n            params = parseParams();\n            state.allowYield = previousAllowYield;\n\n            state.allowYield = false;\n            value = parsePropertyFunction(methodNode, params, true);\n            state.allowYield = previousAllowYield;\n\n            return node.finishProperty('init', key, computed, value, true, false);\n        }\n\n        if (key && match('(')) {\n            value = parsePropertyMethodFunction();\n            return node.finishProperty('init', key, computed, value, true, false);\n        }\n\n        // Not a MethodDefinition.\n        return null;\n    }\n\n    function parseObjectProperty(hasProto) {\n        var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value;\n\n        computed = match('[');\n        if (match('*')) {\n            lex();\n        } else {\n            key = parseObjectPropertyKey();\n        }\n        maybeMethod = tryParseMethodDefinition(token, key, computed, node);\n        if (maybeMethod) {\n            return maybeMethod;\n        }\n\n        if (!key) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        // Check for duplicated __proto__\n        if (!computed) {\n            proto = (key.type === Syntax.Identifier && key.name === '__proto__') ||\n                (key.type === Syntax.Literal && key.value === '__proto__');\n            if (hasProto.value && proto) {\n                tolerateError(Messages.DuplicateProtoProperty);\n            }\n            hasProto.value |= proto;\n        }\n\n        if (match(':')) {\n            lex();\n            value = inheritCoverGrammar(parseAssignmentExpression);\n            return node.finishProperty('init', key, computed, value, false, false);\n        }\n\n        if (token.type === Token.Identifier) {\n            if (match('=')) {\n                firstCoverInitializedNameError = lookahead;\n                lex();\n                value = isolateCoverGrammar(parseAssignmentExpression);\n                return node.finishProperty('init', key, computed,\n                    new WrappingNode(token).finishAssignmentPattern(key, value), false, true);\n            }\n            return node.finishProperty('init', key, computed, key, false, true);\n        }\n\n        throwUnexpectedToken(lookahead);\n    }\n\n    function parseObjectInitializer() {\n        var properties = [], hasProto = {value: false}, node = new Node();\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parseObjectProperty(hasProto));\n\n            if (!match('}')) {\n                expectCommaSeparator();\n            }\n        }\n\n        expect('}');\n\n        return node.finishObjectExpression(properties);\n    }\n\n    function reinterpretExpressionAsPattern(expr) {\n        var i;\n        switch (expr.type) {\n        case Syntax.Identifier:\n        case Syntax.MemberExpression:\n        case Syntax.RestElement:\n        case Syntax.AssignmentPattern:\n            break;\n        case Syntax.SpreadElement:\n            expr.type = Syntax.RestElement;\n            reinterpretExpressionAsPattern(expr.argument);\n            break;\n        case Syntax.ArrayExpression:\n            expr.type = Syntax.ArrayPattern;\n            for (i = 0; i < expr.elements.length; i++) {\n                if (expr.elements[i] !== null) {\n                    reinterpretExpressionAsPattern(expr.elements[i]);\n                }\n            }\n            break;\n        case Syntax.ObjectExpression:\n            expr.type = Syntax.ObjectPattern;\n            for (i = 0; i < expr.properties.length; i++) {\n                reinterpretExpressionAsPattern(expr.properties[i].value);\n            }\n            break;\n        case Syntax.AssignmentExpression:\n            expr.type = Syntax.AssignmentPattern;\n            reinterpretExpressionAsPattern(expr.left);\n            break;\n        default:\n            // Allow other node type for tolerant parsing.\n            break;\n        }\n    }\n\n    // ECMA-262 12.2.9 Template Literals\n\n    function parseTemplateElement(option) {\n        var node, token;\n\n        if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) {\n            throwUnexpectedToken();\n        }\n\n        node = new Node();\n        token = lex();\n\n        return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail);\n    }\n\n    function parseTemplateLiteral() {\n        var quasi, quasis, expressions, node = new Node();\n\n        quasi = parseTemplateElement({ head: true });\n        quasis = [quasi];\n        expressions = [];\n\n        while (!quasi.tail) {\n            expressions.push(parseExpression());\n            quasi = parseTemplateElement({ head: false });\n            quasis.push(quasi);\n        }\n\n        return node.finishTemplateLiteral(quasis, expressions);\n    }\n\n    // ECMA-262 12.2.10 The Grouping Operator\n\n    function parseGroupExpression() {\n        var expr, expressions, startToken, i, params = [];\n\n        expect('(');\n\n        if (match(')')) {\n            lex();\n            if (!match('=>')) {\n                expect('=>');\n            }\n            return {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: [],\n                rawParams: []\n            };\n        }\n\n        startToken = lookahead;\n        if (match('...')) {\n            expr = parseRestElement(params);\n            expect(')');\n            if (!match('=>')) {\n                expect('=>');\n            }\n            return {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: [expr]\n            };\n        }\n\n        isBindingElement = true;\n        expr = inheritCoverGrammar(parseAssignmentExpression);\n\n        if (match(',')) {\n            isAssignmentTarget = false;\n            expressions = [expr];\n\n            while (startIndex < length) {\n                if (!match(',')) {\n                    break;\n                }\n                lex();\n\n                if (match('...')) {\n                    if (!isBindingElement) {\n                        throwUnexpectedToken(lookahead);\n                    }\n                    expressions.push(parseRestElement(params));\n                    expect(')');\n                    if (!match('=>')) {\n                        expect('=>');\n                    }\n                    isBindingElement = false;\n                    for (i = 0; i < expressions.length; i++) {\n                        reinterpretExpressionAsPattern(expressions[i]);\n                    }\n                    return {\n                        type: PlaceHolders.ArrowParameterPlaceHolder,\n                        params: expressions\n                    };\n                }\n\n                expressions.push(inheritCoverGrammar(parseAssignmentExpression));\n            }\n\n            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);\n        }\n\n\n        expect(')');\n\n        if (match('=>')) {\n            if (expr.type === Syntax.Identifier && expr.name === 'yield') {\n                return {\n                    type: PlaceHolders.ArrowParameterPlaceHolder,\n                    params: [expr]\n                };\n            }\n\n            if (!isBindingElement) {\n                throwUnexpectedToken(lookahead);\n            }\n\n            if (expr.type === Syntax.SequenceExpression) {\n                for (i = 0; i < expr.expressions.length; i++) {\n                    reinterpretExpressionAsPattern(expr.expressions[i]);\n                }\n            } else {\n                reinterpretExpressionAsPattern(expr);\n            }\n\n            expr = {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr]\n            };\n        }\n        isBindingElement = false;\n        return expr;\n    }\n\n\n    // ECMA-262 12.2 Primary Expressions\n\n    function parsePrimaryExpression() {\n        var type, token, expr, node;\n\n        if (match('(')) {\n            isBindingElement = false;\n            return inheritCoverGrammar(parseGroupExpression);\n        }\n\n        if (match('[')) {\n            return inheritCoverGrammar(parseArrayInitializer);\n        }\n\n        if (match('{')) {\n            return inheritCoverGrammar(parseObjectInitializer);\n        }\n\n        type = lookahead.type;\n        node = new Node();\n\n        if (type === Token.Identifier) {\n            if (state.sourceType === 'module' && lookahead.value === 'await') {\n                tolerateUnexpectedToken(lookahead);\n            }\n            expr = node.finishIdentifier(lex().value);\n        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            if (strict && lookahead.octal) {\n                tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral);\n            }\n            expr = node.finishLiteral(lex());\n        } else if (type === Token.Keyword) {\n            if (!strict && state.allowYield && matchKeyword('yield')) {\n                return parseNonComputedProperty();\n            }\n            isAssignmentTarget = isBindingElement = false;\n            if (matchKeyword('function')) {\n                return parseFunctionExpression();\n            }\n            if (matchKeyword('this')) {\n                lex();\n                return node.finishThisExpression();\n            }\n            if (matchKeyword('class')) {\n                return parseClassExpression();\n            }\n            if (!strict && matchKeyword('let')) {\n                return node.finishIdentifier(lex().value);\n            }\n            throwUnexpectedToken(lex());\n        } else if (type === Token.BooleanLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            token = lex();\n            token.value = (token.value === 'true');\n            expr = node.finishLiteral(token);\n        } else if (type === Token.NullLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            token = lex();\n            token.value = null;\n            expr = node.finishLiteral(token);\n        } else if (match('/') || match('/=')) {\n            isAssignmentTarget = isBindingElement = false;\n            index = startIndex;\n\n            if (typeof extra.tokens !== 'undefined') {\n                token = collectRegex();\n            } else {\n                token = scanRegExp();\n            }\n            lex();\n            expr = node.finishLiteral(token);\n        } else if (type === Token.Template) {\n            expr = parseTemplateLiteral();\n        } else {\n            throwUnexpectedToken(lex());\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.3 Left-Hand-Side Expressions\n\n    function parseArguments() {\n        var args = [], expr;\n\n        expect('(');\n\n        if (!match(')')) {\n            while (startIndex < length) {\n                if (match('...')) {\n                    expr = new Node();\n                    lex();\n                    expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression));\n                } else {\n                    expr = isolateCoverGrammar(parseAssignmentExpression);\n                }\n                args.push(expr);\n                if (match(')')) {\n                    break;\n                }\n                expectCommaSeparator();\n            }\n        }\n\n        expect(')');\n\n        return args;\n    }\n\n    function parseNonComputedProperty() {\n        var token, node = new Node();\n\n        token = lex();\n\n        if (!isIdentifierName(token)) {\n            throwUnexpectedToken(token);\n        }\n\n        return node.finishIdentifier(token.value);\n    }\n\n    function parseNonComputedMember() {\n        expect('.');\n\n        return parseNonComputedProperty();\n    }\n\n    function parseComputedMember() {\n        var expr;\n\n        expect('[');\n\n        expr = isolateCoverGrammar(parseExpression);\n\n        expect(']');\n\n        return expr;\n    }\n\n    // ECMA-262 12.3.3 The new Operator\n\n    function parseNewExpression() {\n        var callee, args, node = new Node();\n\n        expectKeyword('new');\n\n        if (match('.')) {\n            lex();\n            if (lookahead.type === Token.Identifier && lookahead.value === 'target') {\n                if (state.inFunctionBody) {\n                    lex();\n                    return node.finishMetaProperty('new', 'target');\n                }\n            }\n            throwUnexpectedToken(lookahead);\n        }\n\n        callee = isolateCoverGrammar(parseLeftHandSideExpression);\n        args = match('(') ? parseArguments() : [];\n\n        isAssignmentTarget = isBindingElement = false;\n\n        return node.finishNewExpression(callee, args);\n    }\n\n    // ECMA-262 12.3.4 Function Calls\n\n    function parseLeftHandSideExpressionAllowCall() {\n        var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn;\n\n        startToken = lookahead;\n        state.allowIn = true;\n\n        if (matchKeyword('super') && state.inFunctionBody) {\n            expr = new Node();\n            lex();\n            expr = expr.finishSuper();\n            if (!match('(') && !match('.') && !match('[')) {\n                throwUnexpectedToken(lookahead);\n            }\n        } else {\n            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);\n        }\n\n        for (;;) {\n            if (match('.')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseNonComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);\n            } else if (match('(')) {\n                isBindingElement = false;\n                isAssignmentTarget = false;\n                args = parseArguments();\n                expr = new WrappingNode(startToken).finishCallExpression(expr, args);\n            } else if (match('[')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);\n            } else if (lookahead.type === Token.Template && lookahead.head) {\n                quasi = parseTemplateLiteral();\n                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);\n            } else {\n                break;\n            }\n        }\n        state.allowIn = previousAllowIn;\n\n        return expr;\n    }\n\n    // ECMA-262 12.3 Left-Hand-Side Expressions\n\n    function parseLeftHandSideExpression() {\n        var quasi, expr, property, startToken;\n        assert(state.allowIn, 'callee of new expression always allow in keyword.');\n\n        startToken = lookahead;\n\n        if (matchKeyword('super') && state.inFunctionBody) {\n            expr = new Node();\n            lex();\n            expr = expr.finishSuper();\n            if (!match('[') && !match('.')) {\n                throwUnexpectedToken(lookahead);\n            }\n        } else {\n            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);\n        }\n\n        for (;;) {\n            if (match('[')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);\n            } else if (match('.')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseNonComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);\n            } else if (lookahead.type === Token.Template && lookahead.head) {\n                quasi = parseTemplateLiteral();\n                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);\n            } else {\n                break;\n            }\n        }\n        return expr;\n    }\n\n    // ECMA-262 12.4 Postfix Expressions\n\n    function parsePostfixExpression() {\n        var expr, token, startToken = lookahead;\n\n        expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall);\n\n        if (!hasLineTerminator && lookahead.type === Token.Punctuator) {\n            if (match('++') || match('--')) {\n                // ECMA-262 11.3.1, 11.3.2\n                if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {\n                    tolerateError(Messages.StrictLHSPostfix);\n                }\n\n                if (!isAssignmentTarget) {\n                    tolerateError(Messages.InvalidLHSInAssignment);\n                }\n\n                isAssignmentTarget = isBindingElement = false;\n\n                token = lex();\n                expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr);\n            }\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.5 Unary Operators\n\n    function parseUnaryExpression() {\n        var token, expr, startToken;\n\n        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {\n            expr = parsePostfixExpression();\n        } else if (match('++') || match('--')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            // ECMA-262 11.4.4, 11.4.5\n            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {\n                tolerateError(Messages.StrictLHSPrefix);\n            }\n\n            if (!isAssignmentTarget) {\n                tolerateError(Messages.InvalidLHSInAssignment);\n            }\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            isAssignmentTarget = isBindingElement = false;\n        } else if (match('+') || match('-') || match('~') || match('!')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            isAssignmentTarget = isBindingElement = false;\n        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) {\n                tolerateError(Messages.StrictDelete);\n            }\n            isAssignmentTarget = isBindingElement = false;\n        } else {\n            expr = parsePostfixExpression();\n        }\n\n        return expr;\n    }\n\n    function binaryPrecedence(token, allowIn) {\n        var prec = 0;\n\n        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {\n            return 0;\n        }\n\n        switch (token.value) {\n        case '||':\n            prec = 1;\n            break;\n\n        case '&&':\n            prec = 2;\n            break;\n\n        case '|':\n            prec = 3;\n            break;\n\n        case '^':\n            prec = 4;\n            break;\n\n        case '&':\n            prec = 5;\n            break;\n\n        case '==':\n        case '!=':\n        case '===':\n        case '!==':\n            prec = 6;\n            break;\n\n        case '<':\n        case '>':\n        case '<=':\n        case '>=':\n        case 'instanceof':\n            prec = 7;\n            break;\n\n        case 'in':\n            prec = allowIn ? 7 : 0;\n            break;\n\n        case '<<':\n        case '>>':\n        case '>>>':\n            prec = 8;\n            break;\n\n        case '+':\n        case '-':\n            prec = 9;\n            break;\n\n        case '*':\n        case '/':\n        case '%':\n            prec = 11;\n            break;\n\n        default:\n            break;\n        }\n\n        return prec;\n    }\n\n    // ECMA-262 12.6 Multiplicative Operators\n    // ECMA-262 12.7 Additive Operators\n    // ECMA-262 12.8 Bitwise Shift Operators\n    // ECMA-262 12.9 Relational Operators\n    // ECMA-262 12.10 Equality Operators\n    // ECMA-262 12.11 Binary Bitwise Operators\n    // ECMA-262 12.12 Binary Logical Operators\n\n    function parseBinaryExpression() {\n        var marker, markers, expr, token, prec, stack, right, operator, left, i;\n\n        marker = lookahead;\n        left = inheritCoverGrammar(parseUnaryExpression);\n\n        token = lookahead;\n        prec = binaryPrecedence(token, state.allowIn);\n        if (prec === 0) {\n            return left;\n        }\n        isAssignmentTarget = isBindingElement = false;\n        token.prec = prec;\n        lex();\n\n        markers = [marker, lookahead];\n        right = isolateCoverGrammar(parseUnaryExpression);\n\n        stack = [left, token, right];\n\n        while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) {\n\n            // Reduce: make a binary expression from the three topmost entries.\n            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {\n                right = stack.pop();\n                operator = stack.pop().value;\n                left = stack.pop();\n                markers.pop();\n                expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right);\n                stack.push(expr);\n            }\n\n            // Shift.\n            token = lex();\n            token.prec = prec;\n            stack.push(token);\n            markers.push(lookahead);\n            expr = isolateCoverGrammar(parseUnaryExpression);\n            stack.push(expr);\n        }\n\n        // Final reduce to clean-up the stack.\n        i = stack.length - 1;\n        expr = stack[i];\n        markers.pop();\n        while (i > 1) {\n            expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr);\n            i -= 2;\n        }\n\n        return expr;\n    }\n\n\n    // ECMA-262 12.13 Conditional Operator\n\n    function parseConditionalExpression() {\n        var expr, previousAllowIn, consequent, alternate, startToken;\n\n        startToken = lookahead;\n\n        expr = inheritCoverGrammar(parseBinaryExpression);\n        if (match('?')) {\n            lex();\n            previousAllowIn = state.allowIn;\n            state.allowIn = true;\n            consequent = isolateCoverGrammar(parseAssignmentExpression);\n            state.allowIn = previousAllowIn;\n            expect(':');\n            alternate = isolateCoverGrammar(parseAssignmentExpression);\n\n            expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate);\n            isAssignmentTarget = isBindingElement = false;\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 14.2 Arrow Function Definitions\n\n    function parseConciseBody() {\n        if (match('{')) {\n            return parseFunctionSourceElements();\n        }\n        return isolateCoverGrammar(parseAssignmentExpression);\n    }\n\n    function checkPatternParam(options, param) {\n        var i;\n        switch (param.type) {\n        case Syntax.Identifier:\n            validateParam(options, param, param.name);\n            break;\n        case Syntax.RestElement:\n            checkPatternParam(options, param.argument);\n            break;\n        case Syntax.AssignmentPattern:\n            checkPatternParam(options, param.left);\n            break;\n        case Syntax.ArrayPattern:\n            for (i = 0; i < param.elements.length; i++) {\n                if (param.elements[i] !== null) {\n                    checkPatternParam(options, param.elements[i]);\n                }\n            }\n            break;\n        case Syntax.YieldExpression:\n            break;\n        default:\n            assert(param.type === Syntax.ObjectPattern, 'Invalid type');\n            for (i = 0; i < param.properties.length; i++) {\n                checkPatternParam(options, param.properties[i].value);\n            }\n            break;\n        }\n    }\n    function reinterpretAsCoverFormalsList(expr) {\n        var i, len, param, params, defaults, defaultCount, options, token;\n\n        defaults = [];\n        defaultCount = 0;\n        params = [expr];\n\n        switch (expr.type) {\n        case Syntax.Identifier:\n            break;\n        case PlaceHolders.ArrowParameterPlaceHolder:\n            params = expr.params;\n            break;\n        default:\n            return null;\n        }\n\n        options = {\n            paramSet: {}\n        };\n\n        for (i = 0, len = params.length; i < len; i += 1) {\n            param = params[i];\n            switch (param.type) {\n            case Syntax.AssignmentPattern:\n                params[i] = param.left;\n                if (param.right.type === Syntax.YieldExpression) {\n                    if (param.right.argument) {\n                        throwUnexpectedToken(lookahead);\n                    }\n                    param.right.type = Syntax.Identifier;\n                    param.right.name = 'yield';\n                    delete param.right.argument;\n                    delete param.right.delegate;\n                }\n                defaults.push(param.right);\n                ++defaultCount;\n                checkPatternParam(options, param.left);\n                break;\n            default:\n                checkPatternParam(options, param);\n                params[i] = param;\n                defaults.push(null);\n                break;\n            }\n        }\n\n        if (strict || !state.allowYield) {\n            for (i = 0, len = params.length; i < len; i += 1) {\n                param = params[i];\n                if (param.type === Syntax.YieldExpression) {\n                    throwUnexpectedToken(lookahead);\n                }\n            }\n        }\n\n        if (options.message === Messages.StrictParamDupe) {\n            token = strict ? options.stricted : options.firstRestricted;\n            throwUnexpectedToken(token, options.message);\n        }\n\n        if (defaultCount === 0) {\n            defaults = [];\n        }\n\n        return {\n            params: params,\n            defaults: defaults,\n            stricted: options.stricted,\n            firstRestricted: options.firstRestricted,\n            message: options.message\n        };\n    }\n\n    function parseArrowFunctionExpression(options, node) {\n        var previousStrict, previousAllowYield, body;\n\n        if (hasLineTerminator) {\n            tolerateUnexpectedToken(lookahead);\n        }\n        expect('=>');\n\n        previousStrict = strict;\n        previousAllowYield = state.allowYield;\n        state.allowYield = true;\n\n        body = parseConciseBody();\n\n        if (strict && options.firstRestricted) {\n            throwUnexpectedToken(options.firstRestricted, options.message);\n        }\n        if (strict && options.stricted) {\n            tolerateUnexpectedToken(options.stricted, options.message);\n        }\n\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement);\n    }\n\n    // ECMA-262 14.4 Yield expression\n\n    function parseYieldExpression() {\n        var argument, expr, delegate, previousAllowYield;\n\n        argument = null;\n        expr = new Node();\n\n        expectKeyword('yield');\n\n        if (!hasLineTerminator) {\n            previousAllowYield = state.allowYield;\n            state.allowYield = false;\n            delegate = match('*');\n            if (delegate) {\n                lex();\n                argument = parseAssignmentExpression();\n            } else {\n                if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) {\n                    argument = parseAssignmentExpression();\n                }\n            }\n            state.allowYield = previousAllowYield;\n        }\n\n        return expr.finishYieldExpression(argument, delegate);\n    }\n\n    // ECMA-262 12.14 Assignment Operators\n\n    function parseAssignmentExpression() {\n        var token, expr, right, list, startToken;\n\n        startToken = lookahead;\n        token = lookahead;\n\n        if (!state.allowYield && matchKeyword('yield')) {\n            return parseYieldExpression();\n        }\n\n        expr = parseConditionalExpression();\n\n        if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) {\n            isAssignmentTarget = isBindingElement = false;\n            list = reinterpretAsCoverFormalsList(expr);\n\n            if (list) {\n                firstCoverInitializedNameError = null;\n                return parseArrowFunctionExpression(list, new WrappingNode(startToken));\n            }\n\n            return expr;\n        }\n\n        if (matchAssign()) {\n            if (!isAssignmentTarget) {\n                tolerateError(Messages.InvalidLHSInAssignment);\n            }\n\n            // ECMA-262 12.1.1\n            if (strict && expr.type === Syntax.Identifier) {\n                if (isRestrictedWord(expr.name)) {\n                    tolerateUnexpectedToken(token, Messages.StrictLHSAssignment);\n                }\n                if (isStrictModeReservedWord(expr.name)) {\n                    tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n                }\n            }\n\n            if (!match('=')) {\n                isAssignmentTarget = isBindingElement = false;\n            } else {\n                reinterpretExpressionAsPattern(expr);\n            }\n\n            token = lex();\n            right = isolateCoverGrammar(parseAssignmentExpression);\n            expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right);\n            firstCoverInitializedNameError = null;\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.15 Comma Operator\n\n    function parseExpression() {\n        var expr, startToken = lookahead, expressions;\n\n        expr = isolateCoverGrammar(parseAssignmentExpression);\n\n        if (match(',')) {\n            expressions = [expr];\n\n            while (startIndex < length) {\n                if (!match(',')) {\n                    break;\n                }\n                lex();\n                expressions.push(isolateCoverGrammar(parseAssignmentExpression));\n            }\n\n            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 13.2 Block\n\n    function parseStatementListItem() {\n        if (lookahead.type === Token.Keyword) {\n            switch (lookahead.value) {\n            case 'export':\n                if (state.sourceType !== 'module') {\n                    tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration);\n                }\n                return parseExportDeclaration();\n            case 'import':\n                if (state.sourceType !== 'module') {\n                    tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration);\n                }\n                return parseImportDeclaration();\n            case 'const':\n                return parseLexicalDeclaration({inFor: false});\n            case 'function':\n                return parseFunctionDeclaration(new Node());\n            case 'class':\n                return parseClassDeclaration();\n            }\n        }\n\n        if (matchKeyword('let') && isLexicalDeclaration()) {\n            return parseLexicalDeclaration({inFor: false});\n        }\n\n        return parseStatement();\n    }\n\n    function parseStatementList() {\n        var list = [];\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            list.push(parseStatementListItem());\n        }\n\n        return list;\n    }\n\n    function parseBlock() {\n        var block, node = new Node();\n\n        expect('{');\n\n        block = parseStatementList();\n\n        expect('}');\n\n        return node.finishBlockStatement(block);\n    }\n\n    // ECMA-262 13.3.2 Variable Statement\n\n    function parseVariableIdentifier(kind) {\n        var token, node = new Node();\n\n        token = lex();\n\n        if (token.type === Token.Keyword && token.value === 'yield') {\n            if (strict) {\n                tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n            } if (!state.allowYield) {\n                throwUnexpectedToken(token);\n            }\n        } else if (token.type !== Token.Identifier) {\n            if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) {\n                tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n            } else {\n                if (strict || token.value !== 'let' || kind !== 'var') {\n                    throwUnexpectedToken(token);\n                }\n            }\n        } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') {\n            tolerateUnexpectedToken(token);\n        }\n\n        return node.finishIdentifier(token.value);\n    }\n\n    function parseVariableDeclaration(options) {\n        var init = null, id, node = new Node(), params = [];\n\n        id = parsePattern(params, 'var');\n\n        // ECMA-262 12.2.1\n        if (strict && isRestrictedWord(id.name)) {\n            tolerateError(Messages.StrictVarName);\n        }\n\n        if (match('=')) {\n            lex();\n            init = isolateCoverGrammar(parseAssignmentExpression);\n        } else if (id.type !== Syntax.Identifier && !options.inFor) {\n            expect('=');\n        }\n\n        return node.finishVariableDeclarator(id, init);\n    }\n\n    function parseVariableDeclarationList(options) {\n        var list = [];\n\n        do {\n            list.push(parseVariableDeclaration({ inFor: options.inFor }));\n            if (!match(',')) {\n                break;\n            }\n            lex();\n        } while (startIndex < length);\n\n        return list;\n    }\n\n    function parseVariableStatement(node) {\n        var declarations;\n\n        expectKeyword('var');\n\n        declarations = parseVariableDeclarationList({ inFor: false });\n\n        consumeSemicolon();\n\n        return node.finishVariableDeclaration(declarations);\n    }\n\n    // ECMA-262 13.3.1 Let and Const Declarations\n\n    function parseLexicalBinding(kind, options) {\n        var init = null, id, node = new Node(), params = [];\n\n        id = parsePattern(params, kind);\n\n        // ECMA-262 12.2.1\n        if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) {\n            tolerateError(Messages.StrictVarName);\n        }\n\n        if (kind === 'const') {\n            if (!matchKeyword('in') && !matchContextualKeyword('of')) {\n                expect('=');\n                init = isolateCoverGrammar(parseAssignmentExpression);\n            }\n        } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) {\n            expect('=');\n            init = isolateCoverGrammar(parseAssignmentExpression);\n        }\n\n        return node.finishVariableDeclarator(id, init);\n    }\n\n    function parseBindingList(kind, options) {\n        var list = [];\n\n        do {\n            list.push(parseLexicalBinding(kind, options));\n            if (!match(',')) {\n                break;\n            }\n            lex();\n        } while (startIndex < length);\n\n        return list;\n    }\n\n\n    function tokenizerState() {\n        return {\n            index: index,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            hasLineTerminator: hasLineTerminator,\n            lastIndex: lastIndex,\n            lastLineNumber: lastLineNumber,\n            lastLineStart: lastLineStart,\n            startIndex: startIndex,\n            startLineNumber: startLineNumber,\n            startLineStart: startLineStart,\n            lookahead: lookahead,\n            tokenCount: extra.tokens ? extra.tokens.length : 0\n        };\n    }\n\n    function resetTokenizerState(ts) {\n        index = ts.index;\n        lineNumber = ts.lineNumber;\n        lineStart = ts.lineStart;\n        hasLineTerminator = ts.hasLineTerminator;\n        lastIndex = ts.lastIndex;\n        lastLineNumber = ts.lastLineNumber;\n        lastLineStart = ts.lastLineStart;\n        startIndex = ts.startIndex;\n        startLineNumber = ts.startLineNumber;\n        startLineStart = ts.startLineStart;\n        lookahead = ts.lookahead;\n        if (extra.tokens) {\n            extra.tokens.splice(ts.tokenCount, extra.tokens.length);\n        }\n    }\n\n    function isLexicalDeclaration() {\n        var lexical, ts;\n\n        ts = tokenizerState();\n\n        lex();\n        lexical = (lookahead.type === Token.Identifier) || match('[') || match('{') ||\n            matchKeyword('let') || matchKeyword('yield');\n\n        resetTokenizerState(ts);\n\n        return lexical;\n    }\n\n    function parseLexicalDeclaration(options) {\n        var kind, declarations, node = new Node();\n\n        kind = lex().value;\n        assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const');\n\n        declarations = parseBindingList(kind, options);\n\n        consumeSemicolon();\n\n        return node.finishLexicalDeclaration(declarations, kind);\n    }\n\n    function parseRestElement(params) {\n        var param, node = new Node();\n\n        lex();\n\n        if (match('{')) {\n            throwError(Messages.ObjectPatternAsRestParameter);\n        }\n\n        params.push(lookahead);\n\n        param = parseVariableIdentifier();\n\n        if (match('=')) {\n            throwError(Messages.DefaultRestParameter);\n        }\n\n        if (!match(')')) {\n            throwError(Messages.ParameterAfterRestParameter);\n        }\n\n        return node.finishRestElement(param);\n    }\n\n    // ECMA-262 13.4 Empty Statement\n\n    function parseEmptyStatement(node) {\n        expect(';');\n        return node.finishEmptyStatement();\n    }\n\n    // ECMA-262 12.4 Expression Statement\n\n    function parseExpressionStatement(node) {\n        var expr = parseExpression();\n        consumeSemicolon();\n        return node.finishExpressionStatement(expr);\n    }\n\n    // ECMA-262 13.6 If statement\n\n    function parseIfStatement(node) {\n        var test, consequent, alternate;\n\n        expectKeyword('if');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        consequent = parseStatement();\n\n        if (matchKeyword('else')) {\n            lex();\n            alternate = parseStatement();\n        } else {\n            alternate = null;\n        }\n\n        return node.finishIfStatement(test, consequent, alternate);\n    }\n\n    // ECMA-262 13.7 Iteration Statements\n\n    function parseDoWhileStatement(node) {\n        var body, test, oldInIteration;\n\n        expectKeyword('do');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = parseStatement();\n\n        state.inIteration = oldInIteration;\n\n        expectKeyword('while');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        if (match(';')) {\n            lex();\n        }\n\n        return node.finishDoWhileStatement(body, test);\n    }\n\n    function parseWhileStatement(node) {\n        var test, body, oldInIteration;\n\n        expectKeyword('while');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = parseStatement();\n\n        state.inIteration = oldInIteration;\n\n        return node.finishWhileStatement(test, body);\n    }\n\n    function parseForStatement(node) {\n        var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations,\n            body, oldInIteration, previousAllowIn = state.allowIn;\n\n        init = test = update = null;\n        forIn = true;\n\n        expectKeyword('for');\n\n        expect('(');\n\n        if (match(';')) {\n            lex();\n        } else {\n            if (matchKeyword('var')) {\n                init = new Node();\n                lex();\n\n                state.allowIn = false;\n                declarations = parseVariableDeclarationList({ inFor: true });\n                state.allowIn = previousAllowIn;\n\n                if (declarations.length === 1 && matchKeyword('in')) {\n                    init = init.finishVariableDeclaration(declarations);\n                    lex();\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {\n                    init = init.finishVariableDeclaration(declarations);\n                    lex();\n                    left = init;\n                    right = parseAssignmentExpression();\n                    init = null;\n                    forIn = false;\n                } else {\n                    init = init.finishVariableDeclaration(declarations);\n                    expect(';');\n                }\n            } else if (matchKeyword('const') || matchKeyword('let')) {\n                init = new Node();\n                kind = lex().value;\n\n                if (!strict && lookahead.value === 'in') {\n                    init = init.finishIdentifier(kind);\n                    lex();\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else {\n                    state.allowIn = false;\n                    declarations = parseBindingList(kind, {inFor: true});\n                    state.allowIn = previousAllowIn;\n\n                    if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) {\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                        lex();\n                        left = init;\n                        right = parseExpression();\n                        init = null;\n                    } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                        lex();\n                        left = init;\n                        right = parseAssignmentExpression();\n                        init = null;\n                        forIn = false;\n                    } else {\n                        consumeSemicolon();\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                    }\n                }\n            } else {\n                initStartToken = lookahead;\n                state.allowIn = false;\n                init = inheritCoverGrammar(parseAssignmentExpression);\n                state.allowIn = previousAllowIn;\n\n                if (matchKeyword('in')) {\n                    if (!isAssignmentTarget) {\n                        tolerateError(Messages.InvalidLHSInForIn);\n                    }\n\n                    lex();\n                    reinterpretExpressionAsPattern(init);\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else if (matchContextualKeyword('of')) {\n                    if (!isAssignmentTarget) {\n                        tolerateError(Messages.InvalidLHSInForLoop);\n                    }\n\n                    lex();\n                    reinterpretExpressionAsPattern(init);\n                    left = init;\n                    right = parseAssignmentExpression();\n                    init = null;\n                    forIn = false;\n                } else {\n                    if (match(',')) {\n                        initSeq = [init];\n                        while (match(',')) {\n                            lex();\n                            initSeq.push(isolateCoverGrammar(parseAssignmentExpression));\n                        }\n                        init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq);\n                    }\n                    expect(';');\n                }\n            }\n        }\n\n        if (typeof left === 'undefined') {\n\n            if (!match(';')) {\n                test = parseExpression();\n            }\n            expect(';');\n\n            if (!match(')')) {\n                update = parseExpression();\n            }\n        }\n\n        expect(')');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = isolateCoverGrammar(parseStatement);\n\n        state.inIteration = oldInIteration;\n\n        return (typeof left === 'undefined') ?\n                node.finishForStatement(init, test, update, body) :\n                forIn ? node.finishForInStatement(left, right, body) :\n                    node.finishForOfStatement(left, right, body);\n    }\n\n    // ECMA-262 13.8 The continue statement\n\n    function parseContinueStatement(node) {\n        var label = null, key;\n\n        expectKeyword('continue');\n\n        // Optimize the most common form: 'continue;'.\n        if (source.charCodeAt(startIndex) === 0x3B) {\n            lex();\n\n            if (!state.inIteration) {\n                throwError(Messages.IllegalContinue);\n            }\n\n            return node.finishContinueStatement(null);\n        }\n\n        if (hasLineTerminator) {\n            if (!state.inIteration) {\n                throwError(Messages.IllegalContinue);\n            }\n\n            return node.finishContinueStatement(null);\n        }\n\n        if (lookahead.type === Token.Identifier) {\n            label = parseVariableIdentifier();\n\n            key = '$' + label.name;\n            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.UnknownLabel, label.name);\n            }\n        }\n\n        consumeSemicolon();\n\n        if (label === null && !state.inIteration) {\n            throwError(Messages.IllegalContinue);\n        }\n\n        return node.finishContinueStatement(label);\n    }\n\n    // ECMA-262 13.9 The break statement\n\n    function parseBreakStatement(node) {\n        var label = null, key;\n\n        expectKeyword('break');\n\n        // Catch the very common case first: immediately a semicolon (U+003B).\n        if (source.charCodeAt(lastIndex) === 0x3B) {\n            lex();\n\n            if (!(state.inIteration || state.inSwitch)) {\n                throwError(Messages.IllegalBreak);\n            }\n\n            return node.finishBreakStatement(null);\n        }\n\n        if (hasLineTerminator) {\n            if (!(state.inIteration || state.inSwitch)) {\n                throwError(Messages.IllegalBreak);\n            }\n        } else if (lookahead.type === Token.Identifier) {\n            label = parseVariableIdentifier();\n\n            key = '$' + label.name;\n            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.UnknownLabel, label.name);\n            }\n        }\n\n        consumeSemicolon();\n\n        if (label === null && !(state.inIteration || state.inSwitch)) {\n            throwError(Messages.IllegalBreak);\n        }\n\n        return node.finishBreakStatement(label);\n    }\n\n    // ECMA-262 13.10 The return statement\n\n    function parseReturnStatement(node) {\n        var argument = null;\n\n        expectKeyword('return');\n\n        if (!state.inFunctionBody) {\n            tolerateError(Messages.IllegalReturn);\n        }\n\n        // 'return' followed by a space and an identifier is very common.\n        if (source.charCodeAt(lastIndex) === 0x20) {\n            if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) {\n                argument = parseExpression();\n                consumeSemicolon();\n                return node.finishReturnStatement(argument);\n            }\n        }\n\n        if (hasLineTerminator) {\n            // HACK\n            return node.finishReturnStatement(null);\n        }\n\n        if (!match(';')) {\n            if (!match('}') && lookahead.type !== Token.EOF) {\n                argument = parseExpression();\n            }\n        }\n\n        consumeSemicolon();\n\n        return node.finishReturnStatement(argument);\n    }\n\n    // ECMA-262 13.11 The with statement\n\n    function parseWithStatement(node) {\n        var object, body;\n\n        if (strict) {\n            tolerateError(Messages.StrictModeWith);\n        }\n\n        expectKeyword('with');\n\n        expect('(');\n\n        object = parseExpression();\n\n        expect(')');\n\n        body = parseStatement();\n\n        return node.finishWithStatement(object, body);\n    }\n\n    // ECMA-262 13.12 The switch statement\n\n    function parseSwitchCase() {\n        var test, consequent = [], statement, node = new Node();\n\n        if (matchKeyword('default')) {\n            lex();\n            test = null;\n        } else {\n            expectKeyword('case');\n            test = parseExpression();\n        }\n        expect(':');\n\n        while (startIndex < length) {\n            if (match('}') || matchKeyword('default') || matchKeyword('case')) {\n                break;\n            }\n            statement = parseStatementListItem();\n            consequent.push(statement);\n        }\n\n        return node.finishSwitchCase(test, consequent);\n    }\n\n    function parseSwitchStatement(node) {\n        var discriminant, cases, clause, oldInSwitch, defaultFound;\n\n        expectKeyword('switch');\n\n        expect('(');\n\n        discriminant = parseExpression();\n\n        expect(')');\n\n        expect('{');\n\n        cases = [];\n\n        if (match('}')) {\n            lex();\n            return node.finishSwitchStatement(discriminant, cases);\n        }\n\n        oldInSwitch = state.inSwitch;\n        state.inSwitch = true;\n        defaultFound = false;\n\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            clause = parseSwitchCase();\n            if (clause.test === null) {\n                if (defaultFound) {\n                    throwError(Messages.MultipleDefaultsInSwitch);\n                }\n                defaultFound = true;\n            }\n            cases.push(clause);\n        }\n\n        state.inSwitch = oldInSwitch;\n\n        expect('}');\n\n        return node.finishSwitchStatement(discriminant, cases);\n    }\n\n    // ECMA-262 13.14 The throw statement\n\n    function parseThrowStatement(node) {\n        var argument;\n\n        expectKeyword('throw');\n\n        if (hasLineTerminator) {\n            throwError(Messages.NewlineAfterThrow);\n        }\n\n        argument = parseExpression();\n\n        consumeSemicolon();\n\n        return node.finishThrowStatement(argument);\n    }\n\n    // ECMA-262 13.15 The try statement\n\n    function parseCatchClause() {\n        var param, params = [], paramMap = {}, key, i, body, node = new Node();\n\n        expectKeyword('catch');\n\n        expect('(');\n        if (match(')')) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        param = parsePattern(params);\n        for (i = 0; i < params.length; i++) {\n            key = '$' + params[i].value;\n            if (Object.prototype.hasOwnProperty.call(paramMap, key)) {\n                tolerateError(Messages.DuplicateBinding, params[i].value);\n            }\n            paramMap[key] = true;\n        }\n\n        // ECMA-262 12.14.1\n        if (strict && isRestrictedWord(param.name)) {\n            tolerateError(Messages.StrictCatchVariable);\n        }\n\n        expect(')');\n        body = parseBlock();\n        return node.finishCatchClause(param, body);\n    }\n\n    function parseTryStatement(node) {\n        var block, handler = null, finalizer = null;\n\n        expectKeyword('try');\n\n        block = parseBlock();\n\n        if (matchKeyword('catch')) {\n            handler = parseCatchClause();\n        }\n\n        if (matchKeyword('finally')) {\n            lex();\n            finalizer = parseBlock();\n        }\n\n        if (!handler && !finalizer) {\n            throwError(Messages.NoCatchOrFinally);\n        }\n\n        return node.finishTryStatement(block, handler, finalizer);\n    }\n\n    // ECMA-262 13.16 The debugger statement\n\n    function parseDebuggerStatement(node) {\n        expectKeyword('debugger');\n\n        consumeSemicolon();\n\n        return node.finishDebuggerStatement();\n    }\n\n    // 13 Statements\n\n    function parseStatement() {\n        var type = lookahead.type,\n            expr,\n            labeledBody,\n            key,\n            node;\n\n        if (type === Token.EOF) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        if (type === Token.Punctuator && lookahead.value === '{') {\n            return parseBlock();\n        }\n        isAssignmentTarget = isBindingElement = true;\n        node = new Node();\n\n        if (type === Token.Punctuator) {\n            switch (lookahead.value) {\n            case ';':\n                return parseEmptyStatement(node);\n            case '(':\n                return parseExpressionStatement(node);\n            default:\n                break;\n            }\n        } else if (type === Token.Keyword) {\n            switch (lookahead.value) {\n            case 'break':\n                return parseBreakStatement(node);\n            case 'continue':\n                return parseContinueStatement(node);\n            case 'debugger':\n                return parseDebuggerStatement(node);\n            case 'do':\n                return parseDoWhileStatement(node);\n            case 'for':\n                return parseForStatement(node);\n            case 'function':\n                return parseFunctionDeclaration(node);\n            case 'if':\n                return parseIfStatement(node);\n            case 'return':\n                return parseReturnStatement(node);\n            case 'switch':\n                return parseSwitchStatement(node);\n            case 'throw':\n                return parseThrowStatement(node);\n            case 'try':\n                return parseTryStatement(node);\n            case 'var':\n                return parseVariableStatement(node);\n            case 'while':\n                return parseWhileStatement(node);\n            case 'with':\n                return parseWithStatement(node);\n            default:\n                break;\n            }\n        }\n\n        expr = parseExpression();\n\n        // ECMA-262 12.12 Labelled Statements\n        if ((expr.type === Syntax.Identifier) && match(':')) {\n            lex();\n\n            key = '$' + expr.name;\n            if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.Redeclaration, 'Label', expr.name);\n            }\n\n            state.labelSet[key] = true;\n            labeledBody = parseStatement();\n            delete state.labelSet[key];\n            return node.finishLabeledStatement(expr, labeledBody);\n        }\n\n        consumeSemicolon();\n\n        return node.finishExpressionStatement(expr);\n    }\n\n    // ECMA-262 14.1 Function Definition\n\n    function parseFunctionSourceElements() {\n        var statement, body = [], token, directive, firstRestricted,\n            oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount,\n            node = new Node();\n\n        expect('{');\n\n        while (startIndex < length) {\n            if (lookahead.type !== Token.StringLiteral) {\n                break;\n            }\n            token = lookahead;\n\n            statement = parseStatementListItem();\n            body.push(statement);\n            if (statement.expression.type !== Syntax.Literal) {\n                // this is not directive\n                break;\n            }\n            directive = source.slice(token.start + 1, token.end - 1);\n            if (directive === 'use strict') {\n                strict = true;\n                if (firstRestricted) {\n                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);\n                }\n            } else {\n                if (!firstRestricted && token.octal) {\n                    firstRestricted = token;\n                }\n            }\n        }\n\n        oldLabelSet = state.labelSet;\n        oldInIteration = state.inIteration;\n        oldInSwitch = state.inSwitch;\n        oldInFunctionBody = state.inFunctionBody;\n        oldParenthesisCount = state.parenthesizedCount;\n\n        state.labelSet = {};\n        state.inIteration = false;\n        state.inSwitch = false;\n        state.inFunctionBody = true;\n        state.parenthesizedCount = 0;\n\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            body.push(parseStatementListItem());\n        }\n\n        expect('}');\n\n        state.labelSet = oldLabelSet;\n        state.inIteration = oldInIteration;\n        state.inSwitch = oldInSwitch;\n        state.inFunctionBody = oldInFunctionBody;\n        state.parenthesizedCount = oldParenthesisCount;\n\n        return node.finishBlockStatement(body);\n    }\n\n    function validateParam(options, param, name) {\n        var key = '$' + name;\n        if (strict) {\n            if (isRestrictedWord(name)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamName;\n            }\n            if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamDupe;\n            }\n        } else if (!options.firstRestricted) {\n            if (isRestrictedWord(name)) {\n                options.firstRestricted = param;\n                options.message = Messages.StrictParamName;\n            } else if (isStrictModeReservedWord(name)) {\n                options.firstRestricted = param;\n                options.message = Messages.StrictReservedWord;\n            } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamDupe;\n            }\n        }\n        options.paramSet[key] = true;\n    }\n\n    function parseParam(options) {\n        var token, param, params = [], i, def;\n\n        token = lookahead;\n        if (token.value === '...') {\n            param = parseRestElement(params);\n            validateParam(options, param.argument, param.argument.name);\n            options.params.push(param);\n            options.defaults.push(null);\n            return false;\n        }\n\n        param = parsePatternWithDefault(params);\n        for (i = 0; i < params.length; i++) {\n            validateParam(options, params[i], params[i].value);\n        }\n\n        if (param.type === Syntax.AssignmentPattern) {\n            def = param.right;\n            param = param.left;\n            ++options.defaultCount;\n        }\n\n        options.params.push(param);\n        options.defaults.push(def);\n\n        return !match(')');\n    }\n\n    function parseParams(firstRestricted) {\n        var options;\n\n        options = {\n            params: [],\n            defaultCount: 0,\n            defaults: [],\n            firstRestricted: firstRestricted\n        };\n\n        expect('(');\n\n        if (!match(')')) {\n            options.paramSet = {};\n            while (startIndex < length) {\n                if (!parseParam(options)) {\n                    break;\n                }\n                expect(',');\n            }\n        }\n\n        expect(')');\n\n        if (options.defaultCount === 0) {\n            options.defaults = [];\n        }\n\n        return {\n            params: options.params,\n            defaults: options.defaults,\n            stricted: options.stricted,\n            firstRestricted: options.firstRestricted,\n            message: options.message\n        };\n    }\n\n    function parseFunctionDeclaration(node, identifierIsOptional) {\n        var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict,\n            isGenerator, previousAllowYield;\n\n        previousAllowYield = state.allowYield;\n\n        expectKeyword('function');\n\n        isGenerator = match('*');\n        if (isGenerator) {\n            lex();\n        }\n\n        if (!identifierIsOptional || !match('(')) {\n            token = lookahead;\n            id = parseVariableIdentifier();\n            if (strict) {\n                if (isRestrictedWord(token.value)) {\n                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);\n                }\n            } else {\n                if (isRestrictedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictFunctionName;\n                } else if (isStrictModeReservedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictReservedWord;\n                }\n            }\n        }\n\n        state.allowYield = !isGenerator;\n        tmp = parseParams(firstRestricted);\n        params = tmp.params;\n        defaults = tmp.defaults;\n        stricted = tmp.stricted;\n        firstRestricted = tmp.firstRestricted;\n        if (tmp.message) {\n            message = tmp.message;\n        }\n\n\n        previousStrict = strict;\n        body = parseFunctionSourceElements();\n        if (strict && firstRestricted) {\n            throwUnexpectedToken(firstRestricted, message);\n        }\n        if (strict && stricted) {\n            tolerateUnexpectedToken(stricted, message);\n        }\n\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator);\n    }\n\n    function parseFunctionExpression() {\n        var token, id = null, stricted, firstRestricted, message, tmp,\n            params = [], defaults = [], body, previousStrict, node = new Node(),\n            isGenerator, previousAllowYield;\n\n        previousAllowYield = state.allowYield;\n\n        expectKeyword('function');\n\n        isGenerator = match('*');\n        if (isGenerator) {\n            lex();\n        }\n\n        state.allowYield = !isGenerator;\n        if (!match('(')) {\n            token = lookahead;\n            id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier();\n            if (strict) {\n                if (isRestrictedWord(token.value)) {\n                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);\n                }\n            } else {\n                if (isRestrictedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictFunctionName;\n                } else if (isStrictModeReservedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictReservedWord;\n                }\n            }\n        }\n\n        tmp = parseParams(firstRestricted);\n        params = tmp.params;\n        defaults = tmp.defaults;\n        stricted = tmp.stricted;\n        firstRestricted = tmp.firstRestricted;\n        if (tmp.message) {\n            message = tmp.message;\n        }\n\n        previousStrict = strict;\n        body = parseFunctionSourceElements();\n        if (strict && firstRestricted) {\n            throwUnexpectedToken(firstRestricted, message);\n        }\n        if (strict && stricted) {\n            tolerateUnexpectedToken(stricted, message);\n        }\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishFunctionExpression(id, params, defaults, body, isGenerator);\n    }\n\n    // ECMA-262 14.5 Class Definitions\n\n    function parseClassBody() {\n        var classBody, token, isStatic, hasConstructor = false, body, method, computed, key;\n\n        classBody = new Node();\n\n        expect('{');\n        body = [];\n        while (!match('}')) {\n            if (match(';')) {\n                lex();\n            } else {\n                method = new Node();\n                token = lookahead;\n                isStatic = false;\n                computed = match('[');\n                if (match('*')) {\n                    lex();\n                } else {\n                    key = parseObjectPropertyKey();\n                    if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) {\n                        token = lookahead;\n                        isStatic = true;\n                        computed = match('[');\n                        if (match('*')) {\n                            lex();\n                        } else {\n                            key = parseObjectPropertyKey();\n                        }\n                    }\n                }\n                method = tryParseMethodDefinition(token, key, computed, method);\n                if (method) {\n                    method['static'] = isStatic; // jscs:ignore requireDotNotation\n                    if (method.kind === 'init') {\n                        method.kind = 'method';\n                    }\n                    if (!isStatic) {\n                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') {\n                            if (method.kind !== 'method' || !method.method || method.value.generator) {\n                                throwUnexpectedToken(token, Messages.ConstructorSpecialMethod);\n                            }\n                            if (hasConstructor) {\n                                throwUnexpectedToken(token, Messages.DuplicateConstructor);\n                            } else {\n                                hasConstructor = true;\n                            }\n                            method.kind = 'constructor';\n                        }\n                    } else {\n                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') {\n                            throwUnexpectedToken(token, Messages.StaticPrototype);\n                        }\n                    }\n                    method.type = Syntax.MethodDefinition;\n                    delete method.method;\n                    delete method.shorthand;\n                    body.push(method);\n                } else {\n                    throwUnexpectedToken(lookahead);\n                }\n            }\n        }\n        lex();\n        return classBody.finishClassBody(body);\n    }\n\n    function parseClassDeclaration(identifierIsOptional) {\n        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;\n        strict = true;\n\n        expectKeyword('class');\n\n        if (!identifierIsOptional || lookahead.type === Token.Identifier) {\n            id = parseVariableIdentifier();\n        }\n\n        if (matchKeyword('extends')) {\n            lex();\n            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);\n        }\n        classBody = parseClassBody();\n        strict = previousStrict;\n\n        return classNode.finishClassDeclaration(id, superClass, classBody);\n    }\n\n    function parseClassExpression() {\n        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;\n        strict = true;\n\n        expectKeyword('class');\n\n        if (lookahead.type === Token.Identifier) {\n            id = parseVariableIdentifier();\n        }\n\n        if (matchKeyword('extends')) {\n            lex();\n            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);\n        }\n        classBody = parseClassBody();\n        strict = previousStrict;\n\n        return classNode.finishClassExpression(id, superClass, classBody);\n    }\n\n    // ECMA-262 15.2 Modules\n\n    function parseModuleSpecifier() {\n        var node = new Node();\n\n        if (lookahead.type !== Token.StringLiteral) {\n            throwError(Messages.InvalidModuleSpecifier);\n        }\n        return node.finishLiteral(lex());\n    }\n\n    // ECMA-262 15.2.3 Exports\n\n    function parseExportSpecifier() {\n        var exported, local, node = new Node(), def;\n        if (matchKeyword('default')) {\n            // export {default} from 'something';\n            def = new Node();\n            lex();\n            local = def.finishIdentifier('default');\n        } else {\n            local = parseVariableIdentifier();\n        }\n        if (matchContextualKeyword('as')) {\n            lex();\n            exported = parseNonComputedProperty();\n        }\n        return node.finishExportSpecifier(local, exported);\n    }\n\n    function parseExportNamedDeclaration(node) {\n        var declaration = null,\n            isExportFromIdentifier,\n            src = null, specifiers = [];\n\n        // non-default export\n        if (lookahead.type === Token.Keyword) {\n            // covers:\n            // export var f = 1;\n            switch (lookahead.value) {\n                case 'let':\n                case 'const':\n                    declaration = parseLexicalDeclaration({inFor: false});\n                    return node.finishExportNamedDeclaration(declaration, specifiers, null);\n                case 'var':\n                case 'class':\n                case 'function':\n                    declaration = parseStatementListItem();\n                    return node.finishExportNamedDeclaration(declaration, specifiers, null);\n            }\n        }\n\n        expect('{');\n        while (!match('}')) {\n            isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default');\n            specifiers.push(parseExportSpecifier());\n            if (!match('}')) {\n                expect(',');\n                if (match('}')) {\n                    break;\n                }\n            }\n        }\n        expect('}');\n\n        if (matchContextualKeyword('from')) {\n            // covering:\n            // export {default} from 'foo';\n            // export {foo} from 'foo';\n            lex();\n            src = parseModuleSpecifier();\n            consumeSemicolon();\n        } else if (isExportFromIdentifier) {\n            // covering:\n            // export {default}; // missing fromClause\n            throwError(lookahead.value ?\n                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n        } else {\n            // cover\n            // export {foo};\n            consumeSemicolon();\n        }\n        return node.finishExportNamedDeclaration(declaration, specifiers, src);\n    }\n\n    function parseExportDefaultDeclaration(node) {\n        var declaration = null,\n            expression = null;\n\n        // covers:\n        // export default ...\n        expectKeyword('default');\n\n        if (matchKeyword('function')) {\n            // covers:\n            // export default function foo () {}\n            // export default function () {}\n            declaration = parseFunctionDeclaration(new Node(), true);\n            return node.finishExportDefaultDeclaration(declaration);\n        }\n        if (matchKeyword('class')) {\n            declaration = parseClassDeclaration(true);\n            return node.finishExportDefaultDeclaration(declaration);\n        }\n\n        if (matchContextualKeyword('from')) {\n            throwError(Messages.UnexpectedToken, lookahead.value);\n        }\n\n        // covers:\n        // export default {};\n        // export default [];\n        // export default (1 + 2);\n        if (match('{')) {\n            expression = parseObjectInitializer();\n        } else if (match('[')) {\n            expression = parseArrayInitializer();\n        } else {\n            expression = parseAssignmentExpression();\n        }\n        consumeSemicolon();\n        return node.finishExportDefaultDeclaration(expression);\n    }\n\n    function parseExportAllDeclaration(node) {\n        var src;\n\n        // covers:\n        // export * from 'foo';\n        expect('*');\n        if (!matchContextualKeyword('from')) {\n            throwError(lookahead.value ?\n                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n        }\n        lex();\n        src = parseModuleSpecifier();\n        consumeSemicolon();\n\n        return node.finishExportAllDeclaration(src);\n    }\n\n    function parseExportDeclaration() {\n        var node = new Node();\n        if (state.inFunctionBody) {\n            throwError(Messages.IllegalExportDeclaration);\n        }\n\n        expectKeyword('export');\n\n        if (matchKeyword('default')) {\n            return parseExportDefaultDeclaration(node);\n        }\n        if (match('*')) {\n            return parseExportAllDeclaration(node);\n        }\n        return parseExportNamedDeclaration(node);\n    }\n\n    // ECMA-262 15.2.2 Imports\n\n    function parseImportSpecifier() {\n        // import {<foo as bar>} ...;\n        var local, imported, node = new Node();\n\n        imported = parseNonComputedProperty();\n        if (matchContextualKeyword('as')) {\n            lex();\n            local = parseVariableIdentifier();\n        }\n\n        return node.finishImportSpecifier(local, imported);\n    }\n\n    function parseNamedImports() {\n        var specifiers = [];\n        // {foo, bar as bas}\n        expect('{');\n        while (!match('}')) {\n            specifiers.push(parseImportSpecifier());\n            if (!match('}')) {\n                expect(',');\n                if (match('}')) {\n                    break;\n                }\n            }\n        }\n        expect('}');\n        return specifiers;\n    }\n\n    function parseImportDefaultSpecifier() {\n        // import <foo> ...;\n        var local, node = new Node();\n\n        local = parseNonComputedProperty();\n\n        return node.finishImportDefaultSpecifier(local);\n    }\n\n    function parseImportNamespaceSpecifier() {\n        // import <* as foo> ...;\n        var local, node = new Node();\n\n        expect('*');\n        if (!matchContextualKeyword('as')) {\n            throwError(Messages.NoAsAfterImportNamespace);\n        }\n        lex();\n        local = parseNonComputedProperty();\n\n        return node.finishImportNamespaceSpecifier(local);\n    }\n\n    function parseImportDeclaration() {\n        var specifiers = [], src, node = new Node();\n\n        if (state.inFunctionBody) {\n            throwError(Messages.IllegalImportDeclaration);\n        }\n\n        expectKeyword('import');\n\n        if (lookahead.type === Token.StringLiteral) {\n            // import 'foo';\n            src = parseModuleSpecifier();\n        } else {\n\n            if (match('{')) {\n                // import {bar}\n                specifiers = specifiers.concat(parseNamedImports());\n            } else if (match('*')) {\n                // import * as foo\n                specifiers.push(parseImportNamespaceSpecifier());\n            } else if (isIdentifierName(lookahead) && !matchKeyword('default')) {\n                // import foo\n                specifiers.push(parseImportDefaultSpecifier());\n                if (match(',')) {\n                    lex();\n                    if (match('*')) {\n                        // import foo, * as foo\n                        specifiers.push(parseImportNamespaceSpecifier());\n                    } else if (match('{')) {\n                        // import foo, {bar}\n                        specifiers = specifiers.concat(parseNamedImports());\n                    } else {\n                        throwUnexpectedToken(lookahead);\n                    }\n                }\n            } else {\n                throwUnexpectedToken(lex());\n            }\n\n            if (!matchContextualKeyword('from')) {\n                throwError(lookahead.value ?\n                        Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n            }\n            lex();\n            src = parseModuleSpecifier();\n        }\n\n        consumeSemicolon();\n        return node.finishImportDeclaration(specifiers, src);\n    }\n\n    // ECMA-262 15.1 Scripts\n\n    function parseScriptBody() {\n        var statement, body = [], token, directive, firstRestricted;\n\n        while (startIndex < length) {\n            token = lookahead;\n            if (token.type !== Token.StringLiteral) {\n                break;\n            }\n\n            statement = parseStatementListItem();\n            body.push(statement);\n            if (statement.expression.type !== Syntax.Literal) {\n                // this is not directive\n                break;\n            }\n            directive = source.slice(token.start + 1, token.end - 1);\n            if (directive === 'use strict') {\n                strict = true;\n                if (firstRestricted) {\n                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);\n                }\n            } else {\n                if (!firstRestricted && token.octal) {\n                    firstRestricted = token;\n                }\n            }\n        }\n\n        while (startIndex < length) {\n            statement = parseStatementListItem();\n            /* istanbul ignore if */\n            if (typeof statement === 'undefined') {\n                break;\n            }\n            body.push(statement);\n        }\n        return body;\n    }\n\n    function parseProgram() {\n        var body, node;\n\n        peek();\n        node = new Node();\n\n        body = parseScriptBody();\n        return node.finishProgram(body, state.sourceType);\n    }\n\n    function filterTokenLocation() {\n        var i, entry, token, tokens = [];\n\n        for (i = 0; i < extra.tokens.length; ++i) {\n            entry = extra.tokens[i];\n            token = {\n                type: entry.type,\n                value: entry.value\n            };\n            if (entry.regex) {\n                token.regex = {\n                    pattern: entry.regex.pattern,\n                    flags: entry.regex.flags\n                };\n            }\n            if (extra.range) {\n                token.range = entry.range;\n            }\n            if (extra.loc) {\n                token.loc = entry.loc;\n            }\n            tokens.push(token);\n        }\n\n        extra.tokens = tokens;\n    }\n\n    function tokenize(code, options, delegate) {\n        var toString,\n            tokens;\n\n        toString = String;\n        if (typeof code !== 'string' && !(code instanceof String)) {\n            code = toString(code);\n        }\n\n        source = code;\n        index = 0;\n        lineNumber = (source.length > 0) ? 1 : 0;\n        lineStart = 0;\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n        length = source.length;\n        lookahead = null;\n        state = {\n            allowIn: true,\n            allowYield: true,\n            labelSet: {},\n            inFunctionBody: false,\n            inIteration: false,\n            inSwitch: false,\n            lastCommentStart: -1,\n            curlyStack: []\n        };\n\n        extra = {};\n\n        // Options matching.\n        options = options || {};\n\n        // Of course we collect tokens here.\n        options.tokens = true;\n        extra.tokens = [];\n        extra.tokenValues = [];\n        extra.tokenize = true;\n        extra.delegate = delegate;\n\n        // The following two fields are necessary to compute the Regex tokens.\n        extra.openParenToken = -1;\n        extra.openCurlyToken = -1;\n\n        extra.range = (typeof options.range === 'boolean') && options.range;\n        extra.loc = (typeof options.loc === 'boolean') && options.loc;\n\n        if (typeof options.comment === 'boolean' && options.comment) {\n            extra.comments = [];\n        }\n        if (typeof options.tolerant === 'boolean' && options.tolerant) {\n            extra.errors = [];\n        }\n\n        try {\n            peek();\n            if (lookahead.type === Token.EOF) {\n                return extra.tokens;\n            }\n\n            lex();\n            while (lookahead.type !== Token.EOF) {\n                try {\n                    lex();\n                } catch (lexError) {\n                    if (extra.errors) {\n                        recordError(lexError);\n                        // We have to break on the first error\n                        // to avoid infinite loops.\n                        break;\n                    } else {\n                        throw lexError;\n                    }\n                }\n            }\n\n            tokens = extra.tokens;\n            if (typeof extra.errors !== 'undefined') {\n                tokens.errors = extra.errors;\n            }\n        } catch (e) {\n            throw e;\n        } finally {\n            extra = {};\n        }\n        return tokens;\n    }\n\n    function parse(code, options) {\n        var program, toString;\n\n        toString = String;\n        if (typeof code !== 'string' && !(code instanceof String)) {\n            code = toString(code);\n        }\n\n        source = code;\n        index = 0;\n        lineNumber = (source.length > 0) ? 1 : 0;\n        lineStart = 0;\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n        length = source.length;\n        lookahead = null;\n        state = {\n            allowIn: true,\n            allowYield: true,\n            labelSet: {},\n            inFunctionBody: false,\n            inIteration: false,\n            inSwitch: false,\n            lastCommentStart: -1,\n            curlyStack: [],\n            sourceType: 'script'\n        };\n        strict = false;\n\n        extra = {};\n        if (typeof options !== 'undefined') {\n            extra.range = (typeof options.range === 'boolean') && options.range;\n            extra.loc = (typeof options.loc === 'boolean') && options.loc;\n            extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment;\n\n            if (extra.loc && options.source !== null && options.source !== undefined) {\n                extra.source = toString(options.source);\n            }\n\n            if (typeof options.tokens === 'boolean' && options.tokens) {\n                extra.tokens = [];\n            }\n            if (typeof options.comment === 'boolean' && options.comment) {\n                extra.comments = [];\n            }\n            if (typeof options.tolerant === 'boolean' && options.tolerant) {\n                extra.errors = [];\n            }\n            if (extra.attachComment) {\n                extra.range = true;\n                extra.comments = [];\n                extra.bottomRightStack = [];\n                extra.trailingComments = [];\n                extra.leadingComments = [];\n            }\n            if (options.sourceType === 'module') {\n                // very restrictive condition for now\n                state.sourceType = options.sourceType;\n                strict = true;\n            }\n        }\n\n        try {\n            program = parseProgram();\n            if (typeof extra.comments !== 'undefined') {\n                program.comments = extra.comments;\n            }\n            if (typeof extra.tokens !== 'undefined') {\n                filterTokenLocation();\n                program.tokens = extra.tokens;\n            }\n            if (typeof extra.errors !== 'undefined') {\n                program.errors = extra.errors;\n            }\n        } catch (e) {\n            throw e;\n        } finally {\n            extra = {};\n        }\n\n        return program;\n    }\n\n    // Sync with *.json manifests.\n    exports.version = '2.7.0';\n\n    exports.tokenize = tokenize;\n\n    exports.parse = parse;\n\n    // Deep copy.\n    /* istanbul ignore next */\n    exports.Syntax = (function () {\n        var name, types = {};\n\n        if (typeof Object.create === 'function') {\n            types = Object.create(null);\n        }\n\n        for (name in Syntax) {\n            if (Syntax.hasOwnProperty(name)) {\n                types[name] = Syntax[name];\n            }\n        }\n\n        if (typeof Object.freeze === 'function') {\n            Object.freeze(types);\n        }\n\n        return types;\n    }());\n\n}));\n/* vim: set sw=4 ts=4 et tw=80 : */\n",
-    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nfunction EventEmitter() {\n  this._events = this._events || {};\n  this._maxListeners = this._maxListeners || undefined;\n}\nmodule.exports = EventEmitter;\n\n// Backwards-compat with node 0.10.x\nEventEmitter.EventEmitter = EventEmitter;\n\nEventEmitter.prototype._events = undefined;\nEventEmitter.prototype._maxListeners = undefined;\n\n// By default EventEmitters will print a warning if more than 10 listeners are\n// added to it. This is a useful default which helps finding memory leaks.\nEventEmitter.defaultMaxListeners = 10;\n\n// Obviously not all Emitters should be limited to 10. This function allows\n// that to be increased. Set to zero for unlimited.\nEventEmitter.prototype.setMaxListeners = function(n) {\n  if (!isNumber(n) || n < 0 || isNaN(n))\n    throw TypeError('n must be a positive number');\n  this._maxListeners = n;\n  return this;\n};\n\nEventEmitter.prototype.emit = function(type) {\n  var er, handler, len, args, i, listeners;\n\n  if (!this._events)\n    this._events = {};\n\n  // If there is no 'error' event listener then throw.\n  if (type === 'error') {\n    if (!this._events.error ||\n        (isObject(this._events.error) && !this._events.error.length)) {\n      er = arguments[1];\n      if (er instanceof Error) {\n        throw er; // Unhandled 'error' event\n      }\n      throw TypeError('Uncaught, unspecified \"error\" event.');\n    }\n  }\n\n  handler = this._events[type];\n\n  if (isUndefined(handler))\n    return false;\n\n  if (isFunction(handler)) {\n    switch (arguments.length) {\n      // fast cases\n      case 1:\n        handler.call(this);\n        break;\n      case 2:\n        handler.call(this, arguments[1]);\n        break;\n      case 3:\n        handler.call(this, arguments[1], arguments[2]);\n        break;\n      // slower\n      default:\n        len = arguments.length;\n        args = new Array(len - 1);\n        for (i = 1; i < len; i++)\n          args[i - 1] = arguments[i];\n        handler.apply(this, args);\n    }\n  } else if (isObject(handler)) {\n    len = arguments.length;\n    args = new Array(len - 1);\n    for (i = 1; i < len; i++)\n      args[i - 1] = arguments[i];\n\n    listeners = handler.slice();\n    len = listeners.length;\n    for (i = 0; i < len; i++)\n      listeners[i].apply(this, args);\n  }\n\n  return true;\n};\n\nEventEmitter.prototype.addListener = function(type, listener) {\n  var m;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events)\n    this._events = {};\n\n  // To avoid recursion in the case that type === \"newListener\"! Before\n  // adding it to the listeners, first emit \"newListener\".\n  if (this._events.newListener)\n    this.emit('newListener', type,\n              isFunction(listener.listener) ?\n              listener.listener : listener);\n\n  if (!this._events[type])\n    // Optimize the case of one listener. Don't need the extra array object.\n    this._events[type] = listener;\n  else if (isObject(this._events[type]))\n    // If we've already got an array, just append.\n    this._events[type].push(listener);\n  else\n    // Adding the second element, need to change to array.\n    this._events[type] = [this._events[type], listener];\n\n  // Check for listener leak\n  if (isObject(this._events[type]) && !this._events[type].warned) {\n    var m;\n    if (!isUndefined(this._maxListeners)) {\n      m = this._maxListeners;\n    } else {\n      m = EventEmitter.defaultMaxListeners;\n    }\n\n    if (m && m > 0 && this._events[type].length > m) {\n      this._events[type].warned = true;\n      console.error('(node) warning: possible EventEmitter memory ' +\n                    'leak detected. %d listeners added. ' +\n                    'Use emitter.setMaxListeners() to increase limit.',\n                    this._events[type].length);\n      if (typeof console.trace === 'function') {\n        // not supported in IE 10\n        console.trace();\n      }\n    }\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.once = function(type, listener) {\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  var fired = false;\n\n  function g() {\n    this.removeListener(type, g);\n\n    if (!fired) {\n      fired = true;\n      listener.apply(this, arguments);\n    }\n  }\n\n  g.listener = listener;\n  this.on(type, g);\n\n  return this;\n};\n\n// emits a 'removeListener' event iff the listener was removed\nEventEmitter.prototype.removeListener = function(type, listener) {\n  var list, position, length, i;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events || !this._events[type])\n    return this;\n\n  list = this._events[type];\n  length = list.length;\n  position = -1;\n\n  if (list === listener ||\n      (isFunction(list.listener) && list.listener === listener)) {\n    delete this._events[type];\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n\n  } else if (isObject(list)) {\n    for (i = length; i-- > 0;) {\n      if (list[i] === listener ||\n          (list[i].listener && list[i].listener === listener)) {\n        position = i;\n        break;\n      }\n    }\n\n    if (position < 0)\n      return this;\n\n    if (list.length === 1) {\n      list.length = 0;\n      delete this._events[type];\n    } else {\n      list.splice(position, 1);\n    }\n\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.removeAllListeners = function(type) {\n  var key, listeners;\n\n  if (!this._events)\n    return this;\n\n  // not listening for removeListener, no need to emit\n  if (!this._events.removeListener) {\n    if (arguments.length === 0)\n      this._events = {};\n    else if (this._events[type])\n      delete this._events[type];\n    return this;\n  }\n\n  // emit removeListener for all listeners on all events\n  if (arguments.length === 0) {\n    for (key in this._events) {\n      if (key === 'removeListener') continue;\n      this.removeAllListeners(key);\n    }\n    this.removeAllListeners('removeListener');\n    this._events = {};\n    return this;\n  }\n\n  listeners = this._events[type];\n\n  if (isFunction(listeners)) {\n    this.removeListener(type, listeners);\n  } else {\n    // LIFO order\n    while (listeners.length)\n      this.removeListener(type, listeners[listeners.length - 1]);\n  }\n  delete this._events[type];\n\n  return this;\n};\n\nEventEmitter.prototype.listeners = function(type) {\n  var ret;\n  if (!this._events || !this._events[type])\n    ret = [];\n  else if (isFunction(this._events[type]))\n    ret = [this._events[type]];\n  else\n    ret = this._events[type].slice();\n  return ret;\n};\n\nEventEmitter.listenerCount = function(emitter, type) {\n  var ret;\n  if (!emitter._events || !emitter._events[type])\n    ret = 0;\n  else if (isFunction(emitter._events[type]))\n    ret = 1;\n  else\n    ret = emitter._events[type].length;\n  return ret;\n};\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\n",
-    "\nvar hasOwn = Object.prototype.hasOwnProperty;\nvar toString = Object.prototype.toString;\n\nmodule.exports = function forEach (obj, fn, ctx) {\n    if (toString.call(fn) !== '[object Function]') {\n        throw new TypeError('iterator must be a function');\n    }\n    var l = obj.length;\n    if (l === +l) {\n        for (var i = 0; i < l; i++) {\n            fn.call(ctx, obj[i], i, obj);\n        }\n    } else {\n        for (var k in obj) {\n            if (hasOwn.call(obj, k)) {\n                fn.call(ctx, obj[k], k, obj);\n            }\n        }\n    }\n};\n\n",
+    "/*\n  Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.\n\n  Redistribution and use in source and binary forms, with or without\n  modification, are permitted provided that the following conditions are met:\n\n    * Redistributions of source code must retain the above copyright\n      notice, this list of conditions and the following disclaimer.\n    * Redistributions in binary form must reproduce the above copyright\n      notice, this list of conditions and the following disclaimer in the\n      documentation and/or other materials provided with the distribution.\n\n  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY\n  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\n  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\n  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n*/\n\n(function (root, factory) {\n    'use strict';\n\n    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,\n    // Rhino, and plain browser loading.\n\n    /* istanbul ignore next */\n    if (typeof define === 'function' && define.amd) {\n        define(['exports'], factory);\n    } else if (typeof exports !== 'undefined') {\n        factory(exports);\n    } else {\n        factory((root.esprima = {}));\n    }\n}(this, function (exports) {\n    'use strict';\n\n    var Token,\n        TokenName,\n        FnExprTokens,\n        Syntax,\n        PlaceHolders,\n        Messages,\n        Regex,\n        source,\n        strict,\n        index,\n        lineNumber,\n        lineStart,\n        hasLineTerminator,\n        lastIndex,\n        lastLineNumber,\n        lastLineStart,\n        startIndex,\n        startLineNumber,\n        startLineStart,\n        scanning,\n        length,\n        lookahead,\n        state,\n        extra,\n        isBindingElement,\n        isAssignmentTarget,\n        firstCoverInitializedNameError;\n\n    Token = {\n        BooleanLiteral: 1,\n        EOF: 2,\n        Identifier: 3,\n        Keyword: 4,\n        NullLiteral: 5,\n        NumericLiteral: 6,\n        Punctuator: 7,\n        StringLiteral: 8,\n        RegularExpression: 9,\n        Template: 10\n    };\n\n    TokenName = {};\n    TokenName[Token.BooleanLiteral] = 'Boolean';\n    TokenName[Token.EOF] = '<end>';\n    TokenName[Token.Identifier] = 'Identifier';\n    TokenName[Token.Keyword] = 'Keyword';\n    TokenName[Token.NullLiteral] = 'Null';\n    TokenName[Token.NumericLiteral] = 'Numeric';\n    TokenName[Token.Punctuator] = 'Punctuator';\n    TokenName[Token.StringLiteral] = 'String';\n    TokenName[Token.RegularExpression] = 'RegularExpression';\n    TokenName[Token.Template] = 'Template';\n\n    // A function following one of those tokens is an expression.\n    FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',\n                    'return', 'case', 'delete', 'throw', 'void',\n                    // assignment operators\n                    '=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=',\n                    '&=', '|=', '^=', ',',\n                    // binary/unary operators\n                    '+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&',\n                    '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',\n                    '<=', '<', '>', '!=', '!=='];\n\n    Syntax = {\n        AssignmentExpression: 'AssignmentExpression',\n        AssignmentPattern: 'AssignmentPattern',\n        ArrayExpression: 'ArrayExpression',\n        ArrayPattern: 'ArrayPattern',\n        ArrowFunctionExpression: 'ArrowFunctionExpression',\n        BlockStatement: 'BlockStatement',\n        BinaryExpression: 'BinaryExpression',\n        BreakStatement: 'BreakStatement',\n        CallExpression: 'CallExpression',\n        CatchClause: 'CatchClause',\n        ClassBody: 'ClassBody',\n        ClassDeclaration: 'ClassDeclaration',\n        ClassExpression: 'ClassExpression',\n        ConditionalExpression: 'ConditionalExpression',\n        ContinueStatement: 'ContinueStatement',\n        DoWhileStatement: 'DoWhileStatement',\n        DebuggerStatement: 'DebuggerStatement',\n        EmptyStatement: 'EmptyStatement',\n        ExportAllDeclaration: 'ExportAllDeclaration',\n        ExportDefaultDeclaration: 'ExportDefaultDeclaration',\n        ExportNamedDeclaration: 'ExportNamedDeclaration',\n        ExportSpecifier: 'ExportSpecifier',\n        ExpressionStatement: 'ExpressionStatement',\n        ForStatement: 'ForStatement',\n        ForOfStatement: 'ForOfStatement',\n        ForInStatement: 'ForInStatement',\n        FunctionDeclaration: 'FunctionDeclaration',\n        FunctionExpression: 'FunctionExpression',\n        Identifier: 'Identifier',\n        IfStatement: 'IfStatement',\n        ImportDeclaration: 'ImportDeclaration',\n        ImportDefaultSpecifier: 'ImportDefaultSpecifier',\n        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',\n        ImportSpecifier: 'ImportSpecifier',\n        Literal: 'Literal',\n        LabeledStatement: 'LabeledStatement',\n        LogicalExpression: 'LogicalExpression',\n        MemberExpression: 'MemberExpression',\n        MetaProperty: 'MetaProperty',\n        MethodDefinition: 'MethodDefinition',\n        NewExpression: 'NewExpression',\n        ObjectExpression: 'ObjectExpression',\n        ObjectPattern: 'ObjectPattern',\n        Program: 'Program',\n        Property: 'Property',\n        RestElement: 'RestElement',\n        ReturnStatement: 'ReturnStatement',\n        SequenceExpression: 'SequenceExpression',\n        SpreadElement: 'SpreadElement',\n        Super: 'Super',\n        SwitchCase: 'SwitchCase',\n        SwitchStatement: 'SwitchStatement',\n        TaggedTemplateExpression: 'TaggedTemplateExpression',\n        TemplateElement: 'TemplateElement',\n        TemplateLiteral: 'TemplateLiteral',\n        ThisExpression: 'ThisExpression',\n        ThrowStatement: 'ThrowStatement',\n        TryStatement: 'TryStatement',\n        UnaryExpression: 'UnaryExpression',\n        UpdateExpression: 'UpdateExpression',\n        VariableDeclaration: 'VariableDeclaration',\n        VariableDeclarator: 'VariableDeclarator',\n        WhileStatement: 'WhileStatement',\n        WithStatement: 'WithStatement',\n        YieldExpression: 'YieldExpression'\n    };\n\n    PlaceHolders = {\n        ArrowParameterPlaceHolder: 'ArrowParameterPlaceHolder'\n    };\n\n    // Error messages should be identical to V8.\n    Messages = {\n        UnexpectedToken: 'Unexpected token %0',\n        UnexpectedNumber: 'Unexpected number',\n        UnexpectedString: 'Unexpected string',\n        UnexpectedIdentifier: 'Unexpected identifier',\n        UnexpectedReserved: 'Unexpected reserved word',\n        UnexpectedTemplate: 'Unexpected quasi %0',\n        UnexpectedEOS: 'Unexpected end of input',\n        NewlineAfterThrow: 'Illegal newline after throw',\n        InvalidRegExp: 'Invalid regular expression',\n        UnterminatedRegExp: 'Invalid regular expression: missing /',\n        InvalidLHSInAssignment: 'Invalid left-hand side in assignment',\n        InvalidLHSInForIn: 'Invalid left-hand side in for-in',\n        InvalidLHSInForLoop: 'Invalid left-hand side in for-loop',\n        MultipleDefaultsInSwitch: 'More than one default clause in switch statement',\n        NoCatchOrFinally: 'Missing catch or finally after try',\n        UnknownLabel: 'Undefined label \\'%0\\'',\n        Redeclaration: '%0 \\'%1\\' has already been declared',\n        IllegalContinue: 'Illegal continue statement',\n        IllegalBreak: 'Illegal break statement',\n        IllegalReturn: 'Illegal return statement',\n        StrictModeWith: 'Strict mode code may not include a with statement',\n        StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode',\n        StrictVarName: 'Variable name may not be eval or arguments in strict mode',\n        StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode',\n        StrictParamDupe: 'Strict mode function may not have duplicate parameter names',\n        StrictFunctionName: 'Function name may not be eval or arguments in strict mode',\n        StrictOctalLiteral: 'Octal literals are not allowed in strict mode.',\n        StrictDelete: 'Delete of an unqualified identifier in strict mode.',\n        StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode',\n        StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode',\n        StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode',\n        StrictReservedWord: 'Use of future reserved word in strict mode',\n        TemplateOctalLiteral: 'Octal literals are not allowed in template strings.',\n        ParameterAfterRestParameter: 'Rest parameter must be last formal parameter',\n        DefaultRestParameter: 'Unexpected token =',\n        ObjectPatternAsRestParameter: 'Unexpected token {',\n        DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals',\n        ConstructorSpecialMethod: 'Class constructor may not be an accessor',\n        DuplicateConstructor: 'A class may only have one constructor',\n        StaticPrototype: 'Classes may not have static property named prototype',\n        MissingFromClause: 'Unexpected token',\n        NoAsAfterImportNamespace: 'Unexpected token',\n        InvalidModuleSpecifier: 'Unexpected token',\n        IllegalImportDeclaration: 'Unexpected token',\n        IllegalExportDeclaration: 'Unexpected token',\n        DuplicateBinding: 'Duplicate binding %0'\n    };\n\n    // See also tools/generate-unicode-regex.js.\n    Regex = {\n        // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierStart:\n        NonAsciiIdentifierStart: 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       // ECMAScript 6/Unicode v7.0.0 NonAsciiIdentifierPart:\n        NonAsciiIdentifierPart: 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   };\n\n    // Ensure the condition is true, otherwise throw an error.\n    // This is only to have a better contract semantic, i.e. another safety net\n    // to catch a logic error. The condition shall be fulfilled in normal case.\n    // Do NOT use this to enforce a certain condition on any user input.\n\n    function assert(condition, message) {\n        /* istanbul ignore if */\n        if (!condition) {\n            throw new Error('ASSERT: ' + message);\n        }\n    }\n\n    function isDecimalDigit(ch) {\n        return (ch >= 0x30 && ch <= 0x39);   // 0..9\n    }\n\n    function isHexDigit(ch) {\n        return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;\n    }\n\n    function isOctalDigit(ch) {\n        return '01234567'.indexOf(ch) >= 0;\n    }\n\n    function octalToDecimal(ch) {\n        // \\0 is not octal escape sequence\n        var octal = (ch !== '0'), code = '01234567'.indexOf(ch);\n\n        if (index < length && isOctalDigit(source[index])) {\n            octal = true;\n            code = code * 8 + '01234567'.indexOf(source[index++]);\n\n            // 3 digits are only allowed when string starts\n            // with 0, 1, 2, 3\n            if ('0123'.indexOf(ch) >= 0 &&\n                    index < length &&\n                    isOctalDigit(source[index])) {\n                code = code * 8 + '01234567'.indexOf(source[index++]);\n            }\n        }\n\n        return {\n            code: code,\n            octal: octal\n        };\n    }\n\n    // ECMA-262 11.2 White Space\n\n    function isWhiteSpace(ch) {\n        return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) ||\n            (ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0);\n    }\n\n    // ECMA-262 11.3 Line Terminators\n\n    function isLineTerminator(ch) {\n        return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029);\n    }\n\n    // ECMA-262 11.6 Identifier Names and Identifiers\n\n    function fromCodePoint(cp) {\n        return (cp < 0x10000) ? String.fromCharCode(cp) :\n            String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) +\n            String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023));\n    }\n\n    function isIdentifierStart(ch) {\n        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)\n            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z\n            (ch >= 0x61 && ch <= 0x7A) ||         // a..z\n            (ch === 0x5C) ||                      // \\ (backslash)\n            ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch)));\n    }\n\n    function isIdentifierPart(ch) {\n        return (ch === 0x24) || (ch === 0x5F) ||  // $ (dollar) and _ (underscore)\n            (ch >= 0x41 && ch <= 0x5A) ||         // A..Z\n            (ch >= 0x61 && ch <= 0x7A) ||         // a..z\n            (ch >= 0x30 && ch <= 0x39) ||         // 0..9\n            (ch === 0x5C) ||                      // \\ (backslash)\n            ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch)));\n    }\n\n    // ECMA-262 11.6.2.2 Future Reserved Words\n\n    function isFutureReservedWord(id) {\n        switch (id) {\n        case 'enum':\n        case 'export':\n        case 'import':\n        case 'super':\n            return true;\n        default:\n            return false;\n        }\n    }\n\n    function isStrictModeReservedWord(id) {\n        switch (id) {\n        case 'implements':\n        case 'interface':\n        case 'package':\n        case 'private':\n        case 'protected':\n        case 'public':\n        case 'static':\n        case 'yield':\n        case 'let':\n            return true;\n        default:\n            return false;\n        }\n    }\n\n    function isRestrictedWord(id) {\n        return id === 'eval' || id === 'arguments';\n    }\n\n    // ECMA-262 11.6.2.1 Keywords\n\n    function isKeyword(id) {\n        switch (id.length) {\n        case 2:\n            return (id === 'if') || (id === 'in') || (id === 'do');\n        case 3:\n            return (id === 'var') || (id === 'for') || (id === 'new') ||\n                (id === 'try') || (id === 'let');\n        case 4:\n            return (id === 'this') || (id === 'else') || (id === 'case') ||\n                (id === 'void') || (id === 'with') || (id === 'enum');\n        case 5:\n            return (id === 'while') || (id === 'break') || (id === 'catch') ||\n                (id === 'throw') || (id === 'const') || (id === 'yield') ||\n                (id === 'class') || (id === 'super');\n        case 6:\n            return (id === 'return') || (id === 'typeof') || (id === 'delete') ||\n                (id === 'switch') || (id === 'export') || (id === 'import');\n        case 7:\n            return (id === 'default') || (id === 'finally') || (id === 'extends');\n        case 8:\n            return (id === 'function') || (id === 'continue') || (id === 'debugger');\n        case 10:\n            return (id === 'instanceof');\n        default:\n            return false;\n        }\n    }\n\n    // ECMA-262 11.4 Comments\n\n    function addComment(type, value, start, end, loc) {\n        var comment;\n\n        assert(typeof start === 'number', 'Comment must have valid position');\n\n        state.lastCommentStart = start;\n\n        comment = {\n            type: type,\n            value: value\n        };\n        if (extra.range) {\n            comment.range = [start, end];\n        }\n        if (extra.loc) {\n            comment.loc = loc;\n        }\n        extra.comments.push(comment);\n        if (extra.attachComment) {\n            extra.leadingComments.push(comment);\n            extra.trailingComments.push(comment);\n        }\n        if (extra.tokenize) {\n            comment.type = comment.type + 'Comment';\n            if (extra.delegate) {\n                comment = extra.delegate(comment);\n            }\n            extra.tokens.push(comment);\n        }\n    }\n\n    function skipSingleLineComment(offset) {\n        var start, loc, ch, comment;\n\n        start = index - offset;\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart - offset\n            }\n        };\n\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            ++index;\n            if (isLineTerminator(ch)) {\n                hasLineTerminator = true;\n                if (extra.comments) {\n                    comment = source.slice(start + offset, index - 1);\n                    loc.end = {\n                        line: lineNumber,\n                        column: index - lineStart - 1\n                    };\n                    addComment('Line', comment, start, index - 1, loc);\n                }\n                if (ch === 13 && source.charCodeAt(index) === 10) {\n                    ++index;\n                }\n                ++lineNumber;\n                lineStart = index;\n                return;\n            }\n        }\n\n        if (extra.comments) {\n            comment = source.slice(start + offset, index);\n            loc.end = {\n                line: lineNumber,\n                column: index - lineStart\n            };\n            addComment('Line', comment, start, index, loc);\n        }\n    }\n\n    function skipMultiLineComment() {\n        var start, loc, ch, comment;\n\n        if (extra.comments) {\n            start = index - 2;\n            loc = {\n                start: {\n                    line: lineNumber,\n                    column: index - lineStart - 2\n                }\n            };\n        }\n\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (isLineTerminator(ch)) {\n                if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) {\n                    ++index;\n                }\n                hasLineTerminator = true;\n                ++lineNumber;\n                ++index;\n                lineStart = index;\n            } else if (ch === 0x2A) {\n                // Block comment ends with '*/'.\n                if (source.charCodeAt(index + 1) === 0x2F) {\n                    ++index;\n                    ++index;\n                    if (extra.comments) {\n                        comment = source.slice(start + 2, index - 2);\n                        loc.end = {\n                            line: lineNumber,\n                            column: index - lineStart\n                        };\n                        addComment('Block', comment, start, index, loc);\n                    }\n                    return;\n                }\n                ++index;\n            } else {\n                ++index;\n            }\n        }\n\n        // Ran off the end of the file - the whole thing is a comment\n        if (extra.comments) {\n            loc.end = {\n                line: lineNumber,\n                column: index - lineStart\n            };\n            comment = source.slice(start + 2, index);\n            addComment('Block', comment, start, index, loc);\n        }\n        tolerateUnexpectedToken();\n    }\n\n    function skipComment() {\n        var ch, start;\n        hasLineTerminator = false;\n\n        start = (index === 0);\n        while (index < length) {\n            ch = source.charCodeAt(index);\n\n            if (isWhiteSpace(ch)) {\n                ++index;\n            } else if (isLineTerminator(ch)) {\n                hasLineTerminator = true;\n                ++index;\n                if (ch === 0x0D && source.charCodeAt(index) === 0x0A) {\n                    ++index;\n                }\n                ++lineNumber;\n                lineStart = index;\n                start = true;\n            } else if (ch === 0x2F) { // U+002F is '/'\n                ch = source.charCodeAt(index + 1);\n                if (ch === 0x2F) {\n                    ++index;\n                    ++index;\n                    skipSingleLineComment(2);\n                    start = true;\n                } else if (ch === 0x2A) {  // U+002A is '*'\n                    ++index;\n                    ++index;\n                    skipMultiLineComment();\n                } else {\n                    break;\n                }\n            } else if (start && ch === 0x2D) { // U+002D is '-'\n                // U+003E is '>'\n                if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) {\n                    // '-->' is a single-line comment\n                    index += 3;\n                    skipSingleLineComment(3);\n                } else {\n                    break;\n                }\n            } else if (ch === 0x3C) { // U+003C is '<'\n                if (source.slice(index + 1, index + 4) === '!--') {\n                    ++index; // `<`\n                    ++index; // `!`\n                    ++index; // `-`\n                    ++index; // `-`\n                    skipSingleLineComment(4);\n                } else {\n                    break;\n                }\n            } else {\n                break;\n            }\n        }\n    }\n\n    function scanHexEscape(prefix) {\n        var i, len, ch, code = 0;\n\n        len = (prefix === 'u') ? 4 : 2;\n        for (i = 0; i < len; ++i) {\n            if (index < length && isHexDigit(source[index])) {\n                ch = source[index++];\n                code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());\n            } else {\n                return '';\n            }\n        }\n        return String.fromCharCode(code);\n    }\n\n    function scanUnicodeCodePointEscape() {\n        var ch, code;\n\n        ch = source[index];\n        code = 0;\n\n        // At least, one hex digit is required.\n        if (ch === '}') {\n            throwUnexpectedToken();\n        }\n\n        while (index < length) {\n            ch = source[index++];\n            if (!isHexDigit(ch)) {\n                break;\n            }\n            code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());\n        }\n\n        if (code > 0x10FFFF || ch !== '}') {\n            throwUnexpectedToken();\n        }\n\n        return fromCodePoint(code);\n    }\n\n    function codePointAt(i) {\n        var cp, first, second;\n\n        cp = source.charCodeAt(i);\n        if (cp >= 0xD800 && cp <= 0xDBFF) {\n            second = source.charCodeAt(i + 1);\n            if (second >= 0xDC00 && second <= 0xDFFF) {\n                first = cp;\n                cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;\n            }\n        }\n\n        return cp;\n    }\n\n    function getComplexIdentifier() {\n        var cp, ch, id;\n\n        cp = codePointAt(index);\n        id = fromCodePoint(cp);\n        index += id.length;\n\n        // '\\u' (U+005C, U+0075) denotes an escaped character.\n        if (cp === 0x5C) {\n            if (source.charCodeAt(index) !== 0x75) {\n                throwUnexpectedToken();\n            }\n            ++index;\n            if (source[index] === '{') {\n                ++index;\n                ch = scanUnicodeCodePointEscape();\n            } else {\n                ch = scanHexEscape('u');\n                cp = ch.charCodeAt(0);\n                if (!ch || ch === '\\\\' || !isIdentifierStart(cp)) {\n                    throwUnexpectedToken();\n                }\n            }\n            id = ch;\n        }\n\n        while (index < length) {\n            cp = codePointAt(index);\n            if (!isIdentifierPart(cp)) {\n                break;\n            }\n            ch = fromCodePoint(cp);\n            id += ch;\n            index += ch.length;\n\n            // '\\u' (U+005C, U+0075) denotes an escaped character.\n            if (cp === 0x5C) {\n                id = id.substr(0, id.length - 1);\n                if (source.charCodeAt(index) !== 0x75) {\n                    throwUnexpectedToken();\n                }\n                ++index;\n                if (source[index] === '{') {\n                    ++index;\n                    ch = scanUnicodeCodePointEscape();\n                } else {\n                    ch = scanHexEscape('u');\n                    cp = ch.charCodeAt(0);\n                    if (!ch || ch === '\\\\' || !isIdentifierPart(cp)) {\n                        throwUnexpectedToken();\n                    }\n                }\n                id += ch;\n            }\n        }\n\n        return id;\n    }\n\n    function getIdentifier() {\n        var start, ch;\n\n        start = index++;\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (ch === 0x5C) {\n                // Blackslash (U+005C) marks Unicode escape sequence.\n                index = start;\n                return getComplexIdentifier();\n            } else if (ch >= 0xD800 && ch < 0xDFFF) {\n                // Need to handle surrogate pairs.\n                index = start;\n                return getComplexIdentifier();\n            }\n            if (isIdentifierPart(ch)) {\n                ++index;\n            } else {\n                break;\n            }\n        }\n\n        return source.slice(start, index);\n    }\n\n    function scanIdentifier() {\n        var start, id, type;\n\n        start = index;\n\n        // Backslash (U+005C) starts an escaped character.\n        id = (source.charCodeAt(index) === 0x5C) ? getComplexIdentifier() : getIdentifier();\n\n        // There is no keyword or literal with only one character.\n        // Thus, it must be an identifier.\n        if (id.length === 1) {\n            type = Token.Identifier;\n        } else if (isKeyword(id)) {\n            type = Token.Keyword;\n        } else if (id === 'null') {\n            type = Token.NullLiteral;\n        } else if (id === 'true' || id === 'false') {\n            type = Token.BooleanLiteral;\n        } else {\n            type = Token.Identifier;\n        }\n\n        return {\n            type: type,\n            value: id,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n\n    // ECMA-262 11.7 Punctuators\n\n    function scanPunctuator() {\n        var token, str;\n\n        token = {\n            type: Token.Punctuator,\n            value: '',\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: index,\n            end: index\n        };\n\n        // Check for most common single-character punctuators.\n        str = source[index];\n        switch (str) {\n\n        case '(':\n            if (extra.tokenize) {\n                extra.openParenToken = extra.tokenValues.length;\n            }\n            ++index;\n            break;\n\n        case '{':\n            if (extra.tokenize) {\n                extra.openCurlyToken = extra.tokenValues.length;\n            }\n            state.curlyStack.push('{');\n            ++index;\n            break;\n\n        case '.':\n            ++index;\n            if (source[index] === '.' && source[index + 1] === '.') {\n                // Spread operator: ...\n                index += 2;\n                str = '...';\n            }\n            break;\n\n        case '}':\n            ++index;\n            state.curlyStack.pop();\n            break;\n        case ')':\n        case ';':\n        case ',':\n        case '[':\n        case ']':\n        case ':':\n        case '?':\n        case '~':\n            ++index;\n            break;\n\n        default:\n            // 4-character punctuator.\n            str = source.substr(index, 4);\n            if (str === '>>>=') {\n                index += 4;\n            } else {\n\n                // 3-character punctuators.\n                str = str.substr(0, 3);\n                if (str === '===' || str === '!==' || str === '>>>' ||\n                    str === '<<=' || str === '>>=') {\n                    index += 3;\n                } else {\n\n                    // 2-character punctuators.\n                    str = str.substr(0, 2);\n                    if (str === '&&' || str === '||' || str === '==' || str === '!=' ||\n                        str === '+=' || str === '-=' || str === '*=' || str === '/=' ||\n                        str === '++' || str === '--' || str === '<<' || str === '>>' ||\n                        str === '&=' || str === '|=' || str === '^=' || str === '%=' ||\n                        str === '<=' || str === '>=' || str === '=>') {\n                        index += 2;\n                    } else {\n\n                        // 1-character punctuators.\n                        str = source[index];\n                        if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {\n                            ++index;\n                        }\n                    }\n                }\n            }\n        }\n\n        if (index === token.start) {\n            throwUnexpectedToken();\n        }\n\n        token.end = index;\n        token.value = str;\n        return token;\n    }\n\n    // ECMA-262 11.8.3 Numeric Literals\n\n    function scanHexLiteral(start) {\n        var number = '';\n\n        while (index < length) {\n            if (!isHexDigit(source[index])) {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (number.length === 0) {\n            throwUnexpectedToken();\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt('0x' + number, 16),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function scanBinaryLiteral(start) {\n        var ch, number;\n\n        number = '';\n\n        while (index < length) {\n            ch = source[index];\n            if (ch !== '0' && ch !== '1') {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (number.length === 0) {\n            // only 0b or 0B\n            throwUnexpectedToken();\n        }\n\n        if (index < length) {\n            ch = source.charCodeAt(index);\n            /* istanbul ignore else */\n            if (isIdentifierStart(ch) || isDecimalDigit(ch)) {\n                throwUnexpectedToken();\n            }\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt(number, 2),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function scanOctalLiteral(prefix, start) {\n        var number, octal;\n\n        if (isOctalDigit(prefix)) {\n            octal = true;\n            number = '0' + source[index++];\n        } else {\n            octal = false;\n            ++index;\n            number = '';\n        }\n\n        while (index < length) {\n            if (!isOctalDigit(source[index])) {\n                break;\n            }\n            number += source[index++];\n        }\n\n        if (!octal && number.length === 0) {\n            // only 0o or 0O\n            throwUnexpectedToken();\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseInt(number, 8),\n            octal: octal,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    function isImplicitOctalLiteral() {\n        var i, ch;\n\n        // Implicit octal, unless there is a non-octal digit.\n        // (Annex B.1.1 on Numeric Literals)\n        for (i = index + 1; i < length; ++i) {\n            ch = source[i];\n            if (ch === '8' || ch === '9') {\n                return false;\n            }\n            if (!isOctalDigit(ch)) {\n                return true;\n            }\n        }\n\n        return true;\n    }\n\n    function scanNumericLiteral() {\n        var number, start, ch;\n\n        ch = source[index];\n        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),\n            'Numeric literal must start with a decimal digit or a decimal point');\n\n        start = index;\n        number = '';\n        if (ch !== '.') {\n            number = source[index++];\n            ch = source[index];\n\n            // Hex number starts with '0x'.\n            // Octal number starts with '0'.\n            // Octal number in ES6 starts with '0o'.\n            // Binary number in ES6 starts with '0b'.\n            if (number === '0') {\n                if (ch === 'x' || ch === 'X') {\n                    ++index;\n                    return scanHexLiteral(start);\n                }\n                if (ch === 'b' || ch === 'B') {\n                    ++index;\n                    return scanBinaryLiteral(start);\n                }\n                if (ch === 'o' || ch === 'O') {\n                    return scanOctalLiteral(ch, start);\n                }\n\n                if (isOctalDigit(ch)) {\n                    if (isImplicitOctalLiteral()) {\n                        return scanOctalLiteral(ch, start);\n                    }\n                }\n            }\n\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === '.') {\n            number += source[index++];\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === 'e' || ch === 'E') {\n            number += source[index++];\n\n            ch = source[index];\n            if (ch === '+' || ch === '-') {\n                number += source[index++];\n            }\n            if (isDecimalDigit(source.charCodeAt(index))) {\n                while (isDecimalDigit(source.charCodeAt(index))) {\n                    number += source[index++];\n                }\n            } else {\n                throwUnexpectedToken();\n            }\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseFloat(number),\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.4 String Literals\n\n    function scanStringLiteral() {\n        var str = '', quote, start, ch, unescaped, octToDec, octal = false;\n\n        quote = source[index];\n        assert((quote === '\\'' || quote === '\"'),\n            'String literal must starts with a quote');\n\n        start = index;\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n\n            if (ch === quote) {\n                quote = '';\n                break;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'u':\n                    case 'x':\n                        if (source[index] === '{') {\n                            ++index;\n                            str += scanUnicodeCodePointEscape();\n                        } else {\n                            unescaped = scanHexEscape(ch);\n                            if (!unescaped) {\n                                throw throwUnexpectedToken();\n                            }\n                            str += unescaped;\n                        }\n                        break;\n                    case 'n':\n                        str += '\\n';\n                        break;\n                    case 'r':\n                        str += '\\r';\n                        break;\n                    case 't':\n                        str += '\\t';\n                        break;\n                    case 'b':\n                        str += '\\b';\n                        break;\n                    case 'f':\n                        str += '\\f';\n                        break;\n                    case 'v':\n                        str += '\\x0B';\n                        break;\n                    case '8':\n                    case '9':\n                        str += ch;\n                        tolerateUnexpectedToken();\n                        break;\n\n                    default:\n                        if (isOctalDigit(ch)) {\n                            octToDec = octalToDecimal(ch);\n\n                            octal = octToDec.octal || octal;\n                            str += String.fromCharCode(octToDec.code);\n                        } else {\n                            str += ch;\n                        }\n                        break;\n                    }\n                } else {\n                    ++lineNumber;\n                    if (ch === '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                    lineStart = index;\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                break;\n            } else {\n                str += ch;\n            }\n        }\n\n        if (quote !== '') {\n            throwUnexpectedToken();\n        }\n\n        return {\n            type: Token.StringLiteral,\n            value: str,\n            octal: octal,\n            lineNumber: startLineNumber,\n            lineStart: startLineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.6 Template Literal Lexical Components\n\n    function scanTemplate() {\n        var cooked = '', ch, start, rawOffset, terminated, head, tail, restore, unescaped;\n\n        terminated = false;\n        tail = false;\n        start = index;\n        head = (source[index] === '`');\n        rawOffset = 2;\n\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n            if (ch === '`') {\n                rawOffset = 1;\n                tail = true;\n                terminated = true;\n                break;\n            } else if (ch === '$') {\n                if (source[index] === '{') {\n                    state.curlyStack.push('${');\n                    ++index;\n                    terminated = true;\n                    break;\n                }\n                cooked += ch;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'n':\n                        cooked += '\\n';\n                        break;\n                    case 'r':\n                        cooked += '\\r';\n                        break;\n                    case 't':\n                        cooked += '\\t';\n                        break;\n                    case 'u':\n                    case 'x':\n                        if (source[index] === '{') {\n                            ++index;\n                            cooked += scanUnicodeCodePointEscape();\n                        } else {\n                            restore = index;\n                            unescaped = scanHexEscape(ch);\n                            if (unescaped) {\n                                cooked += unescaped;\n                            } else {\n                                index = restore;\n                                cooked += ch;\n                            }\n                        }\n                        break;\n                    case 'b':\n                        cooked += '\\b';\n                        break;\n                    case 'f':\n                        cooked += '\\f';\n                        break;\n                    case 'v':\n                        cooked += '\\v';\n                        break;\n\n                    default:\n                        if (ch === '0') {\n                            if (isDecimalDigit(source.charCodeAt(index))) {\n                                // Illegal: \\01 \\02 and so on\n                                throwError(Messages.TemplateOctalLiteral);\n                            }\n                            cooked += '\\0';\n                        } else if (isOctalDigit(ch)) {\n                            // Illegal: \\1 \\2\n                            throwError(Messages.TemplateOctalLiteral);\n                        } else {\n                            cooked += ch;\n                        }\n                        break;\n                    }\n                } else {\n                    ++lineNumber;\n                    if (ch === '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                    lineStart = index;\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                ++lineNumber;\n                if (ch === '\\r' && source[index] === '\\n') {\n                    ++index;\n                }\n                lineStart = index;\n                cooked += '\\n';\n            } else {\n                cooked += ch;\n            }\n        }\n\n        if (!terminated) {\n            throwUnexpectedToken();\n        }\n\n        if (!head) {\n            state.curlyStack.pop();\n        }\n\n        return {\n            type: Token.Template,\n            value: {\n                cooked: cooked,\n                raw: source.slice(start + 1, index - rawOffset)\n            },\n            head: head,\n            tail: tail,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            start: start,\n            end: index\n        };\n    }\n\n    // ECMA-262 11.8.5 Regular Expression Literals\n\n    function testRegExp(pattern, flags) {\n        // The BMP character to use as a replacement for astral symbols when\n        // translating an ES6 \"u\"-flagged pattern to an ES5-compatible\n        // approximation.\n        // Note: replacing with '\\uFFFF' enables false positives in unlikely\n        // scenarios. For example, `[\\u{1044f}-\\u{10440}]` is an invalid\n        // pattern that would not be detected by this substitution.\n        var astralSubstitute = '\\uFFFF',\n            tmp = pattern;\n\n        if (flags.indexOf('u') >= 0) {\n            tmp = tmp\n                // Replace every Unicode escape sequence with the equivalent\n                // BMP character or a constant ASCII code point in the case of\n                // astral symbols. (See the above note on `astralSubstitute`\n                // for more information.)\n                .replace(/\\\\u\\{([0-9a-fA-F]+)\\}|\\\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) {\n                    var codePoint = parseInt($1 || $2, 16);\n                    if (codePoint > 0x10FFFF) {\n                        throwUnexpectedToken(null, Messages.InvalidRegExp);\n                    }\n                    if (codePoint <= 0xFFFF) {\n                        return String.fromCharCode(codePoint);\n                    }\n                    return astralSubstitute;\n                })\n                // Replace each paired surrogate with a single ASCII symbol to\n                // avoid throwing on regular expressions that are only valid in\n                // combination with the \"u\" flag.\n                .replace(\n                    /[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]/g,\n                    astralSubstitute\n                );\n        }\n\n        // First, detect invalid regular expressions.\n        try {\n            RegExp(tmp);\n        } catch (e) {\n            throwUnexpectedToken(null, Messages.InvalidRegExp);\n        }\n\n        // Return a regular expression object for this pattern-flag pair, or\n        // `null` in case the current environment doesn't support the flags it\n        // uses.\n        try {\n            return new RegExp(pattern, flags);\n        } catch (exception) {\n            return null;\n        }\n    }\n\n    function scanRegExpBody() {\n        var ch, str, classMarker, terminated, body;\n\n        ch = source[index];\n        assert(ch === '/', 'Regular expression literal must start with a slash');\n        str = source[index++];\n\n        classMarker = false;\n        terminated = false;\n        while (index < length) {\n            ch = source[index++];\n            str += ch;\n            if (ch === '\\\\') {\n                ch = source[index++];\n                // ECMA-262 7.8.5\n                if (isLineTerminator(ch.charCodeAt(0))) {\n                    throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n                }\n                str += ch;\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n            } else if (classMarker) {\n                if (ch === ']') {\n                    classMarker = false;\n                }\n            } else {\n                if (ch === '/') {\n                    terminated = true;\n                    break;\n                } else if (ch === '[') {\n                    classMarker = true;\n                }\n            }\n        }\n\n        if (!terminated) {\n            throwUnexpectedToken(null, Messages.UnterminatedRegExp);\n        }\n\n        // Exclude leading and trailing slash.\n        body = str.substr(1, str.length - 2);\n        return {\n            value: body,\n            literal: str\n        };\n    }\n\n    function scanRegExpFlags() {\n        var ch, str, flags, restore;\n\n        str = '';\n        flags = '';\n        while (index < length) {\n            ch = source[index];\n            if (!isIdentifierPart(ch.charCodeAt(0))) {\n                break;\n            }\n\n            ++index;\n            if (ch === '\\\\' && index < length) {\n                ch = source[index];\n                if (ch === 'u') {\n                    ++index;\n                    restore = index;\n                    ch = scanHexEscape('u');\n                    if (ch) {\n                        flags += ch;\n                        for (str += '\\\\u'; restore < index; ++restore) {\n                            str += source[restore];\n                        }\n                    } else {\n                        index = restore;\n                        flags += 'u';\n                        str += '\\\\u';\n                    }\n                    tolerateUnexpectedToken();\n                } else {\n                    str += '\\\\';\n                    tolerateUnexpectedToken();\n                }\n            } else {\n                flags += ch;\n                str += ch;\n            }\n        }\n\n        return {\n            value: flags,\n            literal: str\n        };\n    }\n\n    function scanRegExp() {\n        var start, body, flags, value;\n        scanning = true;\n\n        lookahead = null;\n        skipComment();\n        start = index;\n\n        body = scanRegExpBody();\n        flags = scanRegExpFlags();\n        value = testRegExp(body.value, flags.value);\n        scanning = false;\n        if (extra.tokenize) {\n            return {\n                type: Token.RegularExpression,\n                value: value,\n                regex: {\n                    pattern: body.value,\n                    flags: flags.value\n                },\n                lineNumber: lineNumber,\n                lineStart: lineStart,\n                start: start,\n                end: index\n            };\n        }\n\n        return {\n            literal: body.literal + flags.literal,\n            value: value,\n            regex: {\n                pattern: body.value,\n                flags: flags.value\n            },\n            start: start,\n            end: index\n        };\n    }\n\n    function collectRegex() {\n        var pos, loc, regex, token;\n\n        skipComment();\n\n        pos = index;\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart\n            }\n        };\n\n        regex = scanRegExp();\n\n        loc.end = {\n            line: lineNumber,\n            column: index - lineStart\n        };\n\n        /* istanbul ignore next */\n        if (!extra.tokenize) {\n            // Pop the previous token, which is likely '/' or '/='\n            if (extra.tokens.length > 0) {\n                token = extra.tokens[extra.tokens.length - 1];\n                if (token.range[0] === pos && token.type === 'Punctuator') {\n                    if (token.value === '/' || token.value === '/=') {\n                        extra.tokens.pop();\n                    }\n                }\n            }\n\n            extra.tokens.push({\n                type: 'RegularExpression',\n                value: regex.literal,\n                regex: regex.regex,\n                range: [pos, index],\n                loc: loc\n            });\n        }\n\n        return regex;\n    }\n\n    function isIdentifierName(token) {\n        return token.type === Token.Identifier ||\n            token.type === Token.Keyword ||\n            token.type === Token.BooleanLiteral ||\n            token.type === Token.NullLiteral;\n    }\n\n    // Using the following algorithm:\n    // https://github.com/mozilla/sweet.js/wiki/design\n\n    function advanceSlash() {\n        var regex, previous, check;\n\n        function testKeyword(value) {\n            return value && (value.length > 1) && (value[0] >= 'a') && (value[0] <= 'z');\n        }\n\n        previous = extra.tokenValues[extra.tokens.length - 1];\n        regex = (previous !== null);\n\n        switch (previous) {\n        case 'this':\n        case ']':\n            regex = false;\n            break;\n\n        case ')':\n            check = extra.tokenValues[extra.openParenToken - 1];\n            regex = (check === 'if' || check === 'while' || check === 'for' || check === 'with');\n            break;\n\n        case '}':\n            // Dividing a function by anything makes little sense,\n            // but we have to check for that.\n            regex = false;\n            if (testKeyword(extra.tokenValues[extra.openCurlyToken - 3])) {\n                // Anonymous function, e.g. function(){} /42\n                check = extra.tokenValues[extra.openCurlyToken - 4];\n                regex = check ? (FnExprTokens.indexOf(check) < 0) : false;\n            } else if (testKeyword(extra.tokenValues[extra.openCurlyToken - 4])) {\n                // Named function, e.g. function f(){} /42/\n                check = extra.tokenValues[extra.openCurlyToken - 5];\n                regex = check ? (FnExprTokens.indexOf(check) < 0) : true;\n            }\n        }\n\n        return regex ? collectRegex() : scanPunctuator();\n    }\n\n    function advance() {\n        var cp, token;\n\n        if (index >= length) {\n            return {\n                type: Token.EOF,\n                lineNumber: lineNumber,\n                lineStart: lineStart,\n                start: index,\n                end: index\n            };\n        }\n\n        cp = source.charCodeAt(index);\n\n        if (isIdentifierStart(cp)) {\n            token = scanIdentifier();\n            if (strict && isStrictModeReservedWord(token.value)) {\n                token.type = Token.Keyword;\n            }\n            return token;\n        }\n\n        // Very common: ( and ) and ;\n        if (cp === 0x28 || cp === 0x29 || cp === 0x3B) {\n            return scanPunctuator();\n        }\n\n        // String literal starts with single quote (U+0027) or double quote (U+0022).\n        if (cp === 0x27 || cp === 0x22) {\n            return scanStringLiteral();\n        }\n\n        // Dot (.) U+002E can also start a floating-point number, hence the need\n        // to check the next character.\n        if (cp === 0x2E) {\n            if (isDecimalDigit(source.charCodeAt(index + 1))) {\n                return scanNumericLiteral();\n            }\n            return scanPunctuator();\n        }\n\n        if (isDecimalDigit(cp)) {\n            return scanNumericLiteral();\n        }\n\n        // Slash (/) U+002F can also start a regex.\n        if (extra.tokenize && cp === 0x2F) {\n            return advanceSlash();\n        }\n\n        // Template literals start with ` (U+0060) for template head\n        // or } (U+007D) for template middle or template tail.\n        if (cp === 0x60 || (cp === 0x7D && state.curlyStack[state.curlyStack.length - 1] === '${')) {\n            return scanTemplate();\n        }\n\n        // Possible identifier start in a surrogate pair.\n        if (cp >= 0xD800 && cp < 0xDFFF) {\n            cp = codePointAt(index);\n            if (isIdentifierStart(cp)) {\n                return scanIdentifier();\n            }\n        }\n\n        return scanPunctuator();\n    }\n\n    function collectToken() {\n        var loc, token, value, entry;\n\n        loc = {\n            start: {\n                line: lineNumber,\n                column: index - lineStart\n            }\n        };\n\n        token = advance();\n        loc.end = {\n            line: lineNumber,\n            column: index - lineStart\n        };\n\n        if (token.type !== Token.EOF) {\n            value = source.slice(token.start, token.end);\n            entry = {\n                type: TokenName[token.type],\n                value: value,\n                range: [token.start, token.end],\n                loc: loc\n            };\n            if (token.regex) {\n                entry.regex = {\n                    pattern: token.regex.pattern,\n                    flags: token.regex.flags\n                };\n            }\n            if (extra.tokenValues) {\n                extra.tokenValues.push((entry.type === 'Punctuator' || entry.type === 'Keyword') ? entry.value : null);\n            }\n            if (extra.tokenize) {\n                if (!extra.range) {\n                    delete entry.range;\n                }\n                if (!extra.loc) {\n                    delete entry.loc;\n                }\n                if (extra.delegate) {\n                    entry = extra.delegate(entry);\n                }\n            }\n            extra.tokens.push(entry);\n        }\n\n        return token;\n    }\n\n    function lex() {\n        var token;\n        scanning = true;\n\n        lastIndex = index;\n        lastLineNumber = lineNumber;\n        lastLineStart = lineStart;\n\n        skipComment();\n\n        token = lookahead;\n\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n\n        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();\n        scanning = false;\n        return token;\n    }\n\n    function peek() {\n        scanning = true;\n\n        skipComment();\n\n        lastIndex = index;\n        lastLineNumber = lineNumber;\n        lastLineStart = lineStart;\n\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n\n        lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance();\n        scanning = false;\n    }\n\n    function Position() {\n        this.line = startLineNumber;\n        this.column = startIndex - startLineStart;\n    }\n\n    function SourceLocation() {\n        this.start = new Position();\n        this.end = null;\n    }\n\n    function WrappingSourceLocation(startToken) {\n        this.start = {\n            line: startToken.lineNumber,\n            column: startToken.start - startToken.lineStart\n        };\n        this.end = null;\n    }\n\n    function Node() {\n        if (extra.range) {\n            this.range = [startIndex, 0];\n        }\n        if (extra.loc) {\n            this.loc = new SourceLocation();\n        }\n    }\n\n    function WrappingNode(startToken) {\n        if (extra.range) {\n            this.range = [startToken.start, 0];\n        }\n        if (extra.loc) {\n            this.loc = new WrappingSourceLocation(startToken);\n        }\n    }\n\n    WrappingNode.prototype = Node.prototype = {\n\n        processComment: function () {\n            var lastChild,\n                innerComments,\n                leadingComments,\n                trailingComments,\n                bottomRight = extra.bottomRightStack,\n                i,\n                comment,\n                last = bottomRight[bottomRight.length - 1];\n\n            if (this.type === Syntax.Program) {\n                if (this.body.length > 0) {\n                    return;\n                }\n            }\n            /**\n             * patch innnerComments for properties empty block\n             * `function a() {/** comments **\\/}`\n             */\n\n            if (this.type === Syntax.BlockStatement && this.body.length === 0) {\n                innerComments = [];\n                for (i = extra.leadingComments.length - 1; i >= 0; --i) {\n                    comment = extra.leadingComments[i];\n                    if (this.range[1] >= comment.range[1]) {\n                        innerComments.unshift(comment);\n                        extra.leadingComments.splice(i, 1);\n                        extra.trailingComments.splice(i, 1);\n                    }\n                }\n                if (innerComments.length) {\n                    this.innerComments = innerComments;\n                    //bottomRight.push(this);\n                    return;\n                }\n            }\n\n            if (extra.trailingComments.length > 0) {\n                trailingComments = [];\n                for (i = extra.trailingComments.length - 1; i >= 0; --i) {\n                    comment = extra.trailingComments[i];\n                    if (comment.range[0] >= this.range[1]) {\n                        trailingComments.unshift(comment);\n                        extra.trailingComments.splice(i, 1);\n                    }\n                }\n                extra.trailingComments = [];\n            } else {\n                if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) {\n                    trailingComments = last.trailingComments;\n                    delete last.trailingComments;\n                }\n            }\n\n            // Eating the stack.\n            while (last && last.range[0] >= this.range[0]) {\n                lastChild = bottomRight.pop();\n                last = bottomRight[bottomRight.length - 1];\n            }\n\n            if (lastChild) {\n                if (lastChild.leadingComments) {\n                    leadingComments = [];\n                    for (i = lastChild.leadingComments.length - 1; i >= 0; --i) {\n                        comment = lastChild.leadingComments[i];\n                        if (comment.range[1] <= this.range[0]) {\n                            leadingComments.unshift(comment);\n                            lastChild.leadingComments.splice(i, 1);\n                        }\n                    }\n\n                    if (!lastChild.leadingComments.length) {\n                        lastChild.leadingComments = undefined;\n                    }\n                }\n            } else if (extra.leadingComments.length > 0) {\n                leadingComments = [];\n                for (i = extra.leadingComments.length - 1; i >= 0; --i) {\n                    comment = extra.leadingComments[i];\n                    if (comment.range[1] <= this.range[0]) {\n                        leadingComments.unshift(comment);\n                        extra.leadingComments.splice(i, 1);\n                    }\n                }\n            }\n\n\n            if (leadingComments && leadingComments.length > 0) {\n                this.leadingComments = leadingComments;\n            }\n            if (trailingComments && trailingComments.length > 0) {\n                this.trailingComments = trailingComments;\n            }\n\n            bottomRight.push(this);\n        },\n\n        finish: function () {\n            if (extra.range) {\n                this.range[1] = lastIndex;\n            }\n            if (extra.loc) {\n                this.loc.end = {\n                    line: lastLineNumber,\n                    column: lastIndex - lastLineStart\n                };\n                if (extra.source) {\n                    this.loc.source = extra.source;\n                }\n            }\n\n            if (extra.attachComment) {\n                this.processComment();\n            }\n        },\n\n        finishArrayExpression: function (elements) {\n            this.type = Syntax.ArrayExpression;\n            this.elements = elements;\n            this.finish();\n            return this;\n        },\n\n        finishArrayPattern: function (elements) {\n            this.type = Syntax.ArrayPattern;\n            this.elements = elements;\n            this.finish();\n            return this;\n        },\n\n        finishArrowFunctionExpression: function (params, defaults, body, expression) {\n            this.type = Syntax.ArrowFunctionExpression;\n            this.id = null;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = false;\n            this.expression = expression;\n            this.finish();\n            return this;\n        },\n\n        finishAssignmentExpression: function (operator, left, right) {\n            this.type = Syntax.AssignmentExpression;\n            this.operator = operator;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishAssignmentPattern: function (left, right) {\n            this.type = Syntax.AssignmentPattern;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishBinaryExpression: function (operator, left, right) {\n            this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression;\n            this.operator = operator;\n            this.left = left;\n            this.right = right;\n            this.finish();\n            return this;\n        },\n\n        finishBlockStatement: function (body) {\n            this.type = Syntax.BlockStatement;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishBreakStatement: function (label) {\n            this.type = Syntax.BreakStatement;\n            this.label = label;\n            this.finish();\n            return this;\n        },\n\n        finishCallExpression: function (callee, args) {\n            this.type = Syntax.CallExpression;\n            this.callee = callee;\n            this.arguments = args;\n            this.finish();\n            return this;\n        },\n\n        finishCatchClause: function (param, body) {\n            this.type = Syntax.CatchClause;\n            this.param = param;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassBody: function (body) {\n            this.type = Syntax.ClassBody;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassDeclaration: function (id, superClass, body) {\n            this.type = Syntax.ClassDeclaration;\n            this.id = id;\n            this.superClass = superClass;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishClassExpression: function (id, superClass, body) {\n            this.type = Syntax.ClassExpression;\n            this.id = id;\n            this.superClass = superClass;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishConditionalExpression: function (test, consequent, alternate) {\n            this.type = Syntax.ConditionalExpression;\n            this.test = test;\n            this.consequent = consequent;\n            this.alternate = alternate;\n            this.finish();\n            return this;\n        },\n\n        finishContinueStatement: function (label) {\n            this.type = Syntax.ContinueStatement;\n            this.label = label;\n            this.finish();\n            return this;\n        },\n\n        finishDebuggerStatement: function () {\n            this.type = Syntax.DebuggerStatement;\n            this.finish();\n            return this;\n        },\n\n        finishDoWhileStatement: function (body, test) {\n            this.type = Syntax.DoWhileStatement;\n            this.body = body;\n            this.test = test;\n            this.finish();\n            return this;\n        },\n\n        finishEmptyStatement: function () {\n            this.type = Syntax.EmptyStatement;\n            this.finish();\n            return this;\n        },\n\n        finishExpressionStatement: function (expression) {\n            this.type = Syntax.ExpressionStatement;\n            this.expression = expression;\n            this.finish();\n            return this;\n        },\n\n        finishForStatement: function (init, test, update, body) {\n            this.type = Syntax.ForStatement;\n            this.init = init;\n            this.test = test;\n            this.update = update;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishForOfStatement: function (left, right, body) {\n            this.type = Syntax.ForOfStatement;\n            this.left = left;\n            this.right = right;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishForInStatement: function (left, right, body) {\n            this.type = Syntax.ForInStatement;\n            this.left = left;\n            this.right = right;\n            this.body = body;\n            this.each = false;\n            this.finish();\n            return this;\n        },\n\n        finishFunctionDeclaration: function (id, params, defaults, body, generator) {\n            this.type = Syntax.FunctionDeclaration;\n            this.id = id;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = generator;\n            this.expression = false;\n            this.finish();\n            return this;\n        },\n\n        finishFunctionExpression: function (id, params, defaults, body, generator) {\n            this.type = Syntax.FunctionExpression;\n            this.id = id;\n            this.params = params;\n            this.defaults = defaults;\n            this.body = body;\n            this.generator = generator;\n            this.expression = false;\n            this.finish();\n            return this;\n        },\n\n        finishIdentifier: function (name) {\n            this.type = Syntax.Identifier;\n            this.name = name;\n            this.finish();\n            return this;\n        },\n\n        finishIfStatement: function (test, consequent, alternate) {\n            this.type = Syntax.IfStatement;\n            this.test = test;\n            this.consequent = consequent;\n            this.alternate = alternate;\n            this.finish();\n            return this;\n        },\n\n        finishLabeledStatement: function (label, body) {\n            this.type = Syntax.LabeledStatement;\n            this.label = label;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishLiteral: function (token) {\n            this.type = Syntax.Literal;\n            this.value = token.value;\n            this.raw = source.slice(token.start, token.end);\n            if (token.regex) {\n                this.regex = token.regex;\n            }\n            this.finish();\n            return this;\n        },\n\n        finishMemberExpression: function (accessor, object, property) {\n            this.type = Syntax.MemberExpression;\n            this.computed = accessor === '[';\n            this.object = object;\n            this.property = property;\n            this.finish();\n            return this;\n        },\n\n        finishMetaProperty: function (meta, property) {\n            this.type = Syntax.MetaProperty;\n            this.meta = meta;\n            this.property = property;\n            this.finish();\n            return this;\n        },\n\n        finishNewExpression: function (callee, args) {\n            this.type = Syntax.NewExpression;\n            this.callee = callee;\n            this.arguments = args;\n            this.finish();\n            return this;\n        },\n\n        finishObjectExpression: function (properties) {\n            this.type = Syntax.ObjectExpression;\n            this.properties = properties;\n            this.finish();\n            return this;\n        },\n\n        finishObjectPattern: function (properties) {\n            this.type = Syntax.ObjectPattern;\n            this.properties = properties;\n            this.finish();\n            return this;\n        },\n\n        finishPostfixExpression: function (operator, argument) {\n            this.type = Syntax.UpdateExpression;\n            this.operator = operator;\n            this.argument = argument;\n            this.prefix = false;\n            this.finish();\n            return this;\n        },\n\n        finishProgram: function (body, sourceType) {\n            this.type = Syntax.Program;\n            this.body = body;\n            this.sourceType = sourceType;\n            this.finish();\n            return this;\n        },\n\n        finishProperty: function (kind, key, computed, value, method, shorthand) {\n            this.type = Syntax.Property;\n            this.key = key;\n            this.computed = computed;\n            this.value = value;\n            this.kind = kind;\n            this.method = method;\n            this.shorthand = shorthand;\n            this.finish();\n            return this;\n        },\n\n        finishRestElement: function (argument) {\n            this.type = Syntax.RestElement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishReturnStatement: function (argument) {\n            this.type = Syntax.ReturnStatement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishSequenceExpression: function (expressions) {\n            this.type = Syntax.SequenceExpression;\n            this.expressions = expressions;\n            this.finish();\n            return this;\n        },\n\n        finishSpreadElement: function (argument) {\n            this.type = Syntax.SpreadElement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishSwitchCase: function (test, consequent) {\n            this.type = Syntax.SwitchCase;\n            this.test = test;\n            this.consequent = consequent;\n            this.finish();\n            return this;\n        },\n\n        finishSuper: function () {\n            this.type = Syntax.Super;\n            this.finish();\n            return this;\n        },\n\n        finishSwitchStatement: function (discriminant, cases) {\n            this.type = Syntax.SwitchStatement;\n            this.discriminant = discriminant;\n            this.cases = cases;\n            this.finish();\n            return this;\n        },\n\n        finishTaggedTemplateExpression: function (tag, quasi) {\n            this.type = Syntax.TaggedTemplateExpression;\n            this.tag = tag;\n            this.quasi = quasi;\n            this.finish();\n            return this;\n        },\n\n        finishTemplateElement: function (value, tail) {\n            this.type = Syntax.TemplateElement;\n            this.value = value;\n            this.tail = tail;\n            this.finish();\n            return this;\n        },\n\n        finishTemplateLiteral: function (quasis, expressions) {\n            this.type = Syntax.TemplateLiteral;\n            this.quasis = quasis;\n            this.expressions = expressions;\n            this.finish();\n            return this;\n        },\n\n        finishThisExpression: function () {\n            this.type = Syntax.ThisExpression;\n            this.finish();\n            return this;\n        },\n\n        finishThrowStatement: function (argument) {\n            this.type = Syntax.ThrowStatement;\n            this.argument = argument;\n            this.finish();\n            return this;\n        },\n\n        finishTryStatement: function (block, handler, finalizer) {\n            this.type = Syntax.TryStatement;\n            this.block = block;\n            this.guardedHandlers = [];\n            this.handlers = handler ? [handler] : [];\n            this.handler = handler;\n            this.finalizer = finalizer;\n            this.finish();\n            return this;\n        },\n\n        finishUnaryExpression: function (operator, argument) {\n            this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression;\n            this.operator = operator;\n            this.argument = argument;\n            this.prefix = true;\n            this.finish();\n            return this;\n        },\n\n        finishVariableDeclaration: function (declarations) {\n            this.type = Syntax.VariableDeclaration;\n            this.declarations = declarations;\n            this.kind = 'var';\n            this.finish();\n            return this;\n        },\n\n        finishLexicalDeclaration: function (declarations, kind) {\n            this.type = Syntax.VariableDeclaration;\n            this.declarations = declarations;\n            this.kind = kind;\n            this.finish();\n            return this;\n        },\n\n        finishVariableDeclarator: function (id, init) {\n            this.type = Syntax.VariableDeclarator;\n            this.id = id;\n            this.init = init;\n            this.finish();\n            return this;\n        },\n\n        finishWhileStatement: function (test, body) {\n            this.type = Syntax.WhileStatement;\n            this.test = test;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishWithStatement: function (object, body) {\n            this.type = Syntax.WithStatement;\n            this.object = object;\n            this.body = body;\n            this.finish();\n            return this;\n        },\n\n        finishExportSpecifier: function (local, exported) {\n            this.type = Syntax.ExportSpecifier;\n            this.exported = exported || local;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishImportDefaultSpecifier: function (local) {\n            this.type = Syntax.ImportDefaultSpecifier;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishImportNamespaceSpecifier: function (local) {\n            this.type = Syntax.ImportNamespaceSpecifier;\n            this.local = local;\n            this.finish();\n            return this;\n        },\n\n        finishExportNamedDeclaration: function (declaration, specifiers, src) {\n            this.type = Syntax.ExportNamedDeclaration;\n            this.declaration = declaration;\n            this.specifiers = specifiers;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishExportDefaultDeclaration: function (declaration) {\n            this.type = Syntax.ExportDefaultDeclaration;\n            this.declaration = declaration;\n            this.finish();\n            return this;\n        },\n\n        finishExportAllDeclaration: function (src) {\n            this.type = Syntax.ExportAllDeclaration;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishImportSpecifier: function (local, imported) {\n            this.type = Syntax.ImportSpecifier;\n            this.local = local || imported;\n            this.imported = imported;\n            this.finish();\n            return this;\n        },\n\n        finishImportDeclaration: function (specifiers, src) {\n            this.type = Syntax.ImportDeclaration;\n            this.specifiers = specifiers;\n            this.source = src;\n            this.finish();\n            return this;\n        },\n\n        finishYieldExpression: function (argument, delegate) {\n            this.type = Syntax.YieldExpression;\n            this.argument = argument;\n            this.delegate = delegate;\n            this.finish();\n            return this;\n        }\n    };\n\n\n    function recordError(error) {\n        var e, existing;\n\n        for (e = 0; e < extra.errors.length; e++) {\n            existing = extra.errors[e];\n            // Prevent duplicated error.\n            /* istanbul ignore next */\n            if (existing.index === error.index && existing.message === error.message) {\n                return;\n            }\n        }\n\n        extra.errors.push(error);\n    }\n\n    function constructError(msg, column) {\n        var error = new Error(msg);\n        try {\n            throw error;\n        } catch (base) {\n            /* istanbul ignore else */\n            if (Object.create && Object.defineProperty) {\n                error = Object.create(base);\n                Object.defineProperty(error, 'column', { value: column });\n            }\n        } finally {\n            return error;\n        }\n    }\n\n    function createError(line, pos, description) {\n        var msg, column, error;\n\n        msg = 'Line ' + line + ': ' + description;\n        column = pos - (scanning ? lineStart : lastLineStart) + 1;\n        error = constructError(msg, column);\n        error.lineNumber = line;\n        error.description = description;\n        error.index = pos;\n        return error;\n    }\n\n    // Throw an exception\n\n    function throwError(messageFormat) {\n        var args, msg;\n\n        args = Array.prototype.slice.call(arguments, 1);\n        msg = messageFormat.replace(/%(\\d)/g,\n            function (whole, idx) {\n                assert(idx < args.length, 'Message reference must be in range');\n                return args[idx];\n            }\n        );\n\n        throw createError(lastLineNumber, lastIndex, msg);\n    }\n\n    function tolerateError(messageFormat) {\n        var args, msg, error;\n\n        args = Array.prototype.slice.call(arguments, 1);\n        /* istanbul ignore next */\n        msg = messageFormat.replace(/%(\\d)/g,\n            function (whole, idx) {\n                assert(idx < args.length, 'Message reference must be in range');\n                return args[idx];\n            }\n        );\n\n        error = createError(lineNumber, lastIndex, msg);\n        if (extra.errors) {\n            recordError(error);\n        } else {\n            throw error;\n        }\n    }\n\n    // Throw an exception because of the token.\n\n    function unexpectedTokenError(token, message) {\n        var value, msg = message || Messages.UnexpectedToken;\n\n        if (token) {\n            if (!message) {\n                msg = (token.type === Token.EOF) ? Messages.UnexpectedEOS :\n                    (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier :\n                    (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber :\n                    (token.type === Token.StringLiteral) ? Messages.UnexpectedString :\n                    (token.type === Token.Template) ? Messages.UnexpectedTemplate :\n                    Messages.UnexpectedToken;\n\n                if (token.type === Token.Keyword) {\n                    if (isFutureReservedWord(token.value)) {\n                        msg = Messages.UnexpectedReserved;\n                    } else if (strict && isStrictModeReservedWord(token.value)) {\n                        msg = Messages.StrictReservedWord;\n                    }\n                }\n            }\n\n            value = (token.type === Token.Template) ? token.value.raw : token.value;\n        } else {\n            value = 'ILLEGAL';\n        }\n\n        msg = msg.replace('%0', value);\n\n        return (token && typeof token.lineNumber === 'number') ?\n            createError(token.lineNumber, token.start, msg) :\n            createError(scanning ? lineNumber : lastLineNumber, scanning ? index : lastIndex, msg);\n    }\n\n    function throwUnexpectedToken(token, message) {\n        throw unexpectedTokenError(token, message);\n    }\n\n    function tolerateUnexpectedToken(token, message) {\n        var error = unexpectedTokenError(token, message);\n        if (extra.errors) {\n            recordError(error);\n        } else {\n            throw error;\n        }\n    }\n\n    // Expect the next token to match the specified punctuator.\n    // If not, an exception will be thrown.\n\n    function expect(value) {\n        var token = lex();\n        if (token.type !== Token.Punctuator || token.value !== value) {\n            throwUnexpectedToken(token);\n        }\n    }\n\n    /**\n     * @name expectCommaSeparator\n     * @description Quietly expect a comma when in tolerant mode, otherwise delegates\n     * to <code>expect(value)</code>\n     * @since 2.0\n     */\n    function expectCommaSeparator() {\n        var token;\n\n        if (extra.errors) {\n            token = lookahead;\n            if (token.type === Token.Punctuator && token.value === ',') {\n                lex();\n            } else if (token.type === Token.Punctuator && token.value === ';') {\n                lex();\n                tolerateUnexpectedToken(token);\n            } else {\n                tolerateUnexpectedToken(token, Messages.UnexpectedToken);\n            }\n        } else {\n            expect(',');\n        }\n    }\n\n    // Expect the next token to match the specified keyword.\n    // If not, an exception will be thrown.\n\n    function expectKeyword(keyword) {\n        var token = lex();\n        if (token.type !== Token.Keyword || token.value !== keyword) {\n            throwUnexpectedToken(token);\n        }\n    }\n\n    // Return true if the next token matches the specified punctuator.\n\n    function match(value) {\n        return lookahead.type === Token.Punctuator && lookahead.value === value;\n    }\n\n    // Return true if the next token matches the specified keyword\n\n    function matchKeyword(keyword) {\n        return lookahead.type === Token.Keyword && lookahead.value === keyword;\n    }\n\n    // Return true if the next token matches the specified contextual keyword\n    // (where an identifier is sometimes a keyword depending on the context)\n\n    function matchContextualKeyword(keyword) {\n        return lookahead.type === Token.Identifier && lookahead.value === keyword;\n    }\n\n    // Return true if the next token is an assignment operator\n\n    function matchAssign() {\n        var op;\n\n        if (lookahead.type !== Token.Punctuator) {\n            return false;\n        }\n        op = lookahead.value;\n        return op === '=' ||\n            op === '*=' ||\n            op === '/=' ||\n            op === '%=' ||\n            op === '+=' ||\n            op === '-=' ||\n            op === '<<=' ||\n            op === '>>=' ||\n            op === '>>>=' ||\n            op === '&=' ||\n            op === '^=' ||\n            op === '|=';\n    }\n\n    function consumeSemicolon() {\n        // Catch the very common case first: immediately a semicolon (U+003B).\n        if (source.charCodeAt(startIndex) === 0x3B || match(';')) {\n            lex();\n            return;\n        }\n\n        if (hasLineTerminator) {\n            return;\n        }\n\n        // FIXME(ikarienator): this is seemingly an issue in the previous location info convention.\n        lastIndex = startIndex;\n        lastLineNumber = startLineNumber;\n        lastLineStart = startLineStart;\n\n        if (lookahead.type !== Token.EOF && !match('}')) {\n            throwUnexpectedToken(lookahead);\n        }\n    }\n\n    // Cover grammar support.\n    //\n    // When an assignment expression position starts with an left parenthesis, the determination of the type\n    // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead)\n    // or the first comma. This situation also defers the determination of all the expressions nested in the pair.\n    //\n    // There are three productions that can be parsed in a parentheses pair that needs to be determined\n    // after the outermost pair is closed. They are:\n    //\n    //   1. AssignmentExpression\n    //   2. BindingElements\n    //   3. AssignmentTargets\n    //\n    // In order to avoid exponential backtracking, we use two flags to denote if the production can be\n    // binding element or assignment target.\n    //\n    // The three productions have the relationship:\n    //\n    //   BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression\n    //\n    // with a single exception that CoverInitializedName when used directly in an Expression, generates\n    // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the\n    // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair.\n    //\n    // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not\n    // effect the current flags. This means the production the parser parses is only used as an expression. Therefore\n    // the CoverInitializedName check is conducted.\n    //\n    // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates\n    // the flags outside of the parser. This means the production the parser parses is used as a part of a potential\n    // pattern. The CoverInitializedName check is deferred.\n    function isolateCoverGrammar(parser) {\n        var oldIsBindingElement = isBindingElement,\n            oldIsAssignmentTarget = isAssignmentTarget,\n            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,\n            result;\n        isBindingElement = true;\n        isAssignmentTarget = true;\n        firstCoverInitializedNameError = null;\n        result = parser();\n        if (firstCoverInitializedNameError !== null) {\n            throwUnexpectedToken(firstCoverInitializedNameError);\n        }\n        isBindingElement = oldIsBindingElement;\n        isAssignmentTarget = oldIsAssignmentTarget;\n        firstCoverInitializedNameError = oldFirstCoverInitializedNameError;\n        return result;\n    }\n\n    function inheritCoverGrammar(parser) {\n        var oldIsBindingElement = isBindingElement,\n            oldIsAssignmentTarget = isAssignmentTarget,\n            oldFirstCoverInitializedNameError = firstCoverInitializedNameError,\n            result;\n        isBindingElement = true;\n        isAssignmentTarget = true;\n        firstCoverInitializedNameError = null;\n        result = parser();\n        isBindingElement = isBindingElement && oldIsBindingElement;\n        isAssignmentTarget = isAssignmentTarget && oldIsAssignmentTarget;\n        firstCoverInitializedNameError = oldFirstCoverInitializedNameError || firstCoverInitializedNameError;\n        return result;\n    }\n\n    // ECMA-262 13.3.3 Destructuring Binding Patterns\n\n    function parseArrayPattern(params, kind) {\n        var node = new Node(), elements = [], rest, restNode;\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else {\n                if (match('...')) {\n                    restNode = new Node();\n                    lex();\n                    params.push(lookahead);\n                    rest = parseVariableIdentifier(kind);\n                    elements.push(restNode.finishRestElement(rest));\n                    break;\n                } else {\n                    elements.push(parsePatternWithDefault(params, kind));\n                }\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n\n        }\n\n        expect(']');\n\n        return node.finishArrayPattern(elements);\n    }\n\n    function parsePropertyPattern(params, kind) {\n        var node = new Node(), key, keyToken, computed = match('['), init;\n        if (lookahead.type === Token.Identifier) {\n            keyToken = lookahead;\n            key = parseVariableIdentifier();\n            if (match('=')) {\n                params.push(keyToken);\n                lex();\n                init = parseAssignmentExpression();\n\n                return node.finishProperty(\n                    'init', key, false,\n                    new WrappingNode(keyToken).finishAssignmentPattern(key, init), false, false);\n            } else if (!match(':')) {\n                params.push(keyToken);\n                return node.finishProperty('init', key, false, key, false, true);\n            }\n        } else {\n            key = parseObjectPropertyKey();\n        }\n        expect(':');\n        init = parsePatternWithDefault(params, kind);\n        return node.finishProperty('init', key, computed, init, false, false);\n    }\n\n    function parseObjectPattern(params, kind) {\n        var node = new Node(), properties = [];\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parsePropertyPattern(params, kind));\n            if (!match('}')) {\n                expect(',');\n            }\n        }\n\n        lex();\n\n        return node.finishObjectPattern(properties);\n    }\n\n    function parsePattern(params, kind) {\n        if (match('[')) {\n            return parseArrayPattern(params, kind);\n        } else if (match('{')) {\n            return parseObjectPattern(params, kind);\n        } else if (matchKeyword('let')) {\n            if (kind === 'const' || kind === 'let') {\n                tolerateUnexpectedToken(lookahead, Messages.UnexpectedToken);\n            }\n        }\n\n        params.push(lookahead);\n        return parseVariableIdentifier(kind);\n    }\n\n    function parsePatternWithDefault(params, kind) {\n        var startToken = lookahead, pattern, previousAllowYield, right;\n        pattern = parsePattern(params, kind);\n        if (match('=')) {\n            lex();\n            previousAllowYield = state.allowYield;\n            state.allowYield = true;\n            right = isolateCoverGrammar(parseAssignmentExpression);\n            state.allowYield = previousAllowYield;\n            pattern = new WrappingNode(startToken).finishAssignmentPattern(pattern, right);\n        }\n        return pattern;\n    }\n\n    // ECMA-262 12.2.5 Array Initializer\n\n    function parseArrayInitializer() {\n        var elements = [], node = new Node(), restSpread;\n\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else if (match('...')) {\n                restSpread = new Node();\n                lex();\n                restSpread.finishSpreadElement(inheritCoverGrammar(parseAssignmentExpression));\n\n                if (!match(']')) {\n                    isAssignmentTarget = isBindingElement = false;\n                    expect(',');\n                }\n                elements.push(restSpread);\n            } else {\n                elements.push(inheritCoverGrammar(parseAssignmentExpression));\n\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n        }\n\n        lex();\n\n        return node.finishArrayExpression(elements);\n    }\n\n    // ECMA-262 12.2.6 Object Initializer\n\n    function parsePropertyFunction(node, paramInfo, isGenerator) {\n        var previousStrict, body;\n\n        isAssignmentTarget = isBindingElement = false;\n\n        previousStrict = strict;\n        body = isolateCoverGrammar(parseFunctionSourceElements);\n\n        if (strict && paramInfo.firstRestricted) {\n            tolerateUnexpectedToken(paramInfo.firstRestricted, paramInfo.message);\n        }\n        if (strict && paramInfo.stricted) {\n            tolerateUnexpectedToken(paramInfo.stricted, paramInfo.message);\n        }\n\n        strict = previousStrict;\n        return node.finishFunctionExpression(null, paramInfo.params, paramInfo.defaults, body, isGenerator);\n    }\n\n    function parsePropertyMethodFunction() {\n        var params, method, node = new Node(),\n            previousAllowYield = state.allowYield;\n\n        state.allowYield = false;\n        params = parseParams();\n        state.allowYield = previousAllowYield;\n\n        state.allowYield = false;\n        method = parsePropertyFunction(node, params, false);\n        state.allowYield = previousAllowYield;\n\n        return method;\n    }\n\n    function parseObjectPropertyKey() {\n        var token, node = new Node(), expr;\n\n        token = lex();\n\n        // Note: This function is called only from parseObjectProperty(), where\n        // EOF and Punctuator tokens are already filtered out.\n\n        switch (token.type) {\n        case Token.StringLiteral:\n        case Token.NumericLiteral:\n            if (strict && token.octal) {\n                tolerateUnexpectedToken(token, Messages.StrictOctalLiteral);\n            }\n            return node.finishLiteral(token);\n        case Token.Identifier:\n        case Token.BooleanLiteral:\n        case Token.NullLiteral:\n        case Token.Keyword:\n            return node.finishIdentifier(token.value);\n        case Token.Punctuator:\n            if (token.value === '[') {\n                expr = isolateCoverGrammar(parseAssignmentExpression);\n                expect(']');\n                return expr;\n            }\n            break;\n        }\n        throwUnexpectedToken(token);\n    }\n\n    function lookaheadPropertyName() {\n        switch (lookahead.type) {\n        case Token.Identifier:\n        case Token.StringLiteral:\n        case Token.BooleanLiteral:\n        case Token.NullLiteral:\n        case Token.NumericLiteral:\n        case Token.Keyword:\n            return true;\n        case Token.Punctuator:\n            return lookahead.value === '[';\n        }\n        return false;\n    }\n\n    // This function is to try to parse a MethodDefinition as defined in 14.3. But in the case of object literals,\n    // it might be called at a position where there is in fact a short hand identifier pattern or a data property.\n    // This can only be determined after we consumed up to the left parentheses.\n    //\n    // In order to avoid back tracking, it returns `null` if the position is not a MethodDefinition and the caller\n    // is responsible to visit other options.\n    function tryParseMethodDefinition(token, key, computed, node) {\n        var value, options, methodNode, params,\n            previousAllowYield = state.allowYield;\n\n        if (token.type === Token.Identifier) {\n            // check for `get` and `set`;\n\n            if (token.value === 'get' && lookaheadPropertyName()) {\n                computed = match('[');\n                key = parseObjectPropertyKey();\n                methodNode = new Node();\n                expect('(');\n                expect(')');\n\n                state.allowYield = false;\n                value = parsePropertyFunction(methodNode, {\n                    params: [],\n                    defaults: [],\n                    stricted: null,\n                    firstRestricted: null,\n                    message: null\n                }, false);\n                state.allowYield = previousAllowYield;\n\n                return node.finishProperty('get', key, computed, value, false, false);\n            } else if (token.value === 'set' && lookaheadPropertyName()) {\n                computed = match('[');\n                key = parseObjectPropertyKey();\n                methodNode = new Node();\n                expect('(');\n\n                options = {\n                    params: [],\n                    defaultCount: 0,\n                    defaults: [],\n                    firstRestricted: null,\n                    paramSet: {}\n                };\n                if (match(')')) {\n                    tolerateUnexpectedToken(lookahead);\n                } else {\n                    state.allowYield = false;\n                    parseParam(options);\n                    state.allowYield = previousAllowYield;\n                    if (options.defaultCount === 0) {\n                        options.defaults = [];\n                    }\n                }\n                expect(')');\n\n                state.allowYield = false;\n                value = parsePropertyFunction(methodNode, options, false);\n                state.allowYield = previousAllowYield;\n\n                return node.finishProperty('set', key, computed, value, false, false);\n            }\n        } else if (token.type === Token.Punctuator && token.value === '*' && lookaheadPropertyName()) {\n            computed = match('[');\n            key = parseObjectPropertyKey();\n            methodNode = new Node();\n\n            state.allowYield = true;\n            params = parseParams();\n            state.allowYield = previousAllowYield;\n\n            state.allowYield = false;\n            value = parsePropertyFunction(methodNode, params, true);\n            state.allowYield = previousAllowYield;\n\n            return node.finishProperty('init', key, computed, value, true, false);\n        }\n\n        if (key && match('(')) {\n            value = parsePropertyMethodFunction();\n            return node.finishProperty('init', key, computed, value, true, false);\n        }\n\n        // Not a MethodDefinition.\n        return null;\n    }\n\n    function parseObjectProperty(hasProto) {\n        var token = lookahead, node = new Node(), computed, key, maybeMethod, proto, value;\n\n        computed = match('[');\n        if (match('*')) {\n            lex();\n        } else {\n            key = parseObjectPropertyKey();\n        }\n        maybeMethod = tryParseMethodDefinition(token, key, computed, node);\n        if (maybeMethod) {\n            return maybeMethod;\n        }\n\n        if (!key) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        // Check for duplicated __proto__\n        if (!computed) {\n            proto = (key.type === Syntax.Identifier && key.name === '__proto__') ||\n                (key.type === Syntax.Literal && key.value === '__proto__');\n            if (hasProto.value && proto) {\n                tolerateError(Messages.DuplicateProtoProperty);\n            }\n            hasProto.value |= proto;\n        }\n\n        if (match(':')) {\n            lex();\n            value = inheritCoverGrammar(parseAssignmentExpression);\n            return node.finishProperty('init', key, computed, value, false, false);\n        }\n\n        if (token.type === Token.Identifier) {\n            if (match('=')) {\n                firstCoverInitializedNameError = lookahead;\n                lex();\n                value = isolateCoverGrammar(parseAssignmentExpression);\n                return node.finishProperty('init', key, computed,\n                    new WrappingNode(token).finishAssignmentPattern(key, value), false, true);\n            }\n            return node.finishProperty('init', key, computed, key, false, true);\n        }\n\n        throwUnexpectedToken(lookahead);\n    }\n\n    function parseObjectInitializer() {\n        var properties = [], hasProto = {value: false}, node = new Node();\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parseObjectProperty(hasProto));\n\n            if (!match('}')) {\n                expectCommaSeparator();\n            }\n        }\n\n        expect('}');\n\n        return node.finishObjectExpression(properties);\n    }\n\n    function reinterpretExpressionAsPattern(expr) {\n        var i;\n        switch (expr.type) {\n        case Syntax.Identifier:\n        case Syntax.MemberExpression:\n        case Syntax.RestElement:\n        case Syntax.AssignmentPattern:\n            break;\n        case Syntax.SpreadElement:\n            expr.type = Syntax.RestElement;\n            reinterpretExpressionAsPattern(expr.argument);\n            break;\n        case Syntax.ArrayExpression:\n            expr.type = Syntax.ArrayPattern;\n            for (i = 0; i < expr.elements.length; i++) {\n                if (expr.elements[i] !== null) {\n                    reinterpretExpressionAsPattern(expr.elements[i]);\n                }\n            }\n            break;\n        case Syntax.ObjectExpression:\n            expr.type = Syntax.ObjectPattern;\n            for (i = 0; i < expr.properties.length; i++) {\n                reinterpretExpressionAsPattern(expr.properties[i].value);\n            }\n            break;\n        case Syntax.AssignmentExpression:\n            expr.type = Syntax.AssignmentPattern;\n            reinterpretExpressionAsPattern(expr.left);\n            break;\n        default:\n            // Allow other node type for tolerant parsing.\n            break;\n        }\n    }\n\n    // ECMA-262 12.2.9 Template Literals\n\n    function parseTemplateElement(option) {\n        var node, token;\n\n        if (lookahead.type !== Token.Template || (option.head && !lookahead.head)) {\n            throwUnexpectedToken();\n        }\n\n        node = new Node();\n        token = lex();\n\n        return node.finishTemplateElement({ raw: token.value.raw, cooked: token.value.cooked }, token.tail);\n    }\n\n    function parseTemplateLiteral() {\n        var quasi, quasis, expressions, node = new Node();\n\n        quasi = parseTemplateElement({ head: true });\n        quasis = [quasi];\n        expressions = [];\n\n        while (!quasi.tail) {\n            expressions.push(parseExpression());\n            quasi = parseTemplateElement({ head: false });\n            quasis.push(quasi);\n        }\n\n        return node.finishTemplateLiteral(quasis, expressions);\n    }\n\n    // ECMA-262 12.2.10 The Grouping Operator\n\n    function parseGroupExpression() {\n        var expr, expressions, startToken, i, params = [];\n\n        expect('(');\n\n        if (match(')')) {\n            lex();\n            if (!match('=>')) {\n                expect('=>');\n            }\n            return {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: [],\n                rawParams: []\n            };\n        }\n\n        startToken = lookahead;\n        if (match('...')) {\n            expr = parseRestElement(params);\n            expect(')');\n            if (!match('=>')) {\n                expect('=>');\n            }\n            return {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: [expr]\n            };\n        }\n\n        isBindingElement = true;\n        expr = inheritCoverGrammar(parseAssignmentExpression);\n\n        if (match(',')) {\n            isAssignmentTarget = false;\n            expressions = [expr];\n\n            while (startIndex < length) {\n                if (!match(',')) {\n                    break;\n                }\n                lex();\n\n                if (match('...')) {\n                    if (!isBindingElement) {\n                        throwUnexpectedToken(lookahead);\n                    }\n                    expressions.push(parseRestElement(params));\n                    expect(')');\n                    if (!match('=>')) {\n                        expect('=>');\n                    }\n                    isBindingElement = false;\n                    for (i = 0; i < expressions.length; i++) {\n                        reinterpretExpressionAsPattern(expressions[i]);\n                    }\n                    return {\n                        type: PlaceHolders.ArrowParameterPlaceHolder,\n                        params: expressions\n                    };\n                }\n\n                expressions.push(inheritCoverGrammar(parseAssignmentExpression));\n            }\n\n            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);\n        }\n\n\n        expect(')');\n\n        if (match('=>')) {\n            if (expr.type === Syntax.Identifier && expr.name === 'yield') {\n                return {\n                    type: PlaceHolders.ArrowParameterPlaceHolder,\n                    params: [expr]\n                };\n            }\n\n            if (!isBindingElement) {\n                throwUnexpectedToken(lookahead);\n            }\n\n            if (expr.type === Syntax.SequenceExpression) {\n                for (i = 0; i < expr.expressions.length; i++) {\n                    reinterpretExpressionAsPattern(expr.expressions[i]);\n                }\n            } else {\n                reinterpretExpressionAsPattern(expr);\n            }\n\n            expr = {\n                type: PlaceHolders.ArrowParameterPlaceHolder,\n                params: expr.type === Syntax.SequenceExpression ? expr.expressions : [expr]\n            };\n        }\n        isBindingElement = false;\n        return expr;\n    }\n\n\n    // ECMA-262 12.2 Primary Expressions\n\n    function parsePrimaryExpression() {\n        var type, token, expr, node;\n\n        if (match('(')) {\n            isBindingElement = false;\n            return inheritCoverGrammar(parseGroupExpression);\n        }\n\n        if (match('[')) {\n            return inheritCoverGrammar(parseArrayInitializer);\n        }\n\n        if (match('{')) {\n            return inheritCoverGrammar(parseObjectInitializer);\n        }\n\n        type = lookahead.type;\n        node = new Node();\n\n        if (type === Token.Identifier) {\n            if (state.sourceType === 'module' && lookahead.value === 'await') {\n                tolerateUnexpectedToken(lookahead);\n            }\n            expr = node.finishIdentifier(lex().value);\n        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            if (strict && lookahead.octal) {\n                tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral);\n            }\n            expr = node.finishLiteral(lex());\n        } else if (type === Token.Keyword) {\n            if (!strict && state.allowYield && matchKeyword('yield')) {\n                return parseNonComputedProperty();\n            }\n            if (!strict && matchKeyword('let')) {\n                return node.finishIdentifier(lex().value);\n            }\n            isAssignmentTarget = isBindingElement = false;\n            if (matchKeyword('function')) {\n                return parseFunctionExpression();\n            }\n            if (matchKeyword('this')) {\n                lex();\n                return node.finishThisExpression();\n            }\n            if (matchKeyword('class')) {\n                return parseClassExpression();\n            }\n            throwUnexpectedToken(lex());\n        } else if (type === Token.BooleanLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            token = lex();\n            token.value = (token.value === 'true');\n            expr = node.finishLiteral(token);\n        } else if (type === Token.NullLiteral) {\n            isAssignmentTarget = isBindingElement = false;\n            token = lex();\n            token.value = null;\n            expr = node.finishLiteral(token);\n        } else if (match('/') || match('/=')) {\n            isAssignmentTarget = isBindingElement = false;\n            index = startIndex;\n\n            if (typeof extra.tokens !== 'undefined') {\n                token = collectRegex();\n            } else {\n                token = scanRegExp();\n            }\n            lex();\n            expr = node.finishLiteral(token);\n        } else if (type === Token.Template) {\n            expr = parseTemplateLiteral();\n        } else {\n            throwUnexpectedToken(lex());\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.3 Left-Hand-Side Expressions\n\n    function parseArguments() {\n        var args = [], expr;\n\n        expect('(');\n\n        if (!match(')')) {\n            while (startIndex < length) {\n                if (match('...')) {\n                    expr = new Node();\n                    lex();\n                    expr.finishSpreadElement(isolateCoverGrammar(parseAssignmentExpression));\n                } else {\n                    expr = isolateCoverGrammar(parseAssignmentExpression);\n                }\n                args.push(expr);\n                if (match(')')) {\n                    break;\n                }\n                expectCommaSeparator();\n            }\n        }\n\n        expect(')');\n\n        return args;\n    }\n\n    function parseNonComputedProperty() {\n        var token, node = new Node();\n\n        token = lex();\n\n        if (!isIdentifierName(token)) {\n            throwUnexpectedToken(token);\n        }\n\n        return node.finishIdentifier(token.value);\n    }\n\n    function parseNonComputedMember() {\n        expect('.');\n\n        return parseNonComputedProperty();\n    }\n\n    function parseComputedMember() {\n        var expr;\n\n        expect('[');\n\n        expr = isolateCoverGrammar(parseExpression);\n\n        expect(']');\n\n        return expr;\n    }\n\n    // ECMA-262 12.3.3 The new Operator\n\n    function parseNewExpression() {\n        var callee, args, node = new Node();\n\n        expectKeyword('new');\n\n        if (match('.')) {\n            lex();\n            if (lookahead.type === Token.Identifier && lookahead.value === 'target') {\n                if (state.inFunctionBody) {\n                    lex();\n                    return node.finishMetaProperty('new', 'target');\n                }\n            }\n            throwUnexpectedToken(lookahead);\n        }\n\n        callee = isolateCoverGrammar(parseLeftHandSideExpression);\n        args = match('(') ? parseArguments() : [];\n\n        isAssignmentTarget = isBindingElement = false;\n\n        return node.finishNewExpression(callee, args);\n    }\n\n    // ECMA-262 12.3.4 Function Calls\n\n    function parseLeftHandSideExpressionAllowCall() {\n        var quasi, expr, args, property, startToken, previousAllowIn = state.allowIn;\n\n        startToken = lookahead;\n        state.allowIn = true;\n\n        if (matchKeyword('super') && state.inFunctionBody) {\n            expr = new Node();\n            lex();\n            expr = expr.finishSuper();\n            if (!match('(') && !match('.') && !match('[')) {\n                throwUnexpectedToken(lookahead);\n            }\n        } else {\n            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);\n        }\n\n        for (;;) {\n            if (match('.')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseNonComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);\n            } else if (match('(')) {\n                isBindingElement = false;\n                isAssignmentTarget = false;\n                args = parseArguments();\n                expr = new WrappingNode(startToken).finishCallExpression(expr, args);\n            } else if (match('[')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);\n            } else if (lookahead.type === Token.Template && lookahead.head) {\n                quasi = parseTemplateLiteral();\n                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);\n            } else {\n                break;\n            }\n        }\n        state.allowIn = previousAllowIn;\n\n        return expr;\n    }\n\n    // ECMA-262 12.3 Left-Hand-Side Expressions\n\n    function parseLeftHandSideExpression() {\n        var quasi, expr, property, startToken;\n        assert(state.allowIn, 'callee of new expression always allow in keyword.');\n\n        startToken = lookahead;\n\n        if (matchKeyword('super') && state.inFunctionBody) {\n            expr = new Node();\n            lex();\n            expr = expr.finishSuper();\n            if (!match('[') && !match('.')) {\n                throwUnexpectedToken(lookahead);\n            }\n        } else {\n            expr = inheritCoverGrammar(matchKeyword('new') ? parseNewExpression : parsePrimaryExpression);\n        }\n\n        for (;;) {\n            if (match('[')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property);\n            } else if (match('.')) {\n                isBindingElement = false;\n                isAssignmentTarget = true;\n                property = parseNonComputedMember();\n                expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property);\n            } else if (lookahead.type === Token.Template && lookahead.head) {\n                quasi = parseTemplateLiteral();\n                expr = new WrappingNode(startToken).finishTaggedTemplateExpression(expr, quasi);\n            } else {\n                break;\n            }\n        }\n        return expr;\n    }\n\n    // ECMA-262 12.4 Postfix Expressions\n\n    function parsePostfixExpression() {\n        var expr, token, startToken = lookahead;\n\n        expr = inheritCoverGrammar(parseLeftHandSideExpressionAllowCall);\n\n        if (!hasLineTerminator && lookahead.type === Token.Punctuator) {\n            if (match('++') || match('--')) {\n                // ECMA-262 11.3.1, 11.3.2\n                if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {\n                    tolerateError(Messages.StrictLHSPostfix);\n                }\n\n                if (!isAssignmentTarget) {\n                    tolerateError(Messages.InvalidLHSInAssignment);\n                }\n\n                isAssignmentTarget = isBindingElement = false;\n\n                token = lex();\n                expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr);\n            }\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.5 Unary Operators\n\n    function parseUnaryExpression() {\n        var token, expr, startToken;\n\n        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {\n            expr = parsePostfixExpression();\n        } else if (match('++') || match('--')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            // ECMA-262 11.4.4, 11.4.5\n            if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {\n                tolerateError(Messages.StrictLHSPrefix);\n            }\n\n            if (!isAssignmentTarget) {\n                tolerateError(Messages.InvalidLHSInAssignment);\n            }\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            isAssignmentTarget = isBindingElement = false;\n        } else if (match('+') || match('-') || match('~') || match('!')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            isAssignmentTarget = isBindingElement = false;\n        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {\n            startToken = lookahead;\n            token = lex();\n            expr = inheritCoverGrammar(parseUnaryExpression);\n            expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr);\n            if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) {\n                tolerateError(Messages.StrictDelete);\n            }\n            isAssignmentTarget = isBindingElement = false;\n        } else {\n            expr = parsePostfixExpression();\n        }\n\n        return expr;\n    }\n\n    function binaryPrecedence(token, allowIn) {\n        var prec = 0;\n\n        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {\n            return 0;\n        }\n\n        switch (token.value) {\n        case '||':\n            prec = 1;\n            break;\n\n        case '&&':\n            prec = 2;\n            break;\n\n        case '|':\n            prec = 3;\n            break;\n\n        case '^':\n            prec = 4;\n            break;\n\n        case '&':\n            prec = 5;\n            break;\n\n        case '==':\n        case '!=':\n        case '===':\n        case '!==':\n            prec = 6;\n            break;\n\n        case '<':\n        case '>':\n        case '<=':\n        case '>=':\n        case 'instanceof':\n            prec = 7;\n            break;\n\n        case 'in':\n            prec = allowIn ? 7 : 0;\n            break;\n\n        case '<<':\n        case '>>':\n        case '>>>':\n            prec = 8;\n            break;\n\n        case '+':\n        case '-':\n            prec = 9;\n            break;\n\n        case '*':\n        case '/':\n        case '%':\n            prec = 11;\n            break;\n\n        default:\n            break;\n        }\n\n        return prec;\n    }\n\n    // ECMA-262 12.6 Multiplicative Operators\n    // ECMA-262 12.7 Additive Operators\n    // ECMA-262 12.8 Bitwise Shift Operators\n    // ECMA-262 12.9 Relational Operators\n    // ECMA-262 12.10 Equality Operators\n    // ECMA-262 12.11 Binary Bitwise Operators\n    // ECMA-262 12.12 Binary Logical Operators\n\n    function parseBinaryExpression() {\n        var marker, markers, expr, token, prec, stack, right, operator, left, i;\n\n        marker = lookahead;\n        left = inheritCoverGrammar(parseUnaryExpression);\n\n        token = lookahead;\n        prec = binaryPrecedence(token, state.allowIn);\n        if (prec === 0) {\n            return left;\n        }\n        isAssignmentTarget = isBindingElement = false;\n        token.prec = prec;\n        lex();\n\n        markers = [marker, lookahead];\n        right = isolateCoverGrammar(parseUnaryExpression);\n\n        stack = [left, token, right];\n\n        while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) {\n\n            // Reduce: make a binary expression from the three topmost entries.\n            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {\n                right = stack.pop();\n                operator = stack.pop().value;\n                left = stack.pop();\n                markers.pop();\n                expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right);\n                stack.push(expr);\n            }\n\n            // Shift.\n            token = lex();\n            token.prec = prec;\n            stack.push(token);\n            markers.push(lookahead);\n            expr = isolateCoverGrammar(parseUnaryExpression);\n            stack.push(expr);\n        }\n\n        // Final reduce to clean-up the stack.\n        i = stack.length - 1;\n        expr = stack[i];\n        markers.pop();\n        while (i > 1) {\n            expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr);\n            i -= 2;\n        }\n\n        return expr;\n    }\n\n\n    // ECMA-262 12.13 Conditional Operator\n\n    function parseConditionalExpression() {\n        var expr, previousAllowIn, consequent, alternate, startToken;\n\n        startToken = lookahead;\n\n        expr = inheritCoverGrammar(parseBinaryExpression);\n        if (match('?')) {\n            lex();\n            previousAllowIn = state.allowIn;\n            state.allowIn = true;\n            consequent = isolateCoverGrammar(parseAssignmentExpression);\n            state.allowIn = previousAllowIn;\n            expect(':');\n            alternate = isolateCoverGrammar(parseAssignmentExpression);\n\n            expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate);\n            isAssignmentTarget = isBindingElement = false;\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 14.2 Arrow Function Definitions\n\n    function parseConciseBody() {\n        if (match('{')) {\n            return parseFunctionSourceElements();\n        }\n        return isolateCoverGrammar(parseAssignmentExpression);\n    }\n\n    function checkPatternParam(options, param) {\n        var i;\n        switch (param.type) {\n        case Syntax.Identifier:\n            validateParam(options, param, param.name);\n            break;\n        case Syntax.RestElement:\n            checkPatternParam(options, param.argument);\n            break;\n        case Syntax.AssignmentPattern:\n            checkPatternParam(options, param.left);\n            break;\n        case Syntax.ArrayPattern:\n            for (i = 0; i < param.elements.length; i++) {\n                if (param.elements[i] !== null) {\n                    checkPatternParam(options, param.elements[i]);\n                }\n            }\n            break;\n        case Syntax.YieldExpression:\n            break;\n        default:\n            assert(param.type === Syntax.ObjectPattern, 'Invalid type');\n            for (i = 0; i < param.properties.length; i++) {\n                checkPatternParam(options, param.properties[i].value);\n            }\n            break;\n        }\n    }\n    function reinterpretAsCoverFormalsList(expr) {\n        var i, len, param, params, defaults, defaultCount, options, token;\n\n        defaults = [];\n        defaultCount = 0;\n        params = [expr];\n\n        switch (expr.type) {\n        case Syntax.Identifier:\n            break;\n        case PlaceHolders.ArrowParameterPlaceHolder:\n            params = expr.params;\n            break;\n        default:\n            return null;\n        }\n\n        options = {\n            paramSet: {}\n        };\n\n        for (i = 0, len = params.length; i < len; i += 1) {\n            param = params[i];\n            switch (param.type) {\n            case Syntax.AssignmentPattern:\n                params[i] = param.left;\n                if (param.right.type === Syntax.YieldExpression) {\n                    if (param.right.argument) {\n                        throwUnexpectedToken(lookahead);\n                    }\n                    param.right.type = Syntax.Identifier;\n                    param.right.name = 'yield';\n                    delete param.right.argument;\n                    delete param.right.delegate;\n                }\n                defaults.push(param.right);\n                ++defaultCount;\n                checkPatternParam(options, param.left);\n                break;\n            default:\n                checkPatternParam(options, param);\n                params[i] = param;\n                defaults.push(null);\n                break;\n            }\n        }\n\n        if (strict || !state.allowYield) {\n            for (i = 0, len = params.length; i < len; i += 1) {\n                param = params[i];\n                if (param.type === Syntax.YieldExpression) {\n                    throwUnexpectedToken(lookahead);\n                }\n            }\n        }\n\n        if (options.message === Messages.StrictParamDupe) {\n            token = strict ? options.stricted : options.firstRestricted;\n            throwUnexpectedToken(token, options.message);\n        }\n\n        if (defaultCount === 0) {\n            defaults = [];\n        }\n\n        return {\n            params: params,\n            defaults: defaults,\n            stricted: options.stricted,\n            firstRestricted: options.firstRestricted,\n            message: options.message\n        };\n    }\n\n    function parseArrowFunctionExpression(options, node) {\n        var previousStrict, previousAllowYield, body;\n\n        if (hasLineTerminator) {\n            tolerateUnexpectedToken(lookahead);\n        }\n        expect('=>');\n\n        previousStrict = strict;\n        previousAllowYield = state.allowYield;\n        state.allowYield = true;\n\n        body = parseConciseBody();\n\n        if (strict && options.firstRestricted) {\n            throwUnexpectedToken(options.firstRestricted, options.message);\n        }\n        if (strict && options.stricted) {\n            tolerateUnexpectedToken(options.stricted, options.message);\n        }\n\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement);\n    }\n\n    // ECMA-262 14.4 Yield expression\n\n    function parseYieldExpression() {\n        var argument, expr, delegate, previousAllowYield;\n\n        argument = null;\n        expr = new Node();\n        delegate = false;\n\n        expectKeyword('yield');\n\n        if (!hasLineTerminator) {\n            previousAllowYield = state.allowYield;\n            state.allowYield = false;\n            delegate = match('*');\n            if (delegate) {\n                lex();\n                argument = parseAssignmentExpression();\n            } else {\n                if (!match(';') && !match('}') && !match(')') && lookahead.type !== Token.EOF) {\n                    argument = parseAssignmentExpression();\n                }\n            }\n            state.allowYield = previousAllowYield;\n        }\n\n        return expr.finishYieldExpression(argument, delegate);\n    }\n\n    // ECMA-262 12.14 Assignment Operators\n\n    function parseAssignmentExpression() {\n        var token, expr, right, list, startToken;\n\n        startToken = lookahead;\n        token = lookahead;\n\n        if (!state.allowYield && matchKeyword('yield')) {\n            return parseYieldExpression();\n        }\n\n        expr = parseConditionalExpression();\n\n        if (expr.type === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) {\n            isAssignmentTarget = isBindingElement = false;\n            list = reinterpretAsCoverFormalsList(expr);\n\n            if (list) {\n                firstCoverInitializedNameError = null;\n                return parseArrowFunctionExpression(list, new WrappingNode(startToken));\n            }\n\n            return expr;\n        }\n\n        if (matchAssign()) {\n            if (!isAssignmentTarget) {\n                tolerateError(Messages.InvalidLHSInAssignment);\n            }\n\n            // ECMA-262 12.1.1\n            if (strict && expr.type === Syntax.Identifier) {\n                if (isRestrictedWord(expr.name)) {\n                    tolerateUnexpectedToken(token, Messages.StrictLHSAssignment);\n                }\n                if (isStrictModeReservedWord(expr.name)) {\n                    tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n                }\n            }\n\n            if (!match('=')) {\n                isAssignmentTarget = isBindingElement = false;\n            } else {\n                reinterpretExpressionAsPattern(expr);\n            }\n\n            token = lex();\n            right = isolateCoverGrammar(parseAssignmentExpression);\n            expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right);\n            firstCoverInitializedNameError = null;\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 12.15 Comma Operator\n\n    function parseExpression() {\n        var expr, startToken = lookahead, expressions;\n\n        expr = isolateCoverGrammar(parseAssignmentExpression);\n\n        if (match(',')) {\n            expressions = [expr];\n\n            while (startIndex < length) {\n                if (!match(',')) {\n                    break;\n                }\n                lex();\n                expressions.push(isolateCoverGrammar(parseAssignmentExpression));\n            }\n\n            expr = new WrappingNode(startToken).finishSequenceExpression(expressions);\n        }\n\n        return expr;\n    }\n\n    // ECMA-262 13.2 Block\n\n    function parseStatementListItem() {\n        if (lookahead.type === Token.Keyword) {\n            switch (lookahead.value) {\n            case 'export':\n                if (state.sourceType !== 'module') {\n                    tolerateUnexpectedToken(lookahead, Messages.IllegalExportDeclaration);\n                }\n                return parseExportDeclaration();\n            case 'import':\n                if (state.sourceType !== 'module') {\n                    tolerateUnexpectedToken(lookahead, Messages.IllegalImportDeclaration);\n                }\n                return parseImportDeclaration();\n            case 'const':\n                return parseLexicalDeclaration({inFor: false});\n            case 'function':\n                return parseFunctionDeclaration(new Node());\n            case 'class':\n                return parseClassDeclaration();\n            }\n        }\n\n        if (matchKeyword('let') && isLexicalDeclaration()) {\n            return parseLexicalDeclaration({inFor: false});\n        }\n\n        return parseStatement();\n    }\n\n    function parseStatementList() {\n        var list = [];\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            list.push(parseStatementListItem());\n        }\n\n        return list;\n    }\n\n    function parseBlock() {\n        var block, node = new Node();\n\n        expect('{');\n\n        block = parseStatementList();\n\n        expect('}');\n\n        return node.finishBlockStatement(block);\n    }\n\n    // ECMA-262 13.3.2 Variable Statement\n\n    function parseVariableIdentifier(kind) {\n        var token, node = new Node();\n\n        token = lex();\n\n        if (token.type === Token.Keyword && token.value === 'yield') {\n            if (strict) {\n                tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n            } if (!state.allowYield) {\n                throwUnexpectedToken(token);\n            }\n        } else if (token.type !== Token.Identifier) {\n            if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) {\n                tolerateUnexpectedToken(token, Messages.StrictReservedWord);\n            } else {\n                if (strict || token.value !== 'let' || kind !== 'var') {\n                    throwUnexpectedToken(token);\n                }\n            }\n        } else if (state.sourceType === 'module' && token.type === Token.Identifier && token.value === 'await') {\n            tolerateUnexpectedToken(token);\n        }\n\n        return node.finishIdentifier(token.value);\n    }\n\n    function parseVariableDeclaration(options) {\n        var init = null, id, node = new Node(), params = [];\n\n        id = parsePattern(params, 'var');\n\n        // ECMA-262 12.2.1\n        if (strict && isRestrictedWord(id.name)) {\n            tolerateError(Messages.StrictVarName);\n        }\n\n        if (match('=')) {\n            lex();\n            init = isolateCoverGrammar(parseAssignmentExpression);\n        } else if (id.type !== Syntax.Identifier && !options.inFor) {\n            expect('=');\n        }\n\n        return node.finishVariableDeclarator(id, init);\n    }\n\n    function parseVariableDeclarationList(options) {\n        var opt, list;\n\n        opt = { inFor: options.inFor };\n        list = [parseVariableDeclaration(opt)];\n\n        while (match(',')) {\n            lex();\n            list.push(parseVariableDeclaration(opt));\n        }\n\n        return list;\n    }\n\n    function parseVariableStatement(node) {\n        var declarations;\n\n        expectKeyword('var');\n\n        declarations = parseVariableDeclarationList({ inFor: false });\n\n        consumeSemicolon();\n\n        return node.finishVariableDeclaration(declarations);\n    }\n\n    // ECMA-262 13.3.1 Let and Const Declarations\n\n    function parseLexicalBinding(kind, options) {\n        var init = null, id, node = new Node(), params = [];\n\n        id = parsePattern(params, kind);\n\n        // ECMA-262 12.2.1\n        if (strict && id.type === Syntax.Identifier && isRestrictedWord(id.name)) {\n            tolerateError(Messages.StrictVarName);\n        }\n\n        if (kind === 'const') {\n            if (!matchKeyword('in') && !matchContextualKeyword('of')) {\n                expect('=');\n                init = isolateCoverGrammar(parseAssignmentExpression);\n            }\n        } else if ((!options.inFor && id.type !== Syntax.Identifier) || match('=')) {\n            expect('=');\n            init = isolateCoverGrammar(parseAssignmentExpression);\n        }\n\n        return node.finishVariableDeclarator(id, init);\n    }\n\n    function parseBindingList(kind, options) {\n        var list = [parseLexicalBinding(kind, options)];\n\n        while (match(',')) {\n            lex();\n            list.push(parseLexicalBinding(kind, options));\n        }\n\n        return list;\n    }\n\n\n    function tokenizerState() {\n        return {\n            index: index,\n            lineNumber: lineNumber,\n            lineStart: lineStart,\n            hasLineTerminator: hasLineTerminator,\n            lastIndex: lastIndex,\n            lastLineNumber: lastLineNumber,\n            lastLineStart: lastLineStart,\n            startIndex: startIndex,\n            startLineNumber: startLineNumber,\n            startLineStart: startLineStart,\n            lookahead: lookahead,\n            tokenCount: extra.tokens ? extra.tokens.length : 0\n        };\n    }\n\n    function resetTokenizerState(ts) {\n        index = ts.index;\n        lineNumber = ts.lineNumber;\n        lineStart = ts.lineStart;\n        hasLineTerminator = ts.hasLineTerminator;\n        lastIndex = ts.lastIndex;\n        lastLineNumber = ts.lastLineNumber;\n        lastLineStart = ts.lastLineStart;\n        startIndex = ts.startIndex;\n        startLineNumber = ts.startLineNumber;\n        startLineStart = ts.startLineStart;\n        lookahead = ts.lookahead;\n        if (extra.tokens) {\n            extra.tokens.splice(ts.tokenCount, extra.tokens.length);\n        }\n    }\n\n    function isLexicalDeclaration() {\n        var lexical, ts;\n\n        ts = tokenizerState();\n\n        lex();\n        lexical = (lookahead.type === Token.Identifier) || match('[') || match('{') ||\n            matchKeyword('let') || matchKeyword('yield');\n\n        resetTokenizerState(ts);\n\n        return lexical;\n    }\n\n    function parseLexicalDeclaration(options) {\n        var kind, declarations, node = new Node();\n\n        kind = lex().value;\n        assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const');\n\n        declarations = parseBindingList(kind, options);\n\n        consumeSemicolon();\n\n        return node.finishLexicalDeclaration(declarations, kind);\n    }\n\n    function parseRestElement(params) {\n        var param, node = new Node();\n\n        lex();\n\n        if (match('{')) {\n            throwError(Messages.ObjectPatternAsRestParameter);\n        }\n\n        params.push(lookahead);\n\n        param = parseVariableIdentifier();\n\n        if (match('=')) {\n            throwError(Messages.DefaultRestParameter);\n        }\n\n        if (!match(')')) {\n            throwError(Messages.ParameterAfterRestParameter);\n        }\n\n        return node.finishRestElement(param);\n    }\n\n    // ECMA-262 13.4 Empty Statement\n\n    function parseEmptyStatement(node) {\n        expect(';');\n        return node.finishEmptyStatement();\n    }\n\n    // ECMA-262 12.4 Expression Statement\n\n    function parseExpressionStatement(node) {\n        var expr = parseExpression();\n        consumeSemicolon();\n        return node.finishExpressionStatement(expr);\n    }\n\n    // ECMA-262 13.6 If statement\n\n    function parseIfStatement(node) {\n        var test, consequent, alternate;\n\n        expectKeyword('if');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        consequent = parseStatement();\n\n        if (matchKeyword('else')) {\n            lex();\n            alternate = parseStatement();\n        } else {\n            alternate = null;\n        }\n\n        return node.finishIfStatement(test, consequent, alternate);\n    }\n\n    // ECMA-262 13.7 Iteration Statements\n\n    function parseDoWhileStatement(node) {\n        var body, test, oldInIteration;\n\n        expectKeyword('do');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = parseStatement();\n\n        state.inIteration = oldInIteration;\n\n        expectKeyword('while');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        if (match(';')) {\n            lex();\n        }\n\n        return node.finishDoWhileStatement(body, test);\n    }\n\n    function parseWhileStatement(node) {\n        var test, body, oldInIteration;\n\n        expectKeyword('while');\n\n        expect('(');\n\n        test = parseExpression();\n\n        expect(')');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = parseStatement();\n\n        state.inIteration = oldInIteration;\n\n        return node.finishWhileStatement(test, body);\n    }\n\n    function parseForStatement(node) {\n        var init, forIn, initSeq, initStartToken, test, update, left, right, kind, declarations,\n            body, oldInIteration, previousAllowIn = state.allowIn;\n\n        init = test = update = null;\n        forIn = true;\n\n        expectKeyword('for');\n\n        expect('(');\n\n        if (match(';')) {\n            lex();\n        } else {\n            if (matchKeyword('var')) {\n                init = new Node();\n                lex();\n\n                state.allowIn = false;\n                declarations = parseVariableDeclarationList({ inFor: true });\n                state.allowIn = previousAllowIn;\n\n                if (declarations.length === 1 && matchKeyword('in')) {\n                    init = init.finishVariableDeclaration(declarations);\n                    lex();\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {\n                    init = init.finishVariableDeclaration(declarations);\n                    lex();\n                    left = init;\n                    right = parseAssignmentExpression();\n                    init = null;\n                    forIn = false;\n                } else {\n                    init = init.finishVariableDeclaration(declarations);\n                    expect(';');\n                }\n            } else if (matchKeyword('const') || matchKeyword('let')) {\n                init = new Node();\n                kind = lex().value;\n\n                if (!strict && lookahead.value === 'in') {\n                    init = init.finishIdentifier(kind);\n                    lex();\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else {\n                    state.allowIn = false;\n                    declarations = parseBindingList(kind, {inFor: true});\n                    state.allowIn = previousAllowIn;\n\n                    if (declarations.length === 1 && declarations[0].init === null && matchKeyword('in')) {\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                        lex();\n                        left = init;\n                        right = parseExpression();\n                        init = null;\n                    } else if (declarations.length === 1 && declarations[0].init === null && matchContextualKeyword('of')) {\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                        lex();\n                        left = init;\n                        right = parseAssignmentExpression();\n                        init = null;\n                        forIn = false;\n                    } else {\n                        consumeSemicolon();\n                        init = init.finishLexicalDeclaration(declarations, kind);\n                    }\n                }\n            } else {\n                initStartToken = lookahead;\n                state.allowIn = false;\n                init = inheritCoverGrammar(parseAssignmentExpression);\n                state.allowIn = previousAllowIn;\n\n                if (matchKeyword('in')) {\n                    if (!isAssignmentTarget) {\n                        tolerateError(Messages.InvalidLHSInForIn);\n                    }\n\n                    lex();\n                    reinterpretExpressionAsPattern(init);\n                    left = init;\n                    right = parseExpression();\n                    init = null;\n                } else if (matchContextualKeyword('of')) {\n                    if (!isAssignmentTarget) {\n                        tolerateError(Messages.InvalidLHSInForLoop);\n                    }\n\n                    lex();\n                    reinterpretExpressionAsPattern(init);\n                    left = init;\n                    right = parseAssignmentExpression();\n                    init = null;\n                    forIn = false;\n                } else {\n                    if (match(',')) {\n                        initSeq = [init];\n                        while (match(',')) {\n                            lex();\n                            initSeq.push(isolateCoverGrammar(parseAssignmentExpression));\n                        }\n                        init = new WrappingNode(initStartToken).finishSequenceExpression(initSeq);\n                    }\n                    expect(';');\n                }\n            }\n        }\n\n        if (typeof left === 'undefined') {\n\n            if (!match(';')) {\n                test = parseExpression();\n            }\n            expect(';');\n\n            if (!match(')')) {\n                update = parseExpression();\n            }\n        }\n\n        expect(')');\n\n        oldInIteration = state.inIteration;\n        state.inIteration = true;\n\n        body = isolateCoverGrammar(parseStatement);\n\n        state.inIteration = oldInIteration;\n\n        return (typeof left === 'undefined') ?\n                node.finishForStatement(init, test, update, body) :\n                forIn ? node.finishForInStatement(left, right, body) :\n                    node.finishForOfStatement(left, right, body);\n    }\n\n    // ECMA-262 13.8 The continue statement\n\n    function parseContinueStatement(node) {\n        var label = null, key;\n\n        expectKeyword('continue');\n\n        // Optimize the most common form: 'continue;'.\n        if (source.charCodeAt(startIndex) === 0x3B) {\n            lex();\n\n            if (!state.inIteration) {\n                throwError(Messages.IllegalContinue);\n            }\n\n            return node.finishContinueStatement(null);\n        }\n\n        if (hasLineTerminator) {\n            if (!state.inIteration) {\n                throwError(Messages.IllegalContinue);\n            }\n\n            return node.finishContinueStatement(null);\n        }\n\n        if (lookahead.type === Token.Identifier) {\n            label = parseVariableIdentifier();\n\n            key = '$' + label.name;\n            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.UnknownLabel, label.name);\n            }\n        }\n\n        consumeSemicolon();\n\n        if (label === null && !state.inIteration) {\n            throwError(Messages.IllegalContinue);\n        }\n\n        return node.finishContinueStatement(label);\n    }\n\n    // ECMA-262 13.9 The break statement\n\n    function parseBreakStatement(node) {\n        var label = null, key;\n\n        expectKeyword('break');\n\n        // Catch the very common case first: immediately a semicolon (U+003B).\n        if (source.charCodeAt(lastIndex) === 0x3B) {\n            lex();\n\n            if (!(state.inIteration || state.inSwitch)) {\n                throwError(Messages.IllegalBreak);\n            }\n\n            return node.finishBreakStatement(null);\n        }\n\n        if (hasLineTerminator) {\n            if (!(state.inIteration || state.inSwitch)) {\n                throwError(Messages.IllegalBreak);\n            }\n        } else if (lookahead.type === Token.Identifier) {\n            label = parseVariableIdentifier();\n\n            key = '$' + label.name;\n            if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.UnknownLabel, label.name);\n            }\n        }\n\n        consumeSemicolon();\n\n        if (label === null && !(state.inIteration || state.inSwitch)) {\n            throwError(Messages.IllegalBreak);\n        }\n\n        return node.finishBreakStatement(label);\n    }\n\n    // ECMA-262 13.10 The return statement\n\n    function parseReturnStatement(node) {\n        var argument = null;\n\n        expectKeyword('return');\n\n        if (!state.inFunctionBody) {\n            tolerateError(Messages.IllegalReturn);\n        }\n\n        // 'return' followed by a space and an identifier is very common.\n        if (source.charCodeAt(lastIndex) === 0x20) {\n            if (isIdentifierStart(source.charCodeAt(lastIndex + 1))) {\n                argument = parseExpression();\n                consumeSemicolon();\n                return node.finishReturnStatement(argument);\n            }\n        }\n\n        if (hasLineTerminator) {\n            // HACK\n            return node.finishReturnStatement(null);\n        }\n\n        if (!match(';')) {\n            if (!match('}') && lookahead.type !== Token.EOF) {\n                argument = parseExpression();\n            }\n        }\n\n        consumeSemicolon();\n\n        return node.finishReturnStatement(argument);\n    }\n\n    // ECMA-262 13.11 The with statement\n\n    function parseWithStatement(node) {\n        var object, body;\n\n        if (strict) {\n            tolerateError(Messages.StrictModeWith);\n        }\n\n        expectKeyword('with');\n\n        expect('(');\n\n        object = parseExpression();\n\n        expect(')');\n\n        body = parseStatement();\n\n        return node.finishWithStatement(object, body);\n    }\n\n    // ECMA-262 13.12 The switch statement\n\n    function parseSwitchCase() {\n        var test, consequent = [], statement, node = new Node();\n\n        if (matchKeyword('default')) {\n            lex();\n            test = null;\n        } else {\n            expectKeyword('case');\n            test = parseExpression();\n        }\n        expect(':');\n\n        while (startIndex < length) {\n            if (match('}') || matchKeyword('default') || matchKeyword('case')) {\n                break;\n            }\n            statement = parseStatementListItem();\n            consequent.push(statement);\n        }\n\n        return node.finishSwitchCase(test, consequent);\n    }\n\n    function parseSwitchStatement(node) {\n        var discriminant, cases, clause, oldInSwitch, defaultFound;\n\n        expectKeyword('switch');\n\n        expect('(');\n\n        discriminant = parseExpression();\n\n        expect(')');\n\n        expect('{');\n\n        cases = [];\n\n        if (match('}')) {\n            lex();\n            return node.finishSwitchStatement(discriminant, cases);\n        }\n\n        oldInSwitch = state.inSwitch;\n        state.inSwitch = true;\n        defaultFound = false;\n\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            clause = parseSwitchCase();\n            if (clause.test === null) {\n                if (defaultFound) {\n                    throwError(Messages.MultipleDefaultsInSwitch);\n                }\n                defaultFound = true;\n            }\n            cases.push(clause);\n        }\n\n        state.inSwitch = oldInSwitch;\n\n        expect('}');\n\n        return node.finishSwitchStatement(discriminant, cases);\n    }\n\n    // ECMA-262 13.14 The throw statement\n\n    function parseThrowStatement(node) {\n        var argument;\n\n        expectKeyword('throw');\n\n        if (hasLineTerminator) {\n            throwError(Messages.NewlineAfterThrow);\n        }\n\n        argument = parseExpression();\n\n        consumeSemicolon();\n\n        return node.finishThrowStatement(argument);\n    }\n\n    // ECMA-262 13.15 The try statement\n\n    function parseCatchClause() {\n        var param, params = [], paramMap = {}, key, i, body, node = new Node();\n\n        expectKeyword('catch');\n\n        expect('(');\n        if (match(')')) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        param = parsePattern(params);\n        for (i = 0; i < params.length; i++) {\n            key = '$' + params[i].value;\n            if (Object.prototype.hasOwnProperty.call(paramMap, key)) {\n                tolerateError(Messages.DuplicateBinding, params[i].value);\n            }\n            paramMap[key] = true;\n        }\n\n        // ECMA-262 12.14.1\n        if (strict && isRestrictedWord(param.name)) {\n            tolerateError(Messages.StrictCatchVariable);\n        }\n\n        expect(')');\n        body = parseBlock();\n        return node.finishCatchClause(param, body);\n    }\n\n    function parseTryStatement(node) {\n        var block, handler = null, finalizer = null;\n\n        expectKeyword('try');\n\n        block = parseBlock();\n\n        if (matchKeyword('catch')) {\n            handler = parseCatchClause();\n        }\n\n        if (matchKeyword('finally')) {\n            lex();\n            finalizer = parseBlock();\n        }\n\n        if (!handler && !finalizer) {\n            throwError(Messages.NoCatchOrFinally);\n        }\n\n        return node.finishTryStatement(block, handler, finalizer);\n    }\n\n    // ECMA-262 13.16 The debugger statement\n\n    function parseDebuggerStatement(node) {\n        expectKeyword('debugger');\n\n        consumeSemicolon();\n\n        return node.finishDebuggerStatement();\n    }\n\n    // 13 Statements\n\n    function parseStatement() {\n        var type = lookahead.type,\n            expr,\n            labeledBody,\n            key,\n            node;\n\n        if (type === Token.EOF) {\n            throwUnexpectedToken(lookahead);\n        }\n\n        if (type === Token.Punctuator && lookahead.value === '{') {\n            return parseBlock();\n        }\n        isAssignmentTarget = isBindingElement = true;\n        node = new Node();\n\n        if (type === Token.Punctuator) {\n            switch (lookahead.value) {\n            case ';':\n                return parseEmptyStatement(node);\n            case '(':\n                return parseExpressionStatement(node);\n            default:\n                break;\n            }\n        } else if (type === Token.Keyword) {\n            switch (lookahead.value) {\n            case 'break':\n                return parseBreakStatement(node);\n            case 'continue':\n                return parseContinueStatement(node);\n            case 'debugger':\n                return parseDebuggerStatement(node);\n            case 'do':\n                return parseDoWhileStatement(node);\n            case 'for':\n                return parseForStatement(node);\n            case 'function':\n                return parseFunctionDeclaration(node);\n            case 'if':\n                return parseIfStatement(node);\n            case 'return':\n                return parseReturnStatement(node);\n            case 'switch':\n                return parseSwitchStatement(node);\n            case 'throw':\n                return parseThrowStatement(node);\n            case 'try':\n                return parseTryStatement(node);\n            case 'var':\n                return parseVariableStatement(node);\n            case 'while':\n                return parseWhileStatement(node);\n            case 'with':\n                return parseWithStatement(node);\n            default:\n                break;\n            }\n        }\n\n        expr = parseExpression();\n\n        // ECMA-262 12.12 Labelled Statements\n        if ((expr.type === Syntax.Identifier) && match(':')) {\n            lex();\n\n            key = '$' + expr.name;\n            if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) {\n                throwError(Messages.Redeclaration, 'Label', expr.name);\n            }\n\n            state.labelSet[key] = true;\n            labeledBody = parseStatement();\n            delete state.labelSet[key];\n            return node.finishLabeledStatement(expr, labeledBody);\n        }\n\n        consumeSemicolon();\n\n        return node.finishExpressionStatement(expr);\n    }\n\n    // ECMA-262 14.1 Function Definition\n\n    function parseFunctionSourceElements() {\n        var statement, body = [], token, directive, firstRestricted,\n            oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount,\n            node = new Node();\n\n        expect('{');\n\n        while (startIndex < length) {\n            if (lookahead.type !== Token.StringLiteral) {\n                break;\n            }\n            token = lookahead;\n\n            statement = parseStatementListItem();\n            body.push(statement);\n            if (statement.expression.type !== Syntax.Literal) {\n                // this is not directive\n                break;\n            }\n            directive = source.slice(token.start + 1, token.end - 1);\n            if (directive === 'use strict') {\n                strict = true;\n                if (firstRestricted) {\n                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);\n                }\n            } else {\n                if (!firstRestricted && token.octal) {\n                    firstRestricted = token;\n                }\n            }\n        }\n\n        oldLabelSet = state.labelSet;\n        oldInIteration = state.inIteration;\n        oldInSwitch = state.inSwitch;\n        oldInFunctionBody = state.inFunctionBody;\n        oldParenthesisCount = state.parenthesizedCount;\n\n        state.labelSet = {};\n        state.inIteration = false;\n        state.inSwitch = false;\n        state.inFunctionBody = true;\n        state.parenthesizedCount = 0;\n\n        while (startIndex < length) {\n            if (match('}')) {\n                break;\n            }\n            body.push(parseStatementListItem());\n        }\n\n        expect('}');\n\n        state.labelSet = oldLabelSet;\n        state.inIteration = oldInIteration;\n        state.inSwitch = oldInSwitch;\n        state.inFunctionBody = oldInFunctionBody;\n        state.parenthesizedCount = oldParenthesisCount;\n\n        return node.finishBlockStatement(body);\n    }\n\n    function validateParam(options, param, name) {\n        var key = '$' + name;\n        if (strict) {\n            if (isRestrictedWord(name)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamName;\n            }\n            if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamDupe;\n            }\n        } else if (!options.firstRestricted) {\n            if (isRestrictedWord(name)) {\n                options.firstRestricted = param;\n                options.message = Messages.StrictParamName;\n            } else if (isStrictModeReservedWord(name)) {\n                options.firstRestricted = param;\n                options.message = Messages.StrictReservedWord;\n            } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {\n                options.stricted = param;\n                options.message = Messages.StrictParamDupe;\n            }\n        }\n        options.paramSet[key] = true;\n    }\n\n    function parseParam(options) {\n        var token, param, params = [], i, def;\n\n        token = lookahead;\n        if (token.value === '...') {\n            param = parseRestElement(params);\n            validateParam(options, param.argument, param.argument.name);\n            options.params.push(param);\n            options.defaults.push(null);\n            return false;\n        }\n\n        param = parsePatternWithDefault(params);\n        for (i = 0; i < params.length; i++) {\n            validateParam(options, params[i], params[i].value);\n        }\n\n        if (param.type === Syntax.AssignmentPattern) {\n            def = param.right;\n            param = param.left;\n            ++options.defaultCount;\n        }\n\n        options.params.push(param);\n        options.defaults.push(def);\n\n        return !match(')');\n    }\n\n    function parseParams(firstRestricted) {\n        var options;\n\n        options = {\n            params: [],\n            defaultCount: 0,\n            defaults: [],\n            firstRestricted: firstRestricted\n        };\n\n        expect('(');\n\n        if (!match(')')) {\n            options.paramSet = {};\n            while (startIndex < length) {\n                if (!parseParam(options)) {\n                    break;\n                }\n                expect(',');\n            }\n        }\n\n        expect(')');\n\n        if (options.defaultCount === 0) {\n            options.defaults = [];\n        }\n\n        return {\n            params: options.params,\n            defaults: options.defaults,\n            stricted: options.stricted,\n            firstRestricted: options.firstRestricted,\n            message: options.message\n        };\n    }\n\n    function parseFunctionDeclaration(node, identifierIsOptional) {\n        var id = null, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict,\n            isGenerator, previousAllowYield;\n\n        previousAllowYield = state.allowYield;\n\n        expectKeyword('function');\n\n        isGenerator = match('*');\n        if (isGenerator) {\n            lex();\n        }\n\n        if (!identifierIsOptional || !match('(')) {\n            token = lookahead;\n            id = parseVariableIdentifier();\n            if (strict) {\n                if (isRestrictedWord(token.value)) {\n                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);\n                }\n            } else {\n                if (isRestrictedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictFunctionName;\n                } else if (isStrictModeReservedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictReservedWord;\n                }\n            }\n        }\n\n        state.allowYield = !isGenerator;\n        tmp = parseParams(firstRestricted);\n        params = tmp.params;\n        defaults = tmp.defaults;\n        stricted = tmp.stricted;\n        firstRestricted = tmp.firstRestricted;\n        if (tmp.message) {\n            message = tmp.message;\n        }\n\n\n        previousStrict = strict;\n        body = parseFunctionSourceElements();\n        if (strict && firstRestricted) {\n            throwUnexpectedToken(firstRestricted, message);\n        }\n        if (strict && stricted) {\n            tolerateUnexpectedToken(stricted, message);\n        }\n\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishFunctionDeclaration(id, params, defaults, body, isGenerator);\n    }\n\n    function parseFunctionExpression() {\n        var token, id = null, stricted, firstRestricted, message, tmp,\n            params = [], defaults = [], body, previousStrict, node = new Node(),\n            isGenerator, previousAllowYield;\n\n        previousAllowYield = state.allowYield;\n\n        expectKeyword('function');\n\n        isGenerator = match('*');\n        if (isGenerator) {\n            lex();\n        }\n\n        state.allowYield = !isGenerator;\n        if (!match('(')) {\n            token = lookahead;\n            id = (!strict && !isGenerator && matchKeyword('yield')) ? parseNonComputedProperty() : parseVariableIdentifier();\n            if (strict) {\n                if (isRestrictedWord(token.value)) {\n                    tolerateUnexpectedToken(token, Messages.StrictFunctionName);\n                }\n            } else {\n                if (isRestrictedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictFunctionName;\n                } else if (isStrictModeReservedWord(token.value)) {\n                    firstRestricted = token;\n                    message = Messages.StrictReservedWord;\n                }\n            }\n        }\n\n        tmp = parseParams(firstRestricted);\n        params = tmp.params;\n        defaults = tmp.defaults;\n        stricted = tmp.stricted;\n        firstRestricted = tmp.firstRestricted;\n        if (tmp.message) {\n            message = tmp.message;\n        }\n\n        previousStrict = strict;\n        body = parseFunctionSourceElements();\n        if (strict && firstRestricted) {\n            throwUnexpectedToken(firstRestricted, message);\n        }\n        if (strict && stricted) {\n            tolerateUnexpectedToken(stricted, message);\n        }\n        strict = previousStrict;\n        state.allowYield = previousAllowYield;\n\n        return node.finishFunctionExpression(id, params, defaults, body, isGenerator);\n    }\n\n    // ECMA-262 14.5 Class Definitions\n\n    function parseClassBody() {\n        var classBody, token, isStatic, hasConstructor = false, body, method, computed, key;\n\n        classBody = new Node();\n\n        expect('{');\n        body = [];\n        while (!match('}')) {\n            if (match(';')) {\n                lex();\n            } else {\n                method = new Node();\n                token = lookahead;\n                isStatic = false;\n                computed = match('[');\n                if (match('*')) {\n                    lex();\n                } else {\n                    key = parseObjectPropertyKey();\n                    if (key.name === 'static' && (lookaheadPropertyName() || match('*'))) {\n                        token = lookahead;\n                        isStatic = true;\n                        computed = match('[');\n                        if (match('*')) {\n                            lex();\n                        } else {\n                            key = parseObjectPropertyKey();\n                        }\n                    }\n                }\n                method = tryParseMethodDefinition(token, key, computed, method);\n                if (method) {\n                    method['static'] = isStatic; // jscs:ignore requireDotNotation\n                    if (method.kind === 'init') {\n                        method.kind = 'method';\n                    }\n                    if (!isStatic) {\n                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'constructor') {\n                            if (method.kind !== 'method' || !method.method || method.value.generator) {\n                                throwUnexpectedToken(token, Messages.ConstructorSpecialMethod);\n                            }\n                            if (hasConstructor) {\n                                throwUnexpectedToken(token, Messages.DuplicateConstructor);\n                            } else {\n                                hasConstructor = true;\n                            }\n                            method.kind = 'constructor';\n                        }\n                    } else {\n                        if (!method.computed && (method.key.name || method.key.value.toString()) === 'prototype') {\n                            throwUnexpectedToken(token, Messages.StaticPrototype);\n                        }\n                    }\n                    method.type = Syntax.MethodDefinition;\n                    delete method.method;\n                    delete method.shorthand;\n                    body.push(method);\n                } else {\n                    throwUnexpectedToken(lookahead);\n                }\n            }\n        }\n        lex();\n        return classBody.finishClassBody(body);\n    }\n\n    function parseClassDeclaration(identifierIsOptional) {\n        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;\n        strict = true;\n\n        expectKeyword('class');\n\n        if (!identifierIsOptional || lookahead.type === Token.Identifier) {\n            id = parseVariableIdentifier();\n        }\n\n        if (matchKeyword('extends')) {\n            lex();\n            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);\n        }\n        classBody = parseClassBody();\n        strict = previousStrict;\n\n        return classNode.finishClassDeclaration(id, superClass, classBody);\n    }\n\n    function parseClassExpression() {\n        var id = null, superClass = null, classNode = new Node(), classBody, previousStrict = strict;\n        strict = true;\n\n        expectKeyword('class');\n\n        if (lookahead.type === Token.Identifier) {\n            id = parseVariableIdentifier();\n        }\n\n        if (matchKeyword('extends')) {\n            lex();\n            superClass = isolateCoverGrammar(parseLeftHandSideExpressionAllowCall);\n        }\n        classBody = parseClassBody();\n        strict = previousStrict;\n\n        return classNode.finishClassExpression(id, superClass, classBody);\n    }\n\n    // ECMA-262 15.2 Modules\n\n    function parseModuleSpecifier() {\n        var node = new Node();\n\n        if (lookahead.type !== Token.StringLiteral) {\n            throwError(Messages.InvalidModuleSpecifier);\n        }\n        return node.finishLiteral(lex());\n    }\n\n    // ECMA-262 15.2.3 Exports\n\n    function parseExportSpecifier() {\n        var exported, local, node = new Node(), def;\n        if (matchKeyword('default')) {\n            // export {default} from 'something';\n            def = new Node();\n            lex();\n            local = def.finishIdentifier('default');\n        } else {\n            local = parseVariableIdentifier();\n        }\n        if (matchContextualKeyword('as')) {\n            lex();\n            exported = parseNonComputedProperty();\n        }\n        return node.finishExportSpecifier(local, exported);\n    }\n\n    function parseExportNamedDeclaration(node) {\n        var declaration = null,\n            isExportFromIdentifier,\n            src = null, specifiers = [];\n\n        // non-default export\n        if (lookahead.type === Token.Keyword) {\n            // covers:\n            // export var f = 1;\n            switch (lookahead.value) {\n                case 'let':\n                case 'const':\n                    declaration = parseLexicalDeclaration({inFor: false});\n                    return node.finishExportNamedDeclaration(declaration, specifiers, null);\n                case 'var':\n                case 'class':\n                case 'function':\n                    declaration = parseStatementListItem();\n                    return node.finishExportNamedDeclaration(declaration, specifiers, null);\n            }\n        }\n\n        expect('{');\n        while (!match('}')) {\n            isExportFromIdentifier = isExportFromIdentifier || matchKeyword('default');\n            specifiers.push(parseExportSpecifier());\n            if (!match('}')) {\n                expect(',');\n                if (match('}')) {\n                    break;\n                }\n            }\n        }\n        expect('}');\n\n        if (matchContextualKeyword('from')) {\n            // covering:\n            // export {default} from 'foo';\n            // export {foo} from 'foo';\n            lex();\n            src = parseModuleSpecifier();\n            consumeSemicolon();\n        } else if (isExportFromIdentifier) {\n            // covering:\n            // export {default}; // missing fromClause\n            throwError(lookahead.value ?\n                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n        } else {\n            // cover\n            // export {foo};\n            consumeSemicolon();\n        }\n        return node.finishExportNamedDeclaration(declaration, specifiers, src);\n    }\n\n    function parseExportDefaultDeclaration(node) {\n        var declaration = null,\n            expression = null;\n\n        // covers:\n        // export default ...\n        expectKeyword('default');\n\n        if (matchKeyword('function')) {\n            // covers:\n            // export default function foo () {}\n            // export default function () {}\n            declaration = parseFunctionDeclaration(new Node(), true);\n            return node.finishExportDefaultDeclaration(declaration);\n        }\n        if (matchKeyword('class')) {\n            declaration = parseClassDeclaration(true);\n            return node.finishExportDefaultDeclaration(declaration);\n        }\n\n        if (matchContextualKeyword('from')) {\n            throwError(Messages.UnexpectedToken, lookahead.value);\n        }\n\n        // covers:\n        // export default {};\n        // export default [];\n        // export default (1 + 2);\n        if (match('{')) {\n            expression = parseObjectInitializer();\n        } else if (match('[')) {\n            expression = parseArrayInitializer();\n        } else {\n            expression = parseAssignmentExpression();\n        }\n        consumeSemicolon();\n        return node.finishExportDefaultDeclaration(expression);\n    }\n\n    function parseExportAllDeclaration(node) {\n        var src;\n\n        // covers:\n        // export * from 'foo';\n        expect('*');\n        if (!matchContextualKeyword('from')) {\n            throwError(lookahead.value ?\n                    Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n        }\n        lex();\n        src = parseModuleSpecifier();\n        consumeSemicolon();\n\n        return node.finishExportAllDeclaration(src);\n    }\n\n    function parseExportDeclaration() {\n        var node = new Node();\n        if (state.inFunctionBody) {\n            throwError(Messages.IllegalExportDeclaration);\n        }\n\n        expectKeyword('export');\n\n        if (matchKeyword('default')) {\n            return parseExportDefaultDeclaration(node);\n        }\n        if (match('*')) {\n            return parseExportAllDeclaration(node);\n        }\n        return parseExportNamedDeclaration(node);\n    }\n\n    // ECMA-262 15.2.2 Imports\n\n    function parseImportSpecifier() {\n        // import {<foo as bar>} ...;\n        var local, imported, node = new Node();\n\n        imported = parseNonComputedProperty();\n        if (matchContextualKeyword('as')) {\n            lex();\n            local = parseVariableIdentifier();\n        }\n\n        return node.finishImportSpecifier(local, imported);\n    }\n\n    function parseNamedImports() {\n        var specifiers = [];\n        // {foo, bar as bas}\n        expect('{');\n        while (!match('}')) {\n            specifiers.push(parseImportSpecifier());\n            if (!match('}')) {\n                expect(',');\n                if (match('}')) {\n                    break;\n                }\n            }\n        }\n        expect('}');\n        return specifiers;\n    }\n\n    function parseImportDefaultSpecifier() {\n        // import <foo> ...;\n        var local, node = new Node();\n\n        local = parseNonComputedProperty();\n\n        return node.finishImportDefaultSpecifier(local);\n    }\n\n    function parseImportNamespaceSpecifier() {\n        // import <* as foo> ...;\n        var local, node = new Node();\n\n        expect('*');\n        if (!matchContextualKeyword('as')) {\n            throwError(Messages.NoAsAfterImportNamespace);\n        }\n        lex();\n        local = parseNonComputedProperty();\n\n        return node.finishImportNamespaceSpecifier(local);\n    }\n\n    function parseImportDeclaration() {\n        var specifiers = [], src, node = new Node();\n\n        if (state.inFunctionBody) {\n            throwError(Messages.IllegalImportDeclaration);\n        }\n\n        expectKeyword('import');\n\n        if (lookahead.type === Token.StringLiteral) {\n            // import 'foo';\n            src = parseModuleSpecifier();\n        } else {\n\n            if (match('{')) {\n                // import {bar}\n                specifiers = specifiers.concat(parseNamedImports());\n            } else if (match('*')) {\n                // import * as foo\n                specifiers.push(parseImportNamespaceSpecifier());\n            } else if (isIdentifierName(lookahead) && !matchKeyword('default')) {\n                // import foo\n                specifiers.push(parseImportDefaultSpecifier());\n                if (match(',')) {\n                    lex();\n                    if (match('*')) {\n                        // import foo, * as foo\n                        specifiers.push(parseImportNamespaceSpecifier());\n                    } else if (match('{')) {\n                        // import foo, {bar}\n                        specifiers = specifiers.concat(parseNamedImports());\n                    } else {\n                        throwUnexpectedToken(lookahead);\n                    }\n                }\n            } else {\n                throwUnexpectedToken(lex());\n            }\n\n            if (!matchContextualKeyword('from')) {\n                throwError(lookahead.value ?\n                        Messages.UnexpectedToken : Messages.MissingFromClause, lookahead.value);\n            }\n            lex();\n            src = parseModuleSpecifier();\n        }\n\n        consumeSemicolon();\n        return node.finishImportDeclaration(specifiers, src);\n    }\n\n    // ECMA-262 15.1 Scripts\n\n    function parseScriptBody() {\n        var statement, body = [], token, directive, firstRestricted;\n\n        while (startIndex < length) {\n            token = lookahead;\n            if (token.type !== Token.StringLiteral) {\n                break;\n            }\n\n            statement = parseStatementListItem();\n            body.push(statement);\n            if (statement.expression.type !== Syntax.Literal) {\n                // this is not directive\n                break;\n            }\n            directive = source.slice(token.start + 1, token.end - 1);\n            if (directive === 'use strict') {\n                strict = true;\n                if (firstRestricted) {\n                    tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral);\n                }\n            } else {\n                if (!firstRestricted && token.octal) {\n                    firstRestricted = token;\n                }\n            }\n        }\n\n        while (startIndex < length) {\n            statement = parseStatementListItem();\n            /* istanbul ignore if */\n            if (typeof statement === 'undefined') {\n                break;\n            }\n            body.push(statement);\n        }\n        return body;\n    }\n\n    function parseProgram() {\n        var body, node;\n\n        peek();\n        node = new Node();\n\n        body = parseScriptBody();\n        return node.finishProgram(body, state.sourceType);\n    }\n\n    function filterTokenLocation() {\n        var i, entry, token, tokens = [];\n\n        for (i = 0; i < extra.tokens.length; ++i) {\n            entry = extra.tokens[i];\n            token = {\n                type: entry.type,\n                value: entry.value\n            };\n            if (entry.regex) {\n                token.regex = {\n                    pattern: entry.regex.pattern,\n                    flags: entry.regex.flags\n                };\n            }\n            if (extra.range) {\n                token.range = entry.range;\n            }\n            if (extra.loc) {\n                token.loc = entry.loc;\n            }\n            tokens.push(token);\n        }\n\n        extra.tokens = tokens;\n    }\n\n    function tokenize(code, options, delegate) {\n        var toString,\n            tokens;\n\n        toString = String;\n        if (typeof code !== 'string' && !(code instanceof String)) {\n            code = toString(code);\n        }\n\n        source = code;\n        index = 0;\n        lineNumber = (source.length > 0) ? 1 : 0;\n        lineStart = 0;\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n        length = source.length;\n        lookahead = null;\n        state = {\n            allowIn: true,\n            allowYield: true,\n            labelSet: {},\n            inFunctionBody: false,\n            inIteration: false,\n            inSwitch: false,\n            lastCommentStart: -1,\n            curlyStack: []\n        };\n\n        extra = {};\n\n        // Options matching.\n        options = options || {};\n\n        // Of course we collect tokens here.\n        options.tokens = true;\n        extra.tokens = [];\n        extra.tokenValues = [];\n        extra.tokenize = true;\n        extra.delegate = delegate;\n\n        // The following two fields are necessary to compute the Regex tokens.\n        extra.openParenToken = -1;\n        extra.openCurlyToken = -1;\n\n        extra.range = (typeof options.range === 'boolean') && options.range;\n        extra.loc = (typeof options.loc === 'boolean') && options.loc;\n\n        if (typeof options.comment === 'boolean' && options.comment) {\n            extra.comments = [];\n        }\n        if (typeof options.tolerant === 'boolean' && options.tolerant) {\n            extra.errors = [];\n        }\n\n        try {\n            peek();\n            if (lookahead.type === Token.EOF) {\n                return extra.tokens;\n            }\n\n            lex();\n            while (lookahead.type !== Token.EOF) {\n                try {\n                    lex();\n                } catch (lexError) {\n                    if (extra.errors) {\n                        recordError(lexError);\n                        // We have to break on the first error\n                        // to avoid infinite loops.\n                        break;\n                    } else {\n                        throw lexError;\n                    }\n                }\n            }\n\n            tokens = extra.tokens;\n            if (typeof extra.errors !== 'undefined') {\n                tokens.errors = extra.errors;\n            }\n        } catch (e) {\n            throw e;\n        } finally {\n            extra = {};\n        }\n        return tokens;\n    }\n\n    function parse(code, options) {\n        var program, toString;\n\n        toString = String;\n        if (typeof code !== 'string' && !(code instanceof String)) {\n            code = toString(code);\n        }\n\n        source = code;\n        index = 0;\n        lineNumber = (source.length > 0) ? 1 : 0;\n        lineStart = 0;\n        startIndex = index;\n        startLineNumber = lineNumber;\n        startLineStart = lineStart;\n        length = source.length;\n        lookahead = null;\n        state = {\n            allowIn: true,\n            allowYield: true,\n            labelSet: {},\n            inFunctionBody: false,\n            inIteration: false,\n            inSwitch: false,\n            lastCommentStart: -1,\n            curlyStack: [],\n            sourceType: 'script'\n        };\n        strict = false;\n\n        extra = {};\n        if (typeof options !== 'undefined') {\n            extra.range = (typeof options.range === 'boolean') && options.range;\n            extra.loc = (typeof options.loc === 'boolean') && options.loc;\n            extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment;\n\n            if (extra.loc && options.source !== null && options.source !== undefined) {\n                extra.source = toString(options.source);\n            }\n\n            if (typeof options.tokens === 'boolean' && options.tokens) {\n                extra.tokens = [];\n            }\n            if (typeof options.comment === 'boolean' && options.comment) {\n                extra.comments = [];\n            }\n            if (typeof options.tolerant === 'boolean' && options.tolerant) {\n                extra.errors = [];\n            }\n            if (extra.attachComment) {\n                extra.range = true;\n                extra.comments = [];\n                extra.bottomRightStack = [];\n                extra.trailingComments = [];\n                extra.leadingComments = [];\n            }\n            if (options.sourceType === 'module') {\n                // very restrictive condition for now\n                state.sourceType = options.sourceType;\n                strict = true;\n            }\n        }\n\n        try {\n            program = parseProgram();\n            if (typeof extra.comments !== 'undefined') {\n                program.comments = extra.comments;\n            }\n            if (typeof extra.tokens !== 'undefined') {\n                filterTokenLocation();\n                program.tokens = extra.tokens;\n            }\n            if (typeof extra.errors !== 'undefined') {\n                program.errors = extra.errors;\n            }\n        } catch (e) {\n            throw e;\n        } finally {\n            extra = {};\n        }\n\n        return program;\n    }\n\n    // Sync with *.json manifests.\n    exports.version = '2.7.1';\n\n    exports.tokenize = tokenize;\n\n    exports.parse = parse;\n\n    // Deep copy.\n    /* istanbul ignore next */\n    exports.Syntax = (function () {\n        var name, types = {};\n\n        if (typeof Object.create === 'function') {\n            types = Object.create(null);\n        }\n\n        for (name in Syntax) {\n            if (Syntax.hasOwnProperty(name)) {\n                types[name] = Syntax[name];\n            }\n        }\n\n        if (typeof Object.freeze === 'function') {\n            Object.freeze(types);\n        }\n\n        return types;\n    }());\n\n}));\n/* vim: set sw=4 ts=4 et tw=80 : */\n",
+    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nfunction EventEmitter() {\n  this._events = this._events || {};\n  this._maxListeners = this._maxListeners || undefined;\n}\nmodule.exports = EventEmitter;\n\n// Backwards-compat with node 0.10.x\nEventEmitter.EventEmitter = EventEmitter;\n\nEventEmitter.prototype._events = undefined;\nEventEmitter.prototype._maxListeners = undefined;\n\n// By default EventEmitters will print a warning if more than 10 listeners are\n// added to it. This is a useful default which helps finding memory leaks.\nEventEmitter.defaultMaxListeners = 10;\n\n// Obviously not all Emitters should be limited to 10. This function allows\n// that to be increased. Set to zero for unlimited.\nEventEmitter.prototype.setMaxListeners = function(n) {\n  if (!isNumber(n) || n < 0 || isNaN(n))\n    throw TypeError('n must be a positive number');\n  this._maxListeners = n;\n  return this;\n};\n\nEventEmitter.prototype.emit = function(type) {\n  var er, handler, len, args, i, listeners;\n\n  if (!this._events)\n    this._events = {};\n\n  // If there is no 'error' event listener then throw.\n  if (type === 'error') {\n    if (!this._events.error ||\n        (isObject(this._events.error) && !this._events.error.length)) {\n      er = arguments[1];\n      if (er instanceof Error) {\n        throw er; // Unhandled 'error' event\n      }\n      throw TypeError('Uncaught, unspecified \"error\" event.');\n    }\n  }\n\n  handler = this._events[type];\n\n  if (isUndefined(handler))\n    return false;\n\n  if (isFunction(handler)) {\n    switch (arguments.length) {\n      // fast cases\n      case 1:\n        handler.call(this);\n        break;\n      case 2:\n        handler.call(this, arguments[1]);\n        break;\n      case 3:\n        handler.call(this, arguments[1], arguments[2]);\n        break;\n      // slower\n      default:\n        args = Array.prototype.slice.call(arguments, 1);\n        handler.apply(this, args);\n    }\n  } else if (isObject(handler)) {\n    args = Array.prototype.slice.call(arguments, 1);\n    listeners = handler.slice();\n    len = listeners.length;\n    for (i = 0; i < len; i++)\n      listeners[i].apply(this, args);\n  }\n\n  return true;\n};\n\nEventEmitter.prototype.addListener = function(type, listener) {\n  var m;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events)\n    this._events = {};\n\n  // To avoid recursion in the case that type === \"newListener\"! Before\n  // adding it to the listeners, first emit \"newListener\".\n  if (this._events.newListener)\n    this.emit('newListener', type,\n              isFunction(listener.listener) ?\n              listener.listener : listener);\n\n  if (!this._events[type])\n    // Optimize the case of one listener. Don't need the extra array object.\n    this._events[type] = listener;\n  else if (isObject(this._events[type]))\n    // If we've already got an array, just append.\n    this._events[type].push(listener);\n  else\n    // Adding the second element, need to change to array.\n    this._events[type] = [this._events[type], listener];\n\n  // Check for listener leak\n  if (isObject(this._events[type]) && !this._events[type].warned) {\n    if (!isUndefined(this._maxListeners)) {\n      m = this._maxListeners;\n    } else {\n      m = EventEmitter.defaultMaxListeners;\n    }\n\n    if (m && m > 0 && this._events[type].length > m) {\n      this._events[type].warned = true;\n      console.error('(node) warning: possible EventEmitter memory ' +\n                    'leak detected. %d listeners added. ' +\n                    'Use emitter.setMaxListeners() to increase limit.',\n                    this._events[type].length);\n      if (typeof console.trace === 'function') {\n        // not supported in IE 10\n        console.trace();\n      }\n    }\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.once = function(type, listener) {\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  var fired = false;\n\n  function g() {\n    this.removeListener(type, g);\n\n    if (!fired) {\n      fired = true;\n      listener.apply(this, arguments);\n    }\n  }\n\n  g.listener = listener;\n  this.on(type, g);\n\n  return this;\n};\n\n// emits a 'removeListener' event iff the listener was removed\nEventEmitter.prototype.removeListener = function(type, listener) {\n  var list, position, length, i;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events || !this._events[type])\n    return this;\n\n  list = this._events[type];\n  length = list.length;\n  position = -1;\n\n  if (list === listener ||\n      (isFunction(list.listener) && list.listener === listener)) {\n    delete this._events[type];\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n\n  } else if (isObject(list)) {\n    for (i = length; i-- > 0;) {\n      if (list[i] === listener ||\n          (list[i].listener && list[i].listener === listener)) {\n        position = i;\n        break;\n      }\n    }\n\n    if (position < 0)\n      return this;\n\n    if (list.length === 1) {\n      list.length = 0;\n      delete this._events[type];\n    } else {\n      list.splice(position, 1);\n    }\n\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.removeAllListeners = function(type) {\n  var key, listeners;\n\n  if (!this._events)\n    return this;\n\n  // not listening for removeListener, no need to emit\n  if (!this._events.removeListener) {\n    if (arguments.length === 0)\n      this._events = {};\n    else if (this._events[type])\n      delete this._events[type];\n    return this;\n  }\n\n  // emit removeListener for all listeners on all events\n  if (arguments.length === 0) {\n    for (key in this._events) {\n      if (key === 'removeListener') continue;\n      this.removeAllListeners(key);\n    }\n    this.removeAllListeners('removeListener');\n    this._events = {};\n    return this;\n  }\n\n  listeners = this._events[type];\n\n  if (isFunction(listeners)) {\n    this.removeListener(type, listeners);\n  } else if (listeners) {\n    // LIFO order\n    while (listeners.length)\n      this.removeListener(type, listeners[listeners.length - 1]);\n  }\n  delete this._events[type];\n\n  return this;\n};\n\nEventEmitter.prototype.listeners = function(type) {\n  var ret;\n  if (!this._events || !this._events[type])\n    ret = [];\n  else if (isFunction(this._events[type]))\n    ret = [this._events[type]];\n  else\n    ret = this._events[type].slice();\n  return ret;\n};\n\nEventEmitter.prototype.listenerCount = function(type) {\n  if (this._events) {\n    var evlistener = this._events[type];\n\n    if (isFunction(evlistener))\n      return 1;\n    else if (evlistener)\n      return evlistener.length;\n  }\n  return 0;\n};\n\nEventEmitter.listenerCount = function(emitter, type) {\n  return emitter.listenerCount(type);\n};\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\n",
     "var http = require('http');\n\nvar https = module.exports;\n\nfor (var key in http) {\n    if (http.hasOwnProperty(key)) https[key] = http[key];\n};\n\nhttps.request = function (params, cb) {\n    if (!params) params = {};\n    params.scheme = 'https';\n    params.protocol = 'https:';\n    return http.request.call(this, params, cb);\n}\n",
     "exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = nBytes * 8 - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = nBytes * 8 - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = (value * c - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n",
-    "\nvar indexOf = [].indexOf;\n\nmodule.exports = function(arr, obj){\n  if (indexOf) return arr.indexOf(obj);\n  for (var i = 0; i < arr.length; ++i) {\n    if (arr[i] === obj) return i;\n  }\n  return -1;\n};",
+    "/*!\n * node-inherit\n * Copyright(c) 2011 Dmitry Filatov <dfilatov@yandex-team.ru>\n * MIT Licensed\n */\n\nmodule.exports = require('./lib/inherit');\n",
+    "/**\n * @module inherit\n * @version 2.2.2\n * @author Filatov Dmitry <dfilatov@yandex-team.ru>\n * @description This module provides some syntax sugar for \"class\" declarations, constructors, mixins, \"super\" calls and static members.\n */\n\n(function(global) {\n\nvar hasIntrospection = (function(){'_';}).toString().indexOf('_') > -1,\n    emptyBase = function() {},\n    hasOwnProperty = Object.prototype.hasOwnProperty,\n    objCreate = Object.create || function(ptp) {\n        var inheritance = function() {};\n        inheritance.prototype = ptp;\n        return new inheritance();\n    },\n    objKeys = Object.keys || function(obj) {\n        var res = [];\n        for(var i in obj) {\n            hasOwnProperty.call(obj, i) && res.push(i);\n        }\n        return res;\n    },\n    extend = function(o1, o2) {\n        for(var i in o2) {\n            hasOwnProperty.call(o2, i) && (o1[i] = o2[i]);\n        }\n\n        return o1;\n    },\n    toStr = Object.prototype.toString,\n    isArray = Array.isArray || function(obj) {\n        return toStr.call(obj) === '[object Array]';\n    },\n    isFunction = function(obj) {\n        return toStr.call(obj) === '[object Function]';\n    },\n    noOp = function() {},\n    needCheckProps = true,\n    testPropObj = { toString : '' };\n\nfor(var i in testPropObj) { // fucking ie hasn't toString, valueOf in for\n    testPropObj.hasOwnProperty(i) && (needCheckProps = false);\n}\n\nvar specProps = needCheckProps? ['toString', 'valueOf'] : null;\n\nfunction getPropList(obj) {\n    var res = objKeys(obj);\n    if(needCheckProps) {\n        var specProp, i = 0;\n        while(specProp = specProps[i++]) {\n            obj.hasOwnProperty(specProp) && res.push(specProp);\n        }\n    }\n\n    return res;\n}\n\nfunction override(base, res, add) {\n    var addList = getPropList(add),\n        j = 0, len = addList.length,\n        name, prop;\n    while(j < len) {\n        if((name = addList[j++]) === '__self') {\n            continue;\n        }\n        prop = add[name];\n        if(isFunction(prop) &&\n                (!hasIntrospection || prop.toString().indexOf('.__base') > -1)) {\n            res[name] = (function(name, prop) {\n                var baseMethod = base[name]?\n                        base[name] :\n                        name === '__constructor'? // case of inheritance from plane function\n                            res.__self.__parent :\n                            noOp;\n                return function() {\n                    var baseSaved = this.__base;\n                    this.__base = baseMethod;\n                    var res = prop.apply(this, arguments);\n                    this.__base = baseSaved;\n                    return res;\n                };\n            })(name, prop);\n        } else {\n            res[name] = prop;\n        }\n    }\n}\n\nfunction applyMixins(mixins, res) {\n    var i = 1, mixin;\n    while(mixin = mixins[i++]) {\n        res?\n            isFunction(mixin)?\n                inherit.self(res, mixin.prototype, mixin) :\n                inherit.self(res, mixin) :\n            res = isFunction(mixin)?\n                inherit(mixins[0], mixin.prototype, mixin) :\n                inherit(mixins[0], mixin);\n    }\n    return res || mixins[0];\n}\n\n/**\n* Creates class\n* @exports\n* @param {Function|Array} [baseClass|baseClassAndMixins] class (or class and mixins) to inherit from\n* @param {Object} prototypeFields\n* @param {Object} [staticFields]\n* @returns {Function} class\n*/\nfunction inherit() {\n    var args = arguments,\n        withMixins = isArray(args[0]),\n        hasBase = withMixins || isFunction(args[0]),\n        base = hasBase? withMixins? applyMixins(args[0]) : args[0] : emptyBase,\n        props = args[hasBase? 1 : 0] || {},\n        staticProps = args[hasBase? 2 : 1],\n        res = props.__constructor || (hasBase && base.prototype.__constructor)?\n            function() {\n                return this.__constructor.apply(this, arguments);\n            } :\n            hasBase?\n                function() {\n                    return base.apply(this, arguments);\n                } :\n                function() {};\n\n    if(!hasBase) {\n        res.prototype = props;\n        res.prototype.__self = res.prototype.constructor = res;\n        return extend(res, staticProps);\n    }\n\n    extend(res, base);\n\n    res.__parent = base;\n\n    var basePtp = base.prototype,\n        resPtp = res.prototype = objCreate(basePtp);\n\n    resPtp.__self = resPtp.constructor = res;\n\n    props && override(basePtp, resPtp, props);\n    staticProps && override(base, res, staticProps);\n\n    return res;\n}\n\ninherit.self = function() {\n    var args = arguments,\n        withMixins = isArray(args[0]),\n        base = withMixins? applyMixins(args[0], args[0][0]) : args[0],\n        props = args[1],\n        staticProps = args[2],\n        basePtp = base.prototype;\n\n    props && override(basePtp, basePtp, props);\n    staticProps && override(base, base, staticProps);\n\n    return base;\n};\n\nvar defineAsGlobal = true;\nif(typeof exports === 'object') {\n    module.exports = inherit;\n    defineAsGlobal = false;\n}\n\nif(typeof modules === 'object') {\n    modules.define('inherit', function(provide) {\n        provide(inherit);\n    });\n    defineAsGlobal = false;\n}\n\nif(typeof define === 'function') {\n    define(function(require, exports, module) {\n        module.exports = inherit;\n    });\n    defineAsGlobal = false;\n}\n\ndefineAsGlobal && (global.inherit = inherit);\n\n})(this);\n",
     "if (typeof Object.create === 'function') {\n  // implementation from standard node.js 'util' module\n  module.exports = function inherits(ctor, superCtor) {\n    ctor.super_ = superCtor\n    ctor.prototype = Object.create(superCtor.prototype, {\n      constructor: {\n        value: ctor,\n        enumerable: false,\n        writable: true,\n        configurable: true\n      }\n    });\n  };\n} else {\n  // old school shim for old browsers\n  module.exports = function inherits(ctor, superCtor) {\n    ctor.super_ = superCtor\n    var TempCtor = function () {}\n    TempCtor.prototype = superCtor.prototype\n    ctor.prototype = new TempCtor()\n    ctor.prototype.constructor = ctor\n  }\n}\n",
-    "\n/**\n * isArray\n */\n\nvar isArray = Array.isArray;\n\n/**\n * toString\n */\n\nvar str = Object.prototype.toString;\n\n/**\n * Whether or not the given `val`\n * is an array.\n *\n * example:\n *\n *        isArray([]);\n *        // > true\n *        isArray(arguments);\n *        // > false\n *        isArray('');\n *        // > false\n *\n * @param {mixed} val\n * @return {bool}\n */\n\nmodule.exports = isArray || function (val) {\n  return !! val && '[object Array]' == str.call(val);\n};\n",
     "/**\n * Determine if an object is Buffer\n *\n * Author:   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>\n * License:  MIT\n *\n * `npm install is-buffer`\n */\n\nmodule.exports = function (obj) {\n  return !!(obj != null &&\n    (obj._isBuffer || // For Safari 5-7 (missing Object.prototype.constructor)\n      (obj.constructor &&\n      typeof obj.constructor.isBuffer === 'function' &&\n      obj.constructor.isBuffer(obj))\n    ))\n}\n",
     "module.exports = Array.isArray || function (arr) {\n  return Object.prototype.toString.call(arr) == '[object Array]';\n};\n",
     "'use strict';\n\n\nvar yaml = require('./lib/js-yaml.js');\n\n\nmodule.exports = yaml;\n",
     "'use strict';\n\n\nvar loader = require('./js-yaml/loader');\nvar dumper = require('./js-yaml/dumper');\n\n\nfunction deprecated(name) {\n  return function () {\n    throw new Error('Function ' + name + ' is deprecated and cannot be used.');\n  };\n}\n\n\nmodule.exports.Type                = require('./js-yaml/type');\nmodule.exports.Schema              = require('./js-yaml/schema');\nmodule.exports.FAILSAFE_SCHEMA     = require('./js-yaml/schema/failsafe');\nmodule.exports.JSON_SCHEMA         = require('./js-yaml/schema/json');\nmodule.exports.CORE_SCHEMA         = require('./js-yaml/schema/core');\nmodule.exports.DEFAULT_SAFE_SCHEMA = require('./js-yaml/schema/default_safe');\nmodule.exports.DEFAULT_FULL_SCHEMA = require('./js-yaml/schema/default_full');\nmodule.exports.load                = loader.load;\nmodule.exports.loadAll             = loader.loadAll;\nmodule.exports.safeLoad            = loader.safeLoad;\nmodule.exports.safeLoadAll         = loader.safeLoadAll;\nmodule.exports.dump                = dumper.dump;\nmodule.exports.safeDump            = dumper.safeDump;\nmodule.exports.YAMLException       = require('./js-yaml/exception');\n\n// Deprecated schema names from JS-YAML 2.0.x\nmodule.exports.MINIMAL_SCHEMA = require('./js-yaml/schema/failsafe');\nmodule.exports.SAFE_SCHEMA    = require('./js-yaml/schema/default_safe');\nmodule.exports.DEFAULT_SCHEMA = require('./js-yaml/schema/default_full');\n\n// Deprecated functions from JS-YAML 1.x.x\nmodule.exports.scan           = deprecated('scan');\nmodule.exports.parse          = deprecated('parse');\nmodule.exports.compose        = deprecated('compose');\nmodule.exports.addConstructor = deprecated('addConstructor');\n",
     "'use strict';\n\n\nfunction isNothing(subject) {\n  return (typeof subject === 'undefined') || (null === subject);\n}\n\n\nfunction isObject(subject) {\n  return (typeof subject === 'object') && (null !== subject);\n}\n\n\nfunction toArray(sequence) {\n  if (Array.isArray(sequence)) {\n    return sequence;\n  } else if (isNothing(sequence)) {\n    return [];\n  }\n  return [ sequence ];\n}\n\n\nfunction extend(target, source) {\n  var index, length, key, sourceKeys;\n\n  if (source) {\n    sourceKeys = Object.keys(source);\n\n    for (index = 0, length = sourceKeys.length; index < length; index += 1) {\n      key = sourceKeys[index];\n      target[key] = source[key];\n    }\n  }\n\n  return target;\n}\n\n\nfunction repeat(string, count) {\n  var result = '', cycle;\n\n  for (cycle = 0; cycle < count; cycle += 1) {\n    result += string;\n  }\n\n  return result;\n}\n\n\nfunction isNegativeZero(number) {\n  return (0 === number) && (Number.NEGATIVE_INFINITY === 1 / number);\n}\n\n\nmodule.exports.isNothing      = isNothing;\nmodule.exports.isObject       = isObject;\nmodule.exports.toArray        = toArray;\nmodule.exports.repeat         = repeat;\nmodule.exports.isNegativeZero = isNegativeZero;\nmodule.exports.extend         = extend;\n",
-    "'use strict';\n\n/*eslint-disable no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\n\nvar _toString       = Object.prototype.toString;\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\nvar CHAR_TAB                  = 0x09; /* Tab */\nvar CHAR_LINE_FEED            = 0x0A; /* LF */\nvar CHAR_CARRIAGE_RETURN      = 0x0D; /* CR */\nvar CHAR_SPACE                = 0x20; /* Space */\nvar CHAR_EXCLAMATION          = 0x21; /* ! */\nvar CHAR_DOUBLE_QUOTE         = 0x22; /* \" */\nvar CHAR_SHARP                = 0x23; /* # */\nvar CHAR_PERCENT              = 0x25; /* % */\nvar CHAR_AMPERSAND            = 0x26; /* & */\nvar CHAR_SINGLE_QUOTE         = 0x27; /* ' */\nvar CHAR_ASTERISK             = 0x2A; /* * */\nvar CHAR_COMMA                = 0x2C; /* , */\nvar CHAR_MINUS                = 0x2D; /* - */\nvar CHAR_COLON                = 0x3A; /* : */\nvar CHAR_GREATER_THAN         = 0x3E; /* > */\nvar CHAR_QUESTION             = 0x3F; /* ? */\nvar CHAR_COMMERCIAL_AT        = 0x40; /* @ */\nvar CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */\nvar CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */\nvar CHAR_GRAVE_ACCENT         = 0x60; /* ` */\nvar CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */\nvar CHAR_VERTICAL_LINE        = 0x7C; /* | */\nvar CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */\n\nvar ESCAPE_SEQUENCES = {};\n\nESCAPE_SEQUENCES[0x00]   = '\\\\0';\nESCAPE_SEQUENCES[0x07]   = '\\\\a';\nESCAPE_SEQUENCES[0x08]   = '\\\\b';\nESCAPE_SEQUENCES[0x09]   = '\\\\t';\nESCAPE_SEQUENCES[0x0A]   = '\\\\n';\nESCAPE_SEQUENCES[0x0B]   = '\\\\v';\nESCAPE_SEQUENCES[0x0C]   = '\\\\f';\nESCAPE_SEQUENCES[0x0D]   = '\\\\r';\nESCAPE_SEQUENCES[0x1B]   = '\\\\e';\nESCAPE_SEQUENCES[0x22]   = '\\\\\"';\nESCAPE_SEQUENCES[0x5C]   = '\\\\\\\\';\nESCAPE_SEQUENCES[0x85]   = '\\\\N';\nESCAPE_SEQUENCES[0xA0]   = '\\\\_';\nESCAPE_SEQUENCES[0x2028] = '\\\\L';\nESCAPE_SEQUENCES[0x2029] = '\\\\P';\n\nvar DEPRECATED_BOOLEANS_SYNTAX = [\n  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',\n  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'\n];\n\nfunction compileStyleMap(schema, map) {\n  var result, keys, index, length, tag, style, type;\n\n  if (null === map) {\n    return {};\n  }\n\n  result = {};\n  keys = Object.keys(map);\n\n  for (index = 0, length = keys.length; index < length; index += 1) {\n    tag = keys[index];\n    style = String(map[tag]);\n\n    if ('!!' === tag.slice(0, 2)) {\n      tag = 'tag:yaml.org,2002:' + tag.slice(2);\n    }\n\n    type = schema.compiledTypeMap[tag];\n\n    if (type && _hasOwnProperty.call(type.styleAliases, style)) {\n      style = type.styleAliases[style];\n    }\n\n    result[tag] = style;\n  }\n\n  return result;\n}\n\nfunction encodeHex(character) {\n  var string, handle, length;\n\n  string = character.toString(16).toUpperCase();\n\n  if (character <= 0xFF) {\n    handle = 'x';\n    length = 2;\n  } else if (character <= 0xFFFF) {\n    handle = 'u';\n    length = 4;\n  } else if (character <= 0xFFFFFFFF) {\n    handle = 'U';\n    length = 8;\n  } else {\n    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');\n  }\n\n  return '\\\\' + handle + common.repeat('0', length - string.length) + string;\n}\n\nfunction State(options) {\n  this.schema      = options['schema'] || DEFAULT_FULL_SCHEMA;\n  this.indent      = Math.max(1, (options['indent'] || 2));\n  this.skipInvalid = options['skipInvalid'] || false;\n  this.flowLevel   = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);\n  this.styleMap    = compileStyleMap(this.schema, options['styles'] || null);\n  this.sortKeys    = options['sortKeys'] || false;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.explicitTypes = this.schema.compiledExplicit;\n\n  this.tag = null;\n  this.result = '';\n\n  this.duplicates = [];\n  this.usedDuplicates = null;\n}\n\nfunction indentString(string, spaces) {\n  var ind = common.repeat(' ', spaces),\n      position = 0,\n      next = -1,\n      result = '',\n      line,\n      length = string.length;\n\n  while (position < length) {\n    next = string.indexOf('\\n', position);\n    if (next === -1) {\n      line = string.slice(position);\n      position = length;\n    } else {\n      line = string.slice(position, next + 1);\n      position = next + 1;\n    }\n    if (line.length && line !== '\\n') {\n      result += ind;\n    }\n    result += line;\n  }\n\n  return result;\n}\n\nfunction generateNextLine(state, level) {\n  return '\\n' + common.repeat(' ', state.indent * level);\n}\n\nfunction testImplicitResolving(state, str) {\n  var index, length, type;\n\n  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {\n    type = state.implicitTypes[index];\n\n    if (type.resolve(str)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction StringBuilder(source) {\n  this.source = source;\n  this.result = '';\n  this.checkpoint = 0;\n}\n\nStringBuilder.prototype.takeUpTo = function (position) {\n  var er;\n\n  if (position < this.checkpoint) {\n    er = new Error('position should be > checkpoint');\n    er.position = position;\n    er.checkpoint = this.checkpoint;\n    throw er;\n  }\n\n  this.result += this.source.slice(this.checkpoint, position);\n  this.checkpoint = position;\n  return this;\n};\n\nStringBuilder.prototype.escapeChar = function () {\n  var character, esc;\n\n  character = this.source.charCodeAt(this.checkpoint);\n  esc = ESCAPE_SEQUENCES[character] || encodeHex(character);\n  this.result += esc;\n  this.checkpoint += 1;\n\n  return this;\n};\n\nStringBuilder.prototype.finish = function () {\n  if (this.source.length > this.checkpoint) {\n    this.takeUpTo(this.source.length);\n  }\n};\n\nfunction writeScalar(state, object, level, iskey) {\n  var simple, first, spaceWrap, folded, literal, single, double,\n      sawLineFeed, linePosition, longestLine, indent, max, character,\n      position, escapeSeq, hexEsc, previous, lineLength, modifier,\n      trailingLineBreaks, result;\n\n  if (0 === object.length) {\n    state.dump = \"''\";\n    return;\n  }\n\n  if (-1 !== DEPRECATED_BOOLEANS_SYNTAX.indexOf(object)) {\n    state.dump = \"'\" + object + \"'\";\n    return;\n  }\n\n  simple = true;\n  first = object.length ? object.charCodeAt(0) : 0;\n  spaceWrap = (CHAR_SPACE === first ||\n               CHAR_SPACE === object.charCodeAt(object.length - 1));\n\n  // Simplified check for restricted first characters\n  // http://www.yaml.org/spec/1.2/spec.html#ns-plain-first%28c%29\n  if (CHAR_MINUS         === first ||\n      CHAR_QUESTION      === first ||\n      CHAR_COMMERCIAL_AT === first ||\n      CHAR_GRAVE_ACCENT  === first) {\n    simple = false;\n  }\n\n  // can only use > and | if not wrapped in spaces or is not a key.\n  if (spaceWrap) {\n    simple = false;\n    folded = false;\n    literal = false;\n  } else {\n    folded = !iskey;\n    literal = !iskey;\n  }\n\n  single = true;\n  double = new StringBuilder(object);\n\n  sawLineFeed = false;\n  linePosition = 0;\n  longestLine = 0;\n\n  indent = state.indent * level;\n  max = 80;\n  if (indent < 40) {\n    max -= indent;\n  } else {\n    max = 40;\n  }\n\n  for (position = 0; position < object.length; position++) {\n    character = object.charCodeAt(position);\n    if (simple) {\n      // Characters that can never appear in the simple scalar\n      if (!simpleChar(character)) {\n        simple = false;\n      } else {\n        // Still simple.  If we make it all the way through like\n        // this, then we can just dump the string as-is.\n        continue;\n      }\n    }\n\n    if (single && character === CHAR_SINGLE_QUOTE) {\n      single = false;\n    }\n\n    escapeSeq = ESCAPE_SEQUENCES[character];\n    hexEsc = needsHexEscape(character);\n\n    if (!escapeSeq && !hexEsc) {\n      continue;\n    }\n\n    if (character !== CHAR_LINE_FEED &&\n        character !== CHAR_DOUBLE_QUOTE &&\n        character !== CHAR_SINGLE_QUOTE) {\n      folded = false;\n      literal = false;\n    } else if (character === CHAR_LINE_FEED) {\n      sawLineFeed = true;\n      single = false;\n      if (position > 0) {\n        previous = object.charCodeAt(position - 1);\n        if (previous === CHAR_SPACE) {\n          literal = false;\n          folded = false;\n        }\n      }\n      if (folded) {\n        lineLength = position - linePosition;\n        linePosition = position;\n        if (lineLength > longestLine) {\n          longestLine = lineLength;\n        }\n      }\n    }\n\n    if (character !== CHAR_DOUBLE_QUOTE) {\n      single = false;\n    }\n\n    double.takeUpTo(position);\n    double.escapeChar();\n  }\n\n  if (simple && testImplicitResolving(state, object)) {\n    simple = false;\n  }\n\n  modifier = '';\n  if (folded || literal) {\n    trailingLineBreaks = 0;\n    if (object.charCodeAt(object.length - 1) === CHAR_LINE_FEED) {\n      trailingLineBreaks += 1;\n      if (object.charCodeAt(object.length - 2) === CHAR_LINE_FEED) {\n        trailingLineBreaks += 1;\n      }\n    }\n\n    if (trailingLineBreaks === 0) {\n      modifier = '-';\n    } else if (trailingLineBreaks === 2) {\n      modifier = '+';\n    }\n  }\n\n  if (literal && longestLine < max) {\n    folded = false;\n  }\n\n  // If it's literally one line, then don't bother with the literal.\n  // We may still want to do a fold, though, if it's a super long line.\n  if (!sawLineFeed) {\n    literal = false;\n  }\n\n  if (simple) {\n    state.dump = object;\n  } else if (single) {\n    state.dump = '\\'' + object + '\\'';\n  } else if (folded) {\n    result = fold(object, max);\n    state.dump = '>' + modifier + '\\n' + indentString(result, indent);\n  } else if (literal) {\n    if (!modifier) {\n      object = object.replace(/\\n$/, '');\n    }\n    state.dump = '|' + modifier + '\\n' + indentString(object, indent);\n  } else if (double) {\n    double.finish();\n    state.dump = '\"' + double.result + '\"';\n  } else {\n    throw new Error('Failed to dump scalar value');\n  }\n\n  return;\n}\n\n// The `trailing` var is a regexp match of any trailing `\\n` characters.\n//\n// There are three cases we care about:\n//\n// 1. One trailing `\\n` on the string.  Just use `|` or `>`.\n//    This is the assumed default. (trailing = null)\n// 2. No trailing `\\n` on the string.  Use `|-` or `>-` to \"chomp\" the end.\n// 3. More than one trailing `\\n` on the string.  Use `|+` or `>+`.\n//\n// In the case of `>+`, these line breaks are *not* doubled (like the line\n// breaks within the string), so it's important to only end with the exact\n// same number as we started.\nfunction fold(object, max) {\n  var result = '',\n      position = 0,\n      length = object.length,\n      trailing = /\\n+$/.exec(object),\n      newLine;\n\n  if (trailing) {\n    length = trailing.index + 1;\n  }\n\n  while (position < length) {\n    newLine = object.indexOf('\\n', position);\n    if (newLine > length || newLine === -1) {\n      if (result) {\n        result += '\\n\\n';\n      }\n      result += foldLine(object.slice(position, length), max);\n      position = length;\n    } else {\n      if (result) {\n        result += '\\n\\n';\n      }\n      result += foldLine(object.slice(position, newLine), max);\n      position = newLine + 1;\n    }\n  }\n  if (trailing && trailing[0] !== '\\n') {\n    result += trailing[0];\n  }\n\n  return result;\n}\n\nfunction foldLine(line, max) {\n  if (line === '') {\n    return line;\n  }\n\n  var foldRe = /[^\\s] [^\\s]/g,\n      result = '',\n      prevMatch = 0,\n      foldStart = 0,\n      match = foldRe.exec(line),\n      index,\n      foldEnd,\n      folded;\n\n  while (match) {\n    index = match.index;\n\n    // when we cross the max len, if the previous match would've\n    // been ok, use that one, and carry on.  If there was no previous\n    // match on this fold section, then just have a long line.\n    if (index - foldStart > max) {\n      if (prevMatch !== foldStart) {\n        foldEnd = prevMatch;\n      } else {\n        foldEnd = index;\n      }\n\n      if (result) {\n        result += '\\n';\n      }\n      folded = line.slice(foldStart, foldEnd);\n      result += folded;\n      foldStart = foldEnd + 1;\n    }\n    prevMatch = index + 1;\n    match = foldRe.exec(line);\n  }\n\n  if (result) {\n    result += '\\n';\n  }\n\n  // if we end up with one last word at the end, then the last bit might\n  // be slightly bigger than we wanted, because we exited out of the loop.\n  if (foldStart !== prevMatch && line.length - foldStart > max) {\n    result += line.slice(foldStart, prevMatch) + '\\n' +\n              line.slice(prevMatch + 1);\n  } else {\n    result += line.slice(foldStart);\n  }\n\n  return result;\n}\n\n// Returns true if character can be found in a simple scalar\nfunction simpleChar(character) {\n  return CHAR_TAB                  !== character &&\n         CHAR_LINE_FEED            !== character &&\n         CHAR_CARRIAGE_RETURN      !== character &&\n         CHAR_COMMA                !== character &&\n         CHAR_LEFT_SQUARE_BRACKET  !== character &&\n         CHAR_RIGHT_SQUARE_BRACKET !== character &&\n         CHAR_LEFT_CURLY_BRACKET   !== character &&\n         CHAR_RIGHT_CURLY_BRACKET  !== character &&\n         CHAR_SHARP                !== character &&\n         CHAR_AMPERSAND            !== character &&\n         CHAR_ASTERISK             !== character &&\n         CHAR_EXCLAMATION          !== character &&\n         CHAR_VERTICAL_LINE        !== character &&\n         CHAR_GREATER_THAN         !== character &&\n         CHAR_SINGLE_QUOTE         !== character &&\n         CHAR_DOUBLE_QUOTE         !== character &&\n         CHAR_PERCENT              !== character &&\n         CHAR_COLON                !== character &&\n         !ESCAPE_SEQUENCES[character]            &&\n         !needsHexEscape(character);\n}\n\n// Returns true if the character code needs to be escaped.\nfunction needsHexEscape(character) {\n  return !((0x00020 <= character && character <= 0x00007E) ||\n           (0x00085 === character)                         ||\n           (0x000A0 <= character && character <= 0x00D7FF) ||\n           (0x0E000 <= character && character <= 0x00FFFD) ||\n           (0x10000 <= character && character <= 0x10FFFF));\n}\n\nfunction writeFlowSequence(state, level, object) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level, object[index], false, false)) {\n      if (0 !== index) {\n        _result += ', ';\n      }\n      _result += state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = '[' + _result + ']';\n}\n\nfunction writeBlockSequence(state, level, object, compact) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level + 1, object[index], true, true)) {\n      if (!compact || 0 !== index) {\n        _result += generateNextLine(state, level);\n      }\n      _result += '- ' + state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '[]'; // Empty sequence if no valid values.\n}\n\nfunction writeFlowMapping(state, level, object) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      pairBuffer;\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (0 !== index) {\n      pairBuffer += ', ';\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level, objectKey, false, false)) {\n      continue; // Skip this pair because of invalid key;\n    }\n\n    if (state.dump.length > 1024) {\n      pairBuffer += '? ';\n    }\n\n    pairBuffer += state.dump + ': ';\n\n    if (!writeNode(state, level, objectValue, false, false)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = '{' + _result + '}';\n}\n\nfunction writeBlockMapping(state, level, object, compact) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      explicitPair,\n      pairBuffer;\n\n  // Allow sorting keys so that the output file is deterministic\n  if (state.sortKeys === true) {\n    // Default sorting\n    objectKeyList.sort();\n  } else if (typeof state.sortKeys === 'function') {\n    // Custom sort function\n    objectKeyList.sort(state.sortKeys);\n  } else if (state.sortKeys) {\n    // Something is wrong\n    throw new YAMLException('sortKeys must be a boolean or a function');\n  }\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (!compact || 0 !== index) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level + 1, objectKey, true, true, true)) {\n      continue; // Skip this pair because of invalid key.\n    }\n\n    explicitPair = (null !== state.tag && '?' !== state.tag) ||\n                   (state.dump && state.dump.length > 1024);\n\n    if (explicitPair) {\n      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n        pairBuffer += '?';\n      } else {\n        pairBuffer += '? ';\n      }\n    }\n\n    pairBuffer += state.dump;\n\n    if (explicitPair) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n      pairBuffer += ':';\n    } else {\n      pairBuffer += ': ';\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '{}'; // Empty mapping if no valid pairs.\n}\n\nfunction detectType(state, object, explicit) {\n  var _result, typeList, index, length, type, style;\n\n  typeList = explicit ? state.explicitTypes : state.implicitTypes;\n\n  for (index = 0, length = typeList.length; index < length; index += 1) {\n    type = typeList[index];\n\n    if ((type.instanceOf  || type.predicate) &&\n        (!type.instanceOf || (('object' === typeof object) && (object instanceof type.instanceOf))) &&\n        (!type.predicate  || type.predicate(object))) {\n\n      state.tag = explicit ? type.tag : '?';\n\n      if (type.represent) {\n        style = state.styleMap[type.tag] || type.defaultStyle;\n\n        if ('[object Function]' === _toString.call(type.represent)) {\n          _result = type.represent(object, style);\n        } else if (_hasOwnProperty.call(type.represent, style)) {\n          _result = type.represent[style](object, style);\n        } else {\n          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not \"' + style + '\" style');\n        }\n\n        state.dump = _result;\n      }\n\n      return true;\n    }\n  }\n\n  return false;\n}\n\n// Serializes `object` and writes it to global `result`.\n// Returns true on success, or false on invalid object.\n//\nfunction writeNode(state, level, object, block, compact, iskey) {\n  state.tag = null;\n  state.dump = object;\n\n  if (!detectType(state, object, false)) {\n    detectType(state, object, true);\n  }\n\n  var type = _toString.call(state.dump);\n\n  if (block) {\n    block = (0 > state.flowLevel || state.flowLevel > level);\n  }\n\n  var objectOrArray = '[object Object]' === type || '[object Array]' === type,\n      duplicateIndex,\n      duplicate;\n\n  if (objectOrArray) {\n    duplicateIndex = state.duplicates.indexOf(object);\n    duplicate = duplicateIndex !== -1;\n  }\n\n  if ((null !== state.tag && '?' !== state.tag) || duplicate || (2 !== state.indent && level > 0)) {\n    compact = false;\n  }\n\n  if (duplicate && state.usedDuplicates[duplicateIndex]) {\n    state.dump = '*ref_' + duplicateIndex;\n  } else {\n    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {\n      state.usedDuplicates[duplicateIndex] = true;\n    }\n    if ('[object Object]' === type) {\n      if (block && (0 !== Object.keys(state.dump).length)) {\n        writeBlockMapping(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowMapping(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if ('[object Array]' === type) {\n      if (block && (0 !== state.dump.length)) {\n        writeBlockSequence(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowSequence(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if ('[object String]' === type) {\n      if ('?' !== state.tag) {\n        writeScalar(state, state.dump, level, iskey);\n      }\n    } else {\n      if (state.skipInvalid) {\n        return false;\n      }\n      throw new YAMLException('unacceptable kind of an object to dump ' + type);\n    }\n\n    if (null !== state.tag && '?' !== state.tag) {\n      state.dump = '!<' + state.tag + '> ' + state.dump;\n    }\n  }\n\n  return true;\n}\n\nfunction getDuplicateReferences(object, state) {\n  var objects = [],\n      duplicatesIndexes = [],\n      index,\n      length;\n\n  inspectNode(object, objects, duplicatesIndexes);\n\n  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {\n    state.duplicates.push(objects[duplicatesIndexes[index]]);\n  }\n  state.usedDuplicates = new Array(length);\n}\n\nfunction inspectNode(object, objects, duplicatesIndexes) {\n  var objectKeyList,\n      index,\n      length;\n\n  if (null !== object && 'object' === typeof object) {\n    index = objects.indexOf(object);\n    if (-1 !== index) {\n      if (-1 === duplicatesIndexes.indexOf(index)) {\n        duplicatesIndexes.push(index);\n      }\n    } else {\n      objects.push(object);\n\n      if (Array.isArray(object)) {\n        for (index = 0, length = object.length; index < length; index += 1) {\n          inspectNode(object[index], objects, duplicatesIndexes);\n        }\n      } else {\n        objectKeyList = Object.keys(object);\n\n        for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);\n        }\n      }\n    }\n  }\n}\n\nfunction dump(input, options) {\n  options = options || {};\n\n  var state = new State(options);\n\n  getDuplicateReferences(input, state);\n\n  if (writeNode(state, 0, input, true, true)) {\n    return state.dump + '\\n';\n  }\n  return '';\n}\n\nfunction safeDump(input, options) {\n  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\nmodule.exports.dump     = dump;\nmodule.exports.safeDump = safeDump;\n",
-    "// YAML error class. http://stackoverflow.com/questions/8458984\n//\n'use strict';\n\n\nvar inherits = require('util').inherits;\n\n\nfunction YAMLException(reason, mark) {\n  // Super constructor\n  Error.call(this);\n\n  // Include stack trace in error object\n  if (Error.captureStackTrace) {\n    // Chrome and NodeJS\n    Error.captureStackTrace(this, this.constructor);\n  } else {\n    // FF, IE 10+ and Safari 6+. Fallback for others\n    this.stack = (new Error()).stack || '';\n  }\n\n  this.name = 'YAMLException';\n  this.reason = reason;\n  this.mark = mark;\n  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');\n}\n\n\n// Inherit from Error\ninherits(YAMLException, Error);\n\n\nYAMLException.prototype.toString = function toString(compact) {\n  var result = this.name + ': ';\n\n  result += this.reason || '(unknown reason)';\n\n  if (!compact && this.mark) {\n    result += ' ' + this.mark.toString();\n  }\n\n  return result;\n};\n\n\nmodule.exports = YAMLException;\n",
-    "'use strict';\n\n/*eslint-disable max-len,no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar Mark                = require('./mark');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\n\n\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\n\nvar CONTEXT_FLOW_IN   = 1;\nvar CONTEXT_FLOW_OUT  = 2;\nvar CONTEXT_BLOCK_IN  = 3;\nvar CONTEXT_BLOCK_OUT = 4;\n\n\nvar CHOMPING_CLIP  = 1;\nvar CHOMPING_STRIP = 2;\nvar CHOMPING_KEEP  = 3;\n\n\nvar PATTERN_NON_PRINTABLE         = /[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F\\x7F-\\x84\\x86-\\x9F\\uFFFE\\uFFFF]|[\\uD800-\\uDBFF](?![\\uDC00-\\uDFFF])|(?:[^\\uD800-\\uDBFF]|^)[\\uDC00-\\uDFFF]/;\nvar PATTERN_NON_ASCII_LINE_BREAKS = /[\\x85\\u2028\\u2029]/;\nvar PATTERN_FLOW_INDICATORS       = /[,\\[\\]\\{\\}]/;\nvar PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\\-]+!)$/i;\nvar PATTERN_TAG_URI               = /^(?:!|[^,\\[\\]\\{\\}])(?:%[0-9a-f]{2}|[0-9a-z\\-#;\\/\\?:@&=\\+\\$,_\\.!~\\*'\\(\\)\\[\\]])*$/i;\n\n\nfunction is_EOL(c) {\n  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);\n}\n\nfunction is_WHITE_SPACE(c) {\n  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);\n}\n\nfunction is_WS_OR_EOL(c) {\n  return (c === 0x09/* Tab */) ||\n         (c === 0x20/* Space */) ||\n         (c === 0x0A/* LF */) ||\n         (c === 0x0D/* CR */);\n}\n\nfunction is_FLOW_INDICATOR(c) {\n  return 0x2C/* , */ === c ||\n         0x5B/* [ */ === c ||\n         0x5D/* ] */ === c ||\n         0x7B/* { */ === c ||\n         0x7D/* } */ === c;\n}\n\nfunction fromHexCode(c) {\n  var lc;\n\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  /*eslint-disable no-bitwise*/\n  lc = c | 0x20;\n\n  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {\n    return lc - 0x61 + 10;\n  }\n\n  return -1;\n}\n\nfunction escapedHexLen(c) {\n  if (c === 0x78/* x */) { return 2; }\n  if (c === 0x75/* u */) { return 4; }\n  if (c === 0x55/* U */) { return 8; }\n  return 0;\n}\n\nfunction fromDecimalCode(c) {\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  return -1;\n}\n\nfunction simpleEscapeSequence(c) {\n  return (c === 0x30/* 0 */) ? '\\x00' :\n        (c === 0x61/* a */) ? '\\x07' :\n        (c === 0x62/* b */) ? '\\x08' :\n        (c === 0x74/* t */) ? '\\x09' :\n        (c === 0x09/* Tab */) ? '\\x09' :\n        (c === 0x6E/* n */) ? '\\x0A' :\n        (c === 0x76/* v */) ? '\\x0B' :\n        (c === 0x66/* f */) ? '\\x0C' :\n        (c === 0x72/* r */) ? '\\x0D' :\n        (c === 0x65/* e */) ? '\\x1B' :\n        (c === 0x20/* Space */) ? ' ' :\n        (c === 0x22/* \" */) ? '\\x22' :\n        (c === 0x2F/* / */) ? '/' :\n        (c === 0x5C/* \\ */) ? '\\x5C' :\n        (c === 0x4E/* N */) ? '\\x85' :\n        (c === 0x5F/* _ */) ? '\\xA0' :\n        (c === 0x4C/* L */) ? '\\u2028' :\n        (c === 0x50/* P */) ? '\\u2029' : '';\n}\n\nfunction charFromCodepoint(c) {\n  if (c <= 0xFFFF) {\n    return String.fromCharCode(c);\n  }\n  // Encode UTF-16 surrogate pair\n  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF\n  return String.fromCharCode(((c - 0x010000) >> 10) + 0xD800,\n                             ((c - 0x010000) & 0x03FF) + 0xDC00);\n}\n\nvar simpleEscapeCheck = new Array(256); // integer, for fast access\nvar simpleEscapeMap = new Array(256);\nfor (var i = 0; i < 256; i++) {\n  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;\n  simpleEscapeMap[i] = simpleEscapeSequence(i);\n}\n\n\nfunction State(input, options) {\n  this.input = input;\n\n  this.filename  = options['filename']  || null;\n  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;\n  this.onWarning = options['onWarning'] || null;\n  this.legacy    = options['legacy']    || false;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.typeMap       = this.schema.compiledTypeMap;\n\n  this.length     = input.length;\n  this.position   = 0;\n  this.line       = 0;\n  this.lineStart  = 0;\n  this.lineIndent = 0;\n\n  this.documents = [];\n\n  /*\n  this.version;\n  this.checkLineBreaks;\n  this.tagMap;\n  this.anchorMap;\n  this.tag;\n  this.anchor;\n  this.kind;\n  this.result;*/\n\n}\n\n\nfunction generateError(state, message) {\n  return new YAMLException(\n    message,\n    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));\n}\n\nfunction throwError(state, message) {\n  throw generateError(state, message);\n}\n\nfunction throwWarning(state, message) {\n  if (state.onWarning) {\n    state.onWarning.call(null, generateError(state, message));\n  }\n}\n\n\nvar directiveHandlers = {\n\n  YAML: function handleYamlDirective(state, name, args) {\n\n      var match, major, minor;\n\n      if (null !== state.version) {\n        throwError(state, 'duplication of %YAML directive');\n      }\n\n      if (1 !== args.length) {\n        throwError(state, 'YAML directive accepts exactly one argument');\n      }\n\n      match = /^([0-9]+)\\.([0-9]+)$/.exec(args[0]);\n\n      if (null === match) {\n        throwError(state, 'ill-formed argument of the YAML directive');\n      }\n\n      major = parseInt(match[1], 10);\n      minor = parseInt(match[2], 10);\n\n      if (1 !== major) {\n        throwError(state, 'unacceptable YAML version of the document');\n      }\n\n      state.version = args[0];\n      state.checkLineBreaks = (minor < 2);\n\n      if (1 !== minor && 2 !== minor) {\n        throwWarning(state, 'unsupported YAML version of the document');\n      }\n    },\n\n  TAG: function handleTagDirective(state, name, args) {\n\n      var handle, prefix;\n\n      if (2 !== args.length) {\n        throwError(state, 'TAG directive accepts exactly two arguments');\n      }\n\n      handle = args[0];\n      prefix = args[1];\n\n      if (!PATTERN_TAG_HANDLE.test(handle)) {\n        throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');\n      }\n\n      if (_hasOwnProperty.call(state.tagMap, handle)) {\n        throwError(state, 'there is a previously declared suffix for \"' + handle + '\" tag handle');\n      }\n\n      if (!PATTERN_TAG_URI.test(prefix)) {\n        throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');\n      }\n\n      state.tagMap[handle] = prefix;\n    }\n};\n\n\nfunction captureSegment(state, start, end, checkJson) {\n  var _position, _length, _character, _result;\n\n  if (start < end) {\n    _result = state.input.slice(start, end);\n\n    if (checkJson) {\n      for (_position = 0, _length = _result.length;\n           _position < _length;\n           _position += 1) {\n        _character = _result.charCodeAt(_position);\n        if (!(0x09 === _character ||\n              0x20 <= _character && _character <= 0x10FFFF)) {\n          throwError(state, 'expected valid JSON character');\n        }\n      }\n    }\n\n    state.result += _result;\n  }\n}\n\nfunction mergeMappings(state, destination, source) {\n  var sourceKeys, key, index, quantity;\n\n  if (!common.isObject(source)) {\n    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');\n  }\n\n  sourceKeys = Object.keys(source);\n\n  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {\n    key = sourceKeys[index];\n\n    if (!_hasOwnProperty.call(destination, key)) {\n      destination[key] = source[key];\n    }\n  }\n}\n\nfunction storeMappingPair(state, _result, keyTag, keyNode, valueNode) {\n  var index, quantity;\n\n  keyNode = String(keyNode);\n\n  if (null === _result) {\n    _result = {};\n  }\n\n  if ('tag:yaml.org,2002:merge' === keyTag) {\n    if (Array.isArray(valueNode)) {\n      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {\n        mergeMappings(state, _result, valueNode[index]);\n      }\n    } else {\n      mergeMappings(state, _result, valueNode);\n    }\n  } else {\n    _result[keyNode] = valueNode;\n  }\n\n  return _result;\n}\n\nfunction readLineBreak(state) {\n  var ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x0A/* LF */ === ch) {\n    state.position++;\n  } else if (0x0D/* CR */ === ch) {\n    state.position++;\n    if (0x0A/* LF */ === state.input.charCodeAt(state.position)) {\n      state.position++;\n    }\n  } else {\n    throwError(state, 'a line break is expected');\n  }\n\n  state.line += 1;\n  state.lineStart = state.position;\n}\n\nfunction skipSeparationSpace(state, allowComments, checkIndent) {\n  var lineBreaks = 0,\n      ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n    while (is_WHITE_SPACE(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (allowComments && 0x23/* # */ === ch) {\n      do {\n        ch = state.input.charCodeAt(++state.position);\n      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && 0 !== ch);\n    }\n\n    if (is_EOL(ch)) {\n      readLineBreak(state);\n\n      ch = state.input.charCodeAt(state.position);\n      lineBreaks++;\n      state.lineIndent = 0;\n\n      while (0x20/* Space */ === ch) {\n        state.lineIndent++;\n        ch = state.input.charCodeAt(++state.position);\n      }\n    } else {\n      break;\n    }\n  }\n\n  if (-1 !== checkIndent && 0 !== lineBreaks && state.lineIndent < checkIndent) {\n    throwWarning(state, 'deficient indentation');\n  }\n\n  return lineBreaks;\n}\n\nfunction testDocumentSeparator(state) {\n  var _position = state.position,\n      ch;\n\n  ch = state.input.charCodeAt(_position);\n\n  // Condition state.position === state.lineStart is tested\n  // in parent on each call, for efficiency. No needs to test here again.\n  if ((0x2D/* - */ === ch || 0x2E/* . */ === ch) &&\n      state.input.charCodeAt(_position + 1) === ch &&\n      state.input.charCodeAt(_position + 2) === ch) {\n\n    _position += 3;\n\n    ch = state.input.charCodeAt(_position);\n\n    if (ch === 0 || is_WS_OR_EOL(ch)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction writeFoldedLines(state, count) {\n  if (1 === count) {\n    state.result += ' ';\n  } else if (count > 1) {\n    state.result += common.repeat('\\n', count - 1);\n  }\n}\n\n\nfunction readPlainScalar(state, nodeIndent, withinFlowCollection) {\n  var preceding,\n      following,\n      captureStart,\n      captureEnd,\n      hasPendingContent,\n      _line,\n      _lineStart,\n      _lineIndent,\n      _kind = state.kind,\n      _result = state.result,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (is_WS_OR_EOL(ch)             ||\n      is_FLOW_INDICATOR(ch)        ||\n      0x23/* # */           === ch ||\n      0x26/* & */           === ch ||\n      0x2A/* * */           === ch ||\n      0x21/* ! */           === ch ||\n      0x7C/* | */           === ch ||\n      0x3E/* > */           === ch ||\n      0x27/* ' */           === ch ||\n      0x22/* \" */           === ch ||\n      0x25/* % */           === ch ||\n      0x40/* @ */           === ch ||\n      0x60/* ` */           === ch) {\n    return false;\n  }\n\n  if (0x3F/* ? */ === ch || 0x2D/* - */ === ch) {\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (is_WS_OR_EOL(following) ||\n        withinFlowCollection && is_FLOW_INDICATOR(following)) {\n      return false;\n    }\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  captureStart = captureEnd = state.position;\n  hasPendingContent = false;\n\n  while (0 !== ch) {\n    if (0x3A/* : */ === ch) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following) ||\n          withinFlowCollection && is_FLOW_INDICATOR(following)) {\n        break;\n      }\n\n    } else if (0x23/* # */ === ch) {\n      preceding = state.input.charCodeAt(state.position - 1);\n\n      if (is_WS_OR_EOL(preceding)) {\n        break;\n      }\n\n    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||\n               withinFlowCollection && is_FLOW_INDICATOR(ch)) {\n      break;\n\n    } else if (is_EOL(ch)) {\n      _line = state.line;\n      _lineStart = state.lineStart;\n      _lineIndent = state.lineIndent;\n      skipSeparationSpace(state, false, -1);\n\n      if (state.lineIndent >= nodeIndent) {\n        hasPendingContent = true;\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      } else {\n        state.position = captureEnd;\n        state.line = _line;\n        state.lineStart = _lineStart;\n        state.lineIndent = _lineIndent;\n        break;\n      }\n    }\n\n    if (hasPendingContent) {\n      captureSegment(state, captureStart, captureEnd, false);\n      writeFoldedLines(state, state.line - _line);\n      captureStart = captureEnd = state.position;\n      hasPendingContent = false;\n    }\n\n    if (!is_WHITE_SPACE(ch)) {\n      captureEnd = state.position + 1;\n    }\n\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  captureSegment(state, captureStart, captureEnd, false);\n\n  if (state.result) {\n    return true;\n  }\n\n  state.kind = _kind;\n  state.result = _result;\n  return false;\n}\n\nfunction readSingleQuotedScalar(state, nodeIndent) {\n  var ch,\n      captureStart, captureEnd;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x27/* ' */ !== ch) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    if (0x27/* ' */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (0x27/* ' */ === ch) {\n        captureStart = captureEnd = state.position;\n        state.position++;\n      } else {\n        return true;\n      }\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a single quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a single quoted scalar');\n}\n\nfunction readDoubleQuotedScalar(state, nodeIndent) {\n  var captureStart,\n      captureEnd,\n      hexLength,\n      hexResult,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x22/* \" */ !== ch) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    if (0x22/* \" */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      state.position++;\n      return true;\n\n    } else if (0x5C/* \\ */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (is_EOL(ch)) {\n        skipSeparationSpace(state, false, nodeIndent);\n\n        // TODO: rework to inline fn with no type cast?\n      } else if (ch < 256 && simpleEscapeCheck[ch]) {\n        state.result += simpleEscapeMap[ch];\n        state.position++;\n\n      } else if ((tmp = escapedHexLen(ch)) > 0) {\n        hexLength = tmp;\n        hexResult = 0;\n\n        for (; hexLength > 0; hexLength--) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if ((tmp = fromHexCode(ch)) >= 0) {\n            hexResult = (hexResult << 4) + tmp;\n\n          } else {\n            throwError(state, 'expected hexadecimal character');\n          }\n        }\n\n        state.result += charFromCodepoint(hexResult);\n\n        state.position++;\n\n      } else {\n        throwError(state, 'unknown escape sequence');\n      }\n\n      captureStart = captureEnd = state.position;\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a double quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a double quoted scalar');\n}\n\nfunction readFlowCollection(state, nodeIndent) {\n  var readNext = true,\n      _line,\n      _tag     = state.tag,\n      _result,\n      _anchor  = state.anchor,\n      following,\n      terminator,\n      isPair,\n      isExplicitPair,\n      isMapping,\n      keyNode,\n      keyTag,\n      valueNode,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x5B/* [ */) {\n    terminator = 0x5D;/* ] */\n    isMapping = false;\n    _result = [];\n  } else if (ch === 0x7B/* { */) {\n    terminator = 0x7D;/* } */\n    isMapping = true;\n    _result = {};\n  } else {\n    return false;\n  }\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  while (0 !== ch) {\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (ch === terminator) {\n      state.position++;\n      state.tag = _tag;\n      state.anchor = _anchor;\n      state.kind = isMapping ? 'mapping' : 'sequence';\n      state.result = _result;\n      return true;\n    } else if (!readNext) {\n      throwError(state, 'missed comma between flow collection entries');\n    }\n\n    keyTag = keyNode = valueNode = null;\n    isPair = isExplicitPair = false;\n\n    if (0x3F/* ? */ === ch) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following)) {\n        isPair = isExplicitPair = true;\n        state.position++;\n        skipSeparationSpace(state, true, nodeIndent);\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n    keyTag = state.tag;\n    keyNode = state.result;\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((isExplicitPair || state.line === _line) && 0x3A/* : */ === ch) {\n      isPair = true;\n      ch = state.input.charCodeAt(++state.position);\n      skipSeparationSpace(state, true, nodeIndent);\n      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n      valueNode = state.result;\n    }\n\n    if (isMapping) {\n      storeMappingPair(state, _result, keyTag, keyNode, valueNode);\n    } else if (isPair) {\n      _result.push(storeMappingPair(state, null, keyTag, keyNode, valueNode));\n    } else {\n      _result.push(keyNode);\n    }\n\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (0x2C/* , */ === ch) {\n      readNext = true;\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      readNext = false;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a flow collection');\n}\n\nfunction readBlockScalar(state, nodeIndent) {\n  var captureStart,\n      folding,\n      chomping       = CHOMPING_CLIP,\n      detectedIndent = false,\n      textIndent     = nodeIndent,\n      emptyLines     = 0,\n      atMoreIndented = false,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x7C/* | */) {\n    folding = false;\n  } else if (ch === 0x3E/* > */) {\n    folding = true;\n  } else {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n\n  while (0 !== ch) {\n    ch = state.input.charCodeAt(++state.position);\n\n    if (0x2B/* + */ === ch || 0x2D/* - */ === ch) {\n      if (CHOMPING_CLIP === chomping) {\n        chomping = (0x2B/* + */ === ch) ? CHOMPING_KEEP : CHOMPING_STRIP;\n      } else {\n        throwError(state, 'repeat of a chomping mode identifier');\n      }\n\n    } else if ((tmp = fromDecimalCode(ch)) >= 0) {\n      if (tmp === 0) {\n        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');\n      } else if (!detectedIndent) {\n        textIndent = nodeIndent + tmp - 1;\n        detectedIndent = true;\n      } else {\n        throwError(state, 'repeat of an indentation width identifier');\n      }\n\n    } else {\n      break;\n    }\n  }\n\n  if (is_WHITE_SPACE(ch)) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (is_WHITE_SPACE(ch));\n\n    if (0x23/* # */ === ch) {\n      do { ch = state.input.charCodeAt(++state.position); }\n      while (!is_EOL(ch) && (0 !== ch));\n    }\n  }\n\n  while (0 !== ch) {\n    readLineBreak(state);\n    state.lineIndent = 0;\n\n    ch = state.input.charCodeAt(state.position);\n\n    while ((!detectedIndent || state.lineIndent < textIndent) &&\n           (0x20/* Space */ === ch)) {\n      state.lineIndent++;\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (!detectedIndent && state.lineIndent > textIndent) {\n      textIndent = state.lineIndent;\n    }\n\n    if (is_EOL(ch)) {\n      emptyLines++;\n      continue;\n    }\n\n    // End of the scalar.\n    if (state.lineIndent < textIndent) {\n\n      // Perform the chomping.\n      if (chomping === CHOMPING_KEEP) {\n        state.result += common.repeat('\\n', emptyLines);\n      } else if (chomping === CHOMPING_CLIP) {\n        if (detectedIndent) { // i.e. only if the scalar is not empty.\n          state.result += '\\n';\n        }\n      }\n\n      // Break this `while` cycle and go to the funciton's epilogue.\n      break;\n    }\n\n    // Folded style: use fancy rules to handle line breaks.\n    if (folding) {\n\n      // Lines starting with white space characters (more-indented lines) are not folded.\n      if (is_WHITE_SPACE(ch)) {\n        atMoreIndented = true;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // End of more-indented block.\n      } else if (atMoreIndented) {\n        atMoreIndented = false;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // Just one line break - perceive as the same line.\n      } else if (0 === emptyLines) {\n        if (detectedIndent) { // i.e. only if we have already read some scalar content.\n          state.result += ' ';\n        }\n\n      // Several line breaks - perceive as different lines.\n      } else {\n        state.result += common.repeat('\\n', emptyLines);\n      }\n\n    // Literal style: just add exact number of line breaks between content lines.\n    } else if (detectedIndent) {\n      // If current line isn't the first one - count line break from the last content line.\n      state.result += common.repeat('\\n', emptyLines + 1);\n    } else {\n      // In case of the first content line - count only empty lines.\n      state.result += common.repeat('\\n', emptyLines);\n    }\n\n    detectedIndent = true;\n    emptyLines = 0;\n    captureStart = state.position;\n\n    while (!is_EOL(ch) && (0 !== ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    captureSegment(state, captureStart, state.position, false);\n  }\n\n  return true;\n}\n\nfunction readBlockSequence(state, nodeIndent) {\n  var _line,\n      _tag      = state.tag,\n      _anchor   = state.anchor,\n      _result   = [],\n      following,\n      detected  = false,\n      ch;\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n\n    if (0x2D/* - */ !== ch) {\n      break;\n    }\n\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (!is_WS_OR_EOL(following)) {\n      break;\n    }\n\n    detected = true;\n    state.position++;\n\n    if (skipSeparationSpace(state, true, -1)) {\n      if (state.lineIndent <= nodeIndent) {\n        _result.push(null);\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);\n    _result.push(state.result);\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((state.line === _line || state.lineIndent > nodeIndent) && (0 !== ch)) {\n      throwError(state, 'bad indentation of a sequence entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'sequence';\n    state.result = _result;\n    return true;\n  }\n  return false;\n}\n\nfunction readBlockMapping(state, nodeIndent, flowIndent) {\n  var following,\n      allowCompact,\n      _line,\n      _tag          = state.tag,\n      _anchor       = state.anchor,\n      _result       = {},\n      keyTag        = null,\n      keyNode       = null,\n      valueNode     = null,\n      atExplicitKey = false,\n      detected      = false,\n      ch;\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n    following = state.input.charCodeAt(state.position + 1);\n    _line = state.line; // Save the current line.\n\n    //\n    // Explicit notation case. There are two separate blocks:\n    // first for the key (denoted by \"?\") and second for the value (denoted by \":\")\n    //\n    if ((0x3F/* ? */ === ch || 0x3A/* : */  === ch) && is_WS_OR_EOL(following)) {\n\n      if (0x3F/* ? */ === ch) {\n        if (atExplicitKey) {\n          storeMappingPair(state, _result, keyTag, keyNode, null);\n          keyTag = keyNode = valueNode = null;\n        }\n\n        detected = true;\n        atExplicitKey = true;\n        allowCompact = true;\n\n      } else if (atExplicitKey) {\n        // i.e. 0x3A/* : */ === character after the explicit key.\n        atExplicitKey = false;\n        allowCompact = true;\n\n      } else {\n        throwError(state, 'incomplete explicit mapping pair; a key node is missed');\n      }\n\n      state.position += 1;\n      ch = following;\n\n    //\n    // Implicit notation case. Flow-style node as the key first, then \":\", and the value.\n    //\n    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {\n\n      if (state.line === _line) {\n        ch = state.input.charCodeAt(state.position);\n\n        while (is_WHITE_SPACE(ch)) {\n          ch = state.input.charCodeAt(++state.position);\n        }\n\n        if (0x3A/* : */ === ch) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if (!is_WS_OR_EOL(ch)) {\n            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');\n          }\n\n          if (atExplicitKey) {\n            storeMappingPair(state, _result, keyTag, keyNode, null);\n            keyTag = keyNode = valueNode = null;\n          }\n\n          detected = true;\n          atExplicitKey = false;\n          allowCompact = false;\n          keyTag = state.tag;\n          keyNode = state.result;\n\n        } else if (detected) {\n          throwError(state, 'can not read an implicit mapping pair; a colon is missed');\n\n        } else {\n          state.tag = _tag;\n          state.anchor = _anchor;\n          return true; // Keep the result of `composeNode`.\n        }\n\n      } else if (detected) {\n        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');\n\n      } else {\n        state.tag = _tag;\n        state.anchor = _anchor;\n        return true; // Keep the result of `composeNode`.\n      }\n\n    } else {\n      break; // Reading is done. Go to the epilogue.\n    }\n\n    //\n    // Common reading code for both explicit and implicit notations.\n    //\n    if (state.line === _line || state.lineIndent > nodeIndent) {\n      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {\n        if (atExplicitKey) {\n          keyNode = state.result;\n        } else {\n          valueNode = state.result;\n        }\n      }\n\n      if (!atExplicitKey) {\n        storeMappingPair(state, _result, keyTag, keyNode, valueNode);\n        keyTag = keyNode = valueNode = null;\n      }\n\n      skipSeparationSpace(state, true, -1);\n      ch = state.input.charCodeAt(state.position);\n    }\n\n    if (state.lineIndent > nodeIndent && (0 !== ch)) {\n      throwError(state, 'bad indentation of a mapping entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  //\n  // Epilogue.\n  //\n\n  // Special case: last mapping's node contains only the key in explicit notation.\n  if (atExplicitKey) {\n    storeMappingPair(state, _result, keyTag, keyNode, null);\n  }\n\n  // Expose the resulting mapping.\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'mapping';\n    state.result = _result;\n  }\n\n  return detected;\n}\n\nfunction readTagProperty(state) {\n  var _position,\n      isVerbatim = false,\n      isNamed    = false,\n      tagHandle,\n      tagName,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x21/* ! */ !== ch) {\n    return false;\n  }\n\n  if (null !== state.tag) {\n    throwError(state, 'duplication of a tag property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  if (0x3C/* < */ === ch) {\n    isVerbatim = true;\n    ch = state.input.charCodeAt(++state.position);\n\n  } else if (0x21/* ! */ === ch) {\n    isNamed = true;\n    tagHandle = '!!';\n    ch = state.input.charCodeAt(++state.position);\n\n  } else {\n    tagHandle = '!';\n  }\n\n  _position = state.position;\n\n  if (isVerbatim) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (0 !== ch && 0x3E/* > */ !== ch);\n\n    if (state.position < state.length) {\n      tagName = state.input.slice(_position, state.position);\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      throwError(state, 'unexpected end of the stream within a verbatim tag');\n    }\n  } else {\n    while (0 !== ch && !is_WS_OR_EOL(ch)) {\n\n      if (0x21/* ! */ === ch) {\n        if (!isNamed) {\n          tagHandle = state.input.slice(_position - 1, state.position + 1);\n\n          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {\n            throwError(state, 'named tag handle cannot contain such characters');\n          }\n\n          isNamed = true;\n          _position = state.position + 1;\n        } else {\n          throwError(state, 'tag suffix cannot contain exclamation marks');\n        }\n      }\n\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    tagName = state.input.slice(_position, state.position);\n\n    if (PATTERN_FLOW_INDICATORS.test(tagName)) {\n      throwError(state, 'tag suffix cannot contain flow indicator characters');\n    }\n  }\n\n  if (tagName && !PATTERN_TAG_URI.test(tagName)) {\n    throwError(state, 'tag name cannot contain such characters: ' + tagName);\n  }\n\n  if (isVerbatim) {\n    state.tag = tagName;\n\n  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {\n    state.tag = state.tagMap[tagHandle] + tagName;\n\n  } else if ('!' === tagHandle) {\n    state.tag = '!' + tagName;\n\n  } else if ('!!' === tagHandle) {\n    state.tag = 'tag:yaml.org,2002:' + tagName;\n\n  } else {\n    throwError(state, 'undeclared tag handle \"' + tagHandle + '\"');\n  }\n\n  return true;\n}\n\nfunction readAnchorProperty(state) {\n  var _position,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x26/* & */ !== ch) {\n    return false;\n  }\n\n  if (null !== state.anchor) {\n    throwError(state, 'duplication of an anchor property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (0 !== ch && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an anchor node must contain at least one character');\n  }\n\n  state.anchor = state.input.slice(_position, state.position);\n  return true;\n}\n\nfunction readAlias(state) {\n  var _position, alias,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x2A/* * */ !== ch) {\n    return false;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (0 !== ch && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an alias node must contain at least one character');\n  }\n\n  alias = state.input.slice(_position, state.position);\n\n  if (!state.anchorMap.hasOwnProperty(alias)) {\n    throwError(state, 'unidentified alias \"' + alias + '\"');\n  }\n\n  state.result = state.anchorMap[alias];\n  skipSeparationSpace(state, true, -1);\n  return true;\n}\n\nfunction composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {\n  var allowBlockStyles,\n      allowBlockScalars,\n      allowBlockCollections,\n      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent\n      atNewLine  = false,\n      hasContent = false,\n      typeIndex,\n      typeQuantity,\n      type,\n      flowIndent,\n      blockIndent;\n\n  state.tag    = null;\n  state.anchor = null;\n  state.kind   = null;\n  state.result = null;\n\n  allowBlockStyles = allowBlockScalars = allowBlockCollections =\n    CONTEXT_BLOCK_OUT === nodeContext ||\n    CONTEXT_BLOCK_IN  === nodeContext;\n\n  if (allowToSeek) {\n    if (skipSeparationSpace(state, true, -1)) {\n      atNewLine = true;\n\n      if (state.lineIndent > parentIndent) {\n        indentStatus = 1;\n      } else if (state.lineIndent === parentIndent) {\n        indentStatus = 0;\n      } else if (state.lineIndent < parentIndent) {\n        indentStatus = -1;\n      }\n    }\n  }\n\n  if (1 === indentStatus) {\n    while (readTagProperty(state) || readAnchorProperty(state)) {\n      if (skipSeparationSpace(state, true, -1)) {\n        atNewLine = true;\n        allowBlockCollections = allowBlockStyles;\n\n        if (state.lineIndent > parentIndent) {\n          indentStatus = 1;\n        } else if (state.lineIndent === parentIndent) {\n          indentStatus = 0;\n        } else if (state.lineIndent < parentIndent) {\n          indentStatus = -1;\n        }\n      } else {\n        allowBlockCollections = false;\n      }\n    }\n  }\n\n  if (allowBlockCollections) {\n    allowBlockCollections = atNewLine || allowCompact;\n  }\n\n  if (1 === indentStatus || CONTEXT_BLOCK_OUT === nodeContext) {\n    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {\n      flowIndent = parentIndent;\n    } else {\n      flowIndent = parentIndent + 1;\n    }\n\n    blockIndent = state.position - state.lineStart;\n\n    if (1 === indentStatus) {\n      if (allowBlockCollections &&\n          (readBlockSequence(state, blockIndent) ||\n           readBlockMapping(state, blockIndent, flowIndent)) ||\n          readFlowCollection(state, flowIndent)) {\n        hasContent = true;\n      } else {\n        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||\n            readSingleQuotedScalar(state, flowIndent) ||\n            readDoubleQuotedScalar(state, flowIndent)) {\n          hasContent = true;\n\n        } else if (readAlias(state)) {\n          hasContent = true;\n\n          if (null !== state.tag || null !== state.anchor) {\n            throwError(state, 'alias node should not have any properties');\n          }\n\n        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {\n          hasContent = true;\n\n          if (null === state.tag) {\n            state.tag = '?';\n          }\n        }\n\n        if (null !== state.anchor) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else if (0 === indentStatus) {\n      // Special case: block sequences are allowed to have same indentation level as the parent.\n      // http://www.yaml.org/spec/1.2/spec.html#id2799784\n      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);\n    }\n  }\n\n  if (null !== state.tag && '!' !== state.tag) {\n    if ('?' === state.tag) {\n      for (typeIndex = 0, typeQuantity = state.implicitTypes.length;\n           typeIndex < typeQuantity;\n           typeIndex += 1) {\n        type = state.implicitTypes[typeIndex];\n\n        // Implicit resolving is not allowed for non-scalar types, and '?'\n        // non-specific tag is only assigned to plain scalars. So, it isn't\n        // needed to check for 'kind' conformity.\n\n        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched\n          state.result = type.construct(state.result);\n          state.tag = type.tag;\n          if (null !== state.anchor) {\n            state.anchorMap[state.anchor] = state.result;\n          }\n          break;\n        }\n      }\n    } else if (_hasOwnProperty.call(state.typeMap, state.tag)) {\n      type = state.typeMap[state.tag];\n\n      if (null !== state.result && type.kind !== state.kind) {\n        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be \"' + type.kind + '\", not \"' + state.kind + '\"');\n      }\n\n      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched\n        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');\n      } else {\n        state.result = type.construct(state.result);\n        if (null !== state.anchor) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else {\n      throwError(state, 'unknown tag !<' + state.tag + '>');\n    }\n  }\n\n  return null !== state.tag || null !== state.anchor || hasContent;\n}\n\nfunction readDocument(state) {\n  var documentStart = state.position,\n      _position,\n      directiveName,\n      directiveArgs,\n      hasDirectives = false,\n      ch;\n\n  state.version = null;\n  state.checkLineBreaks = state.legacy;\n  state.tagMap = {};\n  state.anchorMap = {};\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (state.lineIndent > 0 || 0x25/* % */ !== ch) {\n      break;\n    }\n\n    hasDirectives = true;\n    ch = state.input.charCodeAt(++state.position);\n    _position = state.position;\n\n    while (0 !== ch && !is_WS_OR_EOL(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    directiveName = state.input.slice(_position, state.position);\n    directiveArgs = [];\n\n    if (directiveName.length < 1) {\n      throwError(state, 'directive name must not be less than one character in length');\n    }\n\n    while (0 !== ch) {\n      while (is_WHITE_SPACE(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      if (0x23/* # */ === ch) {\n        do { ch = state.input.charCodeAt(++state.position); }\n        while (0 !== ch && !is_EOL(ch));\n        break;\n      }\n\n      if (is_EOL(ch)) {\n        break;\n      }\n\n      _position = state.position;\n\n      while (0 !== ch && !is_WS_OR_EOL(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      directiveArgs.push(state.input.slice(_position, state.position));\n    }\n\n    if (0 !== ch) {\n      readLineBreak(state);\n    }\n\n    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {\n      directiveHandlers[directiveName](state, directiveName, directiveArgs);\n    } else {\n      throwWarning(state, 'unknown document directive \"' + directiveName + '\"');\n    }\n  }\n\n  skipSeparationSpace(state, true, -1);\n\n  if (0 === state.lineIndent &&\n      0x2D/* - */ === state.input.charCodeAt(state.position) &&\n      0x2D/* - */ === state.input.charCodeAt(state.position + 1) &&\n      0x2D/* - */ === state.input.charCodeAt(state.position + 2)) {\n    state.position += 3;\n    skipSeparationSpace(state, true, -1);\n\n  } else if (hasDirectives) {\n    throwError(state, 'directives end mark is expected');\n  }\n\n  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);\n  skipSeparationSpace(state, true, -1);\n\n  if (state.checkLineBreaks &&\n      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {\n    throwWarning(state, 'non-ASCII line breaks are interpreted as content');\n  }\n\n  state.documents.push(state.result);\n\n  if (state.position === state.lineStart && testDocumentSeparator(state)) {\n\n    if (0x2E/* . */ === state.input.charCodeAt(state.position)) {\n      state.position += 3;\n      skipSeparationSpace(state, true, -1);\n    }\n    return;\n  }\n\n  if (state.position < (state.length - 1)) {\n    throwError(state, 'end of the stream or a document separator is expected');\n  } else {\n    return;\n  }\n}\n\n\nfunction loadDocuments(input, options) {\n  input = String(input);\n  options = options || {};\n\n  if (input.length !== 0) {\n\n    // Add tailing `\\n` if not exists\n    if (0x0A/* LF */ !== input.charCodeAt(input.length - 1) &&\n        0x0D/* CR */ !== input.charCodeAt(input.length - 1)) {\n      input += '\\n';\n    }\n\n    // Strip BOM\n    if (input.charCodeAt(0) === 0xFEFF) {\n      input = input.slice(1);\n    }\n  }\n\n  var state = new State(input, options);\n\n  if (PATTERN_NON_PRINTABLE.test(state.input)) {\n    throwError(state, 'the stream contains non-printable characters');\n  }\n\n  // Use 0 as string terminator. That significantly simplifies bounds check.\n  state.input += '\\0';\n\n  while (0x20/* Space */ === state.input.charCodeAt(state.position)) {\n    state.lineIndent += 1;\n    state.position += 1;\n  }\n\n  while (state.position < (state.length - 1)) {\n    readDocument(state);\n  }\n\n  return state.documents;\n}\n\n\nfunction loadAll(input, iterator, options) {\n  var documents = loadDocuments(input, options), index, length;\n\n  for (index = 0, length = documents.length; index < length; index += 1) {\n    iterator(documents[index]);\n  }\n}\n\n\nfunction load(input, options) {\n  var documents = loadDocuments(input, options);\n\n  if (0 === documents.length) {\n    /*eslint-disable no-undefined*/\n    return undefined;\n  } else if (1 === documents.length) {\n    return documents[0];\n  }\n  throw new YAMLException('expected a single document in the stream, but found more');\n}\n\n\nfunction safeLoadAll(input, output, options) {\n  loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nfunction safeLoad(input, options) {\n  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nmodule.exports.loadAll     = loadAll;\nmodule.exports.load        = load;\nmodule.exports.safeLoadAll = safeLoadAll;\nmodule.exports.safeLoad    = safeLoad;\n",
+    "'use strict';\n\n/*eslint-disable no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\n\nvar _toString       = Object.prototype.toString;\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\nvar CHAR_TAB                  = 0x09; /* Tab */\nvar CHAR_LINE_FEED            = 0x0A; /* LF */\nvar CHAR_CARRIAGE_RETURN      = 0x0D; /* CR */\nvar CHAR_SPACE                = 0x20; /* Space */\nvar CHAR_EXCLAMATION          = 0x21; /* ! */\nvar CHAR_DOUBLE_QUOTE         = 0x22; /* \" */\nvar CHAR_SHARP                = 0x23; /* # */\nvar CHAR_PERCENT              = 0x25; /* % */\nvar CHAR_AMPERSAND            = 0x26; /* & */\nvar CHAR_SINGLE_QUOTE         = 0x27; /* ' */\nvar CHAR_ASTERISK             = 0x2A; /* * */\nvar CHAR_COMMA                = 0x2C; /* , */\nvar CHAR_MINUS                = 0x2D; /* - */\nvar CHAR_COLON                = 0x3A; /* : */\nvar CHAR_GREATER_THAN         = 0x3E; /* > */\nvar CHAR_QUESTION             = 0x3F; /* ? */\nvar CHAR_COMMERCIAL_AT        = 0x40; /* @ */\nvar CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */\nvar CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */\nvar CHAR_GRAVE_ACCENT         = 0x60; /* ` */\nvar CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */\nvar CHAR_VERTICAL_LINE        = 0x7C; /* | */\nvar CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */\n\nvar ESCAPE_SEQUENCES = {};\n\nESCAPE_SEQUENCES[0x00]   = '\\\\0';\nESCAPE_SEQUENCES[0x07]   = '\\\\a';\nESCAPE_SEQUENCES[0x08]   = '\\\\b';\nESCAPE_SEQUENCES[0x09]   = '\\\\t';\nESCAPE_SEQUENCES[0x0A]   = '\\\\n';\nESCAPE_SEQUENCES[0x0B]   = '\\\\v';\nESCAPE_SEQUENCES[0x0C]   = '\\\\f';\nESCAPE_SEQUENCES[0x0D]   = '\\\\r';\nESCAPE_SEQUENCES[0x1B]   = '\\\\e';\nESCAPE_SEQUENCES[0x22]   = '\\\\\"';\nESCAPE_SEQUENCES[0x5C]   = '\\\\\\\\';\nESCAPE_SEQUENCES[0x85]   = '\\\\N';\nESCAPE_SEQUENCES[0xA0]   = '\\\\_';\nESCAPE_SEQUENCES[0x2028] = '\\\\L';\nESCAPE_SEQUENCES[0x2029] = '\\\\P';\n\nvar DEPRECATED_BOOLEANS_SYNTAX = [\n  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',\n  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'\n];\n\nfunction compileStyleMap(schema, map) {\n  var result, keys, index, length, tag, style, type;\n\n  if (null === map) {\n    return {};\n  }\n\n  result = {};\n  keys = Object.keys(map);\n\n  for (index = 0, length = keys.length; index < length; index += 1) {\n    tag = keys[index];\n    style = String(map[tag]);\n\n    if ('!!' === tag.slice(0, 2)) {\n      tag = 'tag:yaml.org,2002:' + tag.slice(2);\n    }\n\n    type = schema.compiledTypeMap[tag];\n\n    if (type && _hasOwnProperty.call(type.styleAliases, style)) {\n      style = type.styleAliases[style];\n    }\n\n    result[tag] = style;\n  }\n\n  return result;\n}\n\nfunction encodeHex(character) {\n  var string, handle, length;\n\n  string = character.toString(16).toUpperCase();\n\n  if (character <= 0xFF) {\n    handle = 'x';\n    length = 2;\n  } else if (character <= 0xFFFF) {\n    handle = 'u';\n    length = 4;\n  } else if (character <= 0xFFFFFFFF) {\n    handle = 'U';\n    length = 8;\n  } else {\n    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');\n  }\n\n  return '\\\\' + handle + common.repeat('0', length - string.length) + string;\n}\n\nfunction State(options) {\n  this.schema      = options['schema'] || DEFAULT_FULL_SCHEMA;\n  this.indent      = Math.max(1, (options['indent'] || 2));\n  this.skipInvalid = options['skipInvalid'] || false;\n  this.flowLevel   = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);\n  this.styleMap    = compileStyleMap(this.schema, options['styles'] || null);\n  this.sortKeys    = options['sortKeys'] || false;\n  this.lineWidth    = options['lineWidth'] || 80;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.explicitTypes = this.schema.compiledExplicit;\n\n  this.tag = null;\n  this.result = '';\n\n  this.duplicates = [];\n  this.usedDuplicates = null;\n}\n\nfunction indentString(string, spaces) {\n  var ind = common.repeat(' ', spaces),\n      position = 0,\n      next = -1,\n      result = '',\n      line,\n      length = string.length;\n\n  while (position < length) {\n    next = string.indexOf('\\n', position);\n    if (next === -1) {\n      line = string.slice(position);\n      position = length;\n    } else {\n      line = string.slice(position, next + 1);\n      position = next + 1;\n    }\n    if (line.length && line !== '\\n') {\n      result += ind;\n    }\n    result += line;\n  }\n\n  return result;\n}\n\nfunction generateNextLine(state, level) {\n  return '\\n' + common.repeat(' ', state.indent * level);\n}\n\nfunction testImplicitResolving(state, str) {\n  var index, length, type;\n\n  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {\n    type = state.implicitTypes[index];\n\n    if (type.resolve(str)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction StringBuilder(source) {\n  this.source = source;\n  this.result = '';\n  this.checkpoint = 0;\n}\n\nStringBuilder.prototype.takeUpTo = function (position) {\n  var er;\n\n  if (position < this.checkpoint) {\n    er = new Error('position should be > checkpoint');\n    er.position = position;\n    er.checkpoint = this.checkpoint;\n    throw er;\n  }\n\n  this.result += this.source.slice(this.checkpoint, position);\n  this.checkpoint = position;\n  return this;\n};\n\nStringBuilder.prototype.escapeChar = function () {\n  var character, esc;\n\n  character = this.source.charCodeAt(this.checkpoint);\n  esc = ESCAPE_SEQUENCES[character] || encodeHex(character);\n  this.result += esc;\n  this.checkpoint += 1;\n\n  return this;\n};\n\nStringBuilder.prototype.finish = function () {\n  if (this.source.length > this.checkpoint) {\n    this.takeUpTo(this.source.length);\n  }\n};\n\nfunction writeScalar(state, object, level, iskey) {\n  var simple, first, spaceWrap, folded, literal, single, double,\n      sawLineFeed, linePosition, longestLine, indent, max, character,\n      position, escapeSeq, hexEsc, previous, lineLength, modifier,\n      trailingLineBreaks, result;\n\n  if (0 === object.length) {\n    state.dump = \"''\";\n    return;\n  }\n\n  if (-1 !== DEPRECATED_BOOLEANS_SYNTAX.indexOf(object)) {\n    state.dump = \"'\" + object + \"'\";\n    return;\n  }\n\n  simple = true;\n  first = object.length ? object.charCodeAt(0) : 0;\n  spaceWrap = (CHAR_SPACE === first ||\n               CHAR_SPACE === object.charCodeAt(object.length - 1));\n\n  // Simplified check for restricted first characters\n  // http://www.yaml.org/spec/1.2/spec.html#ns-plain-first%28c%29\n  if (CHAR_MINUS         === first ||\n      CHAR_QUESTION      === first ||\n      CHAR_COMMERCIAL_AT === first ||\n      CHAR_GRAVE_ACCENT  === first) {\n    simple = false;\n  }\n\n  // can only use > and | if not wrapped in spaces or is not a key.\n  if (spaceWrap) {\n    simple = false;\n    folded = false;\n    literal = false;\n  } else {\n    folded = !iskey;\n    literal = !iskey;\n  }\n\n  single = true;\n  double = new StringBuilder(object);\n\n  sawLineFeed = false;\n  linePosition = 0;\n  longestLine = 0;\n\n  indent = state.indent * level;\n  max = state.lineWidth;\n  if (max === -1) {\n    // Replace -1 with biggest ingeger number according to\n    // http://ecma262-5.com/ELS5_HTML.htm#Section_8.5\n    max = 9007199254740991;\n  }\n\n  if (indent < 40) {\n    max -= indent;\n  } else {\n    max = 40;\n  }\n\n  for (position = 0; position < object.length; position++) {\n    character = object.charCodeAt(position);\n    if (simple) {\n      // Characters that can never appear in the simple scalar\n      if (!simpleChar(character)) {\n        simple = false;\n      } else {\n        // Still simple.  If we make it all the way through like\n        // this, then we can just dump the string as-is.\n        continue;\n      }\n    }\n\n    if (single && character === CHAR_SINGLE_QUOTE) {\n      single = false;\n    }\n\n    escapeSeq = ESCAPE_SEQUENCES[character];\n    hexEsc = needsHexEscape(character);\n\n    if (!escapeSeq && !hexEsc) {\n      continue;\n    }\n\n    if (character !== CHAR_LINE_FEED &&\n        character !== CHAR_DOUBLE_QUOTE &&\n        character !== CHAR_SINGLE_QUOTE) {\n      folded = false;\n      literal = false;\n    } else if (character === CHAR_LINE_FEED) {\n      sawLineFeed = true;\n      single = false;\n      if (position > 0) {\n        previous = object.charCodeAt(position - 1);\n        if (previous === CHAR_SPACE) {\n          literal = false;\n          folded = false;\n        }\n      }\n      if (folded) {\n        lineLength = position - linePosition;\n        linePosition = position;\n        if (lineLength > longestLine) {\n          longestLine = lineLength;\n        }\n      }\n    }\n\n    if (character !== CHAR_DOUBLE_QUOTE) {\n      single = false;\n    }\n\n    double.takeUpTo(position);\n    double.escapeChar();\n  }\n\n  if (simple && testImplicitResolving(state, object)) {\n    simple = false;\n  }\n\n  modifier = '';\n  if (folded || literal) {\n    trailingLineBreaks = 0;\n    if (object.charCodeAt(object.length - 1) === CHAR_LINE_FEED) {\n      trailingLineBreaks += 1;\n      if (object.charCodeAt(object.length - 2) === CHAR_LINE_FEED) {\n        trailingLineBreaks += 1;\n      }\n    }\n\n    if (trailingLineBreaks === 0) {\n      modifier = '-';\n    } else if (trailingLineBreaks === 2) {\n      modifier = '+';\n    }\n  }\n\n  if (literal && longestLine < max) {\n    folded = false;\n  }\n\n  // If it's literally one line, then don't bother with the literal.\n  // We may still want to do a fold, though, if it's a super long line.\n  if (!sawLineFeed) {\n    literal = false;\n  }\n\n  if (simple) {\n    state.dump = object;\n  } else if (single) {\n    state.dump = '\\'' + object + '\\'';\n  } else if (folded) {\n    result = fold(object, max);\n    state.dump = '>' + modifier + '\\n' + indentString(result, indent);\n  } else if (literal) {\n    if (!modifier) {\n      object = object.replace(/\\n$/, '');\n    }\n    state.dump = '|' + modifier + '\\n' + indentString(object, indent);\n  } else if (double) {\n    double.finish();\n    state.dump = '\"' + double.result + '\"';\n  } else {\n    throw new Error('Failed to dump scalar value');\n  }\n\n  return;\n}\n\n// The `trailing` var is a regexp match of any trailing `\\n` characters.\n//\n// There are three cases we care about:\n//\n// 1. One trailing `\\n` on the string.  Just use `|` or `>`.\n//    This is the assumed default. (trailing = null)\n// 2. No trailing `\\n` on the string.  Use `|-` or `>-` to \"chomp\" the end.\n// 3. More than one trailing `\\n` on the string.  Use `|+` or `>+`.\n//\n// In the case of `>+`, these line breaks are *not* doubled (like the line\n// breaks within the string), so it's important to only end with the exact\n// same number as we started.\nfunction fold(object, max) {\n  var result = '',\n      position = 0,\n      length = object.length,\n      trailing = /\\n+$/.exec(object),\n      newLine;\n\n  if (trailing) {\n    length = trailing.index + 1;\n  }\n\n  while (position < length) {\n    newLine = object.indexOf('\\n', position);\n    if (newLine > length || newLine === -1) {\n      if (result) {\n        result += '\\n\\n';\n      }\n      result += foldLine(object.slice(position, length), max);\n      position = length;\n    } else {\n      if (result) {\n        result += '\\n\\n';\n      }\n      result += foldLine(object.slice(position, newLine), max);\n      position = newLine + 1;\n    }\n  }\n  if (trailing && trailing[0] !== '\\n') {\n    result += trailing[0];\n  }\n\n  return result;\n}\n\nfunction foldLine(line, max) {\n  if (line === '') {\n    return line;\n  }\n\n  var foldRe = /[^\\s] [^\\s]/g,\n      result = '',\n      prevMatch = 0,\n      foldStart = 0,\n      match = foldRe.exec(line),\n      index,\n      foldEnd,\n      folded;\n\n  while (match) {\n    index = match.index;\n\n    // when we cross the max len, if the previous match would've\n    // been ok, use that one, and carry on.  If there was no previous\n    // match on this fold section, then just have a long line.\n    if (index - foldStart > max) {\n      if (prevMatch !== foldStart) {\n        foldEnd = prevMatch;\n      } else {\n        foldEnd = index;\n      }\n\n      if (result) {\n        result += '\\n';\n      }\n      folded = line.slice(foldStart, foldEnd);\n      result += folded;\n      foldStart = foldEnd + 1;\n    }\n    prevMatch = index + 1;\n    match = foldRe.exec(line);\n  }\n\n  if (result) {\n    result += '\\n';\n  }\n\n  // if we end up with one last word at the end, then the last bit might\n  // be slightly bigger than we wanted, because we exited out of the loop.\n  if (foldStart !== prevMatch && line.length - foldStart > max) {\n    result += line.slice(foldStart, prevMatch) + '\\n' +\n              line.slice(prevMatch + 1);\n  } else {\n    result += line.slice(foldStart);\n  }\n\n  return result;\n}\n\n// Returns true if character can be found in a simple scalar\nfunction simpleChar(character) {\n  return CHAR_TAB                  !== character &&\n         CHAR_LINE_FEED            !== character &&\n         CHAR_CARRIAGE_RETURN      !== character &&\n         CHAR_COMMA                !== character &&\n         CHAR_LEFT_SQUARE_BRACKET  !== character &&\n         CHAR_RIGHT_SQUARE_BRACKET !== character &&\n         CHAR_LEFT_CURLY_BRACKET   !== character &&\n         CHAR_RIGHT_CURLY_BRACKET  !== character &&\n         CHAR_SHARP                !== character &&\n         CHAR_AMPERSAND            !== character &&\n         CHAR_ASTERISK             !== character &&\n         CHAR_EXCLAMATION          !== character &&\n         CHAR_VERTICAL_LINE        !== character &&\n         CHAR_GREATER_THAN         !== character &&\n         CHAR_SINGLE_QUOTE         !== character &&\n         CHAR_DOUBLE_QUOTE         !== character &&\n         CHAR_PERCENT              !== character &&\n         CHAR_COLON                !== character &&\n         !ESCAPE_SEQUENCES[character]            &&\n         !needsHexEscape(character);\n}\n\n// Returns true if the character code needs to be escaped.\nfunction needsHexEscape(character) {\n  return !((0x00020 <= character && character <= 0x00007E) ||\n           (0x00085 === character)                         ||\n           (0x000A0 <= character && character <= 0x00D7FF) ||\n           (0x0E000 <= character && character <= 0x00FFFD) ||\n           (0x10000 <= character && character <= 0x10FFFF));\n}\n\nfunction writeFlowSequence(state, level, object) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level, object[index], false, false)) {\n      if (0 !== index) {\n        _result += ', ';\n      }\n      _result += state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = '[' + _result + ']';\n}\n\nfunction writeBlockSequence(state, level, object, compact) {\n  var _result = '',\n      _tag    = state.tag,\n      index,\n      length;\n\n  for (index = 0, length = object.length; index < length; index += 1) {\n    // Write only valid elements.\n    if (writeNode(state, level + 1, object[index], true, true)) {\n      if (!compact || 0 !== index) {\n        _result += generateNextLine(state, level);\n      }\n      _result += '- ' + state.dump;\n    }\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '[]'; // Empty sequence if no valid values.\n}\n\nfunction writeFlowMapping(state, level, object) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      pairBuffer;\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (0 !== index) {\n      pairBuffer += ', ';\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level, objectKey, false, false)) {\n      continue; // Skip this pair because of invalid key;\n    }\n\n    if (state.dump.length > 1024) {\n      pairBuffer += '? ';\n    }\n\n    pairBuffer += state.dump + ': ';\n\n    if (!writeNode(state, level, objectValue, false, false)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = '{' + _result + '}';\n}\n\nfunction writeBlockMapping(state, level, object, compact) {\n  var _result       = '',\n      _tag          = state.tag,\n      objectKeyList = Object.keys(object),\n      index,\n      length,\n      objectKey,\n      objectValue,\n      explicitPair,\n      pairBuffer;\n\n  // Allow sorting keys so that the output file is deterministic\n  if (state.sortKeys === true) {\n    // Default sorting\n    objectKeyList.sort();\n  } else if (typeof state.sortKeys === 'function') {\n    // Custom sort function\n    objectKeyList.sort(state.sortKeys);\n  } else if (state.sortKeys) {\n    // Something is wrong\n    throw new YAMLException('sortKeys must be a boolean or a function');\n  }\n\n  for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n    pairBuffer = '';\n\n    if (!compact || 0 !== index) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    objectKey = objectKeyList[index];\n    objectValue = object[objectKey];\n\n    if (!writeNode(state, level + 1, objectKey, true, true, true)) {\n      continue; // Skip this pair because of invalid key.\n    }\n\n    explicitPair = (null !== state.tag && '?' !== state.tag) ||\n                   (state.dump && state.dump.length > 1024);\n\n    if (explicitPair) {\n      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n        pairBuffer += '?';\n      } else {\n        pairBuffer += '? ';\n      }\n    }\n\n    pairBuffer += state.dump;\n\n    if (explicitPair) {\n      pairBuffer += generateNextLine(state, level);\n    }\n\n    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {\n      continue; // Skip this pair because of invalid value.\n    }\n\n    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {\n      pairBuffer += ':';\n    } else {\n      pairBuffer += ': ';\n    }\n\n    pairBuffer += state.dump;\n\n    // Both key and value are valid.\n    _result += pairBuffer;\n  }\n\n  state.tag = _tag;\n  state.dump = _result || '{}'; // Empty mapping if no valid pairs.\n}\n\nfunction detectType(state, object, explicit) {\n  var _result, typeList, index, length, type, style;\n\n  typeList = explicit ? state.explicitTypes : state.implicitTypes;\n\n  for (index = 0, length = typeList.length; index < length; index += 1) {\n    type = typeList[index];\n\n    if ((type.instanceOf  || type.predicate) &&\n        (!type.instanceOf || (('object' === typeof object) && (object instanceof type.instanceOf))) &&\n        (!type.predicate  || type.predicate(object))) {\n\n      state.tag = explicit ? type.tag : '?';\n\n      if (type.represent) {\n        style = state.styleMap[type.tag] || type.defaultStyle;\n\n        if ('[object Function]' === _toString.call(type.represent)) {\n          _result = type.represent(object, style);\n        } else if (_hasOwnProperty.call(type.represent, style)) {\n          _result = type.represent[style](object, style);\n        } else {\n          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not \"' + style + '\" style');\n        }\n\n        state.dump = _result;\n      }\n\n      return true;\n    }\n  }\n\n  return false;\n}\n\n// Serializes `object` and writes it to global `result`.\n// Returns true on success, or false on invalid object.\n//\nfunction writeNode(state, level, object, block, compact, iskey) {\n  state.tag = null;\n  state.dump = object;\n\n  if (!detectType(state, object, false)) {\n    detectType(state, object, true);\n  }\n\n  var type = _toString.call(state.dump);\n\n  if (block) {\n    block = (0 > state.flowLevel || state.flowLevel > level);\n  }\n\n  var objectOrArray = '[object Object]' === type || '[object Array]' === type,\n      duplicateIndex,\n      duplicate;\n\n  if (objectOrArray) {\n    duplicateIndex = state.duplicates.indexOf(object);\n    duplicate = duplicateIndex !== -1;\n  }\n\n  if ((null !== state.tag && '?' !== state.tag) || duplicate || (2 !== state.indent && level > 0)) {\n    compact = false;\n  }\n\n  if (duplicate && state.usedDuplicates[duplicateIndex]) {\n    state.dump = '*ref_' + duplicateIndex;\n  } else {\n    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {\n      state.usedDuplicates[duplicateIndex] = true;\n    }\n    if ('[object Object]' === type) {\n      if (block && (0 !== Object.keys(state.dump).length)) {\n        writeBlockMapping(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowMapping(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if ('[object Array]' === type) {\n      if (block && (0 !== state.dump.length)) {\n        writeBlockSequence(state, level, state.dump, compact);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + state.dump;\n        }\n      } else {\n        writeFlowSequence(state, level, state.dump);\n        if (duplicate) {\n          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;\n        }\n      }\n    } else if ('[object String]' === type) {\n      if ('?' !== state.tag) {\n        writeScalar(state, state.dump, level, iskey);\n      }\n    } else {\n      if (state.skipInvalid) {\n        return false;\n      }\n      throw new YAMLException('unacceptable kind of an object to dump ' + type);\n    }\n\n    if (null !== state.tag && '?' !== state.tag) {\n      state.dump = '!<' + state.tag + '> ' + state.dump;\n    }\n  }\n\n  return true;\n}\n\nfunction getDuplicateReferences(object, state) {\n  var objects = [],\n      duplicatesIndexes = [],\n      index,\n      length;\n\n  inspectNode(object, objects, duplicatesIndexes);\n\n  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {\n    state.duplicates.push(objects[duplicatesIndexes[index]]);\n  }\n  state.usedDuplicates = new Array(length);\n}\n\nfunction inspectNode(object, objects, duplicatesIndexes) {\n  var objectKeyList,\n      index,\n      length;\n\n  if (null !== object && 'object' === typeof object) {\n    index = objects.indexOf(object);\n    if (-1 !== index) {\n      if (-1 === duplicatesIndexes.indexOf(index)) {\n        duplicatesIndexes.push(index);\n      }\n    } else {\n      objects.push(object);\n\n      if (Array.isArray(object)) {\n        for (index = 0, length = object.length; index < length; index += 1) {\n          inspectNode(object[index], objects, duplicatesIndexes);\n        }\n      } else {\n        objectKeyList = Object.keys(object);\n\n        for (index = 0, length = objectKeyList.length; index < length; index += 1) {\n          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);\n        }\n      }\n    }\n  }\n}\n\nfunction dump(input, options) {\n  options = options || {};\n\n  var state = new State(options);\n\n  getDuplicateReferences(input, state);\n\n  if (writeNode(state, 0, input, true, true)) {\n    return state.dump + '\\n';\n  }\n  return '';\n}\n\nfunction safeDump(input, options) {\n  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\nmodule.exports.dump     = dump;\nmodule.exports.safeDump = safeDump;\n",
+    "// YAML error class. http://stackoverflow.com/questions/8458984\n//\n'use strict';\n\n\nvar inherits = require('inherit');\n\n\nfunction YAMLException(reason, mark) {\n  // Super constructor\n  Error.call(this);\n\n  // Include stack trace in error object\n  if (Error.captureStackTrace) {\n    // Chrome and NodeJS\n    Error.captureStackTrace(this, this.constructor);\n  } else {\n    // FF, IE 10+ and Safari 6+. Fallback for others\n    this.stack = (new Error()).stack || '';\n  }\n\n  this.name = 'YAMLException';\n  this.reason = reason;\n  this.mark = mark;\n  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');\n}\n\n\n// Inherit from Error\ninherits(YAMLException, Error);\n\n\nYAMLException.prototype.toString = function toString(compact) {\n  var result = this.name + ': ';\n\n  result += this.reason || '(unknown reason)';\n\n  if (!compact && this.mark) {\n    result += ' ' + this.mark.toString();\n  }\n\n  return result;\n};\n\n\nmodule.exports = YAMLException;\n",
+    "'use strict';\n\n/*eslint-disable max-len,no-use-before-define*/\n\nvar common              = require('./common');\nvar YAMLException       = require('./exception');\nvar Mark                = require('./mark');\nvar DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');\nvar DEFAULT_FULL_SCHEMA = require('./schema/default_full');\n\n\nvar _hasOwnProperty = Object.prototype.hasOwnProperty;\n\n\nvar CONTEXT_FLOW_IN   = 1;\nvar CONTEXT_FLOW_OUT  = 2;\nvar CONTEXT_BLOCK_IN  = 3;\nvar CONTEXT_BLOCK_OUT = 4;\n\n\nvar CHOMPING_CLIP  = 1;\nvar CHOMPING_STRIP = 2;\nvar CHOMPING_KEEP  = 3;\n\n\nvar PATTERN_NON_PRINTABLE         = /[\\x00-\\x08\\x0B\\x0C\\x0E-\\x1F\\x7F-\\x84\\x86-\\x9F\\uFFFE\\uFFFF]|[\\uD800-\\uDBFF](?![\\uDC00-\\uDFFF])|(?:[^\\uD800-\\uDBFF]|^)[\\uDC00-\\uDFFF]/;\nvar PATTERN_NON_ASCII_LINE_BREAKS = /[\\x85\\u2028\\u2029]/;\nvar PATTERN_FLOW_INDICATORS       = /[,\\[\\]\\{\\}]/;\nvar PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\\-]+!)$/i;\nvar PATTERN_TAG_URI               = /^(?:!|[^,\\[\\]\\{\\}])(?:%[0-9a-f]{2}|[0-9a-z\\-#;\\/\\?:@&=\\+\\$,_\\.!~\\*'\\(\\)\\[\\]])*$/i;\n\n\nfunction is_EOL(c) {\n  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);\n}\n\nfunction is_WHITE_SPACE(c) {\n  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);\n}\n\nfunction is_WS_OR_EOL(c) {\n  return (c === 0x09/* Tab */) ||\n         (c === 0x20/* Space */) ||\n         (c === 0x0A/* LF */) ||\n         (c === 0x0D/* CR */);\n}\n\nfunction is_FLOW_INDICATOR(c) {\n  return 0x2C/* , */ === c ||\n         0x5B/* [ */ === c ||\n         0x5D/* ] */ === c ||\n         0x7B/* { */ === c ||\n         0x7D/* } */ === c;\n}\n\nfunction fromHexCode(c) {\n  var lc;\n\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  /*eslint-disable no-bitwise*/\n  lc = c | 0x20;\n\n  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {\n    return lc - 0x61 + 10;\n  }\n\n  return -1;\n}\n\nfunction escapedHexLen(c) {\n  if (c === 0x78/* x */) { return 2; }\n  if (c === 0x75/* u */) { return 4; }\n  if (c === 0x55/* U */) { return 8; }\n  return 0;\n}\n\nfunction fromDecimalCode(c) {\n  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {\n    return c - 0x30;\n  }\n\n  return -1;\n}\n\nfunction simpleEscapeSequence(c) {\n  return (c === 0x30/* 0 */) ? '\\x00' :\n        (c === 0x61/* a */) ? '\\x07' :\n        (c === 0x62/* b */) ? '\\x08' :\n        (c === 0x74/* t */) ? '\\x09' :\n        (c === 0x09/* Tab */) ? '\\x09' :\n        (c === 0x6E/* n */) ? '\\x0A' :\n        (c === 0x76/* v */) ? '\\x0B' :\n        (c === 0x66/* f */) ? '\\x0C' :\n        (c === 0x72/* r */) ? '\\x0D' :\n        (c === 0x65/* e */) ? '\\x1B' :\n        (c === 0x20/* Space */) ? ' ' :\n        (c === 0x22/* \" */) ? '\\x22' :\n        (c === 0x2F/* / */) ? '/' :\n        (c === 0x5C/* \\ */) ? '\\x5C' :\n        (c === 0x4E/* N */) ? '\\x85' :\n        (c === 0x5F/* _ */) ? '\\xA0' :\n        (c === 0x4C/* L */) ? '\\u2028' :\n        (c === 0x50/* P */) ? '\\u2029' : '';\n}\n\nfunction charFromCodepoint(c) {\n  if (c <= 0xFFFF) {\n    return String.fromCharCode(c);\n  }\n  // Encode UTF-16 surrogate pair\n  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF\n  return String.fromCharCode(((c - 0x010000) >> 10) + 0xD800,\n                             ((c - 0x010000) & 0x03FF) + 0xDC00);\n}\n\nvar simpleEscapeCheck = new Array(256); // integer, for fast access\nvar simpleEscapeMap = new Array(256);\nfor (var i = 0; i < 256; i++) {\n  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;\n  simpleEscapeMap[i] = simpleEscapeSequence(i);\n}\n\n\nfunction State(input, options) {\n  this.input = input;\n\n  this.filename  = options['filename']  || null;\n  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;\n  this.onWarning = options['onWarning'] || null;\n  this.legacy    = options['legacy']    || false;\n\n  this.implicitTypes = this.schema.compiledImplicit;\n  this.typeMap       = this.schema.compiledTypeMap;\n\n  this.length     = input.length;\n  this.position   = 0;\n  this.line       = 0;\n  this.lineStart  = 0;\n  this.lineIndent = 0;\n\n  this.documents = [];\n\n  /*\n  this.version;\n  this.checkLineBreaks;\n  this.tagMap;\n  this.anchorMap;\n  this.tag;\n  this.anchor;\n  this.kind;\n  this.result;*/\n\n}\n\n\nfunction generateError(state, message) {\n  return new YAMLException(\n    message,\n    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));\n}\n\nfunction throwError(state, message) {\n  throw generateError(state, message);\n}\n\nfunction throwWarning(state, message) {\n  if (state.onWarning) {\n    state.onWarning.call(null, generateError(state, message));\n  }\n}\n\n\nvar directiveHandlers = {\n\n  YAML: function handleYamlDirective(state, name, args) {\n\n      var match, major, minor;\n\n      if (null !== state.version) {\n        throwError(state, 'duplication of %YAML directive');\n      }\n\n      if (1 !== args.length) {\n        throwError(state, 'YAML directive accepts exactly one argument');\n      }\n\n      match = /^([0-9]+)\\.([0-9]+)$/.exec(args[0]);\n\n      if (null === match) {\n        throwError(state, 'ill-formed argument of the YAML directive');\n      }\n\n      major = parseInt(match[1], 10);\n      minor = parseInt(match[2], 10);\n\n      if (1 !== major) {\n        throwError(state, 'unacceptable YAML version of the document');\n      }\n\n      state.version = args[0];\n      state.checkLineBreaks = (minor < 2);\n\n      if (1 !== minor && 2 !== minor) {\n        throwWarning(state, 'unsupported YAML version of the document');\n      }\n    },\n\n  TAG: function handleTagDirective(state, name, args) {\n\n      var handle, prefix;\n\n      if (2 !== args.length) {\n        throwError(state, 'TAG directive accepts exactly two arguments');\n      }\n\n      handle = args[0];\n      prefix = args[1];\n\n      if (!PATTERN_TAG_HANDLE.test(handle)) {\n        throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');\n      }\n\n      if (_hasOwnProperty.call(state.tagMap, handle)) {\n        throwError(state, 'there is a previously declared suffix for \"' + handle + '\" tag handle');\n      }\n\n      if (!PATTERN_TAG_URI.test(prefix)) {\n        throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');\n      }\n\n      state.tagMap[handle] = prefix;\n    }\n};\n\n\nfunction captureSegment(state, start, end, checkJson) {\n  var _position, _length, _character, _result;\n\n  if (start < end) {\n    _result = state.input.slice(start, end);\n\n    if (checkJson) {\n      for (_position = 0, _length = _result.length;\n           _position < _length;\n           _position += 1) {\n        _character = _result.charCodeAt(_position);\n        if (!(0x09 === _character ||\n              0x20 <= _character && _character <= 0x10FFFF)) {\n          throwError(state, 'expected valid JSON character');\n        }\n      }\n    } else if (PATTERN_NON_PRINTABLE.test(_result)) {\n      throwError(state, 'the stream contains non-printable characters');\n    }\n\n    state.result += _result;\n  }\n}\n\nfunction mergeMappings(state, destination, source) {\n  var sourceKeys, key, index, quantity;\n\n  if (!common.isObject(source)) {\n    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');\n  }\n\n  sourceKeys = Object.keys(source);\n\n  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {\n    key = sourceKeys[index];\n\n    if (!_hasOwnProperty.call(destination, key)) {\n      destination[key] = source[key];\n    }\n  }\n}\n\nfunction storeMappingPair(state, _result, keyTag, keyNode, valueNode) {\n  var index, quantity;\n\n  keyNode = String(keyNode);\n\n  if (null === _result) {\n    _result = {};\n  }\n\n  if ('tag:yaml.org,2002:merge' === keyTag) {\n    if (Array.isArray(valueNode)) {\n      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {\n        mergeMappings(state, _result, valueNode[index]);\n      }\n    } else {\n      mergeMappings(state, _result, valueNode);\n    }\n  } else {\n    _result[keyNode] = valueNode;\n  }\n\n  return _result;\n}\n\nfunction readLineBreak(state) {\n  var ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x0A/* LF */ === ch) {\n    state.position++;\n  } else if (0x0D/* CR */ === ch) {\n    state.position++;\n    if (0x0A/* LF */ === state.input.charCodeAt(state.position)) {\n      state.position++;\n    }\n  } else {\n    throwError(state, 'a line break is expected');\n  }\n\n  state.line += 1;\n  state.lineStart = state.position;\n}\n\nfunction skipSeparationSpace(state, allowComments, checkIndent) {\n  var lineBreaks = 0,\n      ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n    while (is_WHITE_SPACE(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (allowComments && 0x23/* # */ === ch) {\n      do {\n        ch = state.input.charCodeAt(++state.position);\n      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && 0 !== ch);\n    }\n\n    if (is_EOL(ch)) {\n      readLineBreak(state);\n\n      ch = state.input.charCodeAt(state.position);\n      lineBreaks++;\n      state.lineIndent = 0;\n\n      while (0x20/* Space */ === ch) {\n        state.lineIndent++;\n        ch = state.input.charCodeAt(++state.position);\n      }\n    } else {\n      break;\n    }\n  }\n\n  if (-1 !== checkIndent && 0 !== lineBreaks && state.lineIndent < checkIndent) {\n    throwWarning(state, 'deficient indentation');\n  }\n\n  return lineBreaks;\n}\n\nfunction testDocumentSeparator(state) {\n  var _position = state.position,\n      ch;\n\n  ch = state.input.charCodeAt(_position);\n\n  // Condition state.position === state.lineStart is tested\n  // in parent on each call, for efficiency. No needs to test here again.\n  if ((0x2D/* - */ === ch || 0x2E/* . */ === ch) &&\n      state.input.charCodeAt(_position + 1) === ch &&\n      state.input.charCodeAt(_position + 2) === ch) {\n\n    _position += 3;\n\n    ch = state.input.charCodeAt(_position);\n\n    if (ch === 0 || is_WS_OR_EOL(ch)) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction writeFoldedLines(state, count) {\n  if (1 === count) {\n    state.result += ' ';\n  } else if (count > 1) {\n    state.result += common.repeat('\\n', count - 1);\n  }\n}\n\n\nfunction readPlainScalar(state, nodeIndent, withinFlowCollection) {\n  var preceding,\n      following,\n      captureStart,\n      captureEnd,\n      hasPendingContent,\n      _line,\n      _lineStart,\n      _lineIndent,\n      _kind = state.kind,\n      _result = state.result,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (is_WS_OR_EOL(ch)             ||\n      is_FLOW_INDICATOR(ch)        ||\n      0x23/* # */           === ch ||\n      0x26/* & */           === ch ||\n      0x2A/* * */           === ch ||\n      0x21/* ! */           === ch ||\n      0x7C/* | */           === ch ||\n      0x3E/* > */           === ch ||\n      0x27/* ' */           === ch ||\n      0x22/* \" */           === ch ||\n      0x25/* % */           === ch ||\n      0x40/* @ */           === ch ||\n      0x60/* ` */           === ch) {\n    return false;\n  }\n\n  if (0x3F/* ? */ === ch || 0x2D/* - */ === ch) {\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (is_WS_OR_EOL(following) ||\n        withinFlowCollection && is_FLOW_INDICATOR(following)) {\n      return false;\n    }\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  captureStart = captureEnd = state.position;\n  hasPendingContent = false;\n\n  while (0 !== ch) {\n    if (0x3A/* : */ === ch) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following) ||\n          withinFlowCollection && is_FLOW_INDICATOR(following)) {\n        break;\n      }\n\n    } else if (0x23/* # */ === ch) {\n      preceding = state.input.charCodeAt(state.position - 1);\n\n      if (is_WS_OR_EOL(preceding)) {\n        break;\n      }\n\n    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||\n               withinFlowCollection && is_FLOW_INDICATOR(ch)) {\n      break;\n\n    } else if (is_EOL(ch)) {\n      _line = state.line;\n      _lineStart = state.lineStart;\n      _lineIndent = state.lineIndent;\n      skipSeparationSpace(state, false, -1);\n\n      if (state.lineIndent >= nodeIndent) {\n        hasPendingContent = true;\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      } else {\n        state.position = captureEnd;\n        state.line = _line;\n        state.lineStart = _lineStart;\n        state.lineIndent = _lineIndent;\n        break;\n      }\n    }\n\n    if (hasPendingContent) {\n      captureSegment(state, captureStart, captureEnd, false);\n      writeFoldedLines(state, state.line - _line);\n      captureStart = captureEnd = state.position;\n      hasPendingContent = false;\n    }\n\n    if (!is_WHITE_SPACE(ch)) {\n      captureEnd = state.position + 1;\n    }\n\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  captureSegment(state, captureStart, captureEnd, false);\n\n  if (state.result) {\n    return true;\n  }\n\n  state.kind = _kind;\n  state.result = _result;\n  return false;\n}\n\nfunction readSingleQuotedScalar(state, nodeIndent) {\n  var ch,\n      captureStart, captureEnd;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x27/* ' */ !== ch) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    if (0x27/* ' */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (0x27/* ' */ === ch) {\n        captureStart = captureEnd = state.position;\n        state.position++;\n      } else {\n        return true;\n      }\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a single quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a single quoted scalar');\n}\n\nfunction readDoubleQuotedScalar(state, nodeIndent) {\n  var captureStart,\n      captureEnd,\n      hexLength,\n      hexResult,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x22/* \" */ !== ch) {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n  state.position++;\n  captureStart = captureEnd = state.position;\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    if (0x22/* \" */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      state.position++;\n      return true;\n\n    } else if (0x5C/* \\ */ === ch) {\n      captureSegment(state, captureStart, state.position, true);\n      ch = state.input.charCodeAt(++state.position);\n\n      if (is_EOL(ch)) {\n        skipSeparationSpace(state, false, nodeIndent);\n\n        // TODO: rework to inline fn with no type cast?\n      } else if (ch < 256 && simpleEscapeCheck[ch]) {\n        state.result += simpleEscapeMap[ch];\n        state.position++;\n\n      } else if ((tmp = escapedHexLen(ch)) > 0) {\n        hexLength = tmp;\n        hexResult = 0;\n\n        for (; hexLength > 0; hexLength--) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if ((tmp = fromHexCode(ch)) >= 0) {\n            hexResult = (hexResult << 4) + tmp;\n\n          } else {\n            throwError(state, 'expected hexadecimal character');\n          }\n        }\n\n        state.result += charFromCodepoint(hexResult);\n\n        state.position++;\n\n      } else {\n        throwError(state, 'unknown escape sequence');\n      }\n\n      captureStart = captureEnd = state.position;\n\n    } else if (is_EOL(ch)) {\n      captureSegment(state, captureStart, captureEnd, true);\n      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));\n      captureStart = captureEnd = state.position;\n\n    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {\n      throwError(state, 'unexpected end of the document within a double quoted scalar');\n\n    } else {\n      state.position++;\n      captureEnd = state.position;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a double quoted scalar');\n}\n\nfunction readFlowCollection(state, nodeIndent) {\n  var readNext = true,\n      _line,\n      _tag     = state.tag,\n      _result,\n      _anchor  = state.anchor,\n      following,\n      terminator,\n      isPair,\n      isExplicitPair,\n      isMapping,\n      keyNode,\n      keyTag,\n      valueNode,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x5B/* [ */) {\n    terminator = 0x5D;/* ] */\n    isMapping = false;\n    _result = [];\n  } else if (ch === 0x7B/* { */) {\n    terminator = 0x7D;/* } */\n    isMapping = true;\n    _result = {};\n  } else {\n    return false;\n  }\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  while (0 !== ch) {\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (ch === terminator) {\n      state.position++;\n      state.tag = _tag;\n      state.anchor = _anchor;\n      state.kind = isMapping ? 'mapping' : 'sequence';\n      state.result = _result;\n      return true;\n    } else if (!readNext) {\n      throwError(state, 'missed comma between flow collection entries');\n    }\n\n    keyTag = keyNode = valueNode = null;\n    isPair = isExplicitPair = false;\n\n    if (0x3F/* ? */ === ch) {\n      following = state.input.charCodeAt(state.position + 1);\n\n      if (is_WS_OR_EOL(following)) {\n        isPair = isExplicitPair = true;\n        state.position++;\n        skipSeparationSpace(state, true, nodeIndent);\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n    keyTag = state.tag;\n    keyNode = state.result;\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((isExplicitPair || state.line === _line) && 0x3A/* : */ === ch) {\n      isPair = true;\n      ch = state.input.charCodeAt(++state.position);\n      skipSeparationSpace(state, true, nodeIndent);\n      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);\n      valueNode = state.result;\n    }\n\n    if (isMapping) {\n      storeMappingPair(state, _result, keyTag, keyNode, valueNode);\n    } else if (isPair) {\n      _result.push(storeMappingPair(state, null, keyTag, keyNode, valueNode));\n    } else {\n      _result.push(keyNode);\n    }\n\n    skipSeparationSpace(state, true, nodeIndent);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (0x2C/* , */ === ch) {\n      readNext = true;\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      readNext = false;\n    }\n  }\n\n  throwError(state, 'unexpected end of the stream within a flow collection');\n}\n\nfunction readBlockScalar(state, nodeIndent) {\n  var captureStart,\n      folding,\n      chomping       = CHOMPING_CLIP,\n      detectedIndent = false,\n      textIndent     = nodeIndent,\n      emptyLines     = 0,\n      atMoreIndented = false,\n      tmp,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (ch === 0x7C/* | */) {\n    folding = false;\n  } else if (ch === 0x3E/* > */) {\n    folding = true;\n  } else {\n    return false;\n  }\n\n  state.kind = 'scalar';\n  state.result = '';\n\n  while (0 !== ch) {\n    ch = state.input.charCodeAt(++state.position);\n\n    if (0x2B/* + */ === ch || 0x2D/* - */ === ch) {\n      if (CHOMPING_CLIP === chomping) {\n        chomping = (0x2B/* + */ === ch) ? CHOMPING_KEEP : CHOMPING_STRIP;\n      } else {\n        throwError(state, 'repeat of a chomping mode identifier');\n      }\n\n    } else if ((tmp = fromDecimalCode(ch)) >= 0) {\n      if (tmp === 0) {\n        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');\n      } else if (!detectedIndent) {\n        textIndent = nodeIndent + tmp - 1;\n        detectedIndent = true;\n      } else {\n        throwError(state, 'repeat of an indentation width identifier');\n      }\n\n    } else {\n      break;\n    }\n  }\n\n  if (is_WHITE_SPACE(ch)) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (is_WHITE_SPACE(ch));\n\n    if (0x23/* # */ === ch) {\n      do { ch = state.input.charCodeAt(++state.position); }\n      while (!is_EOL(ch) && (0 !== ch));\n    }\n  }\n\n  while (0 !== ch) {\n    readLineBreak(state);\n    state.lineIndent = 0;\n\n    ch = state.input.charCodeAt(state.position);\n\n    while ((!detectedIndent || state.lineIndent < textIndent) &&\n           (0x20/* Space */ === ch)) {\n      state.lineIndent++;\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    if (!detectedIndent && state.lineIndent > textIndent) {\n      textIndent = state.lineIndent;\n    }\n\n    if (is_EOL(ch)) {\n      emptyLines++;\n      continue;\n    }\n\n    // End of the scalar.\n    if (state.lineIndent < textIndent) {\n\n      // Perform the chomping.\n      if (chomping === CHOMPING_KEEP) {\n        state.result += common.repeat('\\n', emptyLines);\n      } else if (chomping === CHOMPING_CLIP) {\n        if (detectedIndent) { // i.e. only if the scalar is not empty.\n          state.result += '\\n';\n        }\n      }\n\n      // Break this `while` cycle and go to the funciton's epilogue.\n      break;\n    }\n\n    // Folded style: use fancy rules to handle line breaks.\n    if (folding) {\n\n      // Lines starting with white space characters (more-indented lines) are not folded.\n      if (is_WHITE_SPACE(ch)) {\n        atMoreIndented = true;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // End of more-indented block.\n      } else if (atMoreIndented) {\n        atMoreIndented = false;\n        state.result += common.repeat('\\n', emptyLines + 1);\n\n      // Just one line break - perceive as the same line.\n      } else if (0 === emptyLines) {\n        if (detectedIndent) { // i.e. only if we have already read some scalar content.\n          state.result += ' ';\n        }\n\n      // Several line breaks - perceive as different lines.\n      } else {\n        state.result += common.repeat('\\n', emptyLines);\n      }\n\n    // Literal style: just add exact number of line breaks between content lines.\n    } else if (detectedIndent) {\n      // If current line isn't the first one - count line break from the last content line.\n      state.result += common.repeat('\\n', emptyLines + 1);\n    } else {\n      // In case of the first content line - count only empty lines.\n      state.result += common.repeat('\\n', emptyLines);\n    }\n\n    detectedIndent = true;\n    emptyLines = 0;\n    captureStart = state.position;\n\n    while (!is_EOL(ch) && (0 !== ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    captureSegment(state, captureStart, state.position, false);\n  }\n\n  return true;\n}\n\nfunction readBlockSequence(state, nodeIndent) {\n  var _line,\n      _tag      = state.tag,\n      _anchor   = state.anchor,\n      _result   = [],\n      following,\n      detected  = false,\n      ch;\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n\n    if (0x2D/* - */ !== ch) {\n      break;\n    }\n\n    following = state.input.charCodeAt(state.position + 1);\n\n    if (!is_WS_OR_EOL(following)) {\n      break;\n    }\n\n    detected = true;\n    state.position++;\n\n    if (skipSeparationSpace(state, true, -1)) {\n      if (state.lineIndent <= nodeIndent) {\n        _result.push(null);\n        ch = state.input.charCodeAt(state.position);\n        continue;\n      }\n    }\n\n    _line = state.line;\n    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);\n    _result.push(state.result);\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if ((state.line === _line || state.lineIndent > nodeIndent) && (0 !== ch)) {\n      throwError(state, 'bad indentation of a sequence entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'sequence';\n    state.result = _result;\n    return true;\n  }\n  return false;\n}\n\nfunction readBlockMapping(state, nodeIndent, flowIndent) {\n  var following,\n      allowCompact,\n      _line,\n      _tag          = state.tag,\n      _anchor       = state.anchor,\n      _result       = {},\n      keyTag        = null,\n      keyNode       = null,\n      valueNode     = null,\n      atExplicitKey = false,\n      detected      = false,\n      ch;\n\n  if (null !== state.anchor) {\n    state.anchorMap[state.anchor] = _result;\n  }\n\n  ch = state.input.charCodeAt(state.position);\n\n  while (0 !== ch) {\n    following = state.input.charCodeAt(state.position + 1);\n    _line = state.line; // Save the current line.\n\n    //\n    // Explicit notation case. There are two separate blocks:\n    // first for the key (denoted by \"?\") and second for the value (denoted by \":\")\n    //\n    if ((0x3F/* ? */ === ch || 0x3A/* : */  === ch) && is_WS_OR_EOL(following)) {\n\n      if (0x3F/* ? */ === ch) {\n        if (atExplicitKey) {\n          storeMappingPair(state, _result, keyTag, keyNode, null);\n          keyTag = keyNode = valueNode = null;\n        }\n\n        detected = true;\n        atExplicitKey = true;\n        allowCompact = true;\n\n      } else if (atExplicitKey) {\n        // i.e. 0x3A/* : */ === character after the explicit key.\n        atExplicitKey = false;\n        allowCompact = true;\n\n      } else {\n        throwError(state, 'incomplete explicit mapping pair; a key node is missed');\n      }\n\n      state.position += 1;\n      ch = following;\n\n    //\n    // Implicit notation case. Flow-style node as the key first, then \":\", and the value.\n    //\n    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {\n\n      if (state.line === _line) {\n        ch = state.input.charCodeAt(state.position);\n\n        while (is_WHITE_SPACE(ch)) {\n          ch = state.input.charCodeAt(++state.position);\n        }\n\n        if (0x3A/* : */ === ch) {\n          ch = state.input.charCodeAt(++state.position);\n\n          if (!is_WS_OR_EOL(ch)) {\n            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');\n          }\n\n          if (atExplicitKey) {\n            storeMappingPair(state, _result, keyTag, keyNode, null);\n            keyTag = keyNode = valueNode = null;\n          }\n\n          detected = true;\n          atExplicitKey = false;\n          allowCompact = false;\n          keyTag = state.tag;\n          keyNode = state.result;\n\n        } else if (detected) {\n          throwError(state, 'can not read an implicit mapping pair; a colon is missed');\n\n        } else {\n          state.tag = _tag;\n          state.anchor = _anchor;\n          return true; // Keep the result of `composeNode`.\n        }\n\n      } else if (detected) {\n        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');\n\n      } else {\n        state.tag = _tag;\n        state.anchor = _anchor;\n        return true; // Keep the result of `composeNode`.\n      }\n\n    } else {\n      break; // Reading is done. Go to the epilogue.\n    }\n\n    //\n    // Common reading code for both explicit and implicit notations.\n    //\n    if (state.line === _line || state.lineIndent > nodeIndent) {\n      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {\n        if (atExplicitKey) {\n          keyNode = state.result;\n        } else {\n          valueNode = state.result;\n        }\n      }\n\n      if (!atExplicitKey) {\n        storeMappingPair(state, _result, keyTag, keyNode, valueNode);\n        keyTag = keyNode = valueNode = null;\n      }\n\n      skipSeparationSpace(state, true, -1);\n      ch = state.input.charCodeAt(state.position);\n    }\n\n    if (state.lineIndent > nodeIndent && (0 !== ch)) {\n      throwError(state, 'bad indentation of a mapping entry');\n    } else if (state.lineIndent < nodeIndent) {\n      break;\n    }\n  }\n\n  //\n  // Epilogue.\n  //\n\n  // Special case: last mapping's node contains only the key in explicit notation.\n  if (atExplicitKey) {\n    storeMappingPair(state, _result, keyTag, keyNode, null);\n  }\n\n  // Expose the resulting mapping.\n  if (detected) {\n    state.tag = _tag;\n    state.anchor = _anchor;\n    state.kind = 'mapping';\n    state.result = _result;\n  }\n\n  return detected;\n}\n\nfunction readTagProperty(state) {\n  var _position,\n      isVerbatim = false,\n      isNamed    = false,\n      tagHandle,\n      tagName,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x21/* ! */ !== ch) {\n    return false;\n  }\n\n  if (null !== state.tag) {\n    throwError(state, 'duplication of a tag property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n\n  if (0x3C/* < */ === ch) {\n    isVerbatim = true;\n    ch = state.input.charCodeAt(++state.position);\n\n  } else if (0x21/* ! */ === ch) {\n    isNamed = true;\n    tagHandle = '!!';\n    ch = state.input.charCodeAt(++state.position);\n\n  } else {\n    tagHandle = '!';\n  }\n\n  _position = state.position;\n\n  if (isVerbatim) {\n    do { ch = state.input.charCodeAt(++state.position); }\n    while (0 !== ch && 0x3E/* > */ !== ch);\n\n    if (state.position < state.length) {\n      tagName = state.input.slice(_position, state.position);\n      ch = state.input.charCodeAt(++state.position);\n    } else {\n      throwError(state, 'unexpected end of the stream within a verbatim tag');\n    }\n  } else {\n    while (0 !== ch && !is_WS_OR_EOL(ch)) {\n\n      if (0x21/* ! */ === ch) {\n        if (!isNamed) {\n          tagHandle = state.input.slice(_position - 1, state.position + 1);\n\n          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {\n            throwError(state, 'named tag handle cannot contain such characters');\n          }\n\n          isNamed = true;\n          _position = state.position + 1;\n        } else {\n          throwError(state, 'tag suffix cannot contain exclamation marks');\n        }\n      }\n\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    tagName = state.input.slice(_position, state.position);\n\n    if (PATTERN_FLOW_INDICATORS.test(tagName)) {\n      throwError(state, 'tag suffix cannot contain flow indicator characters');\n    }\n  }\n\n  if (tagName && !PATTERN_TAG_URI.test(tagName)) {\n    throwError(state, 'tag name cannot contain such characters: ' + tagName);\n  }\n\n  if (isVerbatim) {\n    state.tag = tagName;\n\n  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {\n    state.tag = state.tagMap[tagHandle] + tagName;\n\n  } else if ('!' === tagHandle) {\n    state.tag = '!' + tagName;\n\n  } else if ('!!' === tagHandle) {\n    state.tag = 'tag:yaml.org,2002:' + tagName;\n\n  } else {\n    throwError(state, 'undeclared tag handle \"' + tagHandle + '\"');\n  }\n\n  return true;\n}\n\nfunction readAnchorProperty(state) {\n  var _position,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x26/* & */ !== ch) {\n    return false;\n  }\n\n  if (null !== state.anchor) {\n    throwError(state, 'duplication of an anchor property');\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (0 !== ch && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an anchor node must contain at least one character');\n  }\n\n  state.anchor = state.input.slice(_position, state.position);\n  return true;\n}\n\nfunction readAlias(state) {\n  var _position, alias,\n      ch;\n\n  ch = state.input.charCodeAt(state.position);\n\n  if (0x2A/* * */ !== ch) {\n    return false;\n  }\n\n  ch = state.input.charCodeAt(++state.position);\n  _position = state.position;\n\n  while (0 !== ch && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {\n    ch = state.input.charCodeAt(++state.position);\n  }\n\n  if (state.position === _position) {\n    throwError(state, 'name of an alias node must contain at least one character');\n  }\n\n  alias = state.input.slice(_position, state.position);\n\n  if (!state.anchorMap.hasOwnProperty(alias)) {\n    throwError(state, 'unidentified alias \"' + alias + '\"');\n  }\n\n  state.result = state.anchorMap[alias];\n  skipSeparationSpace(state, true, -1);\n  return true;\n}\n\nfunction composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {\n  var allowBlockStyles,\n      allowBlockScalars,\n      allowBlockCollections,\n      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent\n      atNewLine  = false,\n      hasContent = false,\n      typeIndex,\n      typeQuantity,\n      type,\n      flowIndent,\n      blockIndent;\n\n  state.tag    = null;\n  state.anchor = null;\n  state.kind   = null;\n  state.result = null;\n\n  allowBlockStyles = allowBlockScalars = allowBlockCollections =\n    CONTEXT_BLOCK_OUT === nodeContext ||\n    CONTEXT_BLOCK_IN  === nodeContext;\n\n  if (allowToSeek) {\n    if (skipSeparationSpace(state, true, -1)) {\n      atNewLine = true;\n\n      if (state.lineIndent > parentIndent) {\n        indentStatus = 1;\n      } else if (state.lineIndent === parentIndent) {\n        indentStatus = 0;\n      } else if (state.lineIndent < parentIndent) {\n        indentStatus = -1;\n      }\n    }\n  }\n\n  if (1 === indentStatus) {\n    while (readTagProperty(state) || readAnchorProperty(state)) {\n      if (skipSeparationSpace(state, true, -1)) {\n        atNewLine = true;\n        allowBlockCollections = allowBlockStyles;\n\n        if (state.lineIndent > parentIndent) {\n          indentStatus = 1;\n        } else if (state.lineIndent === parentIndent) {\n          indentStatus = 0;\n        } else if (state.lineIndent < parentIndent) {\n          indentStatus = -1;\n        }\n      } else {\n        allowBlockCollections = false;\n      }\n    }\n  }\n\n  if (allowBlockCollections) {\n    allowBlockCollections = atNewLine || allowCompact;\n  }\n\n  if (1 === indentStatus || CONTEXT_BLOCK_OUT === nodeContext) {\n    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {\n      flowIndent = parentIndent;\n    } else {\n      flowIndent = parentIndent + 1;\n    }\n\n    blockIndent = state.position - state.lineStart;\n\n    if (1 === indentStatus) {\n      if (allowBlockCollections &&\n          (readBlockSequence(state, blockIndent) ||\n           readBlockMapping(state, blockIndent, flowIndent)) ||\n          readFlowCollection(state, flowIndent)) {\n        hasContent = true;\n      } else {\n        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||\n            readSingleQuotedScalar(state, flowIndent) ||\n            readDoubleQuotedScalar(state, flowIndent)) {\n          hasContent = true;\n\n        } else if (readAlias(state)) {\n          hasContent = true;\n\n          if (null !== state.tag || null !== state.anchor) {\n            throwError(state, 'alias node should not have any properties');\n          }\n\n        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {\n          hasContent = true;\n\n          if (null === state.tag) {\n            state.tag = '?';\n          }\n        }\n\n        if (null !== state.anchor) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else if (0 === indentStatus) {\n      // Special case: block sequences are allowed to have same indentation level as the parent.\n      // http://www.yaml.org/spec/1.2/spec.html#id2799784\n      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);\n    }\n  }\n\n  if (null !== state.tag && '!' !== state.tag) {\n    if ('?' === state.tag) {\n      for (typeIndex = 0, typeQuantity = state.implicitTypes.length;\n           typeIndex < typeQuantity;\n           typeIndex += 1) {\n        type = state.implicitTypes[typeIndex];\n\n        // Implicit resolving is not allowed for non-scalar types, and '?'\n        // non-specific tag is only assigned to plain scalars. So, it isn't\n        // needed to check for 'kind' conformity.\n\n        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched\n          state.result = type.construct(state.result);\n          state.tag = type.tag;\n          if (null !== state.anchor) {\n            state.anchorMap[state.anchor] = state.result;\n          }\n          break;\n        }\n      }\n    } else if (_hasOwnProperty.call(state.typeMap, state.tag)) {\n      type = state.typeMap[state.tag];\n\n      if (null !== state.result && type.kind !== state.kind) {\n        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be \"' + type.kind + '\", not \"' + state.kind + '\"');\n      }\n\n      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched\n        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');\n      } else {\n        state.result = type.construct(state.result);\n        if (null !== state.anchor) {\n          state.anchorMap[state.anchor] = state.result;\n        }\n      }\n    } else {\n      throwError(state, 'unknown tag !<' + state.tag + '>');\n    }\n  }\n\n  return null !== state.tag || null !== state.anchor || hasContent;\n}\n\nfunction readDocument(state) {\n  var documentStart = state.position,\n      _position,\n      directiveName,\n      directiveArgs,\n      hasDirectives = false,\n      ch;\n\n  state.version = null;\n  state.checkLineBreaks = state.legacy;\n  state.tagMap = {};\n  state.anchorMap = {};\n\n  while (0 !== (ch = state.input.charCodeAt(state.position))) {\n    skipSeparationSpace(state, true, -1);\n\n    ch = state.input.charCodeAt(state.position);\n\n    if (state.lineIndent > 0 || 0x25/* % */ !== ch) {\n      break;\n    }\n\n    hasDirectives = true;\n    ch = state.input.charCodeAt(++state.position);\n    _position = state.position;\n\n    while (0 !== ch && !is_WS_OR_EOL(ch)) {\n      ch = state.input.charCodeAt(++state.position);\n    }\n\n    directiveName = state.input.slice(_position, state.position);\n    directiveArgs = [];\n\n    if (directiveName.length < 1) {\n      throwError(state, 'directive name must not be less than one character in length');\n    }\n\n    while (0 !== ch) {\n      while (is_WHITE_SPACE(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      if (0x23/* # */ === ch) {\n        do { ch = state.input.charCodeAt(++state.position); }\n        while (0 !== ch && !is_EOL(ch));\n        break;\n      }\n\n      if (is_EOL(ch)) {\n        break;\n      }\n\n      _position = state.position;\n\n      while (0 !== ch && !is_WS_OR_EOL(ch)) {\n        ch = state.input.charCodeAt(++state.position);\n      }\n\n      directiveArgs.push(state.input.slice(_position, state.position));\n    }\n\n    if (0 !== ch) {\n      readLineBreak(state);\n    }\n\n    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {\n      directiveHandlers[directiveName](state, directiveName, directiveArgs);\n    } else {\n      throwWarning(state, 'unknown document directive \"' + directiveName + '\"');\n    }\n  }\n\n  skipSeparationSpace(state, true, -1);\n\n  if (0 === state.lineIndent &&\n      0x2D/* - */ === state.input.charCodeAt(state.position) &&\n      0x2D/* - */ === state.input.charCodeAt(state.position + 1) &&\n      0x2D/* - */ === state.input.charCodeAt(state.position + 2)) {\n    state.position += 3;\n    skipSeparationSpace(state, true, -1);\n\n  } else if (hasDirectives) {\n    throwError(state, 'directives end mark is expected');\n  }\n\n  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);\n  skipSeparationSpace(state, true, -1);\n\n  if (state.checkLineBreaks &&\n      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {\n    throwWarning(state, 'non-ASCII line breaks are interpreted as content');\n  }\n\n  state.documents.push(state.result);\n\n  if (state.position === state.lineStart && testDocumentSeparator(state)) {\n\n    if (0x2E/* . */ === state.input.charCodeAt(state.position)) {\n      state.position += 3;\n      skipSeparationSpace(state, true, -1);\n    }\n    return;\n  }\n\n  if (state.position < (state.length - 1)) {\n    throwError(state, 'end of the stream or a document separator is expected');\n  } else {\n    return;\n  }\n}\n\n\nfunction loadDocuments(input, options) {\n  input = String(input);\n  options = options || {};\n\n  if (input.length !== 0) {\n\n    // Add tailing `\\n` if not exists\n    if (0x0A/* LF */ !== input.charCodeAt(input.length - 1) &&\n        0x0D/* CR */ !== input.charCodeAt(input.length - 1)) {\n      input += '\\n';\n    }\n\n    // Strip BOM\n    if (input.charCodeAt(0) === 0xFEFF) {\n      input = input.slice(1);\n    }\n  }\n\n  var state = new State(input, options);\n\n  // Use 0 as string terminator. That significantly simplifies bounds check.\n  state.input += '\\0';\n\n  while (0x20/* Space */ === state.input.charCodeAt(state.position)) {\n    state.lineIndent += 1;\n    state.position += 1;\n  }\n\n  while (state.position < (state.length - 1)) {\n    readDocument(state);\n  }\n\n  return state.documents;\n}\n\n\nfunction loadAll(input, iterator, options) {\n  var documents = loadDocuments(input, options), index, length;\n\n  for (index = 0, length = documents.length; index < length; index += 1) {\n    iterator(documents[index]);\n  }\n}\n\n\nfunction load(input, options) {\n  var documents = loadDocuments(input, options);\n\n  if (0 === documents.length) {\n    /*eslint-disable no-undefined*/\n    return undefined;\n  } else if (1 === documents.length) {\n    return documents[0];\n  }\n  throw new YAMLException('expected a single document in the stream, but found more');\n}\n\n\nfunction safeLoadAll(input, output, options) {\n  loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nfunction safeLoad(input, options) {\n  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));\n}\n\n\nmodule.exports.loadAll     = loadAll;\nmodule.exports.load        = load;\nmodule.exports.safeLoadAll = safeLoadAll;\nmodule.exports.safeLoad    = safeLoad;\n",
     "'use strict';\n\n\nvar common = require('./common');\n\n\nfunction Mark(name, buffer, position, line, column) {\n  this.name     = name;\n  this.buffer   = buffer;\n  this.position = position;\n  this.line     = line;\n  this.column   = column;\n}\n\n\nMark.prototype.getSnippet = function getSnippet(indent, maxLength) {\n  var head, start, tail, end, snippet;\n\n  if (!this.buffer) {\n    return null;\n  }\n\n  indent = indent || 4;\n  maxLength = maxLength || 75;\n\n  head = '';\n  start = this.position;\n\n  while (start > 0 && -1 === '\\x00\\r\\n\\x85\\u2028\\u2029'.indexOf(this.buffer.charAt(start - 1))) {\n    start -= 1;\n    if (this.position - start > (maxLength / 2 - 1)) {\n      head = ' ... ';\n      start += 5;\n      break;\n    }\n  }\n\n  tail = '';\n  end = this.position;\n\n  while (end < this.buffer.length && -1 === '\\x00\\r\\n\\x85\\u2028\\u2029'.indexOf(this.buffer.charAt(end))) {\n    end += 1;\n    if (end - this.position > (maxLength / 2 - 1)) {\n      tail = ' ... ';\n      end -= 5;\n      break;\n    }\n  }\n\n  snippet = this.buffer.slice(start, end);\n\n  return common.repeat(' ', indent) + head + snippet + tail + '\\n' +\n         common.repeat(' ', indent + this.position - start + head.length) + '^';\n};\n\n\nMark.prototype.toString = function toString(compact) {\n  var snippet, where = '';\n\n  if (this.name) {\n    where += 'in \"' + this.name + '\" ';\n  }\n\n  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);\n\n  if (!compact) {\n    snippet = this.getSnippet();\n\n    if (snippet) {\n      where += ':\\n' + snippet;\n    }\n  }\n\n  return where;\n};\n\n\nmodule.exports = Mark;\n",
     "'use strict';\n\n/*eslint-disable max-len*/\n\nvar common        = require('./common');\nvar YAMLException = require('./exception');\nvar Type          = require('./type');\n\n\nfunction compileList(schema, name, result) {\n  var exclude = [];\n\n  schema.include.forEach(function (includedSchema) {\n    result = compileList(includedSchema, name, result);\n  });\n\n  schema[name].forEach(function (currentType) {\n    result.forEach(function (previousType, previousIndex) {\n      if (previousType.tag === currentType.tag) {\n        exclude.push(previousIndex);\n      }\n    });\n\n    result.push(currentType);\n  });\n\n  return result.filter(function (type, index) {\n    return -1 === exclude.indexOf(index);\n  });\n}\n\n\nfunction compileMap(/* lists... */) {\n  var result = {}, index, length;\n\n  function collectType(type) {\n    result[type.tag] = type;\n  }\n\n  for (index = 0, length = arguments.length; index < length; index += 1) {\n    arguments[index].forEach(collectType);\n  }\n\n  return result;\n}\n\n\nfunction Schema(definition) {\n  this.include  = definition.include  || [];\n  this.implicit = definition.implicit || [];\n  this.explicit = definition.explicit || [];\n\n  this.implicit.forEach(function (type) {\n    if (type.loadKind && 'scalar' !== type.loadKind) {\n      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');\n    }\n  });\n\n  this.compiledImplicit = compileList(this, 'implicit', []);\n  this.compiledExplicit = compileList(this, 'explicit', []);\n  this.compiledTypeMap  = compileMap(this.compiledImplicit, this.compiledExplicit);\n}\n\n\nSchema.DEFAULT = null;\n\n\nSchema.create = function createSchema() {\n  var schemas, types;\n\n  switch (arguments.length) {\n  case 1:\n    schemas = Schema.DEFAULT;\n    types = arguments[0];\n    break;\n\n  case 2:\n    schemas = arguments[0];\n    types = arguments[1];\n    break;\n\n  default:\n    throw new YAMLException('Wrong number of arguments for Schema.create function');\n  }\n\n  schemas = common.toArray(schemas);\n  types = common.toArray(types);\n\n  if (!schemas.every(function (schema) { return schema instanceof Schema; })) {\n    throw new YAMLException('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');\n  }\n\n  if (!types.every(function (type) { return type instanceof Type; })) {\n    throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');\n  }\n\n  return new Schema({\n    include: schemas,\n    explicit: types\n  });\n};\n\n\nmodule.exports = Schema;\n",
     "// Standard YAML's Core schema.\n// http://www.yaml.org/spec/1.2/spec.html#id2804923\n//\n// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.\n// So, Core schema has no distinctions from JSON schema is JS-YAML.\n\n\n'use strict';\n\n\nvar Schema = require('../schema');\n\n\nmodule.exports = new Schema({\n  include: [\n    require('./json')\n  ]\n});\n",
@@ -152,7 +151,7 @@
     "'use strict';\n\nvar YAMLException = require('./exception');\n\nvar TYPE_CONSTRUCTOR_OPTIONS = [\n  'kind',\n  'resolve',\n  'construct',\n  'instanceOf',\n  'predicate',\n  'represent',\n  'defaultStyle',\n  'styleAliases'\n];\n\nvar YAML_NODE_KINDS = [\n  'scalar',\n  'sequence',\n  'mapping'\n];\n\nfunction compileStyleAliases(map) {\n  var result = {};\n\n  if (null !== map) {\n    Object.keys(map).forEach(function (style) {\n      map[style].forEach(function (alias) {\n        result[String(alias)] = style;\n      });\n    });\n  }\n\n  return result;\n}\n\nfunction Type(tag, options) {\n  options = options || {};\n\n  Object.keys(options).forEach(function (name) {\n    if (-1 === TYPE_CONSTRUCTOR_OPTIONS.indexOf(name)) {\n      throw new YAMLException('Unknown option \"' + name + '\" is met in definition of \"' + tag + '\" YAML type.');\n    }\n  });\n\n  // TODO: Add tag format check.\n  this.tag          = tag;\n  this.kind         = options['kind']         || null;\n  this.resolve      = options['resolve']      || function () { return true; };\n  this.construct    = options['construct']    || function (data) { return data; };\n  this.instanceOf   = options['instanceOf']   || null;\n  this.predicate    = options['predicate']    || null;\n  this.represent    = options['represent']    || null;\n  this.defaultStyle = options['defaultStyle'] || null;\n  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);\n\n  if (-1 === YAML_NODE_KINDS.indexOf(this.kind)) {\n    throw new YAMLException('Unknown kind \"' + this.kind + '\" is specified for \"' + tag + '\" YAML type.');\n  }\n}\n\nmodule.exports = Type;\n",
     "'use strict';\n\n/*eslint-disable no-bitwise*/\n\n// A trick for browserified version.\n// Since we make browserifier to ignore `buffer` module, NodeBuffer will be undefined\nvar NodeBuffer = require('buffer').Buffer;\nvar Type       = require('../type');\n\n\n// [ 64, 65, 66 ] -> [ padding, CR, LF ]\nvar BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\\n\\r';\n\n\nfunction resolveYamlBinary(data) {\n  if (null === data) {\n    return false;\n  }\n\n  var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;\n\n  // Convert one by one.\n  for (idx = 0; idx < max; idx++) {\n    code = map.indexOf(data.charAt(idx));\n\n    // Skip CR/LF\n    if (code > 64) { continue; }\n\n    // Fail on illegal characters\n    if (code < 0) { return false; }\n\n    bitlen += 6;\n  }\n\n  // If there are any bits left, source was corrupted\n  return (bitlen % 8) === 0;\n}\n\nfunction constructYamlBinary(data) {\n  var idx, tailbits,\n      input = data.replace(/[\\r\\n=]/g, ''), // remove CR/LF & padding to simplify scan\n      max = input.length,\n      map = BASE64_MAP,\n      bits = 0,\n      result = [];\n\n  // Collect by 6*4 bits (3 bytes)\n\n  for (idx = 0; idx < max; idx++) {\n    if ((idx % 4 === 0) && idx) {\n      result.push((bits >> 16) & 0xFF);\n      result.push((bits >> 8) & 0xFF);\n      result.push(bits & 0xFF);\n    }\n\n    bits = (bits << 6) | map.indexOf(input.charAt(idx));\n  }\n\n  // Dump tail\n\n  tailbits = (max % 4) * 6;\n\n  if (tailbits === 0) {\n    result.push((bits >> 16) & 0xFF);\n    result.push((bits >> 8) & 0xFF);\n    result.push(bits & 0xFF);\n  } else if (tailbits === 18) {\n    result.push((bits >> 10) & 0xFF);\n    result.push((bits >> 2) & 0xFF);\n  } else if (tailbits === 12) {\n    result.push((bits >> 4) & 0xFF);\n  }\n\n  // Wrap into Buffer for NodeJS and leave Array for browser\n  if (NodeBuffer) {\n    return new NodeBuffer(result);\n  }\n\n  return result;\n}\n\nfunction representYamlBinary(object /*, style*/) {\n  var result = '', bits = 0, idx, tail,\n      max = object.length,\n      map = BASE64_MAP;\n\n  // Convert every three bytes to 4 ASCII characters.\n\n  for (idx = 0; idx < max; idx++) {\n    if ((idx % 3 === 0) && idx) {\n      result += map[(bits >> 18) & 0x3F];\n      result += map[(bits >> 12) & 0x3F];\n      result += map[(bits >> 6) & 0x3F];\n      result += map[bits & 0x3F];\n    }\n\n    bits = (bits << 8) + object[idx];\n  }\n\n  // Dump tail\n\n  tail = max % 3;\n\n  if (tail === 0) {\n    result += map[(bits >> 18) & 0x3F];\n    result += map[(bits >> 12) & 0x3F];\n    result += map[(bits >> 6) & 0x3F];\n    result += map[bits & 0x3F];\n  } else if (tail === 2) {\n    result += map[(bits >> 10) & 0x3F];\n    result += map[(bits >> 4) & 0x3F];\n    result += map[(bits << 2) & 0x3F];\n    result += map[64];\n  } else if (tail === 1) {\n    result += map[(bits >> 2) & 0x3F];\n    result += map[(bits << 4) & 0x3F];\n    result += map[64];\n    result += map[64];\n  }\n\n  return result;\n}\n\nfunction isBinary(object) {\n  return NodeBuffer && NodeBuffer.isBuffer(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:binary', {\n  kind: 'scalar',\n  resolve: resolveYamlBinary,\n  construct: constructYamlBinary,\n  predicate: isBinary,\n  represent: representYamlBinary\n});\n",
     "'use strict';\n\nvar Type = require('../type');\n\nfunction resolveYamlBoolean(data) {\n  if (null === data) {\n    return false;\n  }\n\n  var max = data.length;\n\n  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||\n         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));\n}\n\nfunction constructYamlBoolean(data) {\n  return data === 'true' ||\n         data === 'True' ||\n         data === 'TRUE';\n}\n\nfunction isBoolean(object) {\n  return '[object Boolean]' === Object.prototype.toString.call(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:bool', {\n  kind: 'scalar',\n  resolve: resolveYamlBoolean,\n  construct: constructYamlBoolean,\n  predicate: isBoolean,\n  represent: {\n    lowercase: function (object) { return object ? 'true' : 'false'; },\n    uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },\n    camelcase: function (object) { return object ? 'True' : 'False'; }\n  },\n  defaultStyle: 'lowercase'\n});\n",
-    "'use strict';\n\nvar common = require('../common');\nvar Type   = require('../type');\n\nvar YAML_FLOAT_PATTERN = new RegExp(\n  '^(?:[-+]?(?:[0-9][0-9_]*)\\\\.[0-9_]*(?:[eE][-+][0-9]+)?' +\n  '|\\\\.[0-9_]+(?:[eE][-+][0-9]+)?' +\n  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\\\.[0-9_]*' +\n  '|[-+]?\\\\.(?:inf|Inf|INF)' +\n  '|\\\\.(?:nan|NaN|NAN))$');\n\nfunction resolveYamlFloat(data) {\n  if (null === data) {\n    return false;\n  }\n\n  if (!YAML_FLOAT_PATTERN.test(data)) {\n    return false;\n  }\n  return true;\n}\n\nfunction constructYamlFloat(data) {\n  var value, sign, base, digits;\n\n  value  = data.replace(/_/g, '').toLowerCase();\n  sign   = '-' === value[0] ? -1 : 1;\n  digits = [];\n\n  if (0 <= '+-'.indexOf(value[0])) {\n    value = value.slice(1);\n  }\n\n  if ('.inf' === value) {\n    return (1 === sign) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;\n\n  } else if ('.nan' === value) {\n    return NaN;\n\n  } else if (0 <= value.indexOf(':')) {\n    value.split(':').forEach(function (v) {\n      digits.unshift(parseFloat(v, 10));\n    });\n\n    value = 0.0;\n    base = 1;\n\n    digits.forEach(function (d) {\n      value += d * base;\n      base *= 60;\n    });\n\n    return sign * value;\n\n  }\n  return sign * parseFloat(value, 10);\n}\n\nfunction representYamlFloat(object, style) {\n  if (isNaN(object)) {\n    switch (style) {\n    case 'lowercase':\n      return '.nan';\n    case 'uppercase':\n      return '.NAN';\n    case 'camelcase':\n      return '.NaN';\n    }\n  } else if (Number.POSITIVE_INFINITY === object) {\n    switch (style) {\n    case 'lowercase':\n      return '.inf';\n    case 'uppercase':\n      return '.INF';\n    case 'camelcase':\n      return '.Inf';\n    }\n  } else if (Number.NEGATIVE_INFINITY === object) {\n    switch (style) {\n    case 'lowercase':\n      return '-.inf';\n    case 'uppercase':\n      return '-.INF';\n    case 'camelcase':\n      return '-.Inf';\n    }\n  } else if (common.isNegativeZero(object)) {\n    return '-0.0';\n  }\n  return object.toString(10);\n}\n\nfunction isFloat(object) {\n  return ('[object Number]' === Object.prototype.toString.call(object)) &&\n         (0 !== object % 1 || common.isNegativeZero(object));\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:float', {\n  kind: 'scalar',\n  resolve: resolveYamlFloat,\n  construct: constructYamlFloat,\n  predicate: isFloat,\n  represent: representYamlFloat,\n  defaultStyle: 'lowercase'\n});\n",
+    "'use strict';\n\nvar common = require('../common');\nvar Type   = require('../type');\n\nvar YAML_FLOAT_PATTERN = new RegExp(\n  '^(?:[-+]?(?:[0-9][0-9_]*)\\\\.[0-9_]*(?:[eE][-+][0-9]+)?' +\n  '|\\\\.[0-9_]+(?:[eE][-+][0-9]+)?' +\n  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\\\.[0-9_]*' +\n  '|[-+]?\\\\.(?:inf|Inf|INF)' +\n  '|\\\\.(?:nan|NaN|NAN))$');\n\nfunction resolveYamlFloat(data) {\n  if (null === data) {\n    return false;\n  }\n\n  if (!YAML_FLOAT_PATTERN.test(data)) {\n    return false;\n  }\n  return true;\n}\n\nfunction constructYamlFloat(data) {\n  var value, sign, base, digits;\n\n  value  = data.replace(/_/g, '').toLowerCase();\n  sign   = '-' === value[0] ? -1 : 1;\n  digits = [];\n\n  if (0 <= '+-'.indexOf(value[0])) {\n    value = value.slice(1);\n  }\n\n  if ('.inf' === value) {\n    return (1 === sign) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;\n\n  } else if ('.nan' === value) {\n    return NaN;\n\n  } else if (0 <= value.indexOf(':')) {\n    value.split(':').forEach(function (v) {\n      digits.unshift(parseFloat(v, 10));\n    });\n\n    value = 0.0;\n    base = 1;\n\n    digits.forEach(function (d) {\n      value += d * base;\n      base *= 60;\n    });\n\n    return sign * value;\n\n  }\n  return sign * parseFloat(value, 10);\n}\n\n\nvar SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;\n\nfunction representYamlFloat(object, style) {\n  var res;\n\n  if (isNaN(object)) {\n    switch (style) {\n    case 'lowercase':\n      return '.nan';\n    case 'uppercase':\n      return '.NAN';\n    case 'camelcase':\n      return '.NaN';\n    }\n  } else if (Number.POSITIVE_INFINITY === object) {\n    switch (style) {\n    case 'lowercase':\n      return '.inf';\n    case 'uppercase':\n      return '.INF';\n    case 'camelcase':\n      return '.Inf';\n    }\n  } else if (Number.NEGATIVE_INFINITY === object) {\n    switch (style) {\n    case 'lowercase':\n      return '-.inf';\n    case 'uppercase':\n      return '-.INF';\n    case 'camelcase':\n      return '-.Inf';\n    }\n  } else if (common.isNegativeZero(object)) {\n    return '-0.0';\n  }\n\n  res = object.toString(10);\n\n  // JS stringifier can build scientific format without dots: 5e-100,\n  // while YAML requres dot: 5.e-100. Fix it with simple hack\n\n  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;\n}\n\nfunction isFloat(object) {\n  return ('[object Number]' === Object.prototype.toString.call(object)) &&\n         (0 !== object % 1 || common.isNegativeZero(object));\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:float', {\n  kind: 'scalar',\n  resolve: resolveYamlFloat,\n  construct: constructYamlFloat,\n  predicate: isFloat,\n  represent: representYamlFloat,\n  defaultStyle: 'lowercase'\n});\n",
     "'use strict';\n\nvar common = require('../common');\nvar Type   = require('../type');\n\nfunction isHexCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||\n         ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||\n         ((0x61/* a */ <= c) && (c <= 0x66/* f */));\n}\n\nfunction isOctCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));\n}\n\nfunction isDecCode(c) {\n  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));\n}\n\nfunction resolveYamlInteger(data) {\n  if (null === data) {\n    return false;\n  }\n\n  var max = data.length,\n      index = 0,\n      hasDigits = false,\n      ch;\n\n  if (!max) { return false; }\n\n  ch = data[index];\n\n  // sign\n  if (ch === '-' || ch === '+') {\n    ch = data[++index];\n  }\n\n  if (ch === '0') {\n    // 0\n    if (index + 1 === max) { return true; }\n    ch = data[++index];\n\n    // base 2, base 8, base 16\n\n    if (ch === 'b') {\n      // base 2\n      index++;\n\n      for (; index < max; index++) {\n        ch = data[index];\n        if (ch === '_') { continue; }\n        if (ch !== '0' && ch !== '1') {\n          return false;\n        }\n        hasDigits = true;\n      }\n      return hasDigits;\n    }\n\n\n    if (ch === 'x') {\n      // base 16\n      index++;\n\n      for (; index < max; index++) {\n        ch = data[index];\n        if (ch === '_') { continue; }\n        if (!isHexCode(data.charCodeAt(index))) {\n          return false;\n        }\n        hasDigits = true;\n      }\n      return hasDigits;\n    }\n\n    // base 8\n    for (; index < max; index++) {\n      ch = data[index];\n      if (ch === '_') { continue; }\n      if (!isOctCode(data.charCodeAt(index))) {\n        return false;\n      }\n      hasDigits = true;\n    }\n    return hasDigits;\n  }\n\n  // base 10 (except 0) or base 60\n\n  for (; index < max; index++) {\n    ch = data[index];\n    if (ch === '_') { continue; }\n    if (ch === ':') { break; }\n    if (!isDecCode(data.charCodeAt(index))) {\n      return false;\n    }\n    hasDigits = true;\n  }\n\n  if (!hasDigits) { return false; }\n\n  // if !base60 - done;\n  if (ch !== ':') { return true; }\n\n  // base60 almost not used, no needs to optimize\n  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));\n}\n\nfunction constructYamlInteger(data) {\n  var value = data, sign = 1, ch, base, digits = [];\n\n  if (value.indexOf('_') !== -1) {\n    value = value.replace(/_/g, '');\n  }\n\n  ch = value[0];\n\n  if (ch === '-' || ch === '+') {\n    if (ch === '-') { sign = -1; }\n    value = value.slice(1);\n    ch = value[0];\n  }\n\n  if ('0' === value) {\n    return 0;\n  }\n\n  if (ch === '0') {\n    if (value[1] === 'b') {\n      return sign * parseInt(value.slice(2), 2);\n    }\n    if (value[1] === 'x') {\n      return sign * parseInt(value, 16);\n    }\n    return sign * parseInt(value, 8);\n\n  }\n\n  if (value.indexOf(':') !== -1) {\n    value.split(':').forEach(function (v) {\n      digits.unshift(parseInt(v, 10));\n    });\n\n    value = 0;\n    base = 1;\n\n    digits.forEach(function (d) {\n      value += (d * base);\n      base *= 60;\n    });\n\n    return sign * value;\n\n  }\n\n  return sign * parseInt(value, 10);\n}\n\nfunction isInteger(object) {\n  return ('[object Number]' === Object.prototype.toString.call(object)) &&\n         (0 === object % 1 && !common.isNegativeZero(object));\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:int', {\n  kind: 'scalar',\n  resolve: resolveYamlInteger,\n  construct: constructYamlInteger,\n  predicate: isInteger,\n  represent: {\n    binary:      function (object) { return '0b' + object.toString(2); },\n    octal:       function (object) { return '0'  + object.toString(8); },\n    decimal:     function (object) { return        object.toString(10); },\n    hexadecimal: function (object) { return '0x' + object.toString(16).toUpperCase(); }\n  },\n  defaultStyle: 'decimal',\n  styleAliases: {\n    binary:      [ 2,  'bin' ],\n    octal:       [ 8,  'oct' ],\n    decimal:     [ 10, 'dec' ],\n    hexadecimal: [ 16, 'hex' ]\n  }\n});\n",
     "'use strict';\n\nvar esprima;\n\n// Browserified version does not have esprima\n//\n// 1. For node.js just require module as deps\n// 2. For browser try to require mudule via external AMD system.\n//    If not found - try to fallback to window.esprima. If not\n//    found too - then fail to parse.\n//\ntry {\n  esprima = require('esprima');\n} catch (_) {\n  /*global window */\n  if (typeof window !== 'undefined') { esprima = window.esprima; }\n}\n\nvar Type = require('../../type');\n\nfunction resolveJavascriptFunction(data) {\n  if (null === data) {\n    return false;\n  }\n\n  try {\n    var source = '(' + data + ')',\n        ast    = esprima.parse(source, { range: true });\n\n    if ('Program'             !== ast.type         ||\n        1                     !== ast.body.length  ||\n        'ExpressionStatement' !== ast.body[0].type ||\n        'FunctionExpression'  !== ast.body[0].expression.type) {\n      return false;\n    }\n\n    return true;\n  } catch (err) {\n    return false;\n  }\n}\n\nfunction constructJavascriptFunction(data) {\n  /*jslint evil:true*/\n\n  var source = '(' + data + ')',\n      ast    = esprima.parse(source, { range: true }),\n      params = [],\n      body;\n\n  if ('Program'             !== ast.type         ||\n      1                     !== ast.body.length  ||\n      'ExpressionStatement' !== ast.body[0].type ||\n      'FunctionExpression'  !== ast.body[0].expression.type) {\n    throw new Error('Failed to resolve function');\n  }\n\n  ast.body[0].expression.params.forEach(function (param) {\n    params.push(param.name);\n  });\n\n  body = ast.body[0].expression.body.range;\n\n  // Esprima's ranges include the first '{' and the last '}' characters on\n  // function expressions. So cut them out.\n  /*eslint-disable no-new-func*/\n  return new Function(params, source.slice(body[0] + 1, body[1] - 1));\n}\n\nfunction representJavascriptFunction(object /*, style*/) {\n  return object.toString();\n}\n\nfunction isFunction(object) {\n  return '[object Function]' === Object.prototype.toString.call(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:js/function', {\n  kind: 'scalar',\n  resolve: resolveJavascriptFunction,\n  construct: constructJavascriptFunction,\n  predicate: isFunction,\n  represent: representJavascriptFunction\n});\n",
     "'use strict';\n\nvar Type = require('../../type');\n\nfunction resolveJavascriptRegExp(data) {\n  if (null === data) {\n    return false;\n  }\n\n  if (0 === data.length) {\n    return false;\n  }\n\n  var regexp = data,\n      tail   = /\\/([gim]*)$/.exec(data),\n      modifiers = '';\n\n  // if regexp starts with '/' it can have modifiers and must be properly closed\n  // `/foo/gim` - modifiers tail can be maximum 3 chars\n  if ('/' === regexp[0]) {\n    if (tail) {\n      modifiers = tail[1];\n    }\n\n    if (modifiers.length > 3) { return false; }\n    // if expression starts with /, is should be properly terminated\n    if (regexp[regexp.length - modifiers.length - 1] !== '/') { return false; }\n\n    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);\n  }\n\n  try {\n    return true;\n  } catch (error) {\n    return false;\n  }\n}\n\nfunction constructJavascriptRegExp(data) {\n  var regexp = data,\n      tail   = /\\/([gim]*)$/.exec(data),\n      modifiers = '';\n\n  // `/foo/gim` - tail can be maximum 4 chars\n  if ('/' === regexp[0]) {\n    if (tail) {\n      modifiers = tail[1];\n    }\n    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);\n  }\n\n  return new RegExp(regexp, modifiers);\n}\n\nfunction representJavascriptRegExp(object /*, style*/) {\n  var result = '/' + object.source + '/';\n\n  if (object.global) {\n    result += 'g';\n  }\n\n  if (object.multiline) {\n    result += 'm';\n  }\n\n  if (object.ignoreCase) {\n    result += 'i';\n  }\n\n  return result;\n}\n\nfunction isRegExp(object) {\n  return '[object RegExp]' === Object.prototype.toString.call(object);\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:js/regexp', {\n  kind: 'scalar',\n  resolve: resolveJavascriptRegExp,\n  construct: constructJavascriptRegExp,\n  predicate: isRegExp,\n  represent: representJavascriptRegExp\n});\n",
@@ -167,19 +166,19 @@
     "'use strict';\n\nvar Type = require('../type');\n\nmodule.exports = new Type('tag:yaml.org,2002:str', {\n  kind: 'scalar',\n  construct: function (data) { return null !== data ? data : ''; }\n});\n",
     "'use strict';\n\nvar Type = require('../type');\n\nvar YAML_TIMESTAMP_REGEXP = new RegExp(\n  '^([0-9][0-9][0-9][0-9])'          + // [1] year\n  '-([0-9][0-9]?)'                   + // [2] month\n  '-([0-9][0-9]?)'                   + // [3] day\n  '(?:(?:[Tt]|[ \\\\t]+)'              + // ...\n  '([0-9][0-9]?)'                    + // [4] hour\n  ':([0-9][0-9])'                    + // [5] minute\n  ':([0-9][0-9])'                    + // [6] second\n  '(?:\\\\.([0-9]*))?'                 + // [7] fraction\n  '(?:[ \\\\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour\n  '(?::([0-9][0-9]))?))?)?$');         // [11] tz_minute\n\nfunction resolveYamlTimestamp(data) {\n  if (null === data) {\n    return false;\n  }\n\n  if (YAML_TIMESTAMP_REGEXP.exec(data) === null) {\n    return false;\n  }\n\n  return true;\n}\n\nfunction constructYamlTimestamp(data) {\n  var match, year, month, day, hour, minute, second, fraction = 0,\n      delta = null, tz_hour, tz_minute, date;\n\n  match = YAML_TIMESTAMP_REGEXP.exec(data);\n\n  if (null === match) {\n    throw new Error('Date resolve error');\n  }\n\n  // match: [1] year [2] month [3] day\n\n  year = +(match[1]);\n  month = +(match[2]) - 1; // JS month starts with 0\n  day = +(match[3]);\n\n  if (!match[4]) { // no hour\n    return new Date(Date.UTC(year, month, day));\n  }\n\n  // match: [4] hour [5] minute [6] second [7] fraction\n\n  hour = +(match[4]);\n  minute = +(match[5]);\n  second = +(match[6]);\n\n  if (match[7]) {\n    fraction = match[7].slice(0, 3);\n    while (fraction.length < 3) { // milli-seconds\n      fraction += '0';\n    }\n    fraction = +fraction;\n  }\n\n  // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute\n\n  if (match[9]) {\n    tz_hour = +(match[10]);\n    tz_minute = +(match[11] || 0);\n    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds\n    if ('-' === match[9]) {\n      delta = -delta;\n    }\n  }\n\n  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));\n\n  if (delta) {\n    date.setTime(date.getTime() - delta);\n  }\n\n  return date;\n}\n\nfunction representYamlTimestamp(object /*, style*/) {\n  return object.toISOString();\n}\n\nmodule.exports = new Type('tag:yaml.org,2002:timestamp', {\n  kind: 'scalar',\n  resolve: resolveYamlTimestamp,\n  construct: constructYamlTimestamp,\n  instanceOf: Date,\n  represent: representYamlTimestamp\n});\n",
     "/**\n * Helpers.\n */\n\nvar s = 1000;\nvar m = s * 60;\nvar h = m * 60;\nvar d = h * 24;\nvar y = d * 365.25;\n\n/**\n * Parse or format the given `val`.\n *\n * Options:\n *\n *  - `long` verbose formatting [false]\n *\n * @param {String|Number} val\n * @param {Object} options\n * @return {String|Number}\n * @api public\n */\n\nmodule.exports = function(val, options){\n  options = options || {};\n  if ('string' == typeof val) return parse(val);\n  return options.long\n    ? long(val)\n    : short(val);\n};\n\n/**\n * Parse the given `str` and return milliseconds.\n *\n * @param {String} str\n * @return {Number}\n * @api private\n */\n\nfunction parse(str) {\n  str = '' + str;\n  if (str.length > 10000) return;\n  var match = /^((?:\\d+)?\\.?\\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str);\n  if (!match) return;\n  var n = parseFloat(match[1]);\n  var type = (match[2] || 'ms').toLowerCase();\n  switch (type) {\n    case 'years':\n    case 'year':\n    case 'yrs':\n    case 'yr':\n    case 'y':\n      return n * y;\n    case 'days':\n    case 'day':\n    case 'd':\n      return n * d;\n    case 'hours':\n    case 'hour':\n    case 'hrs':\n    case 'hr':\n    case 'h':\n      return n * h;\n    case 'minutes':\n    case 'minute':\n    case 'mins':\n    case 'min':\n    case 'm':\n      return n * m;\n    case 'seconds':\n    case 'second':\n    case 'secs':\n    case 'sec':\n    case 's':\n      return n * s;\n    case 'milliseconds':\n    case 'millisecond':\n    case 'msecs':\n    case 'msec':\n    case 'ms':\n      return n;\n  }\n}\n\n/**\n * Short format for `ms`.\n *\n * @param {Number} ms\n * @return {String}\n * @api private\n */\n\nfunction short(ms) {\n  if (ms >= d) return Math.round(ms / d) + 'd';\n  if (ms >= h) return Math.round(ms / h) + 'h';\n  if (ms >= m) return Math.round(ms / m) + 'm';\n  if (ms >= s) return Math.round(ms / s) + 's';\n  return ms + 'ms';\n}\n\n/**\n * Long format for `ms`.\n *\n * @param {Number} ms\n * @return {String}\n * @api private\n */\n\nfunction long(ms) {\n  return plural(ms, d, 'day')\n    || plural(ms, h, 'hour')\n    || plural(ms, m, 'minute')\n    || plural(ms, s, 'second')\n    || ms + ' ms';\n}\n\n/**\n * Pluralization helper.\n */\n\nfunction plural(ms, n, name) {\n  if (ms < n) return;\n  if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;\n  return Math.ceil(ms / n) + ' ' + name + 's';\n}\n",
-    "/**!\n * Ono v1.0.22\n *\n * @link https://github.com/BigstickCarpet/ono\n * @license MIT\n */\n'use strict';\n\nvar util  = require('util'),\n    slice = Array.prototype.slice;\n\nmodule.exports = create(Error);\nmodule.exports.error = create(Error);\nmodule.exports.eval = create(EvalError);\nmodule.exports.range = create(RangeError);\nmodule.exports.reference = create(ReferenceError);\nmodule.exports.syntax = create(SyntaxError);\nmodule.exports.type = create(TypeError);\nmodule.exports.uri = create(URIError);\nmodule.exports.formatter = util.format;\n\n/**\n * Creates a new {@link ono} function that creates the given Error class.\n *\n * @param {Class} Klass - The Error subclass to create\n * @returns {ono}\n */\nfunction create(Klass) {\n  /**\n   * @param {Error}   [err]     - The original error, if any\n   * @param {object}  [props]   - An object whose properties will be added to the error object\n   * @param {string}  [message] - The error message. May contain {@link util#format} placeholders\n   * @param {...*}    [params]  - Parameters that map to the `message` placeholders\n   * @returns {Error}\n   */\n  return function ono(err, props, message, params) {\n    var formattedMessage, stack;\n    var formatter = module.exports.formatter;\n\n    if (typeof(err) === 'string') {\n      formattedMessage = formatter.apply(null, arguments);\n      err = props = undefined;\n    }\n    else if (typeof(props) === 'string') {\n      formattedMessage = formatter.apply(null, slice.call(arguments, 1));\n    }\n    else {\n      formattedMessage = formatter.apply(null, slice.call(arguments, 2));\n    }\n\n    if (!(err instanceof Error)) {\n      props = err;\n      err = undefined;\n    }\n\n    if (err) {\n      // The inner-error's message and stack will be added to the new error\n      formattedMessage += (formattedMessage ? ' \\n' : '') + err.message;\n      stack = err.stack;\n    }\n\n    var error = new Klass(formattedMessage);\n    extendError(error, stack, props);\n    return error;\n  };\n}\n\n/**\n * Extends the given Error object with the given values\n *\n * @param {Error}   error - The error object to extend\n * @param {?string} stack - The stack trace from the original error\n * @param {?object} props - Properties to add to the error object\n */\nfunction extendError(error, stack, props) {\n  if (stack) {\n    error.stack += ' \\n\\n' + stack;\n  }\n\n  if (props && typeof(props) === 'object') {\n    var keys = Object.keys(props);\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i];\n      error[key] = props[key];\n    }\n  }\n\n  error.toJSON = errorToJSON;\n}\n\n/**\n * Custom JSON serializer for Error objects.\n * Returns all built-in error properties, as well as extended properties.\n *\n * @returns {object}\n */\nfunction errorToJSON() {\n  // jshint -W040\n\n  // All Errors have \"name\" and \"message\"\n  var json = {\n    name: this.name,\n    message: this.message\n  };\n\n  // Append any custom properties that were added\n  var keys = Object.keys(this);\n\n  // Also include any vendor-specific Error properties\n  keys = keys.concat(['description', 'number', 'fileName', 'lineNumber', 'columnNumber', 'stack']);\n\n  for (var i = 0; i < keys.length; i++) {\n    var key = keys[i];\n    var value = this[key];\n    if (value !== undefined) {\n      json[key] = value;\n    }\n  }\n\n  return json;\n}\n",
-    "'use strict';\nmodule.exports = nextTick;\n\nfunction nextTick(fn) {\n  var args = new Array(arguments.length - 1);\n  var i = 0;\n  while (i < args.length) {\n    args[i++] = arguments[i];\n  }\n  process.nextTick(function afterTick() {\n    fn.apply(null, args);\n  });\n}\n",
+    "/**!\n * Ono v2.0.1\n *\n * @link https://github.com/BigstickCarpet/ono\n * @license MIT\n */\n'use strict';\n\nvar util  = require('util'),\n    slice = Array.prototype.slice,\n    vendorSpecificErrorProperties = [\n      'name', 'message', 'description', 'number', 'fileName', 'lineNumber', 'columnNumber',\n      'sourceURL', 'line', 'column', 'stack'\n    ];\n\nmodule.exports = create(Error);\nmodule.exports.error = create(Error);\nmodule.exports.eval = create(EvalError);\nmodule.exports.range = create(RangeError);\nmodule.exports.reference = create(ReferenceError);\nmodule.exports.syntax = create(SyntaxError);\nmodule.exports.type = create(TypeError);\nmodule.exports.uri = create(URIError);\nmodule.exports.formatter = util.format;\n\n/**\n * Creates a new {@link ono} function that creates the given Error class.\n *\n * @param {Class} Klass - The Error subclass to create\n * @returns {ono}\n */\nfunction create(Klass) {\n  /**\n   * @param {Error}   [err]     - The original error, if any\n   * @param {object}  [props]   - An object whose properties will be added to the error object\n   * @param {string}  [message] - The error message. May contain {@link util#format} placeholders\n   * @param {...*}    [params]  - Parameters that map to the `message` placeholders\n   * @returns {Error}\n   */\n  return function ono(err, props, message, params) {\n    var formattedMessage, stack;\n    var formatter = module.exports.formatter;\n\n    if (typeof(err) === 'string') {\n      formattedMessage = formatter.apply(null, arguments);\n      err = props = undefined;\n    }\n    else if (typeof(props) === 'string') {\n      formattedMessage = formatter.apply(null, slice.call(arguments, 1));\n    }\n    else {\n      formattedMessage = formatter.apply(null, slice.call(arguments, 2));\n    }\n\n    if (!(err instanceof Error)) {\n      props = err;\n      err = undefined;\n    }\n\n    if (err) {\n      // The inner-error's message will be added to the new message\n      formattedMessage += (formattedMessage ? ' \\n' : '') + err.message;\n    }\n\n    // Create the new error\n    // NOTE: DON'T move this to a separate function! We don't want to pollute the stack trace\n    var newError = new Klass(formattedMessage);\n\n    // Extend the new error with the additional properties\n    extendError(newError, err);   // Copy properties of the original error\n    extendToJSON(newError);       // Replace the original toJSON method\n    extend(newError, props);      // Copy custom properties, possibly including a custom toJSON method\n\n    return newError;\n  };\n}\n\n/**\n * Extends the targetError with the properties of the source error.\n *\n * @param {Error}   targetError - The error object to extend\n * @param {?Error}  sourceError - The source error object, if any\n */\nfunction extendError(targetError, sourceError) {\n  if (sourceError) {\n    var stack = sourceError.stack;\n    if (stack) {\n      targetError.stack += ' \\n\\n' + sourceError.stack;\n    }\n\n    extend(targetError, sourceError, true);\n  }\n}\n\n/**\n * JavaScript engines differ in how errors are serialized to JSON - especially when it comes\n * to custom error properties and stack traces.  So we add our own toJSON method that ALWAYS\n * outputs every property of the error.\n */\nfunction extendToJSON(error) {\n  error.toJSON = errorToJSON;\n\n  // Also add an inspect() method, for compatibility with Node.js' `util.inspect()` method\n  error.inspect = errorToJSON;\n}\n\n/**\n * Extends the target object with the properties of the source object.\n *\n * @param {object}  target - The object to extend\n * @param {?source} source - The object whose properties are copied\n * @param {boolean} omitVendorSpecificProperties - Skip vendor-specific Error properties\n */\nfunction extend(target, source, omitVendorSpecificProperties) {\n  if (source && typeof(source) === 'object') {\n    var keys = Object.keys(source);\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i];\n\n      // Don't bother trying to copy read-only vendor-specific Error properties\n      if (omitVendorSpecificProperties && vendorSpecificErrorProperties.indexOf(key) >= 0) {\n        continue;\n      }\n\n      try {\n        target[key] = source[key];\n      }\n      catch (e) {\n        // This property is read-only, so it can't be copied\n      }\n    }\n  }\n}\n\n/**\n * Custom JSON serializer for Error objects.\n * Returns all built-in error properties, as well as extended properties.\n *\n * @returns {object}\n */\nfunction errorToJSON() {\n  // jshint -W040\n  var json = {};\n\n  // Get all the properties of this error\n  var keys = Object.keys(this);\n\n  // Also include vendor-specific properties from the prototype\n  keys = keys.concat(vendorSpecificErrorProperties);\n\n  for (var i = 0; i < keys.length; i++) {\n    var key = keys[i];\n    var value = this[key];\n    if (value !== undefined) {\n      json[key] = value;\n    }\n  }\n\n  return json;\n}\n",
+    "'use strict';\n\nif (!process.version ||\n    process.version.indexOf('v0.') === 0 ||\n    process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {\n  module.exports = nextTick;\n} else {\n  module.exports = process.nextTick;\n}\n\nfunction nextTick(fn) {\n  var args = new Array(arguments.length - 1);\n  var i = 0;\n  while (i < args.length) {\n    args[i++] = arguments[i];\n  }\n  process.nextTick(function afterTick() {\n    fn.apply(null, args);\n  });\n}\n",
     "// shim for using process in browser\n\nvar process = module.exports = {};\nvar queue = [];\nvar draining = false;\nvar currentQueue;\nvar queueIndex = -1;\n\nfunction cleanUpNextTick() {\n    draining = false;\n    if (currentQueue.length) {\n        queue = currentQueue.concat(queue);\n    } else {\n        queueIndex = -1;\n    }\n    if (queue.length) {\n        drainQueue();\n    }\n}\n\nfunction drainQueue() {\n    if (draining) {\n        return;\n    }\n    var timeout = setTimeout(cleanUpNextTick);\n    draining = true;\n\n    var len = queue.length;\n    while(len) {\n        currentQueue = queue;\n        queue = [];\n        while (++queueIndex < len) {\n            if (currentQueue) {\n                currentQueue[queueIndex].run();\n            }\n        }\n        queueIndex = -1;\n        len = queue.length;\n    }\n    currentQueue = null;\n    draining = false;\n    clearTimeout(timeout);\n}\n\nprocess.nextTick = function (fun) {\n    var args = new Array(arguments.length - 1);\n    if (arguments.length > 1) {\n        for (var i = 1; i < arguments.length; i++) {\n            args[i - 1] = arguments[i];\n        }\n    }\n    queue.push(new Item(fun, args));\n    if (queue.length === 1 && !draining) {\n        setTimeout(drainQueue, 0);\n    }\n};\n\n// v8 likes predictible objects\nfunction Item(fun, array) {\n    this.fun = fun;\n    this.array = array;\n}\nItem.prototype.run = function () {\n    this.fun.apply(null, this.array);\n};\nprocess.title = 'browser';\nprocess.browser = true;\nprocess.env = {};\nprocess.argv = [];\nprocess.version = ''; // empty string to avoid regexp issues\nprocess.versions = {};\n\nfunction noop() {}\n\nprocess.on = noop;\nprocess.addListener = noop;\nprocess.once = noop;\nprocess.off = noop;\nprocess.removeListener = noop;\nprocess.removeAllListeners = noop;\nprocess.emit = noop;\n\nprocess.binding = function (name) {\n    throw new Error('process.binding is not supported');\n};\n\nprocess.cwd = function () { return '/' };\nprocess.chdir = function (dir) {\n    throw new Error('process.chdir is not supported');\n};\nprocess.umask = function() { return 0; };\n",
-    "/*! https://mths.be/punycode v1.3.2 by @mathias */\n;(function(root) {\n\n\t/** Detect free variables */\n\tvar freeExports = typeof exports == 'object' && exports &&\n\t\t!exports.nodeType && exports;\n\tvar freeModule = typeof module == 'object' && module &&\n\t\t!module.nodeType && module;\n\tvar freeGlobal = typeof global == 'object' && global;\n\tif (\n\t\tfreeGlobal.global === freeGlobal ||\n\t\tfreeGlobal.window === freeGlobal ||\n\t\tfreeGlobal.self === freeGlobal\n\t) {\n\t\troot = freeGlobal;\n\t}\n\n\t/**\n\t * The `punycode` object.\n\t * @name punycode\n\t * @type Object\n\t */\n\tvar punycode,\n\n\t/** Highest positive signed 32-bit float value */\n\tmaxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1\n\n\t/** Bootstring parameters */\n\tbase = 36,\n\ttMin = 1,\n\ttMax = 26,\n\tskew = 38,\n\tdamp = 700,\n\tinitialBias = 72,\n\tinitialN = 128, // 0x80\n\tdelimiter = '-', // '\\x2D'\n\n\t/** Regular expressions */\n\tregexPunycode = /^xn--/,\n\tregexNonASCII = /[^\\x20-\\x7E]/, // unprintable ASCII chars + non-ASCII chars\n\tregexSeparators = /[\\x2E\\u3002\\uFF0E\\uFF61]/g, // RFC 3490 separators\n\n\t/** Error messages */\n\terrors = {\n\t\t'overflow': 'Overflow: input needs wider integers to process',\n\t\t'not-basic': 'Illegal input >= 0x80 (not a basic code point)',\n\t\t'invalid-input': 'Invalid input'\n\t},\n\n\t/** Convenience shortcuts */\n\tbaseMinusTMin = base - tMin,\n\tfloor = Math.floor,\n\tstringFromCharCode = String.fromCharCode,\n\n\t/** Temporary variable */\n\tkey;\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/**\n\t * A generic error utility function.\n\t * @private\n\t * @param {String} type The error type.\n\t * @returns {Error} Throws a `RangeError` with the applicable error message.\n\t */\n\tfunction error(type) {\n\t\tthrow RangeError(errors[type]);\n\t}\n\n\t/**\n\t * A generic `Array#map` utility function.\n\t * @private\n\t * @param {Array} array The array to iterate over.\n\t * @param {Function} callback The function that gets called for every array\n\t * item.\n\t * @returns {Array} A new array of values returned by the callback function.\n\t */\n\tfunction map(array, fn) {\n\t\tvar length = array.length;\n\t\tvar result = [];\n\t\twhile (length--) {\n\t\t\tresult[length] = fn(array[length]);\n\t\t}\n\t\treturn result;\n\t}\n\n\t/**\n\t * A simple `Array#map`-like wrapper to work with domain name strings or email\n\t * addresses.\n\t * @private\n\t * @param {String} domain The domain name or email address.\n\t * @param {Function} callback The function that gets called for every\n\t * character.\n\t * @returns {Array} A new string of characters returned by the callback\n\t * function.\n\t */\n\tfunction mapDomain(string, fn) {\n\t\tvar parts = string.split('@');\n\t\tvar result = '';\n\t\tif (parts.length > 1) {\n\t\t\t// In email addresses, only the domain name should be punycoded. Leave\n\t\t\t// the local part (i.e. everything up to `@`) intact.\n\t\t\tresult = parts[0] + '@';\n\t\t\tstring = parts[1];\n\t\t}\n\t\t// Avoid `split(regex)` for IE8 compatibility. See #17.\n\t\tstring = string.replace(regexSeparators, '\\x2E');\n\t\tvar labels = string.split('.');\n\t\tvar encoded = map(labels, fn).join('.');\n\t\treturn result + encoded;\n\t}\n\n\t/**\n\t * Creates an array containing the numeric code points of each Unicode\n\t * character in the string. While JavaScript uses UCS-2 internally,\n\t * this function will convert a pair of surrogate halves (each of which\n\t * UCS-2 exposes as separate characters) into a single code point,\n\t * matching UTF-16.\n\t * @see `punycode.ucs2.encode`\n\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t * @memberOf punycode.ucs2\n\t * @name decode\n\t * @param {String} string The Unicode input string (UCS-2).\n\t * @returns {Array} The new array of code points.\n\t */\n\tfunction ucs2decode(string) {\n\t\tvar output = [],\n\t\t    counter = 0,\n\t\t    length = string.length,\n\t\t    value,\n\t\t    extra;\n\t\twhile (counter < length) {\n\t\t\tvalue = string.charCodeAt(counter++);\n\t\t\tif (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n\t\t\t\t// high surrogate, and there is a next character\n\t\t\t\textra = string.charCodeAt(counter++);\n\t\t\t\tif ((extra & 0xFC00) == 0xDC00) { // low surrogate\n\t\t\t\t\toutput.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n\t\t\t\t} else {\n\t\t\t\t\t// unmatched surrogate; only append this code unit, in case the next\n\t\t\t\t\t// code unit is the high surrogate of a surrogate pair\n\t\t\t\t\toutput.push(value);\n\t\t\t\t\tcounter--;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\toutput.push(value);\n\t\t\t}\n\t\t}\n\t\treturn output;\n\t}\n\n\t/**\n\t * Creates a string based on an array of numeric code points.\n\t * @see `punycode.ucs2.decode`\n\t * @memberOf punycode.ucs2\n\t * @name encode\n\t * @param {Array} codePoints The array of numeric code points.\n\t * @returns {String} The new Unicode string (UCS-2).\n\t */\n\tfunction ucs2encode(array) {\n\t\treturn map(array, function(value) {\n\t\t\tvar output = '';\n\t\t\tif (value > 0xFFFF) {\n\t\t\t\tvalue -= 0x10000;\n\t\t\t\toutput += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);\n\t\t\t\tvalue = 0xDC00 | value & 0x3FF;\n\t\t\t}\n\t\t\toutput += stringFromCharCode(value);\n\t\t\treturn output;\n\t\t}).join('');\n\t}\n\n\t/**\n\t * Converts a basic code point into a digit/integer.\n\t * @see `digitToBasic()`\n\t * @private\n\t * @param {Number} codePoint The basic numeric code point value.\n\t * @returns {Number} The numeric value of a basic code point (for use in\n\t * representing integers) in the range `0` to `base - 1`, or `base` if\n\t * the code point does not represent a value.\n\t */\n\tfunction basicToDigit(codePoint) {\n\t\tif (codePoint - 48 < 10) {\n\t\t\treturn codePoint - 22;\n\t\t}\n\t\tif (codePoint - 65 < 26) {\n\t\t\treturn codePoint - 65;\n\t\t}\n\t\tif (codePoint - 97 < 26) {\n\t\t\treturn codePoint - 97;\n\t\t}\n\t\treturn base;\n\t}\n\n\t/**\n\t * Converts a digit/integer into a basic code point.\n\t * @see `basicToDigit()`\n\t * @private\n\t * @param {Number} digit The numeric value of a basic code point.\n\t * @returns {Number} The basic code point whose value (when used for\n\t * representing integers) is `digit`, which needs to be in the range\n\t * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is\n\t * used; else, the lowercase form is used. The behavior is undefined\n\t * if `flag` is non-zero and `digit` has no uppercase form.\n\t */\n\tfunction digitToBasic(digit, flag) {\n\t\t//  0..25 map to ASCII a..z or A..Z\n\t\t// 26..35 map to ASCII 0..9\n\t\treturn digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);\n\t}\n\n\t/**\n\t * Bias adaptation function as per section 3.4 of RFC 3492.\n\t * http://tools.ietf.org/html/rfc3492#section-3.4\n\t * @private\n\t */\n\tfunction adapt(delta, numPoints, firstTime) {\n\t\tvar k = 0;\n\t\tdelta = firstTime ? floor(delta / damp) : delta >> 1;\n\t\tdelta += floor(delta / numPoints);\n\t\tfor (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {\n\t\t\tdelta = floor(delta / baseMinusTMin);\n\t\t}\n\t\treturn floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n\t}\n\n\t/**\n\t * Converts a Punycode string of ASCII-only symbols to a string of Unicode\n\t * symbols.\n\t * @memberOf punycode\n\t * @param {String} input The Punycode string of ASCII-only symbols.\n\t * @returns {String} The resulting string of Unicode symbols.\n\t */\n\tfunction decode(input) {\n\t\t// Don't use UCS-2\n\t\tvar output = [],\n\t\t    inputLength = input.length,\n\t\t    out,\n\t\t    i = 0,\n\t\t    n = initialN,\n\t\t    bias = initialBias,\n\t\t    basic,\n\t\t    j,\n\t\t    index,\n\t\t    oldi,\n\t\t    w,\n\t\t    k,\n\t\t    digit,\n\t\t    t,\n\t\t    /** Cached calculation results */\n\t\t    baseMinusT;\n\n\t\t// Handle the basic code points: let `basic` be the number of input code\n\t\t// points before the last delimiter, or `0` if there is none, then copy\n\t\t// the first basic code points to the output.\n\n\t\tbasic = input.lastIndexOf(delimiter);\n\t\tif (basic < 0) {\n\t\t\tbasic = 0;\n\t\t}\n\n\t\tfor (j = 0; j < basic; ++j) {\n\t\t\t// if it's not a basic code point\n\t\t\tif (input.charCodeAt(j) >= 0x80) {\n\t\t\t\terror('not-basic');\n\t\t\t}\n\t\t\toutput.push(input.charCodeAt(j));\n\t\t}\n\n\t\t// Main decoding loop: start just after the last delimiter if any basic code\n\t\t// points were copied; start at the beginning otherwise.\n\n\t\tfor (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {\n\n\t\t\t// `index` is the index of the next character to be consumed.\n\t\t\t// Decode a generalized variable-length integer into `delta`,\n\t\t\t// which gets added to `i`. The overflow checking is easier\n\t\t\t// if we increase `i` as we go, then subtract off its starting\n\t\t\t// value at the end to obtain `delta`.\n\t\t\tfor (oldi = i, w = 1, k = base; /* no condition */; k += base) {\n\n\t\t\t\tif (index >= inputLength) {\n\t\t\t\t\terror('invalid-input');\n\t\t\t\t}\n\n\t\t\t\tdigit = basicToDigit(input.charCodeAt(index++));\n\n\t\t\t\tif (digit >= base || digit > floor((maxInt - i) / w)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\ti += digit * w;\n\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\n\t\t\t\tif (digit < t) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tbaseMinusT = base - t;\n\t\t\t\tif (w > floor(maxInt / baseMinusT)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tw *= baseMinusT;\n\n\t\t\t}\n\n\t\t\tout = output.length + 1;\n\t\t\tbias = adapt(i - oldi, out, oldi == 0);\n\n\t\t\t// `i` was supposed to wrap around from `out` to `0`,\n\t\t\t// incrementing `n` each time, so we'll fix that now:\n\t\t\tif (floor(i / out) > maxInt - n) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tn += floor(i / out);\n\t\t\ti %= out;\n\n\t\t\t// Insert `n` at position `i` of the output\n\t\t\toutput.splice(i++, 0, n);\n\n\t\t}\n\n\t\treturn ucs2encode(output);\n\t}\n\n\t/**\n\t * Converts a string of Unicode symbols (e.g. a domain name label) to a\n\t * Punycode string of ASCII-only symbols.\n\t * @memberOf punycode\n\t * @param {String} input The string of Unicode symbols.\n\t * @returns {String} The resulting Punycode string of ASCII-only symbols.\n\t */\n\tfunction encode(input) {\n\t\tvar n,\n\t\t    delta,\n\t\t    handledCPCount,\n\t\t    basicLength,\n\t\t    bias,\n\t\t    j,\n\t\t    m,\n\t\t    q,\n\t\t    k,\n\t\t    t,\n\t\t    currentValue,\n\t\t    output = [],\n\t\t    /** `inputLength` will hold the number of code points in `input`. */\n\t\t    inputLength,\n\t\t    /** Cached calculation results */\n\t\t    handledCPCountPlusOne,\n\t\t    baseMinusT,\n\t\t    qMinusT;\n\n\t\t// Convert the input in UCS-2 to Unicode\n\t\tinput = ucs2decode(input);\n\n\t\t// Cache the length\n\t\tinputLength = input.length;\n\n\t\t// Initialize the state\n\t\tn = initialN;\n\t\tdelta = 0;\n\t\tbias = initialBias;\n\n\t\t// Handle the basic code points\n\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\tcurrentValue = input[j];\n\t\t\tif (currentValue < 0x80) {\n\t\t\t\toutput.push(stringFromCharCode(currentValue));\n\t\t\t}\n\t\t}\n\n\t\thandledCPCount = basicLength = output.length;\n\n\t\t// `handledCPCount` is the number of code points that have been handled;\n\t\t// `basicLength` is the number of basic code points.\n\n\t\t// Finish the basic string - if it is not empty - with a delimiter\n\t\tif (basicLength) {\n\t\t\toutput.push(delimiter);\n\t\t}\n\n\t\t// Main encoding loop:\n\t\twhile (handledCPCount < inputLength) {\n\n\t\t\t// All non-basic code points < n have been handled already. Find the next\n\t\t\t// larger one:\n\t\t\tfor (m = maxInt, j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\t\t\t\tif (currentValue >= n && currentValue < m) {\n\t\t\t\t\tm = currentValue;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,\n\t\t\t// but guard against overflow\n\t\t\thandledCPCountPlusOne = handledCPCount + 1;\n\t\t\tif (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tdelta += (m - n) * handledCPCountPlusOne;\n\t\t\tn = m;\n\n\t\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\n\t\t\t\tif (currentValue < n && ++delta > maxInt) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tif (currentValue == n) {\n\t\t\t\t\t// Represent delta as a generalized variable-length integer\n\t\t\t\t\tfor (q = delta, k = base; /* no condition */; k += base) {\n\t\t\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\t\t\t\t\t\tif (q < t) {\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tqMinusT = q - t;\n\t\t\t\t\t\tbaseMinusT = base - t;\n\t\t\t\t\t\toutput.push(\n\t\t\t\t\t\t\tstringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))\n\t\t\t\t\t\t);\n\t\t\t\t\t\tq = floor(qMinusT / baseMinusT);\n\t\t\t\t\t}\n\n\t\t\t\t\toutput.push(stringFromCharCode(digitToBasic(q, 0)));\n\t\t\t\t\tbias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n\t\t\t\t\tdelta = 0;\n\t\t\t\t\t++handledCPCount;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t++delta;\n\t\t\t++n;\n\n\t\t}\n\t\treturn output.join('');\n\t}\n\n\t/**\n\t * Converts a Punycode string representing a domain name or an email address\n\t * to Unicode. Only the Punycoded parts of the input will be converted, i.e.\n\t * it doesn't matter if you call it on a string that has already been\n\t * converted to Unicode.\n\t * @memberOf punycode\n\t * @param {String} input The Punycoded domain name or email address to\n\t * convert to Unicode.\n\t * @returns {String} The Unicode representation of the given Punycode\n\t * string.\n\t */\n\tfunction toUnicode(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexPunycode.test(string)\n\t\t\t\t? decode(string.slice(4).toLowerCase())\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/**\n\t * Converts a Unicode string representing a domain name or an email address to\n\t * Punycode. Only the non-ASCII parts of the domain name will be converted,\n\t * i.e. it doesn't matter if you call it with a domain that's already in\n\t * ASCII.\n\t * @memberOf punycode\n\t * @param {String} input The domain name or email address to convert, as a\n\t * Unicode string.\n\t * @returns {String} The Punycode representation of the given domain name or\n\t * email address.\n\t */\n\tfunction toASCII(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexNonASCII.test(string)\n\t\t\t\t? 'xn--' + encode(string)\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/** Define the public API */\n\tpunycode = {\n\t\t/**\n\t\t * A string representing the current Punycode.js version number.\n\t\t * @memberOf punycode\n\t\t * @type String\n\t\t */\n\t\t'version': '1.3.2',\n\t\t/**\n\t\t * An object of methods to convert from JavaScript's internal character\n\t\t * representation (UCS-2) to Unicode code points, and back.\n\t\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t\t * @memberOf punycode\n\t\t * @type Object\n\t\t */\n\t\t'ucs2': {\n\t\t\t'decode': ucs2decode,\n\t\t\t'encode': ucs2encode\n\t\t},\n\t\t'decode': decode,\n\t\t'encode': encode,\n\t\t'toASCII': toASCII,\n\t\t'toUnicode': toUnicode\n\t};\n\n\t/** Expose `punycode` */\n\t// Some AMD build optimizers, like r.js, check for specific condition patterns\n\t// like the following:\n\tif (\n\t\ttypeof define == 'function' &&\n\t\ttypeof define.amd == 'object' &&\n\t\tdefine.amd\n\t) {\n\t\tdefine('punycode', function() {\n\t\t\treturn punycode;\n\t\t});\n\t} else if (freeExports && freeModule) {\n\t\tif (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+\n\t\t\tfreeModule.exports = punycode;\n\t\t} else { // in Narwhal or RingoJS v0.7.0-\n\t\t\tfor (key in punycode) {\n\t\t\t\tpunycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);\n\t\t\t}\n\t\t}\n\t} else { // in Rhino or a web browser\n\t\troot.punycode = punycode;\n\t}\n\n}(this));\n",
+    "/*! https://mths.be/punycode v1.4.0 by @mathias */\n;(function(root) {\n\n\t/** Detect free variables */\n\tvar freeExports = typeof exports == 'object' && exports &&\n\t\t!exports.nodeType && exports;\n\tvar freeModule = typeof module == 'object' && module &&\n\t\t!module.nodeType && module;\n\tvar freeGlobal = typeof global == 'object' && global;\n\tif (\n\t\tfreeGlobal.global === freeGlobal ||\n\t\tfreeGlobal.window === freeGlobal ||\n\t\tfreeGlobal.self === freeGlobal\n\t) {\n\t\troot = freeGlobal;\n\t}\n\n\t/**\n\t * The `punycode` object.\n\t * @name punycode\n\t * @type Object\n\t */\n\tvar punycode,\n\n\t/** Highest positive signed 32-bit float value */\n\tmaxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1\n\n\t/** Bootstring parameters */\n\tbase = 36,\n\ttMin = 1,\n\ttMax = 26,\n\tskew = 38,\n\tdamp = 700,\n\tinitialBias = 72,\n\tinitialN = 128, // 0x80\n\tdelimiter = '-', // '\\x2D'\n\n\t/** Regular expressions */\n\tregexPunycode = /^xn--/,\n\tregexNonASCII = /[^\\x20-\\x7E]/, // unprintable ASCII chars + non-ASCII chars\n\tregexSeparators = /[\\x2E\\u3002\\uFF0E\\uFF61]/g, // RFC 3490 separators\n\n\t/** Error messages */\n\terrors = {\n\t\t'overflow': 'Overflow: input needs wider integers to process',\n\t\t'not-basic': 'Illegal input >= 0x80 (not a basic code point)',\n\t\t'invalid-input': 'Invalid input'\n\t},\n\n\t/** Convenience shortcuts */\n\tbaseMinusTMin = base - tMin,\n\tfloor = Math.floor,\n\tstringFromCharCode = String.fromCharCode,\n\n\t/** Temporary variable */\n\tkey;\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/**\n\t * A generic error utility function.\n\t * @private\n\t * @param {String} type The error type.\n\t * @returns {Error} Throws a `RangeError` with the applicable error message.\n\t */\n\tfunction error(type) {\n\t\tthrow new RangeError(errors[type]);\n\t}\n\n\t/**\n\t * A generic `Array#map` utility function.\n\t * @private\n\t * @param {Array} array The array to iterate over.\n\t * @param {Function} callback The function that gets called for every array\n\t * item.\n\t * @returns {Array} A new array of values returned by the callback function.\n\t */\n\tfunction map(array, fn) {\n\t\tvar length = array.length;\n\t\tvar result = [];\n\t\twhile (length--) {\n\t\t\tresult[length] = fn(array[length]);\n\t\t}\n\t\treturn result;\n\t}\n\n\t/**\n\t * A simple `Array#map`-like wrapper to work with domain name strings or email\n\t * addresses.\n\t * @private\n\t * @param {String} domain The domain name or email address.\n\t * @param {Function} callback The function that gets called for every\n\t * character.\n\t * @returns {Array} A new string of characters returned by the callback\n\t * function.\n\t */\n\tfunction mapDomain(string, fn) {\n\t\tvar parts = string.split('@');\n\t\tvar result = '';\n\t\tif (parts.length > 1) {\n\t\t\t// In email addresses, only the domain name should be punycoded. Leave\n\t\t\t// the local part (i.e. everything up to `@`) intact.\n\t\t\tresult = parts[0] + '@';\n\t\t\tstring = parts[1];\n\t\t}\n\t\t// Avoid `split(regex)` for IE8 compatibility. See #17.\n\t\tstring = string.replace(regexSeparators, '\\x2E');\n\t\tvar labels = string.split('.');\n\t\tvar encoded = map(labels, fn).join('.');\n\t\treturn result + encoded;\n\t}\n\n\t/**\n\t * Creates an array containing the numeric code points of each Unicode\n\t * character in the string. While JavaScript uses UCS-2 internally,\n\t * this function will convert a pair of surrogate halves (each of which\n\t * UCS-2 exposes as separate characters) into a single code point,\n\t * matching UTF-16.\n\t * @see `punycode.ucs2.encode`\n\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t * @memberOf punycode.ucs2\n\t * @name decode\n\t * @param {String} string The Unicode input string (UCS-2).\n\t * @returns {Array} The new array of code points.\n\t */\n\tfunction ucs2decode(string) {\n\t\tvar output = [],\n\t\t    counter = 0,\n\t\t    length = string.length,\n\t\t    value,\n\t\t    extra;\n\t\twhile (counter < length) {\n\t\t\tvalue = string.charCodeAt(counter++);\n\t\t\tif (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n\t\t\t\t// high surrogate, and there is a next character\n\t\t\t\textra = string.charCodeAt(counter++);\n\t\t\t\tif ((extra & 0xFC00) == 0xDC00) { // low surrogate\n\t\t\t\t\toutput.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n\t\t\t\t} else {\n\t\t\t\t\t// unmatched surrogate; only append this code unit, in case the next\n\t\t\t\t\t// code unit is the high surrogate of a surrogate pair\n\t\t\t\t\toutput.push(value);\n\t\t\t\t\tcounter--;\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\toutput.push(value);\n\t\t\t}\n\t\t}\n\t\treturn output;\n\t}\n\n\t/**\n\t * Creates a string based on an array of numeric code points.\n\t * @see `punycode.ucs2.decode`\n\t * @memberOf punycode.ucs2\n\t * @name encode\n\t * @param {Array} codePoints The array of numeric code points.\n\t * @returns {String} The new Unicode string (UCS-2).\n\t */\n\tfunction ucs2encode(array) {\n\t\treturn map(array, function(value) {\n\t\t\tvar output = '';\n\t\t\tif (value > 0xFFFF) {\n\t\t\t\tvalue -= 0x10000;\n\t\t\t\toutput += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);\n\t\t\t\tvalue = 0xDC00 | value & 0x3FF;\n\t\t\t}\n\t\t\toutput += stringFromCharCode(value);\n\t\t\treturn output;\n\t\t}).join('');\n\t}\n\n\t/**\n\t * Converts a basic code point into a digit/integer.\n\t * @see `digitToBasic()`\n\t * @private\n\t * @param {Number} codePoint The basic numeric code point value.\n\t * @returns {Number} The numeric value of a basic code point (for use in\n\t * representing integers) in the range `0` to `base - 1`, or `base` if\n\t * the code point does not represent a value.\n\t */\n\tfunction basicToDigit(codePoint) {\n\t\tif (codePoint - 48 < 10) {\n\t\t\treturn codePoint - 22;\n\t\t}\n\t\tif (codePoint - 65 < 26) {\n\t\t\treturn codePoint - 65;\n\t\t}\n\t\tif (codePoint - 97 < 26) {\n\t\t\treturn codePoint - 97;\n\t\t}\n\t\treturn base;\n\t}\n\n\t/**\n\t * Converts a digit/integer into a basic code point.\n\t * @see `basicToDigit()`\n\t * @private\n\t * @param {Number} digit The numeric value of a basic code point.\n\t * @returns {Number} The basic code point whose value (when used for\n\t * representing integers) is `digit`, which needs to be in the range\n\t * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is\n\t * used; else, the lowercase form is used. The behavior is undefined\n\t * if `flag` is non-zero and `digit` has no uppercase form.\n\t */\n\tfunction digitToBasic(digit, flag) {\n\t\t//  0..25 map to ASCII a..z or A..Z\n\t\t// 26..35 map to ASCII 0..9\n\t\treturn digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);\n\t}\n\n\t/**\n\t * Bias adaptation function as per section 3.4 of RFC 3492.\n\t * https://tools.ietf.org/html/rfc3492#section-3.4\n\t * @private\n\t */\n\tfunction adapt(delta, numPoints, firstTime) {\n\t\tvar k = 0;\n\t\tdelta = firstTime ? floor(delta / damp) : delta >> 1;\n\t\tdelta += floor(delta / numPoints);\n\t\tfor (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {\n\t\t\tdelta = floor(delta / baseMinusTMin);\n\t\t}\n\t\treturn floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n\t}\n\n\t/**\n\t * Converts a Punycode string of ASCII-only symbols to a string of Unicode\n\t * symbols.\n\t * @memberOf punycode\n\t * @param {String} input The Punycode string of ASCII-only symbols.\n\t * @returns {String} The resulting string of Unicode symbols.\n\t */\n\tfunction decode(input) {\n\t\t// Don't use UCS-2\n\t\tvar output = [],\n\t\t    inputLength = input.length,\n\t\t    out,\n\t\t    i = 0,\n\t\t    n = initialN,\n\t\t    bias = initialBias,\n\t\t    basic,\n\t\t    j,\n\t\t    index,\n\t\t    oldi,\n\t\t    w,\n\t\t    k,\n\t\t    digit,\n\t\t    t,\n\t\t    /** Cached calculation results */\n\t\t    baseMinusT;\n\n\t\t// Handle the basic code points: let `basic` be the number of input code\n\t\t// points before the last delimiter, or `0` if there is none, then copy\n\t\t// the first basic code points to the output.\n\n\t\tbasic = input.lastIndexOf(delimiter);\n\t\tif (basic < 0) {\n\t\t\tbasic = 0;\n\t\t}\n\n\t\tfor (j = 0; j < basic; ++j) {\n\t\t\t// if it's not a basic code point\n\t\t\tif (input.charCodeAt(j) >= 0x80) {\n\t\t\t\terror('not-basic');\n\t\t\t}\n\t\t\toutput.push(input.charCodeAt(j));\n\t\t}\n\n\t\t// Main decoding loop: start just after the last delimiter if any basic code\n\t\t// points were copied; start at the beginning otherwise.\n\n\t\tfor (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {\n\n\t\t\t// `index` is the index of the next character to be consumed.\n\t\t\t// Decode a generalized variable-length integer into `delta`,\n\t\t\t// which gets added to `i`. The overflow checking is easier\n\t\t\t// if we increase `i` as we go, then subtract off its starting\n\t\t\t// value at the end to obtain `delta`.\n\t\t\tfor (oldi = i, w = 1, k = base; /* no condition */; k += base) {\n\n\t\t\t\tif (index >= inputLength) {\n\t\t\t\t\terror('invalid-input');\n\t\t\t\t}\n\n\t\t\t\tdigit = basicToDigit(input.charCodeAt(index++));\n\n\t\t\t\tif (digit >= base || digit > floor((maxInt - i) / w)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\ti += digit * w;\n\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\n\t\t\t\tif (digit < t) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\n\t\t\t\tbaseMinusT = base - t;\n\t\t\t\tif (w > floor(maxInt / baseMinusT)) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tw *= baseMinusT;\n\n\t\t\t}\n\n\t\t\tout = output.length + 1;\n\t\t\tbias = adapt(i - oldi, out, oldi == 0);\n\n\t\t\t// `i` was supposed to wrap around from `out` to `0`,\n\t\t\t// incrementing `n` each time, so we'll fix that now:\n\t\t\tif (floor(i / out) > maxInt - n) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tn += floor(i / out);\n\t\t\ti %= out;\n\n\t\t\t// Insert `n` at position `i` of the output\n\t\t\toutput.splice(i++, 0, n);\n\n\t\t}\n\n\t\treturn ucs2encode(output);\n\t}\n\n\t/**\n\t * Converts a string of Unicode symbols (e.g. a domain name label) to a\n\t * Punycode string of ASCII-only symbols.\n\t * @memberOf punycode\n\t * @param {String} input The string of Unicode symbols.\n\t * @returns {String} The resulting Punycode string of ASCII-only symbols.\n\t */\n\tfunction encode(input) {\n\t\tvar n,\n\t\t    delta,\n\t\t    handledCPCount,\n\t\t    basicLength,\n\t\t    bias,\n\t\t    j,\n\t\t    m,\n\t\t    q,\n\t\t    k,\n\t\t    t,\n\t\t    currentValue,\n\t\t    output = [],\n\t\t    /** `inputLength` will hold the number of code points in `input`. */\n\t\t    inputLength,\n\t\t    /** Cached calculation results */\n\t\t    handledCPCountPlusOne,\n\t\t    baseMinusT,\n\t\t    qMinusT;\n\n\t\t// Convert the input in UCS-2 to Unicode\n\t\tinput = ucs2decode(input);\n\n\t\t// Cache the length\n\t\tinputLength = input.length;\n\n\t\t// Initialize the state\n\t\tn = initialN;\n\t\tdelta = 0;\n\t\tbias = initialBias;\n\n\t\t// Handle the basic code points\n\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\tcurrentValue = input[j];\n\t\t\tif (currentValue < 0x80) {\n\t\t\t\toutput.push(stringFromCharCode(currentValue));\n\t\t\t}\n\t\t}\n\n\t\thandledCPCount = basicLength = output.length;\n\n\t\t// `handledCPCount` is the number of code points that have been handled;\n\t\t// `basicLength` is the number of basic code points.\n\n\t\t// Finish the basic string - if it is not empty - with a delimiter\n\t\tif (basicLength) {\n\t\t\toutput.push(delimiter);\n\t\t}\n\n\t\t// Main encoding loop:\n\t\twhile (handledCPCount < inputLength) {\n\n\t\t\t// All non-basic code points < n have been handled already. Find the next\n\t\t\t// larger one:\n\t\t\tfor (m = maxInt, j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\t\t\t\tif (currentValue >= n && currentValue < m) {\n\t\t\t\t\tm = currentValue;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,\n\t\t\t// but guard against overflow\n\t\t\thandledCPCountPlusOne = handledCPCount + 1;\n\t\t\tif (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n\t\t\t\terror('overflow');\n\t\t\t}\n\n\t\t\tdelta += (m - n) * handledCPCountPlusOne;\n\t\t\tn = m;\n\n\t\t\tfor (j = 0; j < inputLength; ++j) {\n\t\t\t\tcurrentValue = input[j];\n\n\t\t\t\tif (currentValue < n && ++delta > maxInt) {\n\t\t\t\t\terror('overflow');\n\t\t\t\t}\n\n\t\t\t\tif (currentValue == n) {\n\t\t\t\t\t// Represent delta as a generalized variable-length integer\n\t\t\t\t\tfor (q = delta, k = base; /* no condition */; k += base) {\n\t\t\t\t\t\tt = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n\t\t\t\t\t\tif (q < t) {\n\t\t\t\t\t\t\tbreak;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tqMinusT = q - t;\n\t\t\t\t\t\tbaseMinusT = base - t;\n\t\t\t\t\t\toutput.push(\n\t\t\t\t\t\t\tstringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))\n\t\t\t\t\t\t);\n\t\t\t\t\t\tq = floor(qMinusT / baseMinusT);\n\t\t\t\t\t}\n\n\t\t\t\t\toutput.push(stringFromCharCode(digitToBasic(q, 0)));\n\t\t\t\t\tbias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n\t\t\t\t\tdelta = 0;\n\t\t\t\t\t++handledCPCount;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t++delta;\n\t\t\t++n;\n\n\t\t}\n\t\treturn output.join('');\n\t}\n\n\t/**\n\t * Converts a Punycode string representing a domain name or an email address\n\t * to Unicode. Only the Punycoded parts of the input will be converted, i.e.\n\t * it doesn't matter if you call it on a string that has already been\n\t * converted to Unicode.\n\t * @memberOf punycode\n\t * @param {String} input The Punycoded domain name or email address to\n\t * convert to Unicode.\n\t * @returns {String} The Unicode representation of the given Punycode\n\t * string.\n\t */\n\tfunction toUnicode(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexPunycode.test(string)\n\t\t\t\t? decode(string.slice(4).toLowerCase())\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/**\n\t * Converts a Unicode string representing a domain name or an email address to\n\t * Punycode. Only the non-ASCII parts of the domain name will be converted,\n\t * i.e. it doesn't matter if you call it with a domain that's already in\n\t * ASCII.\n\t * @memberOf punycode\n\t * @param {String} input The domain name or email address to convert, as a\n\t * Unicode string.\n\t * @returns {String} The Punycode representation of the given domain name or\n\t * email address.\n\t */\n\tfunction toASCII(input) {\n\t\treturn mapDomain(input, function(string) {\n\t\t\treturn regexNonASCII.test(string)\n\t\t\t\t? 'xn--' + encode(string)\n\t\t\t\t: string;\n\t\t});\n\t}\n\n\t/*--------------------------------------------------------------------------*/\n\n\t/** Define the public API */\n\tpunycode = {\n\t\t/**\n\t\t * A string representing the current Punycode.js version number.\n\t\t * @memberOf punycode\n\t\t * @type String\n\t\t */\n\t\t'version': '1.3.2',\n\t\t/**\n\t\t * An object of methods to convert from JavaScript's internal character\n\t\t * representation (UCS-2) to Unicode code points, and back.\n\t\t * @see <https://mathiasbynens.be/notes/javascript-encoding>\n\t\t * @memberOf punycode\n\t\t * @type Object\n\t\t */\n\t\t'ucs2': {\n\t\t\t'decode': ucs2decode,\n\t\t\t'encode': ucs2encode\n\t\t},\n\t\t'decode': decode,\n\t\t'encode': encode,\n\t\t'toASCII': toASCII,\n\t\t'toUnicode': toUnicode\n\t};\n\n\t/** Expose `punycode` */\n\t// Some AMD build optimizers, like r.js, check for specific condition patterns\n\t// like the following:\n\tif (\n\t\ttypeof define == 'function' &&\n\t\ttypeof define.amd == 'object' &&\n\t\tdefine.amd\n\t) {\n\t\tdefine('punycode', function() {\n\t\t\treturn punycode;\n\t\t});\n\t} else if (freeExports && freeModule) {\n\t\tif (module.exports == freeExports) {\n\t\t\t// in Node.js, io.js, or RingoJS v0.8.0+\n\t\t\tfreeModule.exports = punycode;\n\t\t} else {\n\t\t\t// in Narwhal or RingoJS v0.7.0-\n\t\t\tfor (key in punycode) {\n\t\t\t\tpunycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);\n\t\t\t}\n\t\t}\n\t} else {\n\t\t// in Rhino or a web browser\n\t\troot.punycode = punycode;\n\t}\n\n}(this));\n",
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\n// If obj.hasOwnProperty has been overridden, then calling\n// obj.hasOwnProperty(prop) will break.\n// See: https://github.com/joyent/node/issues/1707\nfunction hasOwnProperty(obj, prop) {\n  return Object.prototype.hasOwnProperty.call(obj, prop);\n}\n\nmodule.exports = function(qs, sep, eq, options) {\n  sep = sep || '&';\n  eq = eq || '=';\n  var obj = {};\n\n  if (typeof qs !== 'string' || qs.length === 0) {\n    return obj;\n  }\n\n  var regexp = /\\+/g;\n  qs = qs.split(sep);\n\n  var maxKeys = 1000;\n  if (options && typeof options.maxKeys === 'number') {\n    maxKeys = options.maxKeys;\n  }\n\n  var len = qs.length;\n  // maxKeys <= 0 means that we should not limit keys count\n  if (maxKeys > 0 && len > maxKeys) {\n    len = maxKeys;\n  }\n\n  for (var i = 0; i < len; ++i) {\n    var x = qs[i].replace(regexp, '%20'),\n        idx = x.indexOf(eq),\n        kstr, vstr, k, v;\n\n    if (idx >= 0) {\n      kstr = x.substr(0, idx);\n      vstr = x.substr(idx + 1);\n    } else {\n      kstr = x;\n      vstr = '';\n    }\n\n    k = decodeURIComponent(kstr);\n    v = decodeURIComponent(vstr);\n\n    if (!hasOwnProperty(obj, k)) {\n      obj[k] = v;\n    } else if (isArray(obj[k])) {\n      obj[k].push(v);\n    } else {\n      obj[k] = [obj[k], v];\n    }\n  }\n\n  return obj;\n};\n\nvar isArray = Array.isArray || function (xs) {\n  return Object.prototype.toString.call(xs) === '[object Array]';\n};\n",
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\nvar stringifyPrimitive = function(v) {\n  switch (typeof v) {\n    case 'string':\n      return v;\n\n    case 'boolean':\n      return v ? 'true' : 'false';\n\n    case 'number':\n      return isFinite(v) ? v : '';\n\n    default:\n      return '';\n  }\n};\n\nmodule.exports = function(obj, sep, eq, name) {\n  sep = sep || '&';\n  eq = eq || '=';\n  if (obj === null) {\n    obj = undefined;\n  }\n\n  if (typeof obj === 'object') {\n    return map(objectKeys(obj), function(k) {\n      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;\n      if (isArray(obj[k])) {\n        return map(obj[k], function(v) {\n          return ks + encodeURIComponent(stringifyPrimitive(v));\n        }).join(sep);\n      } else {\n        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));\n      }\n    }).join(sep);\n\n  }\n\n  if (!name) return '';\n  return encodeURIComponent(stringifyPrimitive(name)) + eq +\n         encodeURIComponent(stringifyPrimitive(obj));\n};\n\nvar isArray = Array.isArray || function (xs) {\n  return Object.prototype.toString.call(xs) === '[object Array]';\n};\n\nfunction map (xs, f) {\n  if (xs.map) return xs.map(f);\n  var res = [];\n  for (var i = 0; i < xs.length; i++) {\n    res.push(f(xs[i], i));\n  }\n  return res;\n}\n\nvar objectKeys = Object.keys || function (obj) {\n  var res = [];\n  for (var key in obj) {\n    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);\n  }\n  return res;\n};\n",
     "'use strict';\n\nexports.decode = exports.parse = require('./decode');\nexports.encode = exports.stringify = require('./encode');\n",
     "module.exports = require(\"./lib/_stream_duplex.js\")\n",
     "// a duplex stream is just a stream that is both readable and writable.\n// Since JS doesn't have multiple prototypal inheritance, this class\n// prototypally inherits from Readable, and then parasitically from\n// Writable.\n\n'use strict';\n\n/*<replacement>*/\nvar objectKeys = Object.keys || function (obj) {\n  var keys = [];\n  for (var key in obj) keys.push(key);\n  return keys;\n}\n/*</replacement>*/\n\n\nmodule.exports = Duplex;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nvar Readable = require('./_stream_readable');\nvar Writable = require('./_stream_writable');\n\nutil.inherits(Duplex, Readable);\n\nvar keys = objectKeys(Writable.prototype);\nfor (var v = 0; v < keys.length; v++) {\n  var method = keys[v];\n  if (!Duplex.prototype[method])\n    Duplex.prototype[method] = Writable.prototype[method];\n}\n\nfunction Duplex(options) {\n  if (!(this instanceof Duplex))\n    return new Duplex(options);\n\n  Readable.call(this, options);\n  Writable.call(this, options);\n\n  if (options && options.readable === false)\n    this.readable = false;\n\n  if (options && options.writable === false)\n    this.writable = false;\n\n  this.allowHalfOpen = true;\n  if (options && options.allowHalfOpen === false)\n    this.allowHalfOpen = false;\n\n  this.once('end', onend);\n}\n\n// the no-half-open enforcer\nfunction onend() {\n  // if we allow half-open state, or if the writable side ended,\n  // then we're ok.\n  if (this.allowHalfOpen || this._writableState.ended)\n    return;\n\n  // no more data can be written.\n  // But allow more writes to happen in this tick.\n  processNextTick(onEndNT, this);\n}\n\nfunction onEndNT(self) {\n  self.end();\n}\n\nfunction forEach (xs, f) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    f(xs[i], i);\n  }\n}\n",
     "// a passthrough stream.\n// basically just the most minimal sort of Transform stream.\n// Every written chunk gets output as-is.\n\n'use strict';\n\nmodule.exports = PassThrough;\n\nvar Transform = require('./_stream_transform');\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nutil.inherits(PassThrough, Transform);\n\nfunction PassThrough(options) {\n  if (!(this instanceof PassThrough))\n    return new PassThrough(options);\n\n  Transform.call(this, options);\n}\n\nPassThrough.prototype._transform = function(chunk, encoding, cb) {\n  cb(null, chunk);\n};\n",
-    "'use strict';\n\nmodule.exports = Readable;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar isArray = require('isarray');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar Buffer = require('buffer').Buffer;\n/*</replacement>*/\n\nReadable.ReadableState = ReadableState;\n\nvar EE = require('events');\n\n/*<replacement>*/\nvar EElistenerCount = function(emitter, type) {\n  return emitter.listeners(type).length;\n};\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar Stream;\n(function (){try{\n  Stream = require('st' + 'ream');\n}catch(_){}finally{\n  if (!Stream)\n    Stream = require('events').EventEmitter;\n}}())\n/*</replacement>*/\n\nvar Buffer = require('buffer').Buffer;\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar debugUtil = require('util');\nvar debug;\nif (debugUtil && debugUtil.debuglog) {\n  debug = debugUtil.debuglog('stream');\n} else {\n  debug = function () {};\n}\n/*</replacement>*/\n\nvar StringDecoder;\n\nutil.inherits(Readable, Stream);\n\nfunction ReadableState(options, stream) {\n  var Duplex = require('./_stream_duplex');\n\n  options = options || {};\n\n  // object stream flag. Used to make read(n) ignore n and to\n  // make all the buffer merging and length checks go away\n  this.objectMode = !!options.objectMode;\n\n  if (stream instanceof Duplex)\n    this.objectMode = this.objectMode || !!options.readableObjectMode;\n\n  // the point at which it stops calling _read() to fill the buffer\n  // Note: 0 is a valid value, means \"don't call _read preemptively ever\"\n  var hwm = options.highWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = ~~this.highWaterMark;\n\n  this.buffer = [];\n  this.length = 0;\n  this.pipes = null;\n  this.pipesCount = 0;\n  this.flowing = null;\n  this.ended = false;\n  this.endEmitted = false;\n  this.reading = false;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // whenever we return null, then we set a flag to say\n  // that we're awaiting a 'readable' event emission.\n  this.needReadable = false;\n  this.emittedReadable = false;\n  this.readableListening = false;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // when piping, we only care about 'readable' events that happen\n  // after read()ing all the bytes and not getting any pushback.\n  this.ranOut = false;\n\n  // the number of writers that are awaiting a drain event in .pipe()s\n  this.awaitDrain = 0;\n\n  // if true, a maybeReadMore has been scheduled\n  this.readingMore = false;\n\n  this.decoder = null;\n  this.encoding = null;\n  if (options.encoding) {\n    if (!StringDecoder)\n      StringDecoder = require('string_decoder/').StringDecoder;\n    this.decoder = new StringDecoder(options.encoding);\n    this.encoding = options.encoding;\n  }\n}\n\nfunction Readable(options) {\n  var Duplex = require('./_stream_duplex');\n\n  if (!(this instanceof Readable))\n    return new Readable(options);\n\n  this._readableState = new ReadableState(options, this);\n\n  // legacy\n  this.readable = true;\n\n  if (options && typeof options.read === 'function')\n    this._read = options.read;\n\n  Stream.call(this);\n}\n\n// Manually shove something into the read() buffer.\n// This returns true if the highWaterMark has not been hit yet,\n// similar to how Writable.write() returns true if you should\n// write() some more.\nReadable.prototype.push = function(chunk, encoding) {\n  var state = this._readableState;\n\n  if (!state.objectMode && typeof chunk === 'string') {\n    encoding = encoding || state.defaultEncoding;\n    if (encoding !== state.encoding) {\n      chunk = new Buffer(chunk, encoding);\n      encoding = '';\n    }\n  }\n\n  return readableAddChunk(this, state, chunk, encoding, false);\n};\n\n// Unshift should *always* be something directly out of read()\nReadable.prototype.unshift = function(chunk) {\n  var state = this._readableState;\n  return readableAddChunk(this, state, chunk, '', true);\n};\n\nReadable.prototype.isPaused = function() {\n  return this._readableState.flowing === false;\n};\n\nfunction readableAddChunk(stream, state, chunk, encoding, addToFront) {\n  var er = chunkInvalid(state, chunk);\n  if (er) {\n    stream.emit('error', er);\n  } else if (chunk === null) {\n    state.reading = false;\n    onEofChunk(stream, state);\n  } else if (state.objectMode || chunk && chunk.length > 0) {\n    if (state.ended && !addToFront) {\n      var e = new Error('stream.push() after EOF');\n      stream.emit('error', e);\n    } else if (state.endEmitted && addToFront) {\n      var e = new Error('stream.unshift() after end event');\n      stream.emit('error', e);\n    } else {\n      if (state.decoder && !addToFront && !encoding)\n        chunk = state.decoder.write(chunk);\n\n      if (!addToFront)\n        state.reading = false;\n\n      // if we want the data now, just emit it.\n      if (state.flowing && state.length === 0 && !state.sync) {\n        stream.emit('data', chunk);\n        stream.read(0);\n      } else {\n        // update the buffer info.\n        state.length += state.objectMode ? 1 : chunk.length;\n        if (addToFront)\n          state.buffer.unshift(chunk);\n        else\n          state.buffer.push(chunk);\n\n        if (state.needReadable)\n          emitReadable(stream);\n      }\n\n      maybeReadMore(stream, state);\n    }\n  } else if (!addToFront) {\n    state.reading = false;\n  }\n\n  return needMoreData(state);\n}\n\n\n// if it's past the high water mark, we can push in some more.\n// Also, if we have no data yet, we can stand some\n// more bytes.  This is to work around cases where hwm=0,\n// such as the repl.  Also, if the push() triggered a\n// readable event, and the user called read(largeNumber) such that\n// needReadable was set, then we ought to push more, so that another\n// 'readable' event will be triggered.\nfunction needMoreData(state) {\n  return !state.ended &&\n         (state.needReadable ||\n          state.length < state.highWaterMark ||\n          state.length === 0);\n}\n\n// backwards compatibility.\nReadable.prototype.setEncoding = function(enc) {\n  if (!StringDecoder)\n    StringDecoder = require('string_decoder/').StringDecoder;\n  this._readableState.decoder = new StringDecoder(enc);\n  this._readableState.encoding = enc;\n  return this;\n};\n\n// Don't raise the hwm > 8MB\nvar MAX_HWM = 0x800000;\nfunction computeNewHighWaterMark(n) {\n  if (n >= MAX_HWM) {\n    n = MAX_HWM;\n  } else {\n    // Get the next highest power of 2\n    n--;\n    n |= n >>> 1;\n    n |= n >>> 2;\n    n |= n >>> 4;\n    n |= n >>> 8;\n    n |= n >>> 16;\n    n++;\n  }\n  return n;\n}\n\nfunction howMuchToRead(n, state) {\n  if (state.length === 0 && state.ended)\n    return 0;\n\n  if (state.objectMode)\n    return n === 0 ? 0 : 1;\n\n  if (n === null || isNaN(n)) {\n    // only flow one buffer at a time\n    if (state.flowing && state.buffer.length)\n      return state.buffer[0].length;\n    else\n      return state.length;\n  }\n\n  if (n <= 0)\n    return 0;\n\n  // If we're asking for more than the target buffer level,\n  // then raise the water mark.  Bump up to the next highest\n  // power of 2, to prevent increasing it excessively in tiny\n  // amounts.\n  if (n > state.highWaterMark)\n    state.highWaterMark = computeNewHighWaterMark(n);\n\n  // don't have that much.  return null, unless we've ended.\n  if (n > state.length) {\n    if (!state.ended) {\n      state.needReadable = true;\n      return 0;\n    } else {\n      return state.length;\n    }\n  }\n\n  return n;\n}\n\n// you can override either this method, or the async _read(n) below.\nReadable.prototype.read = function(n) {\n  debug('read', n);\n  var state = this._readableState;\n  var nOrig = n;\n\n  if (typeof n !== 'number' || n > 0)\n    state.emittedReadable = false;\n\n  // if we're doing read(0) to trigger a readable event, but we\n  // already have a bunch of data in the buffer, then just trigger\n  // the 'readable' event and move on.\n  if (n === 0 &&\n      state.needReadable &&\n      (state.length >= state.highWaterMark || state.ended)) {\n    debug('read: emitReadable', state.length, state.ended);\n    if (state.length === 0 && state.ended)\n      endReadable(this);\n    else\n      emitReadable(this);\n    return null;\n  }\n\n  n = howMuchToRead(n, state);\n\n  // if we've ended, and we're now clear, then finish it up.\n  if (n === 0 && state.ended) {\n    if (state.length === 0)\n      endReadable(this);\n    return null;\n  }\n\n  // All the actual chunk generation logic needs to be\n  // *below* the call to _read.  The reason is that in certain\n  // synthetic stream cases, such as passthrough streams, _read\n  // may be a completely synchronous operation which may change\n  // the state of the read buffer, providing enough data when\n  // before there was *not* enough.\n  //\n  // So, the steps are:\n  // 1. Figure out what the state of things will be after we do\n  // a read from the buffer.\n  //\n  // 2. If that resulting state will trigger a _read, then call _read.\n  // Note that this may be asynchronous, or synchronous.  Yes, it is\n  // deeply ugly to write APIs this way, but that still doesn't mean\n  // that the Readable class should behave improperly, as streams are\n  // designed to be sync/async agnostic.\n  // Take note if the _read call is sync or async (ie, if the read call\n  // has returned yet), so that we know whether or not it's safe to emit\n  // 'readable' etc.\n  //\n  // 3. Actually pull the requested chunks out of the buffer and return.\n\n  // if we need a readable event, then we need to do some reading.\n  var doRead = state.needReadable;\n  debug('need readable', doRead);\n\n  // if we currently have less than the highWaterMark, then also read some\n  if (state.length === 0 || state.length - n < state.highWaterMark) {\n    doRead = true;\n    debug('length less than watermark', doRead);\n  }\n\n  // however, if we've ended, then there's no point, and if we're already\n  // reading, then it's unnecessary.\n  if (state.ended || state.reading) {\n    doRead = false;\n    debug('reading or ended', doRead);\n  }\n\n  if (doRead) {\n    debug('do read');\n    state.reading = true;\n    state.sync = true;\n    // if the length is currently zero, then we *need* a readable event.\n    if (state.length === 0)\n      state.needReadable = true;\n    // call internal read method\n    this._read(state.highWaterMark);\n    state.sync = false;\n  }\n\n  // If _read pushed data synchronously, then `reading` will be false,\n  // and we need to re-evaluate how much data we can return to the user.\n  if (doRead && !state.reading)\n    n = howMuchToRead(nOrig, state);\n\n  var ret;\n  if (n > 0)\n    ret = fromList(n, state);\n  else\n    ret = null;\n\n  if (ret === null) {\n    state.needReadable = true;\n    n = 0;\n  }\n\n  state.length -= n;\n\n  // If we have nothing in the buffer, then we want to know\n  // as soon as we *do* get something into the buffer.\n  if (state.length === 0 && !state.ended)\n    state.needReadable = true;\n\n  // If we tried to read() past the EOF, then emit end on the next tick.\n  if (nOrig !== n && state.ended && state.length === 0)\n    endReadable(this);\n\n  if (ret !== null)\n    this.emit('data', ret);\n\n  return ret;\n};\n\nfunction chunkInvalid(state, chunk) {\n  var er = null;\n  if (!(Buffer.isBuffer(chunk)) &&\n      typeof chunk !== 'string' &&\n      chunk !== null &&\n      chunk !== undefined &&\n      !state.objectMode) {\n    er = new TypeError('Invalid non-string/buffer chunk');\n  }\n  return er;\n}\n\n\nfunction onEofChunk(stream, state) {\n  if (state.ended) return;\n  if (state.decoder) {\n    var chunk = state.decoder.end();\n    if (chunk && chunk.length) {\n      state.buffer.push(chunk);\n      state.length += state.objectMode ? 1 : chunk.length;\n    }\n  }\n  state.ended = true;\n\n  // emit 'readable' now to make sure it gets picked up.\n  emitReadable(stream);\n}\n\n// Don't emit readable right away in sync mode, because this can trigger\n// another read() call => stack overflow.  This way, it might trigger\n// a nextTick recursion warning, but that's not so bad.\nfunction emitReadable(stream) {\n  var state = stream._readableState;\n  state.needReadable = false;\n  if (!state.emittedReadable) {\n    debug('emitReadable', state.flowing);\n    state.emittedReadable = true;\n    if (state.sync)\n      processNextTick(emitReadable_, stream);\n    else\n      emitReadable_(stream);\n  }\n}\n\nfunction emitReadable_(stream) {\n  debug('emit readable');\n  stream.emit('readable');\n  flow(stream);\n}\n\n\n// at this point, the user has presumably seen the 'readable' event,\n// and called read() to consume some data.  that may have triggered\n// in turn another _read(n) call, in which case reading = true if\n// it's in progress.\n// However, if we're not ended, or reading, and the length < hwm,\n// then go ahead and try to read some more preemptively.\nfunction maybeReadMore(stream, state) {\n  if (!state.readingMore) {\n    state.readingMore = true;\n    processNextTick(maybeReadMore_, stream, state);\n  }\n}\n\nfunction maybeReadMore_(stream, state) {\n  var len = state.length;\n  while (!state.reading && !state.flowing && !state.ended &&\n         state.length < state.highWaterMark) {\n    debug('maybeReadMore read 0');\n    stream.read(0);\n    if (len === state.length)\n      // didn't get any data, stop spinning.\n      break;\n    else\n      len = state.length;\n  }\n  state.readingMore = false;\n}\n\n// abstract method.  to be overridden in specific implementation classes.\n// call cb(er, data) where data is <= n in length.\n// for virtual (non-string, non-buffer) streams, \"length\" is somewhat\n// arbitrary, and perhaps not very meaningful.\nReadable.prototype._read = function(n) {\n  this.emit('error', new Error('not implemented'));\n};\n\nReadable.prototype.pipe = function(dest, pipeOpts) {\n  var src = this;\n  var state = this._readableState;\n\n  switch (state.pipesCount) {\n    case 0:\n      state.pipes = dest;\n      break;\n    case 1:\n      state.pipes = [state.pipes, dest];\n      break;\n    default:\n      state.pipes.push(dest);\n      break;\n  }\n  state.pipesCount += 1;\n  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);\n\n  var doEnd = (!pipeOpts || pipeOpts.end !== false) &&\n              dest !== process.stdout &&\n              dest !== process.stderr;\n\n  var endFn = doEnd ? onend : cleanup;\n  if (state.endEmitted)\n    processNextTick(endFn);\n  else\n    src.once('end', endFn);\n\n  dest.on('unpipe', onunpipe);\n  function onunpipe(readable) {\n    debug('onunpipe');\n    if (readable === src) {\n      cleanup();\n    }\n  }\n\n  function onend() {\n    debug('onend');\n    dest.end();\n  }\n\n  // when the dest drains, it reduces the awaitDrain counter\n  // on the source.  This would be more elegant with a .once()\n  // handler in flow(), but adding and removing repeatedly is\n  // too slow.\n  var ondrain = pipeOnDrain(src);\n  dest.on('drain', ondrain);\n\n  var cleanedUp = false;\n  function cleanup() {\n    debug('cleanup');\n    // cleanup event handlers once the pipe is broken\n    dest.removeListener('close', onclose);\n    dest.removeListener('finish', onfinish);\n    dest.removeListener('drain', ondrain);\n    dest.removeListener('error', onerror);\n    dest.removeListener('unpipe', onunpipe);\n    src.removeListener('end', onend);\n    src.removeListener('end', cleanup);\n    src.removeListener('data', ondata);\n\n    cleanedUp = true;\n\n    // if the reader is waiting for a drain event from this\n    // specific writer, then it would cause it to never start\n    // flowing again.\n    // So, if this is awaiting a drain, then we just call it now.\n    // If we don't know, then assume that we are waiting for one.\n    if (state.awaitDrain &&\n        (!dest._writableState || dest._writableState.needDrain))\n      ondrain();\n  }\n\n  src.on('data', ondata);\n  function ondata(chunk) {\n    debug('ondata');\n    var ret = dest.write(chunk);\n    if (false === ret) {\n      // If the user unpiped during `dest.write()`, it is possible\n      // to get stuck in a permanently paused state if that write\n      // also returned false.\n      if (state.pipesCount === 1 &&\n          state.pipes[0] === dest &&\n          src.listenerCount('data') === 1 &&\n          !cleanedUp) {\n        debug('false write response, pause', src._readableState.awaitDrain);\n        src._readableState.awaitDrain++;\n      }\n      src.pause();\n    }\n  }\n\n  // if the dest has an error, then stop piping into it.\n  // however, don't suppress the throwing behavior for this.\n  function onerror(er) {\n    debug('onerror', er);\n    unpipe();\n    dest.removeListener('error', onerror);\n    if (EElistenerCount(dest, 'error') === 0)\n      dest.emit('error', er);\n  }\n  // This is a brutally ugly hack to make sure that our error handler\n  // is attached before any userland ones.  NEVER DO THIS.\n  if (!dest._events || !dest._events.error)\n    dest.on('error', onerror);\n  else if (isArray(dest._events.error))\n    dest._events.error.unshift(onerror);\n  else\n    dest._events.error = [onerror, dest._events.error];\n\n\n  // Both close and finish should trigger unpipe, but only once.\n  function onclose() {\n    dest.removeListener('finish', onfinish);\n    unpipe();\n  }\n  dest.once('close', onclose);\n  function onfinish() {\n    debug('onfinish');\n    dest.removeListener('close', onclose);\n    unpipe();\n  }\n  dest.once('finish', onfinish);\n\n  function unpipe() {\n    debug('unpipe');\n    src.unpipe(dest);\n  }\n\n  // tell the dest that it's being piped to\n  dest.emit('pipe', src);\n\n  // start the flow if it hasn't been started already.\n  if (!state.flowing) {\n    debug('pipe resume');\n    src.resume();\n  }\n\n  return dest;\n};\n\nfunction pipeOnDrain(src) {\n  return function() {\n    var state = src._readableState;\n    debug('pipeOnDrain', state.awaitDrain);\n    if (state.awaitDrain)\n      state.awaitDrain--;\n    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {\n      state.flowing = true;\n      flow(src);\n    }\n  };\n}\n\n\nReadable.prototype.unpipe = function(dest) {\n  var state = this._readableState;\n\n  // if we're not piping anywhere, then do nothing.\n  if (state.pipesCount === 0)\n    return this;\n\n  // just one destination.  most common case.\n  if (state.pipesCount === 1) {\n    // passed in one, but it's not the right one.\n    if (dest && dest !== state.pipes)\n      return this;\n\n    if (!dest)\n      dest = state.pipes;\n\n    // got a match.\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n    if (dest)\n      dest.emit('unpipe', this);\n    return this;\n  }\n\n  // slow case. multiple pipe destinations.\n\n  if (!dest) {\n    // remove all.\n    var dests = state.pipes;\n    var len = state.pipesCount;\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n\n    for (var i = 0; i < len; i++)\n      dests[i].emit('unpipe', this);\n    return this;\n  }\n\n  // try to find the right one.\n  var i = indexOf(state.pipes, dest);\n  if (i === -1)\n    return this;\n\n  state.pipes.splice(i, 1);\n  state.pipesCount -= 1;\n  if (state.pipesCount === 1)\n    state.pipes = state.pipes[0];\n\n  dest.emit('unpipe', this);\n\n  return this;\n};\n\n// set up data events if they are asked for\n// Ensure readable listeners eventually get something\nReadable.prototype.on = function(ev, fn) {\n  var res = Stream.prototype.on.call(this, ev, fn);\n\n  // If listening to data, and it has not explicitly been paused,\n  // then call resume to start the flow of data on the next tick.\n  if (ev === 'data' && false !== this._readableState.flowing) {\n    this.resume();\n  }\n\n  if (ev === 'readable' && this.readable) {\n    var state = this._readableState;\n    if (!state.readableListening) {\n      state.readableListening = true;\n      state.emittedReadable = false;\n      state.needReadable = true;\n      if (!state.reading) {\n        processNextTick(nReadingNextTick, this);\n      } else if (state.length) {\n        emitReadable(this, state);\n      }\n    }\n  }\n\n  return res;\n};\nReadable.prototype.addListener = Readable.prototype.on;\n\nfunction nReadingNextTick(self) {\n  debug('readable nexttick read 0');\n  self.read(0);\n}\n\n// pause() and resume() are remnants of the legacy readable stream API\n// If the user uses them, then switch into old mode.\nReadable.prototype.resume = function() {\n  var state = this._readableState;\n  if (!state.flowing) {\n    debug('resume');\n    state.flowing = true;\n    resume(this, state);\n  }\n  return this;\n};\n\nfunction resume(stream, state) {\n  if (!state.resumeScheduled) {\n    state.resumeScheduled = true;\n    processNextTick(resume_, stream, state);\n  }\n}\n\nfunction resume_(stream, state) {\n  if (!state.reading) {\n    debug('resume read 0');\n    stream.read(0);\n  }\n\n  state.resumeScheduled = false;\n  stream.emit('resume');\n  flow(stream);\n  if (state.flowing && !state.reading)\n    stream.read(0);\n}\n\nReadable.prototype.pause = function() {\n  debug('call pause flowing=%j', this._readableState.flowing);\n  if (false !== this._readableState.flowing) {\n    debug('pause');\n    this._readableState.flowing = false;\n    this.emit('pause');\n  }\n  return this;\n};\n\nfunction flow(stream) {\n  var state = stream._readableState;\n  debug('flow', state.flowing);\n  if (state.flowing) {\n    do {\n      var chunk = stream.read();\n    } while (null !== chunk && state.flowing);\n  }\n}\n\n// wrap an old-style stream as the async data source.\n// This is *not* part of the readable stream interface.\n// It is an ugly unfortunate mess of history.\nReadable.prototype.wrap = function(stream) {\n  var state = this._readableState;\n  var paused = false;\n\n  var self = this;\n  stream.on('end', function() {\n    debug('wrapped end');\n    if (state.decoder && !state.ended) {\n      var chunk = state.decoder.end();\n      if (chunk && chunk.length)\n        self.push(chunk);\n    }\n\n    self.push(null);\n  });\n\n  stream.on('data', function(chunk) {\n    debug('wrapped data');\n    if (state.decoder)\n      chunk = state.decoder.write(chunk);\n\n    // don't skip over falsy values in objectMode\n    if (state.objectMode && (chunk === null || chunk === undefined))\n      return;\n    else if (!state.objectMode && (!chunk || !chunk.length))\n      return;\n\n    var ret = self.push(chunk);\n    if (!ret) {\n      paused = true;\n      stream.pause();\n    }\n  });\n\n  // proxy all the other methods.\n  // important when wrapping filters and duplexes.\n  for (var i in stream) {\n    if (this[i] === undefined && typeof stream[i] === 'function') {\n      this[i] = function(method) { return function() {\n        return stream[method].apply(stream, arguments);\n      }; }(i);\n    }\n  }\n\n  // proxy certain important events.\n  var events = ['error', 'close', 'destroy', 'pause', 'resume'];\n  forEach(events, function(ev) {\n    stream.on(ev, self.emit.bind(self, ev));\n  });\n\n  // when we try to consume some more bytes, simply unpause the\n  // underlying stream.\n  self._read = function(n) {\n    debug('wrapped _read', n);\n    if (paused) {\n      paused = false;\n      stream.resume();\n    }\n  };\n\n  return self;\n};\n\n\n// exposed for testing purposes only.\nReadable._fromList = fromList;\n\n// Pluck off n bytes from an array of buffers.\n// Length is the combined lengths of all the buffers in the list.\nfunction fromList(n, state) {\n  var list = state.buffer;\n  var length = state.length;\n  var stringMode = !!state.decoder;\n  var objectMode = !!state.objectMode;\n  var ret;\n\n  // nothing in the list, definitely empty.\n  if (list.length === 0)\n    return null;\n\n  if (length === 0)\n    ret = null;\n  else if (objectMode)\n    ret = list.shift();\n  else if (!n || n >= length) {\n    // read it all, truncate the array.\n    if (stringMode)\n      ret = list.join('');\n    else if (list.length === 1)\n      ret = list[0];\n    else\n      ret = Buffer.concat(list, length);\n    list.length = 0;\n  } else {\n    // read just some of it.\n    if (n < list[0].length) {\n      // just take a part of the first list item.\n      // slice is the same for buffers and strings.\n      var buf = list[0];\n      ret = buf.slice(0, n);\n      list[0] = buf.slice(n);\n    } else if (n === list[0].length) {\n      // first list is a perfect match\n      ret = list.shift();\n    } else {\n      // complex case.\n      // we have enough to cover it, but it spans past the first buffer.\n      if (stringMode)\n        ret = '';\n      else\n        ret = new Buffer(n);\n\n      var c = 0;\n      for (var i = 0, l = list.length; i < l && c < n; i++) {\n        var buf = list[0];\n        var cpy = Math.min(n - c, buf.length);\n\n        if (stringMode)\n          ret += buf.slice(0, cpy);\n        else\n          buf.copy(ret, c, 0, cpy);\n\n        if (cpy < buf.length)\n          list[0] = buf.slice(cpy);\n        else\n          list.shift();\n\n        c += cpy;\n      }\n    }\n  }\n\n  return ret;\n}\n\nfunction endReadable(stream) {\n  var state = stream._readableState;\n\n  // If we get here before consuming all the bytes, then that is a\n  // bug in node.  Should never happen.\n  if (state.length > 0)\n    throw new Error('endReadable called on non-empty stream');\n\n  if (!state.endEmitted) {\n    state.ended = true;\n    processNextTick(endReadableNT, state, stream);\n  }\n}\n\nfunction endReadableNT(state, stream) {\n  // Check that we didn't get one last unshift.\n  if (!state.endEmitted && state.length === 0) {\n    state.endEmitted = true;\n    stream.readable = false;\n    stream.emit('end');\n  }\n}\n\nfunction forEach (xs, f) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    f(xs[i], i);\n  }\n}\n\nfunction indexOf (xs, x) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    if (xs[i] === x) return i;\n  }\n  return -1;\n}\n",
+    "'use strict';\n\nmodule.exports = Readable;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar isArray = require('isarray');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar Buffer = require('buffer').Buffer;\n/*</replacement>*/\n\nReadable.ReadableState = ReadableState;\n\nvar EE = require('events');\n\n/*<replacement>*/\nvar EElistenerCount = function(emitter, type) {\n  return emitter.listeners(type).length;\n};\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar Stream;\n(function (){try{\n  Stream = require('st' + 'ream');\n}catch(_){}finally{\n  if (!Stream)\n    Stream = require('events').EventEmitter;\n}}())\n/*</replacement>*/\n\nvar Buffer = require('buffer').Buffer;\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar debugUtil = require('util');\nvar debug;\nif (debugUtil && debugUtil.debuglog) {\n  debug = debugUtil.debuglog('stream');\n} else {\n  debug = function () {};\n}\n/*</replacement>*/\n\nvar StringDecoder;\n\nutil.inherits(Readable, Stream);\n\nvar Duplex;\nfunction ReadableState(options, stream) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  options = options || {};\n\n  // object stream flag. Used to make read(n) ignore n and to\n  // make all the buffer merging and length checks go away\n  this.objectMode = !!options.objectMode;\n\n  if (stream instanceof Duplex)\n    this.objectMode = this.objectMode || !!options.readableObjectMode;\n\n  // the point at which it stops calling _read() to fill the buffer\n  // Note: 0 is a valid value, means \"don't call _read preemptively ever\"\n  var hwm = options.highWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = ~~this.highWaterMark;\n\n  this.buffer = [];\n  this.length = 0;\n  this.pipes = null;\n  this.pipesCount = 0;\n  this.flowing = null;\n  this.ended = false;\n  this.endEmitted = false;\n  this.reading = false;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // whenever we return null, then we set a flag to say\n  // that we're awaiting a 'readable' event emission.\n  this.needReadable = false;\n  this.emittedReadable = false;\n  this.readableListening = false;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // when piping, we only care about 'readable' events that happen\n  // after read()ing all the bytes and not getting any pushback.\n  this.ranOut = false;\n\n  // the number of writers that are awaiting a drain event in .pipe()s\n  this.awaitDrain = 0;\n\n  // if true, a maybeReadMore has been scheduled\n  this.readingMore = false;\n\n  this.decoder = null;\n  this.encoding = null;\n  if (options.encoding) {\n    if (!StringDecoder)\n      StringDecoder = require('string_decoder/').StringDecoder;\n    this.decoder = new StringDecoder(options.encoding);\n    this.encoding = options.encoding;\n  }\n}\n\nvar Duplex;\nfunction Readable(options) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  if (!(this instanceof Readable))\n    return new Readable(options);\n\n  this._readableState = new ReadableState(options, this);\n\n  // legacy\n  this.readable = true;\n\n  if (options && typeof options.read === 'function')\n    this._read = options.read;\n\n  Stream.call(this);\n}\n\n// Manually shove something into the read() buffer.\n// This returns true if the highWaterMark has not been hit yet,\n// similar to how Writable.write() returns true if you should\n// write() some more.\nReadable.prototype.push = function(chunk, encoding) {\n  var state = this._readableState;\n\n  if (!state.objectMode && typeof chunk === 'string') {\n    encoding = encoding || state.defaultEncoding;\n    if (encoding !== state.encoding) {\n      chunk = new Buffer(chunk, encoding);\n      encoding = '';\n    }\n  }\n\n  return readableAddChunk(this, state, chunk, encoding, false);\n};\n\n// Unshift should *always* be something directly out of read()\nReadable.prototype.unshift = function(chunk) {\n  var state = this._readableState;\n  return readableAddChunk(this, state, chunk, '', true);\n};\n\nReadable.prototype.isPaused = function() {\n  return this._readableState.flowing === false;\n};\n\nfunction readableAddChunk(stream, state, chunk, encoding, addToFront) {\n  var er = chunkInvalid(state, chunk);\n  if (er) {\n    stream.emit('error', er);\n  } else if (chunk === null) {\n    state.reading = false;\n    onEofChunk(stream, state);\n  } else if (state.objectMode || chunk && chunk.length > 0) {\n    if (state.ended && !addToFront) {\n      var e = new Error('stream.push() after EOF');\n      stream.emit('error', e);\n    } else if (state.endEmitted && addToFront) {\n      var e = new Error('stream.unshift() after end event');\n      stream.emit('error', e);\n    } else {\n      if (state.decoder && !addToFront && !encoding)\n        chunk = state.decoder.write(chunk);\n\n      if (!addToFront)\n        state.reading = false;\n\n      // if we want the data now, just emit it.\n      if (state.flowing && state.length === 0 && !state.sync) {\n        stream.emit('data', chunk);\n        stream.read(0);\n      } else {\n        // update the buffer info.\n        state.length += state.objectMode ? 1 : chunk.length;\n        if (addToFront)\n          state.buffer.unshift(chunk);\n        else\n          state.buffer.push(chunk);\n\n        if (state.needReadable)\n          emitReadable(stream);\n      }\n\n      maybeReadMore(stream, state);\n    }\n  } else if (!addToFront) {\n    state.reading = false;\n  }\n\n  return needMoreData(state);\n}\n\n\n// if it's past the high water mark, we can push in some more.\n// Also, if we have no data yet, we can stand some\n// more bytes.  This is to work around cases where hwm=0,\n// such as the repl.  Also, if the push() triggered a\n// readable event, and the user called read(largeNumber) such that\n// needReadable was set, then we ought to push more, so that another\n// 'readable' event will be triggered.\nfunction needMoreData(state) {\n  return !state.ended &&\n         (state.needReadable ||\n          state.length < state.highWaterMark ||\n          state.length === 0);\n}\n\n// backwards compatibility.\nReadable.prototype.setEncoding = function(enc) {\n  if (!StringDecoder)\n    StringDecoder = require('string_decoder/').StringDecoder;\n  this._readableState.decoder = new StringDecoder(enc);\n  this._readableState.encoding = enc;\n  return this;\n};\n\n// Don't raise the hwm > 8MB\nvar MAX_HWM = 0x800000;\nfunction computeNewHighWaterMark(n) {\n  if (n >= MAX_HWM) {\n    n = MAX_HWM;\n  } else {\n    // Get the next highest power of 2\n    n--;\n    n |= n >>> 1;\n    n |= n >>> 2;\n    n |= n >>> 4;\n    n |= n >>> 8;\n    n |= n >>> 16;\n    n++;\n  }\n  return n;\n}\n\nfunction howMuchToRead(n, state) {\n  if (state.length === 0 && state.ended)\n    return 0;\n\n  if (state.objectMode)\n    return n === 0 ? 0 : 1;\n\n  if (n === null || isNaN(n)) {\n    // only flow one buffer at a time\n    if (state.flowing && state.buffer.length)\n      return state.buffer[0].length;\n    else\n      return state.length;\n  }\n\n  if (n <= 0)\n    return 0;\n\n  // If we're asking for more than the target buffer level,\n  // then raise the water mark.  Bump up to the next highest\n  // power of 2, to prevent increasing it excessively in tiny\n  // amounts.\n  if (n > state.highWaterMark)\n    state.highWaterMark = computeNewHighWaterMark(n);\n\n  // don't have that much.  return null, unless we've ended.\n  if (n > state.length) {\n    if (!state.ended) {\n      state.needReadable = true;\n      return 0;\n    } else {\n      return state.length;\n    }\n  }\n\n  return n;\n}\n\n// you can override either this method, or the async _read(n) below.\nReadable.prototype.read = function(n) {\n  debug('read', n);\n  var state = this._readableState;\n  var nOrig = n;\n\n  if (typeof n !== 'number' || n > 0)\n    state.emittedReadable = false;\n\n  // if we're doing read(0) to trigger a readable event, but we\n  // already have a bunch of data in the buffer, then just trigger\n  // the 'readable' event and move on.\n  if (n === 0 &&\n      state.needReadable &&\n      (state.length >= state.highWaterMark || state.ended)) {\n    debug('read: emitReadable', state.length, state.ended);\n    if (state.length === 0 && state.ended)\n      endReadable(this);\n    else\n      emitReadable(this);\n    return null;\n  }\n\n  n = howMuchToRead(n, state);\n\n  // if we've ended, and we're now clear, then finish it up.\n  if (n === 0 && state.ended) {\n    if (state.length === 0)\n      endReadable(this);\n    return null;\n  }\n\n  // All the actual chunk generation logic needs to be\n  // *below* the call to _read.  The reason is that in certain\n  // synthetic stream cases, such as passthrough streams, _read\n  // may be a completely synchronous operation which may change\n  // the state of the read buffer, providing enough data when\n  // before there was *not* enough.\n  //\n  // So, the steps are:\n  // 1. Figure out what the state of things will be after we do\n  // a read from the buffer.\n  //\n  // 2. If that resulting state will trigger a _read, then call _read.\n  // Note that this may be asynchronous, or synchronous.  Yes, it is\n  // deeply ugly to write APIs this way, but that still doesn't mean\n  // that the Readable class should behave improperly, as streams are\n  // designed to be sync/async agnostic.\n  // Take note if the _read call is sync or async (ie, if the read call\n  // has returned yet), so that we know whether or not it's safe to emit\n  // 'readable' etc.\n  //\n  // 3. Actually pull the requested chunks out of the buffer and return.\n\n  // if we need a readable event, then we need to do some reading.\n  var doRead = state.needReadable;\n  debug('need readable', doRead);\n\n  // if we currently have less than the highWaterMark, then also read some\n  if (state.length === 0 || state.length - n < state.highWaterMark) {\n    doRead = true;\n    debug('length less than watermark', doRead);\n  }\n\n  // however, if we've ended, then there's no point, and if we're already\n  // reading, then it's unnecessary.\n  if (state.ended || state.reading) {\n    doRead = false;\n    debug('reading or ended', doRead);\n  }\n\n  if (doRead) {\n    debug('do read');\n    state.reading = true;\n    state.sync = true;\n    // if the length is currently zero, then we *need* a readable event.\n    if (state.length === 0)\n      state.needReadable = true;\n    // call internal read method\n    this._read(state.highWaterMark);\n    state.sync = false;\n  }\n\n  // If _read pushed data synchronously, then `reading` will be false,\n  // and we need to re-evaluate how much data we can return to the user.\n  if (doRead && !state.reading)\n    n = howMuchToRead(nOrig, state);\n\n  var ret;\n  if (n > 0)\n    ret = fromList(n, state);\n  else\n    ret = null;\n\n  if (ret === null) {\n    state.needReadable = true;\n    n = 0;\n  }\n\n  state.length -= n;\n\n  // If we have nothing in the buffer, then we want to know\n  // as soon as we *do* get something into the buffer.\n  if (state.length === 0 && !state.ended)\n    state.needReadable = true;\n\n  // If we tried to read() past the EOF, then emit end on the next tick.\n  if (nOrig !== n && state.ended && state.length === 0)\n    endReadable(this);\n\n  if (ret !== null)\n    this.emit('data', ret);\n\n  return ret;\n};\n\nfunction chunkInvalid(state, chunk) {\n  var er = null;\n  if (!(Buffer.isBuffer(chunk)) &&\n      typeof chunk !== 'string' &&\n      chunk !== null &&\n      chunk !== undefined &&\n      !state.objectMode) {\n    er = new TypeError('Invalid non-string/buffer chunk');\n  }\n  return er;\n}\n\n\nfunction onEofChunk(stream, state) {\n  if (state.ended) return;\n  if (state.decoder) {\n    var chunk = state.decoder.end();\n    if (chunk && chunk.length) {\n      state.buffer.push(chunk);\n      state.length += state.objectMode ? 1 : chunk.length;\n    }\n  }\n  state.ended = true;\n\n  // emit 'readable' now to make sure it gets picked up.\n  emitReadable(stream);\n}\n\n// Don't emit readable right away in sync mode, because this can trigger\n// another read() call => stack overflow.  This way, it might trigger\n// a nextTick recursion warning, but that's not so bad.\nfunction emitReadable(stream) {\n  var state = stream._readableState;\n  state.needReadable = false;\n  if (!state.emittedReadable) {\n    debug('emitReadable', state.flowing);\n    state.emittedReadable = true;\n    if (state.sync)\n      processNextTick(emitReadable_, stream);\n    else\n      emitReadable_(stream);\n  }\n}\n\nfunction emitReadable_(stream) {\n  debug('emit readable');\n  stream.emit('readable');\n  flow(stream);\n}\n\n\n// at this point, the user has presumably seen the 'readable' event,\n// and called read() to consume some data.  that may have triggered\n// in turn another _read(n) call, in which case reading = true if\n// it's in progress.\n// However, if we're not ended, or reading, and the length < hwm,\n// then go ahead and try to read some more preemptively.\nfunction maybeReadMore(stream, state) {\n  if (!state.readingMore) {\n    state.readingMore = true;\n    processNextTick(maybeReadMore_, stream, state);\n  }\n}\n\nfunction maybeReadMore_(stream, state) {\n  var len = state.length;\n  while (!state.reading && !state.flowing && !state.ended &&\n         state.length < state.highWaterMark) {\n    debug('maybeReadMore read 0');\n    stream.read(0);\n    if (len === state.length)\n      // didn't get any data, stop spinning.\n      break;\n    else\n      len = state.length;\n  }\n  state.readingMore = false;\n}\n\n// abstract method.  to be overridden in specific implementation classes.\n// call cb(er, data) where data is <= n in length.\n// for virtual (non-string, non-buffer) streams, \"length\" is somewhat\n// arbitrary, and perhaps not very meaningful.\nReadable.prototype._read = function(n) {\n  this.emit('error', new Error('not implemented'));\n};\n\nReadable.prototype.pipe = function(dest, pipeOpts) {\n  var src = this;\n  var state = this._readableState;\n\n  switch (state.pipesCount) {\n    case 0:\n      state.pipes = dest;\n      break;\n    case 1:\n      state.pipes = [state.pipes, dest];\n      break;\n    default:\n      state.pipes.push(dest);\n      break;\n  }\n  state.pipesCount += 1;\n  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);\n\n  var doEnd = (!pipeOpts || pipeOpts.end !== false) &&\n              dest !== process.stdout &&\n              dest !== process.stderr;\n\n  var endFn = doEnd ? onend : cleanup;\n  if (state.endEmitted)\n    processNextTick(endFn);\n  else\n    src.once('end', endFn);\n\n  dest.on('unpipe', onunpipe);\n  function onunpipe(readable) {\n    debug('onunpipe');\n    if (readable === src) {\n      cleanup();\n    }\n  }\n\n  function onend() {\n    debug('onend');\n    dest.end();\n  }\n\n  // when the dest drains, it reduces the awaitDrain counter\n  // on the source.  This would be more elegant with a .once()\n  // handler in flow(), but adding and removing repeatedly is\n  // too slow.\n  var ondrain = pipeOnDrain(src);\n  dest.on('drain', ondrain);\n\n  var cleanedUp = false;\n  function cleanup() {\n    debug('cleanup');\n    // cleanup event handlers once the pipe is broken\n    dest.removeListener('close', onclose);\n    dest.removeListener('finish', onfinish);\n    dest.removeListener('drain', ondrain);\n    dest.removeListener('error', onerror);\n    dest.removeListener('unpipe', onunpipe);\n    src.removeListener('end', onend);\n    src.removeListener('end', cleanup);\n    src.removeListener('data', ondata);\n\n    cleanedUp = true;\n\n    // if the reader is waiting for a drain event from this\n    // specific writer, then it would cause it to never start\n    // flowing again.\n    // So, if this is awaiting a drain, then we just call it now.\n    // If we don't know, then assume that we are waiting for one.\n    if (state.awaitDrain &&\n        (!dest._writableState || dest._writableState.needDrain))\n      ondrain();\n  }\n\n  src.on('data', ondata);\n  function ondata(chunk) {\n    debug('ondata');\n    var ret = dest.write(chunk);\n    if (false === ret) {\n      // If the user unpiped during `dest.write()`, it is possible\n      // to get stuck in a permanently paused state if that write\n      // also returned false.\n      if (state.pipesCount === 1 &&\n          state.pipes[0] === dest &&\n          src.listenerCount('data') === 1 &&\n          !cleanedUp) {\n        debug('false write response, pause', src._readableState.awaitDrain);\n        src._readableState.awaitDrain++;\n      }\n      src.pause();\n    }\n  }\n\n  // if the dest has an error, then stop piping into it.\n  // however, don't suppress the throwing behavior for this.\n  function onerror(er) {\n    debug('onerror', er);\n    unpipe();\n    dest.removeListener('error', onerror);\n    if (EElistenerCount(dest, 'error') === 0)\n      dest.emit('error', er);\n  }\n  // This is a brutally ugly hack to make sure that our error handler\n  // is attached before any userland ones.  NEVER DO THIS.\n  if (!dest._events || !dest._events.error)\n    dest.on('error', onerror);\n  else if (isArray(dest._events.error))\n    dest._events.error.unshift(onerror);\n  else\n    dest._events.error = [onerror, dest._events.error];\n\n\n  // Both close and finish should trigger unpipe, but only once.\n  function onclose() {\n    dest.removeListener('finish', onfinish);\n    unpipe();\n  }\n  dest.once('close', onclose);\n  function onfinish() {\n    debug('onfinish');\n    dest.removeListener('close', onclose);\n    unpipe();\n  }\n  dest.once('finish', onfinish);\n\n  function unpipe() {\n    debug('unpipe');\n    src.unpipe(dest);\n  }\n\n  // tell the dest that it's being piped to\n  dest.emit('pipe', src);\n\n  // start the flow if it hasn't been started already.\n  if (!state.flowing) {\n    debug('pipe resume');\n    src.resume();\n  }\n\n  return dest;\n};\n\nfunction pipeOnDrain(src) {\n  return function() {\n    var state = src._readableState;\n    debug('pipeOnDrain', state.awaitDrain);\n    if (state.awaitDrain)\n      state.awaitDrain--;\n    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {\n      state.flowing = true;\n      flow(src);\n    }\n  };\n}\n\n\nReadable.prototype.unpipe = function(dest) {\n  var state = this._readableState;\n\n  // if we're not piping anywhere, then do nothing.\n  if (state.pipesCount === 0)\n    return this;\n\n  // just one destination.  most common case.\n  if (state.pipesCount === 1) {\n    // passed in one, but it's not the right one.\n    if (dest && dest !== state.pipes)\n      return this;\n\n    if (!dest)\n      dest = state.pipes;\n\n    // got a match.\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n    if (dest)\n      dest.emit('unpipe', this);\n    return this;\n  }\n\n  // slow case. multiple pipe destinations.\n\n  if (!dest) {\n    // remove all.\n    var dests = state.pipes;\n    var len = state.pipesCount;\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n\n    for (var i = 0; i < len; i++)\n      dests[i].emit('unpipe', this);\n    return this;\n  }\n\n  // try to find the right one.\n  var i = indexOf(state.pipes, dest);\n  if (i === -1)\n    return this;\n\n  state.pipes.splice(i, 1);\n  state.pipesCount -= 1;\n  if (state.pipesCount === 1)\n    state.pipes = state.pipes[0];\n\n  dest.emit('unpipe', this);\n\n  return this;\n};\n\n// set up data events if they are asked for\n// Ensure readable listeners eventually get something\nReadable.prototype.on = function(ev, fn) {\n  var res = Stream.prototype.on.call(this, ev, fn);\n\n  // If listening to data, and it has not explicitly been paused,\n  // then call resume to start the flow of data on the next tick.\n  if (ev === 'data' && false !== this._readableState.flowing) {\n    this.resume();\n  }\n\n  if (ev === 'readable' && this.readable) {\n    var state = this._readableState;\n    if (!state.readableListening) {\n      state.readableListening = true;\n      state.emittedReadable = false;\n      state.needReadable = true;\n      if (!state.reading) {\n        processNextTick(nReadingNextTick, this);\n      } else if (state.length) {\n        emitReadable(this, state);\n      }\n    }\n  }\n\n  return res;\n};\nReadable.prototype.addListener = Readable.prototype.on;\n\nfunction nReadingNextTick(self) {\n  debug('readable nexttick read 0');\n  self.read(0);\n}\n\n// pause() and resume() are remnants of the legacy readable stream API\n// If the user uses them, then switch into old mode.\nReadable.prototype.resume = function() {\n  var state = this._readableState;\n  if (!state.flowing) {\n    debug('resume');\n    state.flowing = true;\n    resume(this, state);\n  }\n  return this;\n};\n\nfunction resume(stream, state) {\n  if (!state.resumeScheduled) {\n    state.resumeScheduled = true;\n    processNextTick(resume_, stream, state);\n  }\n}\n\nfunction resume_(stream, state) {\n  if (!state.reading) {\n    debug('resume read 0');\n    stream.read(0);\n  }\n\n  state.resumeScheduled = false;\n  stream.emit('resume');\n  flow(stream);\n  if (state.flowing && !state.reading)\n    stream.read(0);\n}\n\nReadable.prototype.pause = function() {\n  debug('call pause flowing=%j', this._readableState.flowing);\n  if (false !== this._readableState.flowing) {\n    debug('pause');\n    this._readableState.flowing = false;\n    this.emit('pause');\n  }\n  return this;\n};\n\nfunction flow(stream) {\n  var state = stream._readableState;\n  debug('flow', state.flowing);\n  if (state.flowing) {\n    do {\n      var chunk = stream.read();\n    } while (null !== chunk && state.flowing);\n  }\n}\n\n// wrap an old-style stream as the async data source.\n// This is *not* part of the readable stream interface.\n// It is an ugly unfortunate mess of history.\nReadable.prototype.wrap = function(stream) {\n  var state = this._readableState;\n  var paused = false;\n\n  var self = this;\n  stream.on('end', function() {\n    debug('wrapped end');\n    if (state.decoder && !state.ended) {\n      var chunk = state.decoder.end();\n      if (chunk && chunk.length)\n        self.push(chunk);\n    }\n\n    self.push(null);\n  });\n\n  stream.on('data', function(chunk) {\n    debug('wrapped data');\n    if (state.decoder)\n      chunk = state.decoder.write(chunk);\n\n    // don't skip over falsy values in objectMode\n    if (state.objectMode && (chunk === null || chunk === undefined))\n      return;\n    else if (!state.objectMode && (!chunk || !chunk.length))\n      return;\n\n    var ret = self.push(chunk);\n    if (!ret) {\n      paused = true;\n      stream.pause();\n    }\n  });\n\n  // proxy all the other methods.\n  // important when wrapping filters and duplexes.\n  for (var i in stream) {\n    if (this[i] === undefined && typeof stream[i] === 'function') {\n      this[i] = function(method) { return function() {\n        return stream[method].apply(stream, arguments);\n      }; }(i);\n    }\n  }\n\n  // proxy certain important events.\n  var events = ['error', 'close', 'destroy', 'pause', 'resume'];\n  forEach(events, function(ev) {\n    stream.on(ev, self.emit.bind(self, ev));\n  });\n\n  // when we try to consume some more bytes, simply unpause the\n  // underlying stream.\n  self._read = function(n) {\n    debug('wrapped _read', n);\n    if (paused) {\n      paused = false;\n      stream.resume();\n    }\n  };\n\n  return self;\n};\n\n\n// exposed for testing purposes only.\nReadable._fromList = fromList;\n\n// Pluck off n bytes from an array of buffers.\n// Length is the combined lengths of all the buffers in the list.\nfunction fromList(n, state) {\n  var list = state.buffer;\n  var length = state.length;\n  var stringMode = !!state.decoder;\n  var objectMode = !!state.objectMode;\n  var ret;\n\n  // nothing in the list, definitely empty.\n  if (list.length === 0)\n    return null;\n\n  if (length === 0)\n    ret = null;\n  else if (objectMode)\n    ret = list.shift();\n  else if (!n || n >= length) {\n    // read it all, truncate the array.\n    if (stringMode)\n      ret = list.join('');\n    else if (list.length === 1)\n      ret = list[0];\n    else\n      ret = Buffer.concat(list, length);\n    list.length = 0;\n  } else {\n    // read just some of it.\n    if (n < list[0].length) {\n      // just take a part of the first list item.\n      // slice is the same for buffers and strings.\n      var buf = list[0];\n      ret = buf.slice(0, n);\n      list[0] = buf.slice(n);\n    } else if (n === list[0].length) {\n      // first list is a perfect match\n      ret = list.shift();\n    } else {\n      // complex case.\n      // we have enough to cover it, but it spans past the first buffer.\n      if (stringMode)\n        ret = '';\n      else\n        ret = new Buffer(n);\n\n      var c = 0;\n      for (var i = 0, l = list.length; i < l && c < n; i++) {\n        var buf = list[0];\n        var cpy = Math.min(n - c, buf.length);\n\n        if (stringMode)\n          ret += buf.slice(0, cpy);\n        else\n          buf.copy(ret, c, 0, cpy);\n\n        if (cpy < buf.length)\n          list[0] = buf.slice(cpy);\n        else\n          list.shift();\n\n        c += cpy;\n      }\n    }\n  }\n\n  return ret;\n}\n\nfunction endReadable(stream) {\n  var state = stream._readableState;\n\n  // If we get here before consuming all the bytes, then that is a\n  // bug in node.  Should never happen.\n  if (state.length > 0)\n    throw new Error('endReadable called on non-empty stream');\n\n  if (!state.endEmitted) {\n    state.ended = true;\n    processNextTick(endReadableNT, state, stream);\n  }\n}\n\nfunction endReadableNT(state, stream) {\n  // Check that we didn't get one last unshift.\n  if (!state.endEmitted && state.length === 0) {\n    state.endEmitted = true;\n    stream.readable = false;\n    stream.emit('end');\n  }\n}\n\nfunction forEach (xs, f) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    f(xs[i], i);\n  }\n}\n\nfunction indexOf (xs, x) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    if (xs[i] === x) return i;\n  }\n  return -1;\n}\n",
     "// a transform stream is a readable/writable stream where you do\n// something with the data.  Sometimes it's called a \"filter\",\n// but that's not a great name for it, since that implies a thing where\n// some bits pass through, and others are simply ignored.  (That would\n// be a valid example of a transform, of course.)\n//\n// While the output is causally related to the input, it's not a\n// necessarily symmetric or synchronous transformation.  For example,\n// a zlib stream might take multiple plain-text writes(), and then\n// emit a single compressed chunk some time in the future.\n//\n// Here's how this works:\n//\n// The Transform stream has all the aspects of the readable and writable\n// stream classes.  When you write(chunk), that calls _write(chunk,cb)\n// internally, and returns false if there's a lot of pending writes\n// buffered up.  When you call read(), that calls _read(n) until\n// there's enough pending readable data buffered up.\n//\n// In a transform stream, the written data is placed in a buffer.  When\n// _read(n) is called, it transforms the queued up data, calling the\n// buffered _write cb's as it consumes chunks.  If consuming a single\n// written chunk would result in multiple output chunks, then the first\n// outputted bit calls the readcb, and subsequent chunks just go into\n// the read buffer, and will cause it to emit 'readable' if necessary.\n//\n// This way, back-pressure is actually determined by the reading side,\n// since _read has to be called to start processing a new chunk.  However,\n// a pathological inflate type of transform can cause excessive buffering\n// here.  For example, imagine a stream where every byte of input is\n// interpreted as an integer from 0-255, and then results in that many\n// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in\n// 1kb of data being output.  In this case, you could write a very small\n// amount of input, and end up with a very large amount of output.  In\n// such a pathological inflating mechanism, there'd be no way to tell\n// the system to stop doing the transform.  A single 4MB write could\n// cause the system to run out of memory.\n//\n// However, even in such a pathological case, only a single written chunk\n// would be consumed, and then the rest would wait (un-transformed) until\n// the results of the previous transformed chunk were consumed.\n\n'use strict';\n\nmodule.exports = Transform;\n\nvar Duplex = require('./_stream_duplex');\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nutil.inherits(Transform, Duplex);\n\n\nfunction TransformState(stream) {\n  this.afterTransform = function(er, data) {\n    return afterTransform(stream, er, data);\n  };\n\n  this.needTransform = false;\n  this.transforming = false;\n  this.writecb = null;\n  this.writechunk = null;\n}\n\nfunction afterTransform(stream, er, data) {\n  var ts = stream._transformState;\n  ts.transforming = false;\n\n  var cb = ts.writecb;\n\n  if (!cb)\n    return stream.emit('error', new Error('no writecb in Transform class'));\n\n  ts.writechunk = null;\n  ts.writecb = null;\n\n  if (data !== null && data !== undefined)\n    stream.push(data);\n\n  if (cb)\n    cb(er);\n\n  var rs = stream._readableState;\n  rs.reading = false;\n  if (rs.needReadable || rs.length < rs.highWaterMark) {\n    stream._read(rs.highWaterMark);\n  }\n}\n\n\nfunction Transform(options) {\n  if (!(this instanceof Transform))\n    return new Transform(options);\n\n  Duplex.call(this, options);\n\n  this._transformState = new TransformState(this);\n\n  // when the writable side finishes, then flush out anything remaining.\n  var stream = this;\n\n  // start out asking for a readable event once data is transformed.\n  this._readableState.needReadable = true;\n\n  // we have implemented the _read method, and done the other things\n  // that Readable wants before the first _read call, so unset the\n  // sync guard flag.\n  this._readableState.sync = false;\n\n  if (options) {\n    if (typeof options.transform === 'function')\n      this._transform = options.transform;\n\n    if (typeof options.flush === 'function')\n      this._flush = options.flush;\n  }\n\n  this.once('prefinish', function() {\n    if (typeof this._flush === 'function')\n      this._flush(function(er) {\n        done(stream, er);\n      });\n    else\n      done(stream);\n  });\n}\n\nTransform.prototype.push = function(chunk, encoding) {\n  this._transformState.needTransform = false;\n  return Duplex.prototype.push.call(this, chunk, encoding);\n};\n\n// This is the part where you do stuff!\n// override this function in implementation classes.\n// 'chunk' is an input chunk.\n//\n// Call `push(newChunk)` to pass along transformed output\n// to the readable side.  You may call 'push' zero or more times.\n//\n// Call `cb(err)` when you are done with this chunk.  If you pass\n// an error, then that'll put the hurt on the whole operation.  If you\n// never call cb(), then you'll never get another chunk.\nTransform.prototype._transform = function(chunk, encoding, cb) {\n  throw new Error('not implemented');\n};\n\nTransform.prototype._write = function(chunk, encoding, cb) {\n  var ts = this._transformState;\n  ts.writecb = cb;\n  ts.writechunk = chunk;\n  ts.writeencoding = encoding;\n  if (!ts.transforming) {\n    var rs = this._readableState;\n    if (ts.needTransform ||\n        rs.needReadable ||\n        rs.length < rs.highWaterMark)\n      this._read(rs.highWaterMark);\n  }\n};\n\n// Doesn't matter what the args are here.\n// _transform does all the work.\n// That we got here means that the readable side wants more data.\nTransform.prototype._read = function(n) {\n  var ts = this._transformState;\n\n  if (ts.writechunk !== null && ts.writecb && !ts.transforming) {\n    ts.transforming = true;\n    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);\n  } else {\n    // mark that we need a transform, so that any data that comes in\n    // will get processed, now that we've asked for it.\n    ts.needTransform = true;\n  }\n};\n\n\nfunction done(stream, er) {\n  if (er)\n    return stream.emit('error', er);\n\n  // if there's nothing in the write buffer, then that means\n  // that nothing more will ever be provided\n  var ws = stream._writableState;\n  var ts = stream._transformState;\n\n  if (ws.length)\n    throw new Error('calling transform done when ws.length != 0');\n\n  if (ts.transforming)\n    throw new Error('calling transform done when still transforming');\n\n  return stream.push(null);\n}\n",
-    "// A bit simpler than readable streams.\n// Implement an async ._write(chunk, encoding, cb), and it'll handle all\n// the drain event emission and buffering.\n\n'use strict';\n\nmodule.exports = Writable;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar Buffer = require('buffer').Buffer;\n/*</replacement>*/\n\nWritable.WritableState = WritableState;\n\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar internalUtil = {\n  deprecate: require('util-deprecate')\n};\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar Stream;\n(function (){try{\n  Stream = require('st' + 'ream');\n}catch(_){}finally{\n  if (!Stream)\n    Stream = require('events').EventEmitter;\n}}())\n/*</replacement>*/\n\nvar Buffer = require('buffer').Buffer;\n\nutil.inherits(Writable, Stream);\n\nfunction nop() {}\n\nfunction WriteReq(chunk, encoding, cb) {\n  this.chunk = chunk;\n  this.encoding = encoding;\n  this.callback = cb;\n  this.next = null;\n}\n\nfunction WritableState(options, stream) {\n  var Duplex = require('./_stream_duplex');\n\n  options = options || {};\n\n  // object stream flag to indicate whether or not this stream\n  // contains buffers or objects.\n  this.objectMode = !!options.objectMode;\n\n  if (stream instanceof Duplex)\n    this.objectMode = this.objectMode || !!options.writableObjectMode;\n\n  // the point at which write() starts returning false\n  // Note: 0 is a valid value, means that we always return false if\n  // the entire buffer is not flushed immediately on write()\n  var hwm = options.highWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = ~~this.highWaterMark;\n\n  this.needDrain = false;\n  // at the start of calling end()\n  this.ending = false;\n  // when end() has been called, and returned\n  this.ended = false;\n  // when 'finish' is emitted\n  this.finished = false;\n\n  // should we decode strings into buffers before passing to _write?\n  // this is here so that some node-core streams can optimize string\n  // handling at a lower level.\n  var noDecode = options.decodeStrings === false;\n  this.decodeStrings = !noDecode;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // not an actual buffer we keep track of, but a measurement\n  // of how much we're waiting to get pushed to some underlying\n  // socket or file.\n  this.length = 0;\n\n  // a flag to see when we're in the middle of a write.\n  this.writing = false;\n\n  // when true all writes will be buffered until .uncork() call\n  this.corked = 0;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // a flag to know if we're processing previously buffered items, which\n  // may call the _write() callback in the same tick, so that we don't\n  // end up in an overlapped onwrite situation.\n  this.bufferProcessing = false;\n\n  // the callback that's passed to _write(chunk,cb)\n  this.onwrite = function(er) {\n    onwrite(stream, er);\n  };\n\n  // the callback that the user supplies to write(chunk,encoding,cb)\n  this.writecb = null;\n\n  // the amount that is being written when _write is called.\n  this.writelen = 0;\n\n  this.bufferedRequest = null;\n  this.lastBufferedRequest = null;\n\n  // number of pending user-supplied write callbacks\n  // this must be 0 before 'finish' can be emitted\n  this.pendingcb = 0;\n\n  // emit prefinish if the only thing we're waiting for is _write cbs\n  // This is relevant for synchronous Transform streams\n  this.prefinished = false;\n\n  // True if the error was already emitted and should not be thrown again\n  this.errorEmitted = false;\n}\n\nWritableState.prototype.getBuffer = function writableStateGetBuffer() {\n  var current = this.bufferedRequest;\n  var out = [];\n  while (current) {\n    out.push(current);\n    current = current.next;\n  }\n  return out;\n};\n\n(function (){try {\nObject.defineProperty(WritableState.prototype, 'buffer', {\n  get: internalUtil.deprecate(function() {\n    return this.getBuffer();\n  }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' +\n     'instead.')\n});\n}catch(_){}}());\n\n\nfunction Writable(options) {\n  var Duplex = require('./_stream_duplex');\n\n  // Writable ctor is applied to Duplexes, though they're not\n  // instanceof Writable, they're instanceof Readable.\n  if (!(this instanceof Writable) && !(this instanceof Duplex))\n    return new Writable(options);\n\n  this._writableState = new WritableState(options, this);\n\n  // legacy.\n  this.writable = true;\n\n  if (options) {\n    if (typeof options.write === 'function')\n      this._write = options.write;\n\n    if (typeof options.writev === 'function')\n      this._writev = options.writev;\n  }\n\n  Stream.call(this);\n}\n\n// Otherwise people can pipe Writable streams, which is just wrong.\nWritable.prototype.pipe = function() {\n  this.emit('error', new Error('Cannot pipe. Not readable.'));\n};\n\n\nfunction writeAfterEnd(stream, cb) {\n  var er = new Error('write after end');\n  // TODO: defer error events consistently everywhere, not just the cb\n  stream.emit('error', er);\n  processNextTick(cb, er);\n}\n\n// If we get something that is not a buffer, string, null, or undefined,\n// and we're not in objectMode, then that's an error.\n// Otherwise stream chunks are all considered to be of length=1, and the\n// watermarks determine how many objects to keep in the buffer, rather than\n// how many bytes or characters.\nfunction validChunk(stream, state, chunk, cb) {\n  var valid = true;\n\n  if (!(Buffer.isBuffer(chunk)) &&\n      typeof chunk !== 'string' &&\n      chunk !== null &&\n      chunk !== undefined &&\n      !state.objectMode) {\n    var er = new TypeError('Invalid non-string/buffer chunk');\n    stream.emit('error', er);\n    processNextTick(cb, er);\n    valid = false;\n  }\n  return valid;\n}\n\nWritable.prototype.write = function(chunk, encoding, cb) {\n  var state = this._writableState;\n  var ret = false;\n\n  if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (Buffer.isBuffer(chunk))\n    encoding = 'buffer';\n  else if (!encoding)\n    encoding = state.defaultEncoding;\n\n  if (typeof cb !== 'function')\n    cb = nop;\n\n  if (state.ended)\n    writeAfterEnd(this, cb);\n  else if (validChunk(this, state, chunk, cb)) {\n    state.pendingcb++;\n    ret = writeOrBuffer(this, state, chunk, encoding, cb);\n  }\n\n  return ret;\n};\n\nWritable.prototype.cork = function() {\n  var state = this._writableState;\n\n  state.corked++;\n};\n\nWritable.prototype.uncork = function() {\n  var state = this._writableState;\n\n  if (state.corked) {\n    state.corked--;\n\n    if (!state.writing &&\n        !state.corked &&\n        !state.finished &&\n        !state.bufferProcessing &&\n        state.bufferedRequest)\n      clearBuffer(this, state);\n  }\n};\n\nWritable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {\n  // node::ParseEncoding() requires lower case.\n  if (typeof encoding === 'string')\n    encoding = encoding.toLowerCase();\n  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64',\n'ucs2', 'ucs-2','utf16le', 'utf-16le', 'raw']\n.indexOf((encoding + '').toLowerCase()) > -1))\n    throw new TypeError('Unknown encoding: ' + encoding);\n  this._writableState.defaultEncoding = encoding;\n};\n\nfunction decodeChunk(state, chunk, encoding) {\n  if (!state.objectMode &&\n      state.decodeStrings !== false &&\n      typeof chunk === 'string') {\n    chunk = new Buffer(chunk, encoding);\n  }\n  return chunk;\n}\n\n// if we're already writing something, then just put this\n// in the queue, and wait our turn.  Otherwise, call _write\n// If we return false, then we need a drain event, so set that flag.\nfunction writeOrBuffer(stream, state, chunk, encoding, cb) {\n  chunk = decodeChunk(state, chunk, encoding);\n\n  if (Buffer.isBuffer(chunk))\n    encoding = 'buffer';\n  var len = state.objectMode ? 1 : chunk.length;\n\n  state.length += len;\n\n  var ret = state.length < state.highWaterMark;\n  // we must ensure that previous needDrain will not be reset to false.\n  if (!ret)\n    state.needDrain = true;\n\n  if (state.writing || state.corked) {\n    var last = state.lastBufferedRequest;\n    state.lastBufferedRequest = new WriteReq(chunk, encoding, cb);\n    if (last) {\n      last.next = state.lastBufferedRequest;\n    } else {\n      state.bufferedRequest = state.lastBufferedRequest;\n    }\n  } else {\n    doWrite(stream, state, false, len, chunk, encoding, cb);\n  }\n\n  return ret;\n}\n\nfunction doWrite(stream, state, writev, len, chunk, encoding, cb) {\n  state.writelen = len;\n  state.writecb = cb;\n  state.writing = true;\n  state.sync = true;\n  if (writev)\n    stream._writev(chunk, state.onwrite);\n  else\n    stream._write(chunk, encoding, state.onwrite);\n  state.sync = false;\n}\n\nfunction onwriteError(stream, state, sync, er, cb) {\n  --state.pendingcb;\n  if (sync)\n    processNextTick(cb, er);\n  else\n    cb(er);\n\n  stream._writableState.errorEmitted = true;\n  stream.emit('error', er);\n}\n\nfunction onwriteStateUpdate(state) {\n  state.writing = false;\n  state.writecb = null;\n  state.length -= state.writelen;\n  state.writelen = 0;\n}\n\nfunction onwrite(stream, er) {\n  var state = stream._writableState;\n  var sync = state.sync;\n  var cb = state.writecb;\n\n  onwriteStateUpdate(state);\n\n  if (er)\n    onwriteError(stream, state, sync, er, cb);\n  else {\n    // Check if we're actually ready to finish, but don't emit yet\n    var finished = needFinish(state);\n\n    if (!finished &&\n        !state.corked &&\n        !state.bufferProcessing &&\n        state.bufferedRequest) {\n      clearBuffer(stream, state);\n    }\n\n    if (sync) {\n      processNextTick(afterWrite, stream, state, finished, cb);\n    } else {\n      afterWrite(stream, state, finished, cb);\n    }\n  }\n}\n\nfunction afterWrite(stream, state, finished, cb) {\n  if (!finished)\n    onwriteDrain(stream, state);\n  state.pendingcb--;\n  cb();\n  finishMaybe(stream, state);\n}\n\n// Must force callback to be called on nextTick, so that we don't\n// emit 'drain' before the write() consumer gets the 'false' return\n// value, and has a chance to attach a 'drain' listener.\nfunction onwriteDrain(stream, state) {\n  if (state.length === 0 && state.needDrain) {\n    state.needDrain = false;\n    stream.emit('drain');\n  }\n}\n\n\n// if there's something in the buffer waiting, then process it\nfunction clearBuffer(stream, state) {\n  state.bufferProcessing = true;\n  var entry = state.bufferedRequest;\n\n  if (stream._writev && entry && entry.next) {\n    // Fast case, write everything using _writev()\n    var buffer = [];\n    var cbs = [];\n    while (entry) {\n      cbs.push(entry.callback);\n      buffer.push(entry);\n      entry = entry.next;\n    }\n\n    // count the one we are adding, as well.\n    // TODO(isaacs) clean this up\n    state.pendingcb++;\n    state.lastBufferedRequest = null;\n    doWrite(stream, state, true, state.length, buffer, '', function(err) {\n      for (var i = 0; i < cbs.length; i++) {\n        state.pendingcb--;\n        cbs[i](err);\n      }\n    });\n\n    // Clear buffer\n  } else {\n    // Slow case, write chunks one-by-one\n    while (entry) {\n      var chunk = entry.chunk;\n      var encoding = entry.encoding;\n      var cb = entry.callback;\n      var len = state.objectMode ? 1 : chunk.length;\n\n      doWrite(stream, state, false, len, chunk, encoding, cb);\n      entry = entry.next;\n      // if we didn't call the onwrite immediately, then\n      // it means that we need to wait until it does.\n      // also, that means that the chunk and cb are currently\n      // being processed, so move the buffer counter past them.\n      if (state.writing) {\n        break;\n      }\n    }\n\n    if (entry === null)\n      state.lastBufferedRequest = null;\n  }\n  state.bufferedRequest = entry;\n  state.bufferProcessing = false;\n}\n\nWritable.prototype._write = function(chunk, encoding, cb) {\n  cb(new Error('not implemented'));\n};\n\nWritable.prototype._writev = null;\n\nWritable.prototype.end = function(chunk, encoding, cb) {\n  var state = this._writableState;\n\n  if (typeof chunk === 'function') {\n    cb = chunk;\n    chunk = null;\n    encoding = null;\n  } else if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (chunk !== null && chunk !== undefined)\n    this.write(chunk, encoding);\n\n  // .end() fully uncorks\n  if (state.corked) {\n    state.corked = 1;\n    this.uncork();\n  }\n\n  // ignore unnecessary end() calls.\n  if (!state.ending && !state.finished)\n    endWritable(this, state, cb);\n};\n\n\nfunction needFinish(state) {\n  return (state.ending &&\n          state.length === 0 &&\n          state.bufferedRequest === null &&\n          !state.finished &&\n          !state.writing);\n}\n\nfunction prefinish(stream, state) {\n  if (!state.prefinished) {\n    state.prefinished = true;\n    stream.emit('prefinish');\n  }\n}\n\nfunction finishMaybe(stream, state) {\n  var need = needFinish(state);\n  if (need) {\n    if (state.pendingcb === 0) {\n      prefinish(stream, state);\n      state.finished = true;\n      stream.emit('finish');\n    } else {\n      prefinish(stream, state);\n    }\n  }\n  return need;\n}\n\nfunction endWritable(stream, state, cb) {\n  state.ending = true;\n  finishMaybe(stream, state);\n  if (cb) {\n    if (state.finished)\n      processNextTick(cb);\n    else\n      stream.once('finish', cb);\n  }\n  state.ended = true;\n}\n",
+    "// A bit simpler than readable streams.\n// Implement an async ._write(chunk, encoding, cb), and it'll handle all\n// the drain event emission and buffering.\n\n'use strict';\n\nmodule.exports = Writable;\n\n/*<replacement>*/\nvar processNextTick = require('process-nextick-args');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar Buffer = require('buffer').Buffer;\n/*</replacement>*/\n\nWritable.WritableState = WritableState;\n\n\n/*<replacement>*/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n\n/*<replacement>*/\nvar internalUtil = {\n  deprecate: require('util-deprecate')\n};\n/*</replacement>*/\n\n\n\n/*<replacement>*/\nvar Stream;\n(function (){try{\n  Stream = require('st' + 'ream');\n}catch(_){}finally{\n  if (!Stream)\n    Stream = require('events').EventEmitter;\n}}())\n/*</replacement>*/\n\nvar Buffer = require('buffer').Buffer;\n\nutil.inherits(Writable, Stream);\n\nfunction nop() {}\n\nfunction WriteReq(chunk, encoding, cb) {\n  this.chunk = chunk;\n  this.encoding = encoding;\n  this.callback = cb;\n  this.next = null;\n}\n\nvar Duplex;\nfunction WritableState(options, stream) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  options = options || {};\n\n  // object stream flag to indicate whether or not this stream\n  // contains buffers or objects.\n  this.objectMode = !!options.objectMode;\n\n  if (stream instanceof Duplex)\n    this.objectMode = this.objectMode || !!options.writableObjectMode;\n\n  // the point at which write() starts returning false\n  // Note: 0 is a valid value, means that we always return false if\n  // the entire buffer is not flushed immediately on write()\n  var hwm = options.highWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = ~~this.highWaterMark;\n\n  this.needDrain = false;\n  // at the start of calling end()\n  this.ending = false;\n  // when end() has been called, and returned\n  this.ended = false;\n  // when 'finish' is emitted\n  this.finished = false;\n\n  // should we decode strings into buffers before passing to _write?\n  // this is here so that some node-core streams can optimize string\n  // handling at a lower level.\n  var noDecode = options.decodeStrings === false;\n  this.decodeStrings = !noDecode;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // not an actual buffer we keep track of, but a measurement\n  // of how much we're waiting to get pushed to some underlying\n  // socket or file.\n  this.length = 0;\n\n  // a flag to see when we're in the middle of a write.\n  this.writing = false;\n\n  // when true all writes will be buffered until .uncork() call\n  this.corked = 0;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // a flag to know if we're processing previously buffered items, which\n  // may call the _write() callback in the same tick, so that we don't\n  // end up in an overlapped onwrite situation.\n  this.bufferProcessing = false;\n\n  // the callback that's passed to _write(chunk,cb)\n  this.onwrite = function(er) {\n    onwrite(stream, er);\n  };\n\n  // the callback that the user supplies to write(chunk,encoding,cb)\n  this.writecb = null;\n\n  // the amount that is being written when _write is called.\n  this.writelen = 0;\n\n  this.bufferedRequest = null;\n  this.lastBufferedRequest = null;\n\n  // number of pending user-supplied write callbacks\n  // this must be 0 before 'finish' can be emitted\n  this.pendingcb = 0;\n\n  // emit prefinish if the only thing we're waiting for is _write cbs\n  // This is relevant for synchronous Transform streams\n  this.prefinished = false;\n\n  // True if the error was already emitted and should not be thrown again\n  this.errorEmitted = false;\n}\n\nWritableState.prototype.getBuffer = function writableStateGetBuffer() {\n  var current = this.bufferedRequest;\n  var out = [];\n  while (current) {\n    out.push(current);\n    current = current.next;\n  }\n  return out;\n};\n\n(function (){try {\nObject.defineProperty(WritableState.prototype, 'buffer', {\n  get: internalUtil.deprecate(function() {\n    return this.getBuffer();\n  }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' +\n     'instead.')\n});\n}catch(_){}}());\n\n\nvar Duplex;\nfunction Writable(options) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  // Writable ctor is applied to Duplexes, though they're not\n  // instanceof Writable, they're instanceof Readable.\n  if (!(this instanceof Writable) && !(this instanceof Duplex))\n    return new Writable(options);\n\n  this._writableState = new WritableState(options, this);\n\n  // legacy.\n  this.writable = true;\n\n  if (options) {\n    if (typeof options.write === 'function')\n      this._write = options.write;\n\n    if (typeof options.writev === 'function')\n      this._writev = options.writev;\n  }\n\n  Stream.call(this);\n}\n\n// Otherwise people can pipe Writable streams, which is just wrong.\nWritable.prototype.pipe = function() {\n  this.emit('error', new Error('Cannot pipe. Not readable.'));\n};\n\n\nfunction writeAfterEnd(stream, cb) {\n  var er = new Error('write after end');\n  // TODO: defer error events consistently everywhere, not just the cb\n  stream.emit('error', er);\n  processNextTick(cb, er);\n}\n\n// If we get something that is not a buffer, string, null, or undefined,\n// and we're not in objectMode, then that's an error.\n// Otherwise stream chunks are all considered to be of length=1, and the\n// watermarks determine how many objects to keep in the buffer, rather than\n// how many bytes or characters.\nfunction validChunk(stream, state, chunk, cb) {\n  var valid = true;\n\n  if (!(Buffer.isBuffer(chunk)) &&\n      typeof chunk !== 'string' &&\n      chunk !== null &&\n      chunk !== undefined &&\n      !state.objectMode) {\n    var er = new TypeError('Invalid non-string/buffer chunk');\n    stream.emit('error', er);\n    processNextTick(cb, er);\n    valid = false;\n  }\n  return valid;\n}\n\nWritable.prototype.write = function(chunk, encoding, cb) {\n  var state = this._writableState;\n  var ret = false;\n\n  if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (Buffer.isBuffer(chunk))\n    encoding = 'buffer';\n  else if (!encoding)\n    encoding = state.defaultEncoding;\n\n  if (typeof cb !== 'function')\n    cb = nop;\n\n  if (state.ended)\n    writeAfterEnd(this, cb);\n  else if (validChunk(this, state, chunk, cb)) {\n    state.pendingcb++;\n    ret = writeOrBuffer(this, state, chunk, encoding, cb);\n  }\n\n  return ret;\n};\n\nWritable.prototype.cork = function() {\n  var state = this._writableState;\n\n  state.corked++;\n};\n\nWritable.prototype.uncork = function() {\n  var state = this._writableState;\n\n  if (state.corked) {\n    state.corked--;\n\n    if (!state.writing &&\n        !state.corked &&\n        !state.finished &&\n        !state.bufferProcessing &&\n        state.bufferedRequest)\n      clearBuffer(this, state);\n  }\n};\n\nWritable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {\n  // node::ParseEncoding() requires lower case.\n  if (typeof encoding === 'string')\n    encoding = encoding.toLowerCase();\n  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64',\n'ucs2', 'ucs-2','utf16le', 'utf-16le', 'raw']\n.indexOf((encoding + '').toLowerCase()) > -1))\n    throw new TypeError('Unknown encoding: ' + encoding);\n  this._writableState.defaultEncoding = encoding;\n};\n\nfunction decodeChunk(state, chunk, encoding) {\n  if (!state.objectMode &&\n      state.decodeStrings !== false &&\n      typeof chunk === 'string') {\n    chunk = new Buffer(chunk, encoding);\n  }\n  return chunk;\n}\n\n// if we're already writing something, then just put this\n// in the queue, and wait our turn.  Otherwise, call _write\n// If we return false, then we need a drain event, so set that flag.\nfunction writeOrBuffer(stream, state, chunk, encoding, cb) {\n  chunk = decodeChunk(state, chunk, encoding);\n\n  if (Buffer.isBuffer(chunk))\n    encoding = 'buffer';\n  var len = state.objectMode ? 1 : chunk.length;\n\n  state.length += len;\n\n  var ret = state.length < state.highWaterMark;\n  // we must ensure that previous needDrain will not be reset to false.\n  if (!ret)\n    state.needDrain = true;\n\n  if (state.writing || state.corked) {\n    var last = state.lastBufferedRequest;\n    state.lastBufferedRequest = new WriteReq(chunk, encoding, cb);\n    if (last) {\n      last.next = state.lastBufferedRequest;\n    } else {\n      state.bufferedRequest = state.lastBufferedRequest;\n    }\n  } else {\n    doWrite(stream, state, false, len, chunk, encoding, cb);\n  }\n\n  return ret;\n}\n\nfunction doWrite(stream, state, writev, len, chunk, encoding, cb) {\n  state.writelen = len;\n  state.writecb = cb;\n  state.writing = true;\n  state.sync = true;\n  if (writev)\n    stream._writev(chunk, state.onwrite);\n  else\n    stream._write(chunk, encoding, state.onwrite);\n  state.sync = false;\n}\n\nfunction onwriteError(stream, state, sync, er, cb) {\n  --state.pendingcb;\n  if (sync)\n    processNextTick(cb, er);\n  else\n    cb(er);\n\n  stream._writableState.errorEmitted = true;\n  stream.emit('error', er);\n}\n\nfunction onwriteStateUpdate(state) {\n  state.writing = false;\n  state.writecb = null;\n  state.length -= state.writelen;\n  state.writelen = 0;\n}\n\nfunction onwrite(stream, er) {\n  var state = stream._writableState;\n  var sync = state.sync;\n  var cb = state.writecb;\n\n  onwriteStateUpdate(state);\n\n  if (er)\n    onwriteError(stream, state, sync, er, cb);\n  else {\n    // Check if we're actually ready to finish, but don't emit yet\n    var finished = needFinish(state);\n\n    if (!finished &&\n        !state.corked &&\n        !state.bufferProcessing &&\n        state.bufferedRequest) {\n      clearBuffer(stream, state);\n    }\n\n    if (sync) {\n      processNextTick(afterWrite, stream, state, finished, cb);\n    } else {\n      afterWrite(stream, state, finished, cb);\n    }\n  }\n}\n\nfunction afterWrite(stream, state, finished, cb) {\n  if (!finished)\n    onwriteDrain(stream, state);\n  state.pendingcb--;\n  cb();\n  finishMaybe(stream, state);\n}\n\n// Must force callback to be called on nextTick, so that we don't\n// emit 'drain' before the write() consumer gets the 'false' return\n// value, and has a chance to attach a 'drain' listener.\nfunction onwriteDrain(stream, state) {\n  if (state.length === 0 && state.needDrain) {\n    state.needDrain = false;\n    stream.emit('drain');\n  }\n}\n\n\n// if there's something in the buffer waiting, then process it\nfunction clearBuffer(stream, state) {\n  state.bufferProcessing = true;\n  var entry = state.bufferedRequest;\n\n  if (stream._writev && entry && entry.next) {\n    // Fast case, write everything using _writev()\n    var buffer = [];\n    var cbs = [];\n    while (entry) {\n      cbs.push(entry.callback);\n      buffer.push(entry);\n      entry = entry.next;\n    }\n\n    // count the one we are adding, as well.\n    // TODO(isaacs) clean this up\n    state.pendingcb++;\n    state.lastBufferedRequest = null;\n    doWrite(stream, state, true, state.length, buffer, '', function(err) {\n      for (var i = 0; i < cbs.length; i++) {\n        state.pendingcb--;\n        cbs[i](err);\n      }\n    });\n\n    // Clear buffer\n  } else {\n    // Slow case, write chunks one-by-one\n    while (entry) {\n      var chunk = entry.chunk;\n      var encoding = entry.encoding;\n      var cb = entry.callback;\n      var len = state.objectMode ? 1 : chunk.length;\n\n      doWrite(stream, state, false, len, chunk, encoding, cb);\n      entry = entry.next;\n      // if we didn't call the onwrite immediately, then\n      // it means that we need to wait until it does.\n      // also, that means that the chunk and cb are currently\n      // being processed, so move the buffer counter past them.\n      if (state.writing) {\n        break;\n      }\n    }\n\n    if (entry === null)\n      state.lastBufferedRequest = null;\n  }\n  state.bufferedRequest = entry;\n  state.bufferProcessing = false;\n}\n\nWritable.prototype._write = function(chunk, encoding, cb) {\n  cb(new Error('not implemented'));\n};\n\nWritable.prototype._writev = null;\n\nWritable.prototype.end = function(chunk, encoding, cb) {\n  var state = this._writableState;\n\n  if (typeof chunk === 'function') {\n    cb = chunk;\n    chunk = null;\n    encoding = null;\n  } else if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (chunk !== null && chunk !== undefined)\n    this.write(chunk, encoding);\n\n  // .end() fully uncorks\n  if (state.corked) {\n    state.corked = 1;\n    this.uncork();\n  }\n\n  // ignore unnecessary end() calls.\n  if (!state.ending && !state.finished)\n    endWritable(this, state, cb);\n};\n\n\nfunction needFinish(state) {\n  return (state.ending &&\n          state.length === 0 &&\n          state.bufferedRequest === null &&\n          !state.finished &&\n          !state.writing);\n}\n\nfunction prefinish(stream, state) {\n  if (!state.prefinished) {\n    state.prefinished = true;\n    stream.emit('prefinish');\n  }\n}\n\nfunction finishMaybe(stream, state) {\n  var need = needFinish(state);\n  if (need) {\n    if (state.pendingcb === 0) {\n      prefinish(stream, state);\n      state.finished = true;\n      stream.emit('finish');\n    } else {\n      prefinish(stream, state);\n    }\n  }\n  return need;\n}\n\nfunction endWritable(stream, state, cb) {\n  state.ending = true;\n  finishMaybe(stream, state);\n  if (cb) {\n    if (state.finished)\n      processNextTick(cb);\n    else\n      stream.once('finish', cb);\n  }\n  state.ended = true;\n}\n",
     "module.exports = require(\"./lib/_stream_passthrough.js\")\n",
     "var Stream = (function (){\n  try {\n    return require('st' + 'ream'); // hack to fix a circular dependency issue when used with browserify\n  } catch(_){}\n}());\nexports = module.exports = require('./lib/_stream_readable.js');\nexports.Stream = Stream || exports;\nexports.Readable = exports;\nexports.Writable = require('./lib/_stream_writable.js');\nexports.Duplex = require('./lib/_stream_duplex.js');\nexports.Transform = require('./lib/_stream_transform.js');\nexports.PassThrough = require('./lib/_stream_passthrough.js');\n",
     "module.exports = require(\"./lib/_stream_transform.js\")\n",
@@ -187,15 +186,14 @@
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nmodule.exports = Stream;\n\nvar EE = require('events').EventEmitter;\nvar inherits = require('inherits');\n\ninherits(Stream, EE);\nStream.Readable = require('readable-stream/readable.js');\nStream.Writable = require('readable-stream/writable.js');\nStream.Duplex = require('readable-stream/duplex.js');\nStream.Transform = require('readable-stream/transform.js');\nStream.PassThrough = require('readable-stream/passthrough.js');\n\n// Backwards-compat with node 0.4.x\nStream.Stream = Stream;\n\n\n\n// old-style streams.  Note that the pipe method (the only relevant\n// part of this class) is overridden in the Readable class.\n\nfunction Stream() {\n  EE.call(this);\n}\n\nStream.prototype.pipe = function(dest, options) {\n  var source = this;\n\n  function ondata(chunk) {\n    if (dest.writable) {\n      if (false === dest.write(chunk) && source.pause) {\n        source.pause();\n      }\n    }\n  }\n\n  source.on('data', ondata);\n\n  function ondrain() {\n    if (source.readable && source.resume) {\n      source.resume();\n    }\n  }\n\n  dest.on('drain', ondrain);\n\n  // If the 'end' option is not supplied, dest.end() will be called when\n  // source gets the 'end' or 'close' events.  Only dest.end() once.\n  if (!dest._isStdio && (!options || options.end !== false)) {\n    source.on('end', onend);\n    source.on('close', onclose);\n  }\n\n  var didOnEnd = false;\n  function onend() {\n    if (didOnEnd) return;\n    didOnEnd = true;\n\n    dest.end();\n  }\n\n\n  function onclose() {\n    if (didOnEnd) return;\n    didOnEnd = true;\n\n    if (typeof dest.destroy === 'function') dest.destroy();\n  }\n\n  // don't leave dangling pipes when there are errors.\n  function onerror(er) {\n    cleanup();\n    if (EE.listenerCount(this, 'error') === 0) {\n      throw er; // Unhandled stream error in pipe.\n    }\n  }\n\n  source.on('error', onerror);\n  dest.on('error', onerror);\n\n  // remove all the event listeners that were added.\n  function cleanup() {\n    source.removeListener('data', ondata);\n    dest.removeListener('drain', ondrain);\n\n    source.removeListener('end', onend);\n    source.removeListener('close', onclose);\n\n    source.removeListener('error', onerror);\n    dest.removeListener('error', onerror);\n\n    source.removeListener('end', cleanup);\n    source.removeListener('close', cleanup);\n\n    dest.removeListener('close', cleanup);\n  }\n\n  source.on('end', cleanup);\n  source.on('close', cleanup);\n\n  dest.on('close', cleanup);\n\n  dest.emit('pipe', source);\n\n  // Allow for unix-like usage: A.pipe(B).pipe(C)\n  return dest;\n};\n",
     "var ClientRequest = require('./lib/request')\nvar extend = require('xtend')\nvar statusCodes = require('builtin-status-codes')\nvar url = require('url')\n\nvar http = exports\n\nhttp.request = function (opts, cb) {\n\tif (typeof opts === 'string')\n\t\topts = url.parse(opts)\n\telse\n\t\topts = extend(opts)\n\n\tvar protocol = opts.protocol || ''\n\tvar host = opts.hostname || opts.host\n\tvar port = opts.port\n\tvar path = opts.path || '/'\n\n\t// Necessary for IPv6 addresses\n\tif (host && host.indexOf(':') !== -1)\n\t\thost = '[' + host + ']'\n\n\t// This may be a relative url. The browser should always be able to interpret it correctly.\n\topts.url = (host ? (protocol + '//' + host) : '') + (port ? ':' + port : '') + path\n\topts.method = (opts.method || 'GET').toUpperCase()\n\topts.headers = opts.headers || {}\n\n\t// Also valid opts.auth, opts.mode\n\n\tvar req = new ClientRequest(opts)\n\tif (cb)\n\t\treq.on('response', cb)\n\treturn req\n}\n\nhttp.get = function get (opts, cb) {\n\tvar req = http.request(opts, cb)\n\treq.end()\n\treturn req\n}\n\nhttp.Agent = function () {}\nhttp.Agent.defaultMaxSockets = 4\n\nhttp.STATUS_CODES = statusCodes\n\nhttp.METHODS = [\n\t'CHECKOUT',\n\t'CONNECT',\n\t'COPY',\n\t'DELETE',\n\t'GET',\n\t'HEAD',\n\t'LOCK',\n\t'M-SEARCH',\n\t'MERGE',\n\t'MKACTIVITY',\n\t'MKCOL',\n\t'MOVE',\n\t'NOTIFY',\n\t'OPTIONS',\n\t'PATCH',\n\t'POST',\n\t'PROPFIND',\n\t'PROPPATCH',\n\t'PURGE',\n\t'PUT',\n\t'REPORT',\n\t'SEARCH',\n\t'SUBSCRIBE',\n\t'TRACE',\n\t'UNLOCK',\n\t'UNSUBSCRIBE'\n]",
     "exports.fetch = isFunction(global.fetch) && isFunction(global.ReadableByteStream)\n\nexports.blobConstructor = false\ntry {\n\tnew Blob([new ArrayBuffer(1)])\n\texports.blobConstructor = true\n} catch (e) {}\n\nvar xhr = new global.XMLHttpRequest()\n// If location.host is empty, e.g. if this page/worker was loaded\n// from a Blob, then use example.com to avoid an error\nxhr.open('GET', global.location.host ? '/' : 'https://example.com')\n\nfunction checkTypeSupport (type) {\n\ttry {\n\t\txhr.responseType = type\n\t\treturn xhr.responseType === type\n\t} catch (e) {}\n\treturn false\n}\n\n// For some strange reason, Safari 7.0 reports typeof global.ArrayBuffer === 'object'.\n// Safari 7.1 appears to have fixed this bug.\nvar haveArrayBuffer = typeof global.ArrayBuffer !== 'undefined'\nvar haveSlice = haveArrayBuffer && isFunction(global.ArrayBuffer.prototype.slice)\n\nexports.arraybuffer = haveArrayBuffer && checkTypeSupport('arraybuffer')\n// These next two tests unavoidably show warnings in Chrome. Since fetch will always\n// be used if it's available, just return false for these to avoid the warnings.\nexports.msstream = !exports.fetch && haveSlice && checkTypeSupport('ms-stream')\nexports.mozchunkedarraybuffer = !exports.fetch && haveArrayBuffer &&\n\tcheckTypeSupport('moz-chunked-arraybuffer')\nexports.overrideMimeType = isFunction(xhr.overrideMimeType)\nexports.vbArray = isFunction(global.VBArray)\n\nfunction isFunction (value) {\n  return typeof value === 'function'\n}\n\nxhr = null // Help gc\n",
-    "// var Base64 = require('Base64')\nvar capability = require('./capability')\nvar foreach = require('foreach')\nvar indexOf = require('indexof')\nvar inherits = require('inherits')\nvar keys = require('object-keys')\nvar response = require('./response')\nvar stream = require('stream')\n\nvar IncomingMessage = response.IncomingMessage\nvar rStates = response.readyStates\n\nfunction decideMode (preferBinary) {\n\tif (capability.fetch) {\n\t\treturn 'fetch'\n\t} else if (capability.mozchunkedarraybuffer) {\n\t\treturn 'moz-chunked-arraybuffer'\n\t} else if (capability.msstream) {\n\t\treturn 'ms-stream'\n\t} else if (capability.arraybuffer && preferBinary) {\n\t\treturn 'arraybuffer'\n\t} else if (capability.vbArray && preferBinary) {\n\t\treturn 'text:vbarray'\n\t} else {\n\t\treturn 'text'\n\t}\n}\n\nvar ClientRequest = module.exports = function (opts) {\n\tvar self = this\n\tstream.Writable.call(self)\n\n\tself._opts = opts\n\tself._body = []\n\tself._headers = {}\n\tif (opts.auth)\n\t\tself.setHeader('Authorization', 'Basic ' + new Buffer(opts.auth).toString('base64'))\n\tforeach(keys(opts.headers), function (name) {\n\t\tself.setHeader(name, opts.headers[name])\n\t})\n\n\tvar preferBinary\n\tif (opts.mode === 'prefer-streaming') {\n\t\t// If streaming is a high priority but binary compatibility and\n\t\t// the accuracy of the 'content-type' header aren't\n\t\tpreferBinary = false\n\t} else if (opts.mode === 'allow-wrong-content-type') {\n\t\t// If streaming is more important than preserving the 'content-type' header\n\t\tpreferBinary = !capability.overrideMimeType\n\t} else if (!opts.mode || opts.mode === 'default' || opts.mode === 'prefer-fast') {\n\t\t// Use binary if text streaming may corrupt data or the content-type header, or for speed\n\t\tpreferBinary = true\n\t} else {\n\t\tthrow new Error('Invalid value for opts.mode')\n\t}\n\tself._mode = decideMode(preferBinary)\n\n\tself.on('finish', function () {\n\t\tself._onFinish()\n\t})\n}\n\ninherits(ClientRequest, stream.Writable)\n\nClientRequest.prototype.setHeader = function (name, value) {\n\tvar self = this\n\tvar lowerName = name.toLowerCase()\n\t// This check is not necessary, but it prevents warnings from browsers about setting unsafe\n\t// headers. To be honest I'm not entirely sure hiding these warnings is a good thing, but\n\t// http-browserify did it, so I will too.\n\tif (indexOf(unsafeHeaders, lowerName) !== -1)\n\t\treturn\n\n\tself._headers[lowerName] = {\n\t\tname: name,\n\t\tvalue: value\n\t}\n}\n\nClientRequest.prototype.getHeader = function (name) {\n\tvar self = this\n\treturn self._headers[name.toLowerCase()].value\n}\n\nClientRequest.prototype.removeHeader = function (name) {\n\tvar self = this\n\tdelete self._headers[name.toLowerCase()]\n}\n\nClientRequest.prototype._onFinish = function () {\n\tvar self = this\n\n\tif (self._destroyed)\n\t\treturn\n\tvar opts = self._opts\n\n\tvar headersObj = self._headers\n\tvar body\n\tif (opts.method === 'POST' || opts.method === 'PUT') {\n\t\tif (capability.blobConstructor) {\n\t\t\tbody = new global.Blob(self._body.map(function (buffer) {\n\t\t\t\treturn buffer.toArrayBuffer()\n\t\t\t}), {\n\t\t\t\ttype: (headersObj['content-type'] || {}).value || ''\n\t\t\t})\n\t\t} else {\n\t\t\t// get utf8 string\n\t\t\tbody = Buffer.concat(self._body).toString()\n\t\t}\n\t}\n\n\tif (self._mode === 'fetch') {\n\t\tvar headers = keys(headersObj).map(function (name) {\n\t\t\treturn [headersObj[name].name, headersObj[name].value]\n\t\t})\n\n\t\tglobal.fetch(self._opts.url, {\n\t\t\tmethod: self._opts.method,\n\t\t\theaders: headers,\n\t\t\tbody: body,\n\t\t\tmode: 'cors',\n\t\t\tcredentials: opts.withCredentials ? 'include' : 'same-origin'\n\t\t}).then(function (response) {\n\t\t\tself._fetchResponse = response\n\t\t\tself._connect()\n\t\t}).then(undefined, function (reason) {\n\t\t\tself.emit('error', reason)\n\t\t})\n\t} else {\n\t\tvar xhr = self._xhr = new global.XMLHttpRequest()\n\t\ttry {\n\t\t\txhr.open(self._opts.method, self._opts.url, true)\n\t\t} catch (err) {\n\t\t\tprocess.nextTick(function () {\n\t\t\t\tself.emit('error', err)\n\t\t\t})\n\t\t\treturn\n\t\t}\n\n\t\t// Can't set responseType on really old browsers\n\t\tif ('responseType' in xhr)\n\t\t\txhr.responseType = self._mode.split(':')[0]\n\n\t\tif ('withCredentials' in xhr)\n\t\t\txhr.withCredentials = !!opts.withCredentials\n\n\t\tif (self._mode === 'text' && 'overrideMimeType' in xhr)\n\t\t\txhr.overrideMimeType('text/plain; charset=x-user-defined')\n\n\t\tforeach(keys(headersObj), function (name) {\n\t\t\txhr.setRequestHeader(headersObj[name].name, headersObj[name].value)\n\t\t})\n\n\t\tself._response = null\n\t\txhr.onreadystatechange = function () {\n\t\t\tswitch (xhr.readyState) {\n\t\t\t\tcase rStates.LOADING:\n\t\t\t\tcase rStates.DONE:\n\t\t\t\t\tself._onXHRProgress()\n\t\t\t\t\tbreak\n\t\t\t}\n\t\t}\n\t\t// Necessary for streaming in Firefox, since xhr.response is ONLY defined\n\t\t// in onprogress, not in onreadystatechange with xhr.readyState = 3\n\t\tif (self._mode === 'moz-chunked-arraybuffer') {\n\t\t\txhr.onprogress = function () {\n\t\t\t\tself._onXHRProgress()\n\t\t\t}\n\t\t}\n\n\t\txhr.onerror = function () {\n\t\t\tif (self._destroyed)\n\t\t\t\treturn\n\t\t\tself.emit('error', new Error('XHR error'))\n\t\t}\n\n\t\ttry {\n\t\t\txhr.send(body)\n\t\t} catch (err) {\n\t\t\tprocess.nextTick(function () {\n\t\t\t\tself.emit('error', err)\n\t\t\t})\n\t\t\treturn\n\t\t}\n\t}\n}\n\n/**\n * Checks if xhr.status is readable. Even though the spec says it should\n * be available in readyState 3, accessing it throws an exception in IE8\n */\nfunction statusValid (xhr) {\n\ttry {\n\t\treturn (xhr.status !== null)\n\t} catch (e) {\n\t\treturn false\n\t}\n}\n\nClientRequest.prototype._onXHRProgress = function () {\n\tvar self = this\n\n\tif (!statusValid(self._xhr) || self._destroyed)\n\t\treturn\n\n\tif (!self._response)\n\t\tself._connect()\n\n\tself._response._onXHRProgress()\n}\n\nClientRequest.prototype._connect = function () {\n\tvar self = this\n\n\tif (self._destroyed)\n\t\treturn\n\n\tself._response = new IncomingMessage(self._xhr, self._fetchResponse, self._mode)\n\tself.emit('response', self._response)\n}\n\nClientRequest.prototype._write = function (chunk, encoding, cb) {\n\tvar self = this\n\n\tself._body.push(chunk)\n\tcb()\n}\n\nClientRequest.prototype.abort = ClientRequest.prototype.destroy = function () {\n\tvar self = this\n\tself._destroyed = true\n\tif (self._response)\n\t\tself._response._destroyed = true\n\tif (self._xhr)\n\t\tself._xhr.abort()\n\t// Currently, there isn't a way to truly abort a fetch.\n\t// If you like bikeshedding, see https://github.com/whatwg/fetch/issues/27\n}\n\nClientRequest.prototype.end = function (data, encoding, cb) {\n\tvar self = this\n\tif (typeof data === 'function') {\n\t\tcb = data\n\t\tdata = undefined\n\t}\n\n\tstream.Writable.prototype.end.call(self, data, encoding, cb)\n}\n\nClientRequest.prototype.flushHeaders = function () {}\nClientRequest.prototype.setTimeout = function () {}\nClientRequest.prototype.setNoDelay = function () {}\nClientRequest.prototype.setSocketKeepAlive = function () {}\n\n// Taken from http://www.w3.org/TR/XMLHttpRequest/#the-setrequestheader%28%29-method\nvar unsafeHeaders = [\n\t'accept-charset',\n\t'accept-encoding',\n\t'access-control-request-headers',\n\t'access-control-request-method',\n\t'connection',\n\t'content-length',\n\t'cookie',\n\t'cookie2',\n\t'date',\n\t'dnt',\n\t'expect',\n\t'host',\n\t'keep-alive',\n\t'origin',\n\t'referer',\n\t'te',\n\t'trailer',\n\t'transfer-encoding',\n\t'upgrade',\n\t'user-agent',\n\t'via'\n]\n",
-    "var capability = require('./capability')\nvar foreach = require('foreach')\nvar inherits = require('inherits')\nvar stream = require('stream')\n\nvar rStates = exports.readyStates = {\n\tUNSENT: 0,\n\tOPENED: 1,\n\tHEADERS_RECEIVED: 2,\n\tLOADING: 3,\n\tDONE: 4\n}\n\nvar IncomingMessage = exports.IncomingMessage = function (xhr, response, mode) {\n\tvar self = this\n\tstream.Readable.call(self)\n\n\tself._mode = mode\n\tself.headers = {}\n\tself.rawHeaders = []\n\tself.trailers = {}\n\tself.rawTrailers = []\n\n\t// Fake the 'close' event, but only once 'end' fires\n\tself.on('end', function () {\n\t\t// The nextTick is necessary to prevent the 'request' module from causing an infinite loop\n\t\tprocess.nextTick(function () {\n\t\t\tself.emit('close')\n\t\t})\n\t})\n\n\tif (mode === 'fetch') {\n\t\tself._fetchResponse = response\n\n\t\tself.statusCode = response.status\n\t\tself.statusMessage = response.statusText\n\t\t// backwards compatible version of for (<item> of <iterable>):\n\t\t// for (var <item>,_i,_it = <iterable>[Symbol.iterator](); <item> = (_i = _it.next()).value,!_i.done;)\n\t\tfor (var header, _i, _it = response.headers[Symbol.iterator](); header = (_i = _it.next()).value, !_i.done;) {\n\t\t\tself.headers[header[0].toLowerCase()] = header[1]\n\t\t\tself.rawHeaders.push(header[0], header[1])\n\t\t}\n\n\t\t// TODO: this doesn't respect backpressure. Once WritableStream is available, this can be fixed\n\t\tvar reader = response.body.getReader()\n\t\tfunction read () {\n\t\t\treader.read().then(function (result) {\n\t\t\t\tif (self._destroyed)\n\t\t\t\t\treturn\n\t\t\t\tif (result.done) {\n\t\t\t\t\tself.push(null)\n\t\t\t\t\treturn\n\t\t\t\t}\n\t\t\t\tself.push(new Buffer(result.value))\n\t\t\t\tread()\n\t\t\t})\n\t\t}\n\t\tread()\n\n\t} else {\n\t\tself._xhr = xhr\n\t\tself._pos = 0\n\n\t\tself.statusCode = xhr.status\n\t\tself.statusMessage = xhr.statusText\n\t\tvar headers = xhr.getAllResponseHeaders().split(/\\r?\\n/)\n\t\tforeach(headers, function (header) {\n\t\t\tvar matches = header.match(/^([^:]+):\\s*(.*)/)\n\t\t\tif (matches) {\n\t\t\t\tvar key = matches[1].toLowerCase()\n\t\t\t\tif (self.headers[key] !== undefined)\n\t\t\t\t\tself.headers[key] += ', ' + matches[2]\n\t\t\t\telse\n\t\t\t\t\tself.headers[key] = matches[2]\n\t\t\t\tself.rawHeaders.push(matches[1], matches[2])\n\t\t\t}\n\t\t})\n\n\t\tself._charset = 'x-user-defined'\n\t\tif (!capability.overrideMimeType) {\n\t\t\tvar mimeType = self.rawHeaders['mime-type']\n\t\t\tif (mimeType) {\n\t\t\t\tvar charsetMatch = mimeType.match(/;\\s*charset=([^;])(;|$)/)\n\t\t\t\tif (charsetMatch) {\n\t\t\t\t\tself._charset = charsetMatch[1].toLowerCase()\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (!self._charset)\n\t\t\t\tself._charset = 'utf-8' // best guess\n\t\t}\n\t}\n}\n\ninherits(IncomingMessage, stream.Readable)\n\nIncomingMessage.prototype._read = function () {}\n\nIncomingMessage.prototype._onXHRProgress = function () {\n\tvar self = this\n\n\tvar xhr = self._xhr\n\n\tvar response = null\n\tswitch (self._mode) {\n\t\tcase 'text:vbarray': // For IE9\n\t\t\tif (xhr.readyState !== rStates.DONE)\n\t\t\t\tbreak\n\t\t\ttry {\n\t\t\t\t// This fails in IE8\n\t\t\t\tresponse = new global.VBArray(xhr.responseBody).toArray()\n\t\t\t} catch (e) {}\n\t\t\tif (response !== null) {\n\t\t\t\tself.push(new Buffer(response))\n\t\t\t\tbreak\n\t\t\t}\n\t\t\t// Falls through in IE8\t\n\t\tcase 'text':\n\t\t\ttry { // This will fail when readyState = 3 in IE9. Switch mode and wait for readyState = 4\n\t\t\t\tresponse = xhr.responseText\n\t\t\t} catch (e) {\n\t\t\t\tself._mode = 'text:vbarray'\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tif (response.length > self._pos) {\n\t\t\t\tvar newData = response.substr(self._pos)\n\t\t\t\tif (self._charset === 'x-user-defined') {\n\t\t\t\t\tvar buffer = new Buffer(newData.length)\n\t\t\t\t\tfor (var i = 0; i < newData.length; i++)\n\t\t\t\t\t\tbuffer[i] = newData.charCodeAt(i) & 0xff\n\n\t\t\t\t\tself.push(buffer)\n\t\t\t\t} else {\n\t\t\t\t\tself.push(newData, self._charset)\n\t\t\t\t}\n\t\t\t\tself._pos = response.length\n\t\t\t}\n\t\t\tbreak\n\t\tcase 'arraybuffer':\n\t\t\tif (xhr.readyState !== rStates.DONE)\n\t\t\t\tbreak\n\t\t\tresponse = xhr.response\n\t\t\tself.push(new Buffer(new Uint8Array(response)))\n\t\t\tbreak\n\t\tcase 'moz-chunked-arraybuffer': // take whole\n\t\t\tresponse = xhr.response\n\t\t\tif (xhr.readyState !== rStates.LOADING || !response)\n\t\t\t\tbreak\n\t\t\tself.push(new Buffer(new Uint8Array(response)))\n\t\t\tbreak\n\t\tcase 'ms-stream':\n\t\t\tresponse = xhr.response\n\t\t\tif (xhr.readyState !== rStates.LOADING)\n\t\t\t\tbreak\n\t\t\tvar reader = new global.MSStreamReader()\n\t\t\treader.onprogress = function () {\n\t\t\t\tif (reader.result.byteLength > self._pos) {\n\t\t\t\t\tself.push(new Buffer(new Uint8Array(reader.result.slice(self._pos))))\n\t\t\t\t\tself._pos = reader.result.byteLength\n\t\t\t\t}\n\t\t\t}\n\t\t\treader.onload = function () {\n\t\t\t\tself.push(null)\n\t\t\t}\n\t\t\t// reader.onerror = ??? // TODO: this\n\t\t\treader.readAsArrayBuffer(response)\n\t\t\tbreak\n\t}\n\n\t// The ms-stream case handles end separately in reader.onload()\n\tif (self._xhr.readyState === rStates.DONE && self._mode !== 'ms-stream') {\n\t\tself.push(null)\n\t}\n}\n",
-    "'use strict';\n\n// modified from https://github.com/es-shims/es5-shim\nvar has = Object.prototype.hasOwnProperty;\nvar toStr = Object.prototype.toString;\nvar slice = Array.prototype.slice;\nvar isArgs = require('./isArguments');\nvar hasDontEnumBug = !({ toString: null }).propertyIsEnumerable('toString');\nvar hasProtoEnumBug = function () {}.propertyIsEnumerable('prototype');\nvar dontEnums = [\n\t'toString',\n\t'toLocaleString',\n\t'valueOf',\n\t'hasOwnProperty',\n\t'isPrototypeOf',\n\t'propertyIsEnumerable',\n\t'constructor'\n];\nvar equalsConstructorPrototype = function (o) {\n\tvar ctor = o.constructor;\n\treturn ctor && ctor.prototype === o;\n};\nvar blacklistedKeys = {\n\t$console: true,\n\t$frame: true,\n\t$frameElement: true,\n\t$frames: true,\n\t$parent: true,\n\t$self: true,\n\t$webkitIndexedDB: true,\n\t$webkitStorageInfo: true,\n\t$window: true\n};\nvar hasAutomationEqualityBug = (function () {\n\t/* global window */\n\tif (typeof window === 'undefined') { return false; }\n\tfor (var k in window) {\n\t\ttry {\n\t\t\tif (!blacklistedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {\n\t\t\t\ttry {\n\t\t\t\t\tequalsConstructorPrototype(window[k]);\n\t\t\t\t} catch (e) {\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t} catch (e) {\n\t\t\treturn true;\n\t\t}\n\t}\n\treturn false;\n}());\nvar equalsConstructorPrototypeIfNotBuggy = function (o) {\n\t/* global window */\n\tif (typeof window === 'undefined' || !hasAutomationEqualityBug) {\n\t\treturn equalsConstructorPrototype(o);\n\t}\n\ttry {\n\t\treturn equalsConstructorPrototype(o);\n\t} catch (e) {\n\t\treturn false;\n\t}\n};\n\nvar keysShim = function keys(object) {\n\tvar isObject = object !== null && typeof object === 'object';\n\tvar isFunction = toStr.call(object) === '[object Function]';\n\tvar isArguments = isArgs(object);\n\tvar isString = isObject && toStr.call(object) === '[object String]';\n\tvar theKeys = [];\n\n\tif (!isObject && !isFunction && !isArguments) {\n\t\tthrow new TypeError('Object.keys called on a non-object');\n\t}\n\n\tvar skipProto = hasProtoEnumBug && isFunction;\n\tif (isString && object.length > 0 && !has.call(object, 0)) {\n\t\tfor (var i = 0; i < object.length; ++i) {\n\t\t\ttheKeys.push(String(i));\n\t\t}\n\t}\n\n\tif (isArguments && object.length > 0) {\n\t\tfor (var j = 0; j < object.length; ++j) {\n\t\t\ttheKeys.push(String(j));\n\t\t}\n\t} else {\n\t\tfor (var name in object) {\n\t\t\tif (!(skipProto && name === 'prototype') && has.call(object, name)) {\n\t\t\t\ttheKeys.push(String(name));\n\t\t\t}\n\t\t}\n\t}\n\n\tif (hasDontEnumBug) {\n\t\tvar skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);\n\n\t\tfor (var k = 0; k < dontEnums.length; ++k) {\n\t\t\tif (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {\n\t\t\t\ttheKeys.push(dontEnums[k]);\n\t\t\t}\n\t\t}\n\t}\n\treturn theKeys;\n};\n\nkeysShim.shim = function shimObjectKeys() {\n\tif (Object.keys) {\n\t\tvar keysWorksWithArguments = (function () {\n\t\t\t// Safari 5.0 bug\n\t\t\treturn (Object.keys(arguments) || '').length === 2;\n\t\t}(1, 2));\n\t\tif (!keysWorksWithArguments) {\n\t\t\tvar originalKeys = Object.keys;\n\t\t\tObject.keys = function keys(object) {\n\t\t\t\tif (isArgs(object)) {\n\t\t\t\t\treturn originalKeys(slice.call(object));\n\t\t\t\t} else {\n\t\t\t\t\treturn originalKeys(object);\n\t\t\t\t}\n\t\t\t};\n\t\t}\n\t} else {\n\t\tObject.keys = keysShim;\n\t}\n\treturn Object.keys || keysShim;\n};\n\nmodule.exports = keysShim;\n",
-    "'use strict';\n\nvar toStr = Object.prototype.toString;\n\nmodule.exports = function isArguments(value) {\n\tvar str = toStr.call(value);\n\tvar isArgs = str === '[object Arguments]';\n\tif (!isArgs) {\n\t\tisArgs = str !== '[object Array]' &&\n\t\t\tvalue !== null &&\n\t\t\ttypeof value === 'object' &&\n\t\t\ttypeof value.length === 'number' &&\n\t\t\tvalue.length >= 0 &&\n\t\t\ttoStr.call(value.callee) === '[object Function]';\n\t}\n\treturn isArgs;\n};\n",
+    "// var Base64 = require('Base64')\nvar capability = require('./capability')\nvar inherits = require('inherits')\nvar response = require('./response')\nvar stream = require('stream')\n\nvar IncomingMessage = response.IncomingMessage\nvar rStates = response.readyStates\n\nfunction decideMode (preferBinary) {\n\tif (capability.fetch) {\n\t\treturn 'fetch'\n\t} else if (capability.mozchunkedarraybuffer) {\n\t\treturn 'moz-chunked-arraybuffer'\n\t} else if (capability.msstream) {\n\t\treturn 'ms-stream'\n\t} else if (capability.arraybuffer && preferBinary) {\n\t\treturn 'arraybuffer'\n\t} else if (capability.vbArray && preferBinary) {\n\t\treturn 'text:vbarray'\n\t} else {\n\t\treturn 'text'\n\t}\n}\n\nvar ClientRequest = module.exports = function (opts) {\n\tvar self = this\n\tstream.Writable.call(self)\n\n\tself._opts = opts\n\tself._body = []\n\tself._headers = {}\n\tif (opts.auth)\n\t\tself.setHeader('Authorization', 'Basic ' + new Buffer(opts.auth).toString('base64'))\n\tObject.keys(opts.headers).forEach(function (name) {\n\t\tself.setHeader(name, opts.headers[name])\n\t})\n\n\tvar preferBinary\n\tif (opts.mode === 'prefer-streaming') {\n\t\t// If streaming is a high priority but binary compatibility and\n\t\t// the accuracy of the 'content-type' header aren't\n\t\tpreferBinary = false\n\t} else if (opts.mode === 'allow-wrong-content-type') {\n\t\t// If streaming is more important than preserving the 'content-type' header\n\t\tpreferBinary = !capability.overrideMimeType\n\t} else if (!opts.mode || opts.mode === 'default' || opts.mode === 'prefer-fast') {\n\t\t// Use binary if text streaming may corrupt data or the content-type header, or for speed\n\t\tpreferBinary = true\n\t} else {\n\t\tthrow new Error('Invalid value for opts.mode')\n\t}\n\tself._mode = decideMode(preferBinary)\n\n\tself.on('finish', function () {\n\t\tself._onFinish()\n\t})\n}\n\ninherits(ClientRequest, stream.Writable)\n\nClientRequest.prototype.setHeader = function (name, value) {\n\tvar self = this\n\tvar lowerName = name.toLowerCase()\n\t// This check is not necessary, but it prevents warnings from browsers about setting unsafe\n\t// headers. To be honest I'm not entirely sure hiding these warnings is a good thing, but\n\t// http-browserify did it, so I will too.\n\tif (unsafeHeaders.indexOf(lowerName) !== -1)\n\t\treturn\n\n\tself._headers[lowerName] = {\n\t\tname: name,\n\t\tvalue: value\n\t}\n}\n\nClientRequest.prototype.getHeader = function (name) {\n\tvar self = this\n\treturn self._headers[name.toLowerCase()].value\n}\n\nClientRequest.prototype.removeHeader = function (name) {\n\tvar self = this\n\tdelete self._headers[name.toLowerCase()]\n}\n\nClientRequest.prototype._onFinish = function () {\n\tvar self = this\n\n\tif (self._destroyed)\n\t\treturn\n\tvar opts = self._opts\n\n\tvar headersObj = self._headers\n\tvar body\n\tif (opts.method === 'POST' || opts.method === 'PUT' || opts.method === 'PATCH') {\n\t\tif (capability.blobConstructor) {\n\t\t\tbody = new global.Blob(self._body.map(function (buffer) {\n\t\t\t\treturn buffer.toArrayBuffer()\n\t\t\t}), {\n\t\t\t\ttype: (headersObj['content-type'] || {}).value || ''\n\t\t\t})\n\t\t} else {\n\t\t\t// get utf8 string\n\t\t\tbody = Buffer.concat(self._body).toString()\n\t\t}\n\t}\n\n\tif (self._mode === 'fetch') {\n\t\tvar headers = Object.keys(headersObj).map(function (name) {\n\t\t\treturn [headersObj[name].name, headersObj[name].value]\n\t\t})\n\n\t\tglobal.fetch(self._opts.url, {\n\t\t\tmethod: self._opts.method,\n\t\t\theaders: headers,\n\t\t\tbody: body,\n\t\t\tmode: 'cors',\n\t\t\tcredentials: opts.withCredentials ? 'include' : 'same-origin'\n\t\t}).then(function (response) {\n\t\t\tself._fetchResponse = response\n\t\t\tself._connect()\n\t\t}, function (reason) {\n\t\t\tself.emit('error', reason)\n\t\t})\n\t} else {\n\t\tvar xhr = self._xhr = new global.XMLHttpRequest()\n\t\ttry {\n\t\t\txhr.open(self._opts.method, self._opts.url, true)\n\t\t} catch (err) {\n\t\t\tprocess.nextTick(function () {\n\t\t\t\tself.emit('error', err)\n\t\t\t})\n\t\t\treturn\n\t\t}\n\n\t\t// Can't set responseType on really old browsers\n\t\tif ('responseType' in xhr)\n\t\t\txhr.responseType = self._mode.split(':')[0]\n\n\t\tif ('withCredentials' in xhr)\n\t\t\txhr.withCredentials = !!opts.withCredentials\n\n\t\tif (self._mode === 'text' && 'overrideMimeType' in xhr)\n\t\t\txhr.overrideMimeType('text/plain; charset=x-user-defined')\n\n\t\tObject.keys(headersObj).forEach(function (name) {\n\t\t\txhr.setRequestHeader(headersObj[name].name, headersObj[name].value)\n\t\t})\n\n\t\tself._response = null\n\t\txhr.onreadystatechange = function () {\n\t\t\tswitch (xhr.readyState) {\n\t\t\t\tcase rStates.LOADING:\n\t\t\t\tcase rStates.DONE:\n\t\t\t\t\tself._onXHRProgress()\n\t\t\t\t\tbreak\n\t\t\t}\n\t\t}\n\t\t// Necessary for streaming in Firefox, since xhr.response is ONLY defined\n\t\t// in onprogress, not in onreadystatechange with xhr.readyState = 3\n\t\tif (self._mode === 'moz-chunked-arraybuffer') {\n\t\t\txhr.onprogress = function () {\n\t\t\t\tself._onXHRProgress()\n\t\t\t}\n\t\t}\n\n\t\txhr.onerror = function () {\n\t\t\tif (self._destroyed)\n\t\t\t\treturn\n\t\t\tself.emit('error', new Error('XHR error'))\n\t\t}\n\n\t\ttry {\n\t\t\txhr.send(body)\n\t\t} catch (err) {\n\t\t\tprocess.nextTick(function () {\n\t\t\t\tself.emit('error', err)\n\t\t\t})\n\t\t\treturn\n\t\t}\n\t}\n}\n\n/**\n * Checks if xhr.status is readable. Even though the spec says it should\n * be available in readyState 3, accessing it throws an exception in IE8\n */\nfunction statusValid (xhr) {\n\ttry {\n\t\treturn (xhr.status !== null)\n\t} catch (e) {\n\t\treturn false\n\t}\n}\n\nClientRequest.prototype._onXHRProgress = function () {\n\tvar self = this\n\n\tif (!statusValid(self._xhr) || self._destroyed)\n\t\treturn\n\n\tif (!self._response)\n\t\tself._connect()\n\n\tself._response._onXHRProgress()\n}\n\nClientRequest.prototype._connect = function () {\n\tvar self = this\n\n\tif (self._destroyed)\n\t\treturn\n\n\tself._response = new IncomingMessage(self._xhr, self._fetchResponse, self._mode)\n\tself.emit('response', self._response)\n}\n\nClientRequest.prototype._write = function (chunk, encoding, cb) {\n\tvar self = this\n\n\tself._body.push(chunk)\n\tcb()\n}\n\nClientRequest.prototype.abort = ClientRequest.prototype.destroy = function () {\n\tvar self = this\n\tself._destroyed = true\n\tif (self._response)\n\t\tself._response._destroyed = true\n\tif (self._xhr)\n\t\tself._xhr.abort()\n\t// Currently, there isn't a way to truly abort a fetch.\n\t// If you like bikeshedding, see https://github.com/whatwg/fetch/issues/27\n}\n\nClientRequest.prototype.end = function (data, encoding, cb) {\n\tvar self = this\n\tif (typeof data === 'function') {\n\t\tcb = data\n\t\tdata = undefined\n\t}\n\n\tstream.Writable.prototype.end.call(self, data, encoding, cb)\n}\n\nClientRequest.prototype.flushHeaders = function () {}\nClientRequest.prototype.setTimeout = function () {}\nClientRequest.prototype.setNoDelay = function () {}\nClientRequest.prototype.setSocketKeepAlive = function () {}\n\n// Taken from http://www.w3.org/TR/XMLHttpRequest/#the-setrequestheader%28%29-method\nvar unsafeHeaders = [\n\t'accept-charset',\n\t'accept-encoding',\n\t'access-control-request-headers',\n\t'access-control-request-method',\n\t'connection',\n\t'content-length',\n\t'cookie',\n\t'cookie2',\n\t'date',\n\t'dnt',\n\t'expect',\n\t'host',\n\t'keep-alive',\n\t'origin',\n\t'referer',\n\t'te',\n\t'trailer',\n\t'transfer-encoding',\n\t'upgrade',\n\t'user-agent',\n\t'via'\n]\n",
+    "var capability = require('./capability')\nvar inherits = require('inherits')\nvar stream = require('stream')\n\nvar rStates = exports.readyStates = {\n\tUNSENT: 0,\n\tOPENED: 1,\n\tHEADERS_RECEIVED: 2,\n\tLOADING: 3,\n\tDONE: 4\n}\n\nvar IncomingMessage = exports.IncomingMessage = function (xhr, response, mode) {\n\tvar self = this\n\tstream.Readable.call(self)\n\n\tself._mode = mode\n\tself.headers = {}\n\tself.rawHeaders = []\n\tself.trailers = {}\n\tself.rawTrailers = []\n\n\t// Fake the 'close' event, but only once 'end' fires\n\tself.on('end', function () {\n\t\t// The nextTick is necessary to prevent the 'request' module from causing an infinite loop\n\t\tprocess.nextTick(function () {\n\t\t\tself.emit('close')\n\t\t})\n\t})\n\n\tif (mode === 'fetch') {\n\t\tself._fetchResponse = response\n\n\t\tself.statusCode = response.status\n\t\tself.statusMessage = response.statusText\n\t\t// backwards compatible version of for (<item> of <iterable>):\n\t\t// for (var <item>,_i,_it = <iterable>[Symbol.iterator](); <item> = (_i = _it.next()).value,!_i.done;)\n\t\tfor (var header, _i, _it = response.headers[Symbol.iterator](); header = (_i = _it.next()).value, !_i.done;) {\n\t\t\tself.headers[header[0].toLowerCase()] = header[1]\n\t\t\tself.rawHeaders.push(header[0], header[1])\n\t\t}\n\n\t\t// TODO: this doesn't respect backpressure. Once WritableStream is available, this can be fixed\n\t\tvar reader = response.body.getReader()\n\t\tfunction read () {\n\t\t\treader.read().then(function (result) {\n\t\t\t\tif (self._destroyed)\n\t\t\t\t\treturn\n\t\t\t\tif (result.done) {\n\t\t\t\t\tself.push(null)\n\t\t\t\t\treturn\n\t\t\t\t}\n\t\t\t\tself.push(new Buffer(result.value))\n\t\t\t\tread()\n\t\t\t})\n\t\t}\n\t\tread()\n\n\t} else {\n\t\tself._xhr = xhr\n\t\tself._pos = 0\n\n\t\tself.statusCode = xhr.status\n\t\tself.statusMessage = xhr.statusText\n\t\tvar headers = xhr.getAllResponseHeaders().split(/\\r?\\n/)\n\t\theaders.forEach(function (header) {\n\t\t\tvar matches = header.match(/^([^:]+):\\s*(.*)/)\n\t\t\tif (matches) {\n\t\t\t\tvar key = matches[1].toLowerCase()\n\t\t\t\tif (self.headers[key] !== undefined)\n\t\t\t\t\tself.headers[key] += ', ' + matches[2]\n\t\t\t\telse\n\t\t\t\t\tself.headers[key] = matches[2]\n\t\t\t\tself.rawHeaders.push(matches[1], matches[2])\n\t\t\t}\n\t\t})\n\n\t\tself._charset = 'x-user-defined'\n\t\tif (!capability.overrideMimeType) {\n\t\t\tvar mimeType = self.rawHeaders['mime-type']\n\t\t\tif (mimeType) {\n\t\t\t\tvar charsetMatch = mimeType.match(/;\\s*charset=([^;])(;|$)/)\n\t\t\t\tif (charsetMatch) {\n\t\t\t\t\tself._charset = charsetMatch[1].toLowerCase()\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (!self._charset)\n\t\t\t\tself._charset = 'utf-8' // best guess\n\t\t}\n\t}\n}\n\ninherits(IncomingMessage, stream.Readable)\n\nIncomingMessage.prototype._read = function () {}\n\nIncomingMessage.prototype._onXHRProgress = function () {\n\tvar self = this\n\n\tvar xhr = self._xhr\n\n\tvar response = null\n\tswitch (self._mode) {\n\t\tcase 'text:vbarray': // For IE9\n\t\t\tif (xhr.readyState !== rStates.DONE)\n\t\t\t\tbreak\n\t\t\ttry {\n\t\t\t\t// This fails in IE8\n\t\t\t\tresponse = new global.VBArray(xhr.responseBody).toArray()\n\t\t\t} catch (e) {}\n\t\t\tif (response !== null) {\n\t\t\t\tself.push(new Buffer(response))\n\t\t\t\tbreak\n\t\t\t}\n\t\t\t// Falls through in IE8\t\n\t\tcase 'text':\n\t\t\ttry { // This will fail when readyState = 3 in IE9. Switch mode and wait for readyState = 4\n\t\t\t\tresponse = xhr.responseText\n\t\t\t} catch (e) {\n\t\t\t\tself._mode = 'text:vbarray'\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tif (response.length > self._pos) {\n\t\t\t\tvar newData = response.substr(self._pos)\n\t\t\t\tif (self._charset === 'x-user-defined') {\n\t\t\t\t\tvar buffer = new Buffer(newData.length)\n\t\t\t\t\tfor (var i = 0; i < newData.length; i++)\n\t\t\t\t\t\tbuffer[i] = newData.charCodeAt(i) & 0xff\n\n\t\t\t\t\tself.push(buffer)\n\t\t\t\t} else {\n\t\t\t\t\tself.push(newData, self._charset)\n\t\t\t\t}\n\t\t\t\tself._pos = response.length\n\t\t\t}\n\t\t\tbreak\n\t\tcase 'arraybuffer':\n\t\t\tif (xhr.readyState !== rStates.DONE)\n\t\t\t\tbreak\n\t\t\tresponse = xhr.response\n\t\t\tself.push(new Buffer(new Uint8Array(response)))\n\t\t\tbreak\n\t\tcase 'moz-chunked-arraybuffer': // take whole\n\t\t\tresponse = xhr.response\n\t\t\tif (xhr.readyState !== rStates.LOADING || !response)\n\t\t\t\tbreak\n\t\t\tself.push(new Buffer(new Uint8Array(response)))\n\t\t\tbreak\n\t\tcase 'ms-stream':\n\t\t\tresponse = xhr.response\n\t\t\tif (xhr.readyState !== rStates.LOADING)\n\t\t\t\tbreak\n\t\t\tvar reader = new global.MSStreamReader()\n\t\t\treader.onprogress = function () {\n\t\t\t\tif (reader.result.byteLength > self._pos) {\n\t\t\t\t\tself.push(new Buffer(new Uint8Array(reader.result.slice(self._pos))))\n\t\t\t\t\tself._pos = reader.result.byteLength\n\t\t\t\t}\n\t\t\t}\n\t\t\treader.onload = function () {\n\t\t\t\tself.push(null)\n\t\t\t}\n\t\t\t// reader.onerror = ??? // TODO: this\n\t\t\treader.readAsArrayBuffer(response)\n\t\t\tbreak\n\t}\n\n\t// The ms-stream case handles end separately in reader.onload()\n\tif (self._xhr.readyState === rStates.DONE && self._mode !== 'ms-stream') {\n\t\tself.push(null)\n\t}\n}\n",
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nvar Buffer = require('buffer').Buffer;\n\nvar isBufferEncoding = Buffer.isEncoding\n  || function(encoding) {\n       switch (encoding && encoding.toLowerCase()) {\n         case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true;\n         default: return false;\n       }\n     }\n\n\nfunction assertEncoding(encoding) {\n  if (encoding && !isBufferEncoding(encoding)) {\n    throw new Error('Unknown encoding: ' + encoding);\n  }\n}\n\n// StringDecoder provides an interface for efficiently splitting a series of\n// buffers into a series of JS strings without breaking apart multi-byte\n// characters. CESU-8 is handled as part of the UTF-8 encoding.\n//\n// @TODO Handling all encodings inside a single object makes it very difficult\n// to reason about this code, so it should be split up in the future.\n// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code\n// points as used by CESU-8.\nvar StringDecoder = exports.StringDecoder = function(encoding) {\n  this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, '');\n  assertEncoding(encoding);\n  switch (this.encoding) {\n    case 'utf8':\n      // CESU-8 represents each of Surrogate Pair by 3-bytes\n      this.surrogateSize = 3;\n      break;\n    case 'ucs2':\n    case 'utf16le':\n      // UTF-16 represents each of Surrogate Pair by 2-bytes\n      this.surrogateSize = 2;\n      this.detectIncompleteChar = utf16DetectIncompleteChar;\n      break;\n    case 'base64':\n      // Base-64 stores 3 bytes in 4 chars, and pads the remainder.\n      this.surrogateSize = 3;\n      this.detectIncompleteChar = base64DetectIncompleteChar;\n      break;\n    default:\n      this.write = passThroughWrite;\n      return;\n  }\n\n  // Enough space to store all bytes of a single character. UTF-8 needs 4\n  // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate).\n  this.charBuffer = new Buffer(6);\n  // Number of bytes received for the current incomplete multi-byte character.\n  this.charReceived = 0;\n  // Number of bytes expected for the current incomplete multi-byte character.\n  this.charLength = 0;\n};\n\n\n// write decodes the given buffer and returns it as JS string that is\n// guaranteed to not contain any partial multi-byte characters. Any partial\n// character found at the end of the buffer is buffered up, and will be\n// returned when calling write again with the remaining bytes.\n//\n// Note: Converting a Buffer containing an orphan surrogate to a String\n// currently works, but converting a String to a Buffer (via `new Buffer`, or\n// Buffer#write) will replace incomplete surrogates with the unicode\n// replacement character. See https://codereview.chromium.org/121173009/ .\nStringDecoder.prototype.write = function(buffer) {\n  var charStr = '';\n  // if our last write ended with an incomplete multibyte character\n  while (this.charLength) {\n    // determine how many remaining bytes this buffer has to offer for this char\n    var available = (buffer.length >= this.charLength - this.charReceived) ?\n        this.charLength - this.charReceived :\n        buffer.length;\n\n    // add the new bytes to the char buffer\n    buffer.copy(this.charBuffer, this.charReceived, 0, available);\n    this.charReceived += available;\n\n    if (this.charReceived < this.charLength) {\n      // still not enough chars in this buffer? wait for more ...\n      return '';\n    }\n\n    // remove bytes belonging to the current character from the buffer\n    buffer = buffer.slice(available, buffer.length);\n\n    // get the character that was split\n    charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding);\n\n    // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character\n    var charCode = charStr.charCodeAt(charStr.length - 1);\n    if (charCode >= 0xD800 && charCode <= 0xDBFF) {\n      this.charLength += this.surrogateSize;\n      charStr = '';\n      continue;\n    }\n    this.charReceived = this.charLength = 0;\n\n    // if there are no more bytes in this buffer, just emit our char\n    if (buffer.length === 0) {\n      return charStr;\n    }\n    break;\n  }\n\n  // determine and set charLength / charReceived\n  this.detectIncompleteChar(buffer);\n\n  var end = buffer.length;\n  if (this.charLength) {\n    // buffer the incomplete character bytes we got\n    buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end);\n    end -= this.charReceived;\n  }\n\n  charStr += buffer.toString(this.encoding, 0, end);\n\n  var end = charStr.length - 1;\n  var charCode = charStr.charCodeAt(end);\n  // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character\n  if (charCode >= 0xD800 && charCode <= 0xDBFF) {\n    var size = this.surrogateSize;\n    this.charLength += size;\n    this.charReceived += size;\n    this.charBuffer.copy(this.charBuffer, size, 0, size);\n    buffer.copy(this.charBuffer, 0, 0, size);\n    return charStr.substring(0, end);\n  }\n\n  // or just emit the charStr\n  return charStr;\n};\n\n// detectIncompleteChar determines if there is an incomplete UTF-8 character at\n// the end of the given buffer. If so, it sets this.charLength to the byte\n// length that character, and sets this.charReceived to the number of bytes\n// that are available for this character.\nStringDecoder.prototype.detectIncompleteChar = function(buffer) {\n  // determine how many bytes we have to check at the end of this buffer\n  var i = (buffer.length >= 3) ? 3 : buffer.length;\n\n  // Figure out if one of the last i bytes of our buffer announces an\n  // incomplete char.\n  for (; i > 0; i--) {\n    var c = buffer[buffer.length - i];\n\n    // See http://en.wikipedia.org/wiki/UTF-8#Description\n\n    // 110XXXXX\n    if (i == 1 && c >> 5 == 0x06) {\n      this.charLength = 2;\n      break;\n    }\n\n    // 1110XXXX\n    if (i <= 2 && c >> 4 == 0x0E) {\n      this.charLength = 3;\n      break;\n    }\n\n    // 11110XXX\n    if (i <= 3 && c >> 3 == 0x1E) {\n      this.charLength = 4;\n      break;\n    }\n  }\n  this.charReceived = i;\n};\n\nStringDecoder.prototype.end = function(buffer) {\n  var res = '';\n  if (buffer && buffer.length)\n    res = this.write(buffer);\n\n  if (this.charReceived) {\n    var cr = this.charReceived;\n    var buf = this.charBuffer;\n    var enc = this.encoding;\n    res += buf.slice(0, cr).toString(enc);\n  }\n\n  return res;\n};\n\nfunction passThroughWrite(buffer) {\n  return buffer.toString(this.encoding);\n}\n\nfunction utf16DetectIncompleteChar(buffer) {\n  this.charReceived = buffer.length % 2;\n  this.charLength = this.charReceived ? 2 : 0;\n}\n\nfunction base64DetectIncompleteChar(buffer) {\n  this.charReceived = buffer.length % 3;\n  this.charLength = this.charReceived ? 3 : 0;\n}\n",
-    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nvar punycode = require('punycode');\n\nexports.parse = urlParse;\nexports.resolve = urlResolve;\nexports.resolveObject = urlResolveObject;\nexports.format = urlFormat;\n\nexports.Url = Url;\n\nfunction Url() {\n  this.protocol = null;\n  this.slashes = null;\n  this.auth = null;\n  this.host = null;\n  this.port = null;\n  this.hostname = null;\n  this.hash = null;\n  this.search = null;\n  this.query = null;\n  this.pathname = null;\n  this.path = null;\n  this.href = null;\n}\n\n// Reference: RFC 3986, RFC 1808, RFC 2396\n\n// define these here so at least they only have to be\n// compiled once on the first module load.\nvar protocolPattern = /^([a-z0-9.+-]+:)/i,\n    portPattern = /:[0-9]*$/,\n\n    // RFC 2396: characters reserved for delimiting URLs.\n    // We actually just auto-escape these.\n    delims = ['<', '>', '\"', '`', ' ', '\\r', '\\n', '\\t'],\n\n    // RFC 2396: characters not allowed for various reasons.\n    unwise = ['{', '}', '|', '\\\\', '^', '`'].concat(delims),\n\n    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.\n    autoEscape = ['\\''].concat(unwise),\n    // Characters that are never ever allowed in a hostname.\n    // Note that any invalid chars are also handled, but these\n    // are the ones that are *expected* to be seen, so we fast-path\n    // them.\n    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),\n    hostEndingChars = ['/', '?', '#'],\n    hostnameMaxLen = 255,\n    hostnamePartPattern = /^[a-z0-9A-Z_-]{0,63}$/,\n    hostnamePartStart = /^([a-z0-9A-Z_-]{0,63})(.*)$/,\n    // protocols that can allow \"unsafe\" and \"unwise\" chars.\n    unsafeProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that never have a hostname.\n    hostlessProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that always contain a // bit.\n    slashedProtocol = {\n      'http': true,\n      'https': true,\n      'ftp': true,\n      'gopher': true,\n      'file': true,\n      'http:': true,\n      'https:': true,\n      'ftp:': true,\n      'gopher:': true,\n      'file:': true\n    },\n    querystring = require('querystring');\n\nfunction urlParse(url, parseQueryString, slashesDenoteHost) {\n  if (url && isObject(url) && url instanceof Url) return url;\n\n  var u = new Url;\n  u.parse(url, parseQueryString, slashesDenoteHost);\n  return u;\n}\n\nUrl.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {\n  if (!isString(url)) {\n    throw new TypeError(\"Parameter 'url' must be a string, not \" + typeof url);\n  }\n\n  var rest = url;\n\n  // trim before proceeding.\n  // This is to support parse stuff like \"  http://foo.com  \\n\"\n  rest = rest.trim();\n\n  var proto = protocolPattern.exec(rest);\n  if (proto) {\n    proto = proto[0];\n    var lowerProto = proto.toLowerCase();\n    this.protocol = lowerProto;\n    rest = rest.substr(proto.length);\n  }\n\n  // figure out if it's got a host\n  // user@server is *always* interpreted as a hostname, and url\n  // resolution will treat //foo/bar as host=foo,path=bar because that's\n  // how the browser resolves relative URLs.\n  if (slashesDenoteHost || proto || rest.match(/^\\/\\/[^@\\/]+@[^@\\/]+/)) {\n    var slashes = rest.substr(0, 2) === '//';\n    if (slashes && !(proto && hostlessProtocol[proto])) {\n      rest = rest.substr(2);\n      this.slashes = true;\n    }\n  }\n\n  if (!hostlessProtocol[proto] &&\n      (slashes || (proto && !slashedProtocol[proto]))) {\n\n    // there's a hostname.\n    // the first instance of /, ?, ;, or # ends the host.\n    //\n    // If there is an @ in the hostname, then non-host chars *are* allowed\n    // to the left of the last @ sign, unless some host-ending character\n    // comes *before* the @-sign.\n    // URLs are obnoxious.\n    //\n    // ex:\n    // http://a@b@c/ => user:a@b host:c\n    // http://a@b?@c => user:a host:c path:/?@c\n\n    // v0.12 TODO(isaacs): This is not quite how Chrome does things.\n    // Review our test case against browsers more comprehensively.\n\n    // find the first instance of any hostEndingChars\n    var hostEnd = -1;\n    for (var i = 0; i < hostEndingChars.length; i++) {\n      var hec = rest.indexOf(hostEndingChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n\n    // at this point, either we have an explicit point where the\n    // auth portion cannot go past, or the last @ char is the decider.\n    var auth, atSign;\n    if (hostEnd === -1) {\n      // atSign can be anywhere.\n      atSign = rest.lastIndexOf('@');\n    } else {\n      // atSign must be in auth portion.\n      // http://a@b/c@d => host:b auth:a path:/c@d\n      atSign = rest.lastIndexOf('@', hostEnd);\n    }\n\n    // Now we have a portion which is definitely the auth.\n    // Pull that off.\n    if (atSign !== -1) {\n      auth = rest.slice(0, atSign);\n      rest = rest.slice(atSign + 1);\n      this.auth = decodeURIComponent(auth);\n    }\n\n    // the host is the remaining to the left of the first non-host char\n    hostEnd = -1;\n    for (var i = 0; i < nonHostChars.length; i++) {\n      var hec = rest.indexOf(nonHostChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n    // if we still have not hit it, then the entire thing is a host.\n    if (hostEnd === -1)\n      hostEnd = rest.length;\n\n    this.host = rest.slice(0, hostEnd);\n    rest = rest.slice(hostEnd);\n\n    // pull out port.\n    this.parseHost();\n\n    // we've indicated that there is a hostname,\n    // so even if it's empty, it has to be present.\n    this.hostname = this.hostname || '';\n\n    // if hostname begins with [ and ends with ]\n    // assume that it's an IPv6 address.\n    var ipv6Hostname = this.hostname[0] === '[' &&\n        this.hostname[this.hostname.length - 1] === ']';\n\n    // validate a little.\n    if (!ipv6Hostname) {\n      var hostparts = this.hostname.split(/\\./);\n      for (var i = 0, l = hostparts.length; i < l; i++) {\n        var part = hostparts[i];\n        if (!part) continue;\n        if (!part.match(hostnamePartPattern)) {\n          var newpart = '';\n          for (var j = 0, k = part.length; j < k; j++) {\n            if (part.charCodeAt(j) > 127) {\n              // we replace non-ASCII char with a temporary placeholder\n              // we need this to make sure size of hostname is not\n              // broken by replacing non-ASCII by nothing\n              newpart += 'x';\n            } else {\n              newpart += part[j];\n            }\n          }\n          // we test again with ASCII char only\n          if (!newpart.match(hostnamePartPattern)) {\n            var validParts = hostparts.slice(0, i);\n            var notHost = hostparts.slice(i + 1);\n            var bit = part.match(hostnamePartStart);\n            if (bit) {\n              validParts.push(bit[1]);\n              notHost.unshift(bit[2]);\n            }\n            if (notHost.length) {\n              rest = '/' + notHost.join('.') + rest;\n            }\n            this.hostname = validParts.join('.');\n            break;\n          }\n        }\n      }\n    }\n\n    if (this.hostname.length > hostnameMaxLen) {\n      this.hostname = '';\n    } else {\n      // hostnames are always lower case.\n      this.hostname = this.hostname.toLowerCase();\n    }\n\n    if (!ipv6Hostname) {\n      // IDNA Support: Returns a puny coded representation of \"domain\".\n      // It only converts the part of the domain name that\n      // has non ASCII characters. I.e. it dosent matter if\n      // you call it with a domain that already is in ASCII.\n      var domainArray = this.hostname.split('.');\n      var newOut = [];\n      for (var i = 0; i < domainArray.length; ++i) {\n        var s = domainArray[i];\n        newOut.push(s.match(/[^A-Za-z0-9_-]/) ?\n            'xn--' + punycode.encode(s) : s);\n      }\n      this.hostname = newOut.join('.');\n    }\n\n    var p = this.port ? ':' + this.port : '';\n    var h = this.hostname || '';\n    this.host = h + p;\n    this.href += this.host;\n\n    // strip [ and ] from the hostname\n    // the host field still retains them, though\n    if (ipv6Hostname) {\n      this.hostname = this.hostname.substr(1, this.hostname.length - 2);\n      if (rest[0] !== '/') {\n        rest = '/' + rest;\n      }\n    }\n  }\n\n  // now rest is set to the post-host stuff.\n  // chop off any delim chars.\n  if (!unsafeProtocol[lowerProto]) {\n\n    // First, make 100% sure that any \"autoEscape\" chars get\n    // escaped, even if encodeURIComponent doesn't think they\n    // need to be.\n    for (var i = 0, l = autoEscape.length; i < l; i++) {\n      var ae = autoEscape[i];\n      var esc = encodeURIComponent(ae);\n      if (esc === ae) {\n        esc = escape(ae);\n      }\n      rest = rest.split(ae).join(esc);\n    }\n  }\n\n\n  // chop off from the tail first.\n  var hash = rest.indexOf('#');\n  if (hash !== -1) {\n    // got a fragment string.\n    this.hash = rest.substr(hash);\n    rest = rest.slice(0, hash);\n  }\n  var qm = rest.indexOf('?');\n  if (qm !== -1) {\n    this.search = rest.substr(qm);\n    this.query = rest.substr(qm + 1);\n    if (parseQueryString) {\n      this.query = querystring.parse(this.query);\n    }\n    rest = rest.slice(0, qm);\n  } else if (parseQueryString) {\n    // no query string, but parseQueryString still requested\n    this.search = '';\n    this.query = {};\n  }\n  if (rest) this.pathname = rest;\n  if (slashedProtocol[lowerProto] &&\n      this.hostname && !this.pathname) {\n    this.pathname = '/';\n  }\n\n  //to support http.request\n  if (this.pathname || this.search) {\n    var p = this.pathname || '';\n    var s = this.search || '';\n    this.path = p + s;\n  }\n\n  // finally, reconstruct the href based on what has been validated.\n  this.href = this.format();\n  return this;\n};\n\n// format a parsed object into a url string\nfunction urlFormat(obj) {\n  // ensure it's an object, and not a string url.\n  // If it's an obj, this is a no-op.\n  // this way, you can call url_format() on strings\n  // to clean up potentially wonky urls.\n  if (isString(obj)) obj = urlParse(obj);\n  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);\n  return obj.format();\n}\n\nUrl.prototype.format = function() {\n  var auth = this.auth || '';\n  if (auth) {\n    auth = encodeURIComponent(auth);\n    auth = auth.replace(/%3A/i, ':');\n    auth += '@';\n  }\n\n  var protocol = this.protocol || '',\n      pathname = this.pathname || '',\n      hash = this.hash || '',\n      host = false,\n      query = '';\n\n  if (this.host) {\n    host = auth + this.host;\n  } else if (this.hostname) {\n    host = auth + (this.hostname.indexOf(':') === -1 ?\n        this.hostname :\n        '[' + this.hostname + ']');\n    if (this.port) {\n      host += ':' + this.port;\n    }\n  }\n\n  if (this.query &&\n      isObject(this.query) &&\n      Object.keys(this.query).length) {\n    query = querystring.stringify(this.query);\n  }\n\n  var search = this.search || (query && ('?' + query)) || '';\n\n  if (protocol && protocol.substr(-1) !== ':') protocol += ':';\n\n  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.\n  // unless they had them to begin with.\n  if (this.slashes ||\n      (!protocol || slashedProtocol[protocol]) && host !== false) {\n    host = '//' + (host || '');\n    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;\n  } else if (!host) {\n    host = '';\n  }\n\n  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;\n  if (search && search.charAt(0) !== '?') search = '?' + search;\n\n  pathname = pathname.replace(/[?#]/g, function(match) {\n    return encodeURIComponent(match);\n  });\n  search = search.replace('#', '%23');\n\n  return protocol + host + pathname + search + hash;\n};\n\nfunction urlResolve(source, relative) {\n  return urlParse(source, false, true).resolve(relative);\n}\n\nUrl.prototype.resolve = function(relative) {\n  return this.resolveObject(urlParse(relative, false, true)).format();\n};\n\nfunction urlResolveObject(source, relative) {\n  if (!source) return relative;\n  return urlParse(source, false, true).resolveObject(relative);\n}\n\nUrl.prototype.resolveObject = function(relative) {\n  if (isString(relative)) {\n    var rel = new Url();\n    rel.parse(relative, false, true);\n    relative = rel;\n  }\n\n  var result = new Url();\n  Object.keys(this).forEach(function(k) {\n    result[k] = this[k];\n  }, this);\n\n  // hash is always overridden, no matter what.\n  // even href=\"\" will remove it.\n  result.hash = relative.hash;\n\n  // if the relative url is empty, then there's nothing left to do here.\n  if (relative.href === '') {\n    result.href = result.format();\n    return result;\n  }\n\n  // hrefs like //foo/bar always cut to the protocol.\n  if (relative.slashes && !relative.protocol) {\n    // take everything except the protocol from relative\n    Object.keys(relative).forEach(function(k) {\n      if (k !== 'protocol')\n        result[k] = relative[k];\n    });\n\n    //urlParse appends trailing / to urls like http://www.example.com\n    if (slashedProtocol[result.protocol] &&\n        result.hostname && !result.pathname) {\n      result.path = result.pathname = '/';\n    }\n\n    result.href = result.format();\n    return result;\n  }\n\n  if (relative.protocol && relative.protocol !== result.protocol) {\n    // if it's a known url protocol, then changing\n    // the protocol does weird things\n    // first, if it's not file:, then we MUST have a host,\n    // and if there was a path\n    // to begin with, then we MUST have a path.\n    // if it is file:, then the host is dropped,\n    // because that's known to be hostless.\n    // anything else is assumed to be absolute.\n    if (!slashedProtocol[relative.protocol]) {\n      Object.keys(relative).forEach(function(k) {\n        result[k] = relative[k];\n      });\n      result.href = result.format();\n      return result;\n    }\n\n    result.protocol = relative.protocol;\n    if (!relative.host && !hostlessProtocol[relative.protocol]) {\n      var relPath = (relative.pathname || '').split('/');\n      while (relPath.length && !(relative.host = relPath.shift()));\n      if (!relative.host) relative.host = '';\n      if (!relative.hostname) relative.hostname = '';\n      if (relPath[0] !== '') relPath.unshift('');\n      if (relPath.length < 2) relPath.unshift('');\n      result.pathname = relPath.join('/');\n    } else {\n      result.pathname = relative.pathname;\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    result.host = relative.host || '';\n    result.auth = relative.auth;\n    result.hostname = relative.hostname || relative.host;\n    result.port = relative.port;\n    // to support http.request\n    if (result.pathname || result.search) {\n      var p = result.pathname || '';\n      var s = result.search || '';\n      result.path = p + s;\n    }\n    result.slashes = result.slashes || relative.slashes;\n    result.href = result.format();\n    return result;\n  }\n\n  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),\n      isRelAbs = (\n          relative.host ||\n          relative.pathname && relative.pathname.charAt(0) === '/'\n      ),\n      mustEndAbs = (isRelAbs || isSourceAbs ||\n                    (result.host && relative.pathname)),\n      removeAllDots = mustEndAbs,\n      srcPath = result.pathname && result.pathname.split('/') || [],\n      relPath = relative.pathname && relative.pathname.split('/') || [],\n      psychotic = result.protocol && !slashedProtocol[result.protocol];\n\n  // if the url is a non-slashed url, then relative\n  // links like ../.. should be able\n  // to crawl up to the hostname, as well.  This is strange.\n  // result.protocol has already been set by now.\n  // Later on, put the first path part into the host field.\n  if (psychotic) {\n    result.hostname = '';\n    result.port = null;\n    if (result.host) {\n      if (srcPath[0] === '') srcPath[0] = result.host;\n      else srcPath.unshift(result.host);\n    }\n    result.host = '';\n    if (relative.protocol) {\n      relative.hostname = null;\n      relative.port = null;\n      if (relative.host) {\n        if (relPath[0] === '') relPath[0] = relative.host;\n        else relPath.unshift(relative.host);\n      }\n      relative.host = null;\n    }\n    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');\n  }\n\n  if (isRelAbs) {\n    // it's absolute.\n    result.host = (relative.host || relative.host === '') ?\n                  relative.host : result.host;\n    result.hostname = (relative.hostname || relative.hostname === '') ?\n                      relative.hostname : result.hostname;\n    result.search = relative.search;\n    result.query = relative.query;\n    srcPath = relPath;\n    // fall through to the dot-handling below.\n  } else if (relPath.length) {\n    // it's relative\n    // throw away the existing file, and take the new path instead.\n    if (!srcPath) srcPath = [];\n    srcPath.pop();\n    srcPath = srcPath.concat(relPath);\n    result.search = relative.search;\n    result.query = relative.query;\n  } else if (!isNullOrUndefined(relative.search)) {\n    // just pull out the search.\n    // like href='?foo'.\n    // Put this after the other two cases because it simplifies the booleans\n    if (psychotic) {\n      result.hostname = result.host = srcPath.shift();\n      //occationaly the auth can get stuck only in host\n      //this especialy happens in cases like\n      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n      var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                       result.host.split('@') : false;\n      if (authInHost) {\n        result.auth = authInHost.shift();\n        result.host = result.hostname = authInHost.shift();\n      }\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    //to support http.request\n    if (!isNull(result.pathname) || !isNull(result.search)) {\n      result.path = (result.pathname ? result.pathname : '') +\n                    (result.search ? result.search : '');\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  if (!srcPath.length) {\n    // no path at all.  easy.\n    // we've already handled the other stuff above.\n    result.pathname = null;\n    //to support http.request\n    if (result.search) {\n      result.path = '/' + result.search;\n    } else {\n      result.path = null;\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  // if a url ENDs in . or .., then it must get a trailing slash.\n  // however, if it ends in anything else non-slashy,\n  // then it must NOT get a trailing slash.\n  var last = srcPath.slice(-1)[0];\n  var hasTrailingSlash = (\n      (result.host || relative.host) && (last === '.' || last === '..') ||\n      last === '');\n\n  // strip single dots, resolve double dots to parent dir\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = srcPath.length; i >= 0; i--) {\n    last = srcPath[i];\n    if (last == '.') {\n      srcPath.splice(i, 1);\n    } else if (last === '..') {\n      srcPath.splice(i, 1);\n      up++;\n    } else if (up) {\n      srcPath.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (!mustEndAbs && !removeAllDots) {\n    for (; up--; up) {\n      srcPath.unshift('..');\n    }\n  }\n\n  if (mustEndAbs && srcPath[0] !== '' &&\n      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {\n    srcPath.unshift('');\n  }\n\n  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {\n    srcPath.push('');\n  }\n\n  var isAbsolute = srcPath[0] === '' ||\n      (srcPath[0] && srcPath[0].charAt(0) === '/');\n\n  // put the host back\n  if (psychotic) {\n    result.hostname = result.host = isAbsolute ? '' :\n                                    srcPath.length ? srcPath.shift() : '';\n    //occationaly the auth can get stuck only in host\n    //this especialy happens in cases like\n    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n    var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                     result.host.split('@') : false;\n    if (authInHost) {\n      result.auth = authInHost.shift();\n      result.host = result.hostname = authInHost.shift();\n    }\n  }\n\n  mustEndAbs = mustEndAbs || (result.host && srcPath.length);\n\n  if (mustEndAbs && !isAbsolute) {\n    srcPath.unshift('');\n  }\n\n  if (!srcPath.length) {\n    result.pathname = null;\n    result.path = null;\n  } else {\n    result.pathname = srcPath.join('/');\n  }\n\n  //to support request.http\n  if (!isNull(result.pathname) || !isNull(result.search)) {\n    result.path = (result.pathname ? result.pathname : '') +\n                  (result.search ? result.search : '');\n  }\n  result.auth = relative.auth || result.auth;\n  result.slashes = result.slashes || relative.slashes;\n  result.href = result.format();\n  return result;\n};\n\nUrl.prototype.parseHost = function() {\n  var host = this.host;\n  var port = portPattern.exec(host);\n  if (port) {\n    port = port[0];\n    if (port !== ':') {\n      this.port = port.substr(1);\n    }\n    host = host.substr(0, host.length - port.length);\n  }\n  if (host) this.hostname = host;\n};\n\nfunction isString(arg) {\n  return typeof arg === \"string\";\n}\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\n\nfunction isNull(arg) {\n  return arg === null;\n}\nfunction isNullOrUndefined(arg) {\n  return  arg == null;\n}\n",
+    "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\nvar punycode = require('punycode');\nvar util = require('./util');\n\nexports.parse = urlParse;\nexports.resolve = urlResolve;\nexports.resolveObject = urlResolveObject;\nexports.format = urlFormat;\n\nexports.Url = Url;\n\nfunction Url() {\n  this.protocol = null;\n  this.slashes = null;\n  this.auth = null;\n  this.host = null;\n  this.port = null;\n  this.hostname = null;\n  this.hash = null;\n  this.search = null;\n  this.query = null;\n  this.pathname = null;\n  this.path = null;\n  this.href = null;\n}\n\n// Reference: RFC 3986, RFC 1808, RFC 2396\n\n// define these here so at least they only have to be\n// compiled once on the first module load.\nvar protocolPattern = /^([a-z0-9.+-]+:)/i,\n    portPattern = /:[0-9]*$/,\n\n    // Special case for a simple path URL\n    simplePathPattern = /^(\\/\\/?(?!\\/)[^\\?\\s]*)(\\?[^\\s]*)?$/,\n\n    // RFC 2396: characters reserved for delimiting URLs.\n    // We actually just auto-escape these.\n    delims = ['<', '>', '\"', '`', ' ', '\\r', '\\n', '\\t'],\n\n    // RFC 2396: characters not allowed for various reasons.\n    unwise = ['{', '}', '|', '\\\\', '^', '`'].concat(delims),\n\n    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.\n    autoEscape = ['\\''].concat(unwise),\n    // Characters that are never ever allowed in a hostname.\n    // Note that any invalid chars are also handled, but these\n    // are the ones that are *expected* to be seen, so we fast-path\n    // them.\n    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),\n    hostEndingChars = ['/', '?', '#'],\n    hostnameMaxLen = 255,\n    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,\n    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,\n    // protocols that can allow \"unsafe\" and \"unwise\" chars.\n    unsafeProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that never have a hostname.\n    hostlessProtocol = {\n      'javascript': true,\n      'javascript:': true\n    },\n    // protocols that always contain a // bit.\n    slashedProtocol = {\n      'http': true,\n      'https': true,\n      'ftp': true,\n      'gopher': true,\n      'file': true,\n      'http:': true,\n      'https:': true,\n      'ftp:': true,\n      'gopher:': true,\n      'file:': true\n    },\n    querystring = require('querystring');\n\nfunction urlParse(url, parseQueryString, slashesDenoteHost) {\n  if (url && util.isObject(url) && url instanceof Url) return url;\n\n  var u = new Url;\n  u.parse(url, parseQueryString, slashesDenoteHost);\n  return u;\n}\n\nUrl.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {\n  if (!util.isString(url)) {\n    throw new TypeError(\"Parameter 'url' must be a string, not \" + typeof url);\n  }\n\n  // Copy chrome, IE, opera backslash-handling behavior.\n  // Back slashes before the query string get converted to forward slashes\n  // See: https://code.google.com/p/chromium/issues/detail?id=25916\n  var queryIndex = url.indexOf('?'),\n      splitter =\n          (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',\n      uSplit = url.split(splitter),\n      slashRegex = /\\\\/g;\n  uSplit[0] = uSplit[0].replace(slashRegex, '/');\n  url = uSplit.join(splitter);\n\n  var rest = url;\n\n  // trim before proceeding.\n  // This is to support parse stuff like \"  http://foo.com  \\n\"\n  rest = rest.trim();\n\n  if (!slashesDenoteHost && url.split('#').length === 1) {\n    // Try fast path regexp\n    var simplePath = simplePathPattern.exec(rest);\n    if (simplePath) {\n      this.path = rest;\n      this.href = rest;\n      this.pathname = simplePath[1];\n      if (simplePath[2]) {\n        this.search = simplePath[2];\n        if (parseQueryString) {\n          this.query = querystring.parse(this.search.substr(1));\n        } else {\n          this.query = this.search.substr(1);\n        }\n      } else if (parseQueryString) {\n        this.search = '';\n        this.query = {};\n      }\n      return this;\n    }\n  }\n\n  var proto = protocolPattern.exec(rest);\n  if (proto) {\n    proto = proto[0];\n    var lowerProto = proto.toLowerCase();\n    this.protocol = lowerProto;\n    rest = rest.substr(proto.length);\n  }\n\n  // figure out if it's got a host\n  // user@server is *always* interpreted as a hostname, and url\n  // resolution will treat //foo/bar as host=foo,path=bar because that's\n  // how the browser resolves relative URLs.\n  if (slashesDenoteHost || proto || rest.match(/^\\/\\/[^@\\/]+@[^@\\/]+/)) {\n    var slashes = rest.substr(0, 2) === '//';\n    if (slashes && !(proto && hostlessProtocol[proto])) {\n      rest = rest.substr(2);\n      this.slashes = true;\n    }\n  }\n\n  if (!hostlessProtocol[proto] &&\n      (slashes || (proto && !slashedProtocol[proto]))) {\n\n    // there's a hostname.\n    // the first instance of /, ?, ;, or # ends the host.\n    //\n    // If there is an @ in the hostname, then non-host chars *are* allowed\n    // to the left of the last @ sign, unless some host-ending character\n    // comes *before* the @-sign.\n    // URLs are obnoxious.\n    //\n    // ex:\n    // http://a@b@c/ => user:a@b host:c\n    // http://a@b?@c => user:a host:c path:/?@c\n\n    // v0.12 TODO(isaacs): This is not quite how Chrome does things.\n    // Review our test case against browsers more comprehensively.\n\n    // find the first instance of any hostEndingChars\n    var hostEnd = -1;\n    for (var i = 0; i < hostEndingChars.length; i++) {\n      var hec = rest.indexOf(hostEndingChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n\n    // at this point, either we have an explicit point where the\n    // auth portion cannot go past, or the last @ char is the decider.\n    var auth, atSign;\n    if (hostEnd === -1) {\n      // atSign can be anywhere.\n      atSign = rest.lastIndexOf('@');\n    } else {\n      // atSign must be in auth portion.\n      // http://a@b/c@d => host:b auth:a path:/c@d\n      atSign = rest.lastIndexOf('@', hostEnd);\n    }\n\n    // Now we have a portion which is definitely the auth.\n    // Pull that off.\n    if (atSign !== -1) {\n      auth = rest.slice(0, atSign);\n      rest = rest.slice(atSign + 1);\n      this.auth = decodeURIComponent(auth);\n    }\n\n    // the host is the remaining to the left of the first non-host char\n    hostEnd = -1;\n    for (var i = 0; i < nonHostChars.length; i++) {\n      var hec = rest.indexOf(nonHostChars[i]);\n      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))\n        hostEnd = hec;\n    }\n    // if we still have not hit it, then the entire thing is a host.\n    if (hostEnd === -1)\n      hostEnd = rest.length;\n\n    this.host = rest.slice(0, hostEnd);\n    rest = rest.slice(hostEnd);\n\n    // pull out port.\n    this.parseHost();\n\n    // we've indicated that there is a hostname,\n    // so even if it's empty, it has to be present.\n    this.hostname = this.hostname || '';\n\n    // if hostname begins with [ and ends with ]\n    // assume that it's an IPv6 address.\n    var ipv6Hostname = this.hostname[0] === '[' &&\n        this.hostname[this.hostname.length - 1] === ']';\n\n    // validate a little.\n    if (!ipv6Hostname) {\n      var hostparts = this.hostname.split(/\\./);\n      for (var i = 0, l = hostparts.length; i < l; i++) {\n        var part = hostparts[i];\n        if (!part) continue;\n        if (!part.match(hostnamePartPattern)) {\n          var newpart = '';\n          for (var j = 0, k = part.length; j < k; j++) {\n            if (part.charCodeAt(j) > 127) {\n              // we replace non-ASCII char with a temporary placeholder\n              // we need this to make sure size of hostname is not\n              // broken by replacing non-ASCII by nothing\n              newpart += 'x';\n            } else {\n              newpart += part[j];\n            }\n          }\n          // we test again with ASCII char only\n          if (!newpart.match(hostnamePartPattern)) {\n            var validParts = hostparts.slice(0, i);\n            var notHost = hostparts.slice(i + 1);\n            var bit = part.match(hostnamePartStart);\n            if (bit) {\n              validParts.push(bit[1]);\n              notHost.unshift(bit[2]);\n            }\n            if (notHost.length) {\n              rest = '/' + notHost.join('.') + rest;\n            }\n            this.hostname = validParts.join('.');\n            break;\n          }\n        }\n      }\n    }\n\n    if (this.hostname.length > hostnameMaxLen) {\n      this.hostname = '';\n    } else {\n      // hostnames are always lower case.\n      this.hostname = this.hostname.toLowerCase();\n    }\n\n    if (!ipv6Hostname) {\n      // IDNA Support: Returns a punycoded representation of \"domain\".\n      // It only converts parts of the domain name that\n      // have non-ASCII characters, i.e. it doesn't matter if\n      // you call it with a domain that already is ASCII-only.\n      this.hostname = punycode.toASCII(this.hostname);\n    }\n\n    var p = this.port ? ':' + this.port : '';\n    var h = this.hostname || '';\n    this.host = h + p;\n    this.href += this.host;\n\n    // strip [ and ] from the hostname\n    // the host field still retains them, though\n    if (ipv6Hostname) {\n      this.hostname = this.hostname.substr(1, this.hostname.length - 2);\n      if (rest[0] !== '/') {\n        rest = '/' + rest;\n      }\n    }\n  }\n\n  // now rest is set to the post-host stuff.\n  // chop off any delim chars.\n  if (!unsafeProtocol[lowerProto]) {\n\n    // First, make 100% sure that any \"autoEscape\" chars get\n    // escaped, even if encodeURIComponent doesn't think they\n    // need to be.\n    for (var i = 0, l = autoEscape.length; i < l; i++) {\n      var ae = autoEscape[i];\n      if (rest.indexOf(ae) === -1)\n        continue;\n      var esc = encodeURIComponent(ae);\n      if (esc === ae) {\n        esc = escape(ae);\n      }\n      rest = rest.split(ae).join(esc);\n    }\n  }\n\n\n  // chop off from the tail first.\n  var hash = rest.indexOf('#');\n  if (hash !== -1) {\n    // got a fragment string.\n    this.hash = rest.substr(hash);\n    rest = rest.slice(0, hash);\n  }\n  var qm = rest.indexOf('?');\n  if (qm !== -1) {\n    this.search = rest.substr(qm);\n    this.query = rest.substr(qm + 1);\n    if (parseQueryString) {\n      this.query = querystring.parse(this.query);\n    }\n    rest = rest.slice(0, qm);\n  } else if (parseQueryString) {\n    // no query string, but parseQueryString still requested\n    this.search = '';\n    this.query = {};\n  }\n  if (rest) this.pathname = rest;\n  if (slashedProtocol[lowerProto] &&\n      this.hostname && !this.pathname) {\n    this.pathname = '/';\n  }\n\n  //to support http.request\n  if (this.pathname || this.search) {\n    var p = this.pathname || '';\n    var s = this.search || '';\n    this.path = p + s;\n  }\n\n  // finally, reconstruct the href based on what has been validated.\n  this.href = this.format();\n  return this;\n};\n\n// format a parsed object into a url string\nfunction urlFormat(obj) {\n  // ensure it's an object, and not a string url.\n  // If it's an obj, this is a no-op.\n  // this way, you can call url_format() on strings\n  // to clean up potentially wonky urls.\n  if (util.isString(obj)) obj = urlParse(obj);\n  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);\n  return obj.format();\n}\n\nUrl.prototype.format = function() {\n  var auth = this.auth || '';\n  if (auth) {\n    auth = encodeURIComponent(auth);\n    auth = auth.replace(/%3A/i, ':');\n    auth += '@';\n  }\n\n  var protocol = this.protocol || '',\n      pathname = this.pathname || '',\n      hash = this.hash || '',\n      host = false,\n      query = '';\n\n  if (this.host) {\n    host = auth + this.host;\n  } else if (this.hostname) {\n    host = auth + (this.hostname.indexOf(':') === -1 ?\n        this.hostname :\n        '[' + this.hostname + ']');\n    if (this.port) {\n      host += ':' + this.port;\n    }\n  }\n\n  if (this.query &&\n      util.isObject(this.query) &&\n      Object.keys(this.query).length) {\n    query = querystring.stringify(this.query);\n  }\n\n  var search = this.search || (query && ('?' + query)) || '';\n\n  if (protocol && protocol.substr(-1) !== ':') protocol += ':';\n\n  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.\n  // unless they had them to begin with.\n  if (this.slashes ||\n      (!protocol || slashedProtocol[protocol]) && host !== false) {\n    host = '//' + (host || '');\n    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;\n  } else if (!host) {\n    host = '';\n  }\n\n  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;\n  if (search && search.charAt(0) !== '?') search = '?' + search;\n\n  pathname = pathname.replace(/[?#]/g, function(match) {\n    return encodeURIComponent(match);\n  });\n  search = search.replace('#', '%23');\n\n  return protocol + host + pathname + search + hash;\n};\n\nfunction urlResolve(source, relative) {\n  return urlParse(source, false, true).resolve(relative);\n}\n\nUrl.prototype.resolve = function(relative) {\n  return this.resolveObject(urlParse(relative, false, true)).format();\n};\n\nfunction urlResolveObject(source, relative) {\n  if (!source) return relative;\n  return urlParse(source, false, true).resolveObject(relative);\n}\n\nUrl.prototype.resolveObject = function(relative) {\n  if (util.isString(relative)) {\n    var rel = new Url();\n    rel.parse(relative, false, true);\n    relative = rel;\n  }\n\n  var result = new Url();\n  var tkeys = Object.keys(this);\n  for (var tk = 0; tk < tkeys.length; tk++) {\n    var tkey = tkeys[tk];\n    result[tkey] = this[tkey];\n  }\n\n  // hash is always overridden, no matter what.\n  // even href=\"\" will remove it.\n  result.hash = relative.hash;\n\n  // if the relative url is empty, then there's nothing left to do here.\n  if (relative.href === '') {\n    result.href = result.format();\n    return result;\n  }\n\n  // hrefs like //foo/bar always cut to the protocol.\n  if (relative.slashes && !relative.protocol) {\n    // take everything except the protocol from relative\n    var rkeys = Object.keys(relative);\n    for (var rk = 0; rk < rkeys.length; rk++) {\n      var rkey = rkeys[rk];\n      if (rkey !== 'protocol')\n        result[rkey] = relative[rkey];\n    }\n\n    //urlParse appends trailing / to urls like http://www.example.com\n    if (slashedProtocol[result.protocol] &&\n        result.hostname && !result.pathname) {\n      result.path = result.pathname = '/';\n    }\n\n    result.href = result.format();\n    return result;\n  }\n\n  if (relative.protocol && relative.protocol !== result.protocol) {\n    // if it's a known url protocol, then changing\n    // the protocol does weird things\n    // first, if it's not file:, then we MUST have a host,\n    // and if there was a path\n    // to begin with, then we MUST have a path.\n    // if it is file:, then the host is dropped,\n    // because that's known to be hostless.\n    // anything else is assumed to be absolute.\n    if (!slashedProtocol[relative.protocol]) {\n      var keys = Object.keys(relative);\n      for (var v = 0; v < keys.length; v++) {\n        var k = keys[v];\n        result[k] = relative[k];\n      }\n      result.href = result.format();\n      return result;\n    }\n\n    result.protocol = relative.protocol;\n    if (!relative.host && !hostlessProtocol[relative.protocol]) {\n      var relPath = (relative.pathname || '').split('/');\n      while (relPath.length && !(relative.host = relPath.shift()));\n      if (!relative.host) relative.host = '';\n      if (!relative.hostname) relative.hostname = '';\n      if (relPath[0] !== '') relPath.unshift('');\n      if (relPath.length < 2) relPath.unshift('');\n      result.pathname = relPath.join('/');\n    } else {\n      result.pathname = relative.pathname;\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    result.host = relative.host || '';\n    result.auth = relative.auth;\n    result.hostname = relative.hostname || relative.host;\n    result.port = relative.port;\n    // to support http.request\n    if (result.pathname || result.search) {\n      var p = result.pathname || '';\n      var s = result.search || '';\n      result.path = p + s;\n    }\n    result.slashes = result.slashes || relative.slashes;\n    result.href = result.format();\n    return result;\n  }\n\n  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),\n      isRelAbs = (\n          relative.host ||\n          relative.pathname && relative.pathname.charAt(0) === '/'\n      ),\n      mustEndAbs = (isRelAbs || isSourceAbs ||\n                    (result.host && relative.pathname)),\n      removeAllDots = mustEndAbs,\n      srcPath = result.pathname && result.pathname.split('/') || [],\n      relPath = relative.pathname && relative.pathname.split('/') || [],\n      psychotic = result.protocol && !slashedProtocol[result.protocol];\n\n  // if the url is a non-slashed url, then relative\n  // links like ../.. should be able\n  // to crawl up to the hostname, as well.  This is strange.\n  // result.protocol has already been set by now.\n  // Later on, put the first path part into the host field.\n  if (psychotic) {\n    result.hostname = '';\n    result.port = null;\n    if (result.host) {\n      if (srcPath[0] === '') srcPath[0] = result.host;\n      else srcPath.unshift(result.host);\n    }\n    result.host = '';\n    if (relative.protocol) {\n      relative.hostname = null;\n      relative.port = null;\n      if (relative.host) {\n        if (relPath[0] === '') relPath[0] = relative.host;\n        else relPath.unshift(relative.host);\n      }\n      relative.host = null;\n    }\n    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');\n  }\n\n  if (isRelAbs) {\n    // it's absolute.\n    result.host = (relative.host || relative.host === '') ?\n                  relative.host : result.host;\n    result.hostname = (relative.hostname || relative.hostname === '') ?\n                      relative.hostname : result.hostname;\n    result.search = relative.search;\n    result.query = relative.query;\n    srcPath = relPath;\n    // fall through to the dot-handling below.\n  } else if (relPath.length) {\n    // it's relative\n    // throw away the existing file, and take the new path instead.\n    if (!srcPath) srcPath = [];\n    srcPath.pop();\n    srcPath = srcPath.concat(relPath);\n    result.search = relative.search;\n    result.query = relative.query;\n  } else if (!util.isNullOrUndefined(relative.search)) {\n    // just pull out the search.\n    // like href='?foo'.\n    // Put this after the other two cases because it simplifies the booleans\n    if (psychotic) {\n      result.hostname = result.host = srcPath.shift();\n      //occationaly the auth can get stuck only in host\n      //this especially happens in cases like\n      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n      var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                       result.host.split('@') : false;\n      if (authInHost) {\n        result.auth = authInHost.shift();\n        result.host = result.hostname = authInHost.shift();\n      }\n    }\n    result.search = relative.search;\n    result.query = relative.query;\n    //to support http.request\n    if (!util.isNull(result.pathname) || !util.isNull(result.search)) {\n      result.path = (result.pathname ? result.pathname : '') +\n                    (result.search ? result.search : '');\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  if (!srcPath.length) {\n    // no path at all.  easy.\n    // we've already handled the other stuff above.\n    result.pathname = null;\n    //to support http.request\n    if (result.search) {\n      result.path = '/' + result.search;\n    } else {\n      result.path = null;\n    }\n    result.href = result.format();\n    return result;\n  }\n\n  // if a url ENDs in . or .., then it must get a trailing slash.\n  // however, if it ends in anything else non-slashy,\n  // then it must NOT get a trailing slash.\n  var last = srcPath.slice(-1)[0];\n  var hasTrailingSlash = (\n      (result.host || relative.host || srcPath.length > 1) &&\n      (last === '.' || last === '..') || last === '');\n\n  // strip single dots, resolve double dots to parent dir\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = srcPath.length; i >= 0; i--) {\n    last = srcPath[i];\n    if (last === '.') {\n      srcPath.splice(i, 1);\n    } else if (last === '..') {\n      srcPath.splice(i, 1);\n      up++;\n    } else if (up) {\n      srcPath.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (!mustEndAbs && !removeAllDots) {\n    for (; up--; up) {\n      srcPath.unshift('..');\n    }\n  }\n\n  if (mustEndAbs && srcPath[0] !== '' &&\n      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {\n    srcPath.unshift('');\n  }\n\n  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {\n    srcPath.push('');\n  }\n\n  var isAbsolute = srcPath[0] === '' ||\n      (srcPath[0] && srcPath[0].charAt(0) === '/');\n\n  // put the host back\n  if (psychotic) {\n    result.hostname = result.host = isAbsolute ? '' :\n                                    srcPath.length ? srcPath.shift() : '';\n    //occationaly the auth can get stuck only in host\n    //this especially happens in cases like\n    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')\n    var authInHost = result.host && result.host.indexOf('@') > 0 ?\n                     result.host.split('@') : false;\n    if (authInHost) {\n      result.auth = authInHost.shift();\n      result.host = result.hostname = authInHost.shift();\n    }\n  }\n\n  mustEndAbs = mustEndAbs || (result.host && srcPath.length);\n\n  if (mustEndAbs && !isAbsolute) {\n    srcPath.unshift('');\n  }\n\n  if (!srcPath.length) {\n    result.pathname = null;\n    result.path = null;\n  } else {\n    result.pathname = srcPath.join('/');\n  }\n\n  //to support request.http\n  if (!util.isNull(result.pathname) || !util.isNull(result.search)) {\n    result.path = (result.pathname ? result.pathname : '') +\n                  (result.search ? result.search : '');\n  }\n  result.auth = relative.auth || result.auth;\n  result.slashes = result.slashes || relative.slashes;\n  result.href = result.format();\n  return result;\n};\n\nUrl.prototype.parseHost = function() {\n  var host = this.host;\n  var port = portPattern.exec(host);\n  if (port) {\n    port = port[0];\n    if (port !== ':') {\n      this.port = port.substr(1);\n    }\n    host = host.substr(0, host.length - port.length);\n  }\n  if (host) this.hostname = host;\n};\n",
+    "'use strict';\n\nmodule.exports = {\n  isString: function(arg) {\n    return typeof(arg) === 'string';\n  },\n  isObject: function(arg) {\n    return typeof(arg) === 'object' && arg !== null;\n  },\n  isNull: function(arg) {\n    return arg === null;\n  },\n  isNullOrUndefined: function(arg) {\n    return arg == null;\n  }\n};\n",
     "\n/**\n * Module exports.\n */\n\nmodule.exports = deprecate;\n\n/**\n * Mark that a method should not be used.\n * Returns a modified function which warns once by default.\n *\n * If `localStorage.noDeprecation = true` is set, then it is a no-op.\n *\n * If `localStorage.throwDeprecation = true` is set, then deprecated functions\n * will throw an Error when invoked.\n *\n * If `localStorage.traceDeprecation = true` is set, then deprecated functions\n * will invoke `console.trace()` instead of `console.error()`.\n *\n * @param {Function} fn - the function to deprecate\n * @param {String} msg - the string to print to the console when `fn` is invoked\n * @returns {Function} a new \"deprecated\" version of `fn`\n * @api public\n */\n\nfunction deprecate (fn, msg) {\n  if (config('noDeprecation')) {\n    return fn;\n  }\n\n  var warned = false;\n  function deprecated() {\n    if (!warned) {\n      if (config('throwDeprecation')) {\n        throw new Error(msg);\n      } else if (config('traceDeprecation')) {\n        console.trace(msg);\n      } else {\n        console.warn(msg);\n      }\n      warned = true;\n    }\n    return fn.apply(this, arguments);\n  }\n\n  return deprecated;\n}\n\n/**\n * Checks `localStorage` for boolean values for the given `name`.\n *\n * @param {String} name\n * @returns {Boolean}\n * @api private\n */\n\nfunction config (name) {\n  // accessing global.localStorage can trigger a DOMException in sandboxed iframes\n  try {\n    if (!global.localStorage) return false;\n  } catch (_) {\n    return false;\n  }\n  var val = global.localStorage[name];\n  if (null == val) return false;\n  return String(val).toLowerCase() === 'true';\n}\n",
     "module.exports = function isBuffer(arg) {\n  return arg && typeof arg === 'object'\n    && typeof arg.copy === 'function'\n    && typeof arg.fill === 'function'\n    && typeof arg.readUInt8 === 'function';\n}",
     "// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nvar formatRegExp = /%[sdj%]/g;\nexports.format = function(f) {\n  if (!isString(f)) {\n    var objects = [];\n    for (var i = 0; i < arguments.length; i++) {\n      objects.push(inspect(arguments[i]));\n    }\n    return objects.join(' ');\n  }\n\n  var i = 1;\n  var args = arguments;\n  var len = args.length;\n  var str = String(f).replace(formatRegExp, function(x) {\n    if (x === '%%') return '%';\n    if (i >= len) return x;\n    switch (x) {\n      case '%s': return String(args[i++]);\n      case '%d': return Number(args[i++]);\n      case '%j':\n        try {\n          return JSON.stringify(args[i++]);\n        } catch (_) {\n          return '[Circular]';\n        }\n      default:\n        return x;\n    }\n  });\n  for (var x = args[i]; i < len; x = args[++i]) {\n    if (isNull(x) || !isObject(x)) {\n      str += ' ' + x;\n    } else {\n      str += ' ' + inspect(x);\n    }\n  }\n  return str;\n};\n\n\n// Mark that a method should not be used.\n// Returns a modified function which warns once by default.\n// If --no-deprecation is set, then it is a no-op.\nexports.deprecate = function(fn, msg) {\n  // Allow for deprecating things in the process of starting up.\n  if (isUndefined(global.process)) {\n    return function() {\n      return exports.deprecate(fn, msg).apply(this, arguments);\n    };\n  }\n\n  if (process.noDeprecation === true) {\n    return fn;\n  }\n\n  var warned = false;\n  function deprecated() {\n    if (!warned) {\n      if (process.throwDeprecation) {\n        throw new Error(msg);\n      } else if (process.traceDeprecation) {\n        console.trace(msg);\n      } else {\n        console.error(msg);\n      }\n      warned = true;\n    }\n    return fn.apply(this, arguments);\n  }\n\n  return deprecated;\n};\n\n\nvar debugs = {};\nvar debugEnviron;\nexports.debuglog = function(set) {\n  if (isUndefined(debugEnviron))\n    debugEnviron = process.env.NODE_DEBUG || '';\n  set = set.toUpperCase();\n  if (!debugs[set]) {\n    if (new RegExp('\\\\b' + set + '\\\\b', 'i').test(debugEnviron)) {\n      var pid = process.pid;\n      debugs[set] = function() {\n        var msg = exports.format.apply(exports, arguments);\n        console.error('%s %d: %s', set, pid, msg);\n      };\n    } else {\n      debugs[set] = function() {};\n    }\n  }\n  return debugs[set];\n};\n\n\n/**\n * Echos the value of a value. Trys to print the value out\n * in the best way possible given the different types.\n *\n * @param {Object} obj The object to print out.\n * @param {Object} opts Optional options object that alters the output.\n */\n/* legacy: obj, showHidden, depth, colors*/\nfunction inspect(obj, opts) {\n  // default options\n  var ctx = {\n    seen: [],\n    stylize: stylizeNoColor\n  };\n  // legacy...\n  if (arguments.length >= 3) ctx.depth = arguments[2];\n  if (arguments.length >= 4) ctx.colors = arguments[3];\n  if (isBoolean(opts)) {\n    // legacy...\n    ctx.showHidden = opts;\n  } else if (opts) {\n    // got an \"options\" object\n    exports._extend(ctx, opts);\n  }\n  // set default options\n  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;\n  if (isUndefined(ctx.depth)) ctx.depth = 2;\n  if (isUndefined(ctx.colors)) ctx.colors = false;\n  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;\n  if (ctx.colors) ctx.stylize = stylizeWithColor;\n  return formatValue(ctx, obj, ctx.depth);\n}\nexports.inspect = inspect;\n\n\n// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics\ninspect.colors = {\n  'bold' : [1, 22],\n  'italic' : [3, 23],\n  'underline' : [4, 24],\n  'inverse' : [7, 27],\n  'white' : [37, 39],\n  'grey' : [90, 39],\n  'black' : [30, 39],\n  'blue' : [34, 39],\n  'cyan' : [36, 39],\n  'green' : [32, 39],\n  'magenta' : [35, 39],\n  'red' : [31, 39],\n  'yellow' : [33, 39]\n};\n\n// Don't use 'blue' not visible on cmd.exe\ninspect.styles = {\n  'special': 'cyan',\n  'number': 'yellow',\n  'boolean': 'yellow',\n  'undefined': 'grey',\n  'null': 'bold',\n  'string': 'green',\n  'date': 'magenta',\n  // \"name\": intentionally not styling\n  'regexp': 'red'\n};\n\n\nfunction stylizeWithColor(str, styleType) {\n  var style = inspect.styles[styleType];\n\n  if (style) {\n    return '\\u001b[' + inspect.colors[style][0] + 'm' + str +\n           '\\u001b[' + inspect.colors[style][1] + 'm';\n  } else {\n    return str;\n  }\n}\n\n\nfunction stylizeNoColor(str, styleType) {\n  return str;\n}\n\n\nfunction arrayToHash(array) {\n  var hash = {};\n\n  array.forEach(function(val, idx) {\n    hash[val] = true;\n  });\n\n  return hash;\n}\n\n\nfunction formatValue(ctx, value, recurseTimes) {\n  // Provide a hook for user-specified inspect functions.\n  // Check that value is an object with an inspect function on it\n  if (ctx.customInspect &&\n      value &&\n      isFunction(value.inspect) &&\n      // Filter out the util module, it's inspect function is special\n      value.inspect !== exports.inspect &&\n      // Also filter out any prototype objects using the circular check.\n      !(value.constructor && value.constructor.prototype === value)) {\n    var ret = value.inspect(recurseTimes, ctx);\n    if (!isString(ret)) {\n      ret = formatValue(ctx, ret, recurseTimes);\n    }\n    return ret;\n  }\n\n  // Primitive types cannot have properties\n  var primitive = formatPrimitive(ctx, value);\n  if (primitive) {\n    return primitive;\n  }\n\n  // Look up the keys of the object.\n  var keys = Object.keys(value);\n  var visibleKeys = arrayToHash(keys);\n\n  if (ctx.showHidden) {\n    keys = Object.getOwnPropertyNames(value);\n  }\n\n  // IE doesn't make error fields non-enumerable\n  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx\n  if (isError(value)\n      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {\n    return formatError(value);\n  }\n\n  // Some type of object without properties can be shortcutted.\n  if (keys.length === 0) {\n    if (isFunction(value)) {\n      var name = value.name ? ': ' + value.name : '';\n      return ctx.stylize('[Function' + name + ']', 'special');\n    }\n    if (isRegExp(value)) {\n      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');\n    }\n    if (isDate(value)) {\n      return ctx.stylize(Date.prototype.toString.call(value), 'date');\n    }\n    if (isError(value)) {\n      return formatError(value);\n    }\n  }\n\n  var base = '', array = false, braces = ['{', '}'];\n\n  // Make Array say that they are Array\n  if (isArray(value)) {\n    array = true;\n    braces = ['[', ']'];\n  }\n\n  // Make functions say that they are functions\n  if (isFunction(value)) {\n    var n = value.name ? ': ' + value.name : '';\n    base = ' [Function' + n + ']';\n  }\n\n  // Make RegExps say that they are RegExps\n  if (isRegExp(value)) {\n    base = ' ' + RegExp.prototype.toString.call(value);\n  }\n\n  // Make dates with properties first say the date\n  if (isDate(value)) {\n    base = ' ' + Date.prototype.toUTCString.call(value);\n  }\n\n  // Make error with message first say the error\n  if (isError(value)) {\n    base = ' ' + formatError(value);\n  }\n\n  if (keys.length === 0 && (!array || value.length == 0)) {\n    return braces[0] + base + braces[1];\n  }\n\n  if (recurseTimes < 0) {\n    if (isRegExp(value)) {\n      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');\n    } else {\n      return ctx.stylize('[Object]', 'special');\n    }\n  }\n\n  ctx.seen.push(value);\n\n  var output;\n  if (array) {\n    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);\n  } else {\n    output = keys.map(function(key) {\n      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);\n    });\n  }\n\n  ctx.seen.pop();\n\n  return reduceToSingleString(output, base, braces);\n}\n\n\nfunction formatPrimitive(ctx, value) {\n  if (isUndefined(value))\n    return ctx.stylize('undefined', 'undefined');\n  if (isString(value)) {\n    var simple = '\\'' + JSON.stringify(value).replace(/^\"|\"$/g, '')\n                                             .replace(/'/g, \"\\\\'\")\n                                             .replace(/\\\\\"/g, '\"') + '\\'';\n    return ctx.stylize(simple, 'string');\n  }\n  if (isNumber(value))\n    return ctx.stylize('' + value, 'number');\n  if (isBoolean(value))\n    return ctx.stylize('' + value, 'boolean');\n  // For some reason typeof null is \"object\", so special case here.\n  if (isNull(value))\n    return ctx.stylize('null', 'null');\n}\n\n\nfunction formatError(value) {\n  return '[' + Error.prototype.toString.call(value) + ']';\n}\n\n\nfunction formatArray(ctx, value, recurseTimes, visibleKeys, keys) {\n  var output = [];\n  for (var i = 0, l = value.length; i < l; ++i) {\n    if (hasOwnProperty(value, String(i))) {\n      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,\n          String(i), true));\n    } else {\n      output.push('');\n    }\n  }\n  keys.forEach(function(key) {\n    if (!key.match(/^\\d+$/)) {\n      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,\n          key, true));\n    }\n  });\n  return output;\n}\n\n\nfunction formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {\n  var name, str, desc;\n  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };\n  if (desc.get) {\n    if (desc.set) {\n      str = ctx.stylize('[Getter/Setter]', 'special');\n    } else {\n      str = ctx.stylize('[Getter]', 'special');\n    }\n  } else {\n    if (desc.set) {\n      str = ctx.stylize('[Setter]', 'special');\n    }\n  }\n  if (!hasOwnProperty(visibleKeys, key)) {\n    name = '[' + key + ']';\n  }\n  if (!str) {\n    if (ctx.seen.indexOf(desc.value) < 0) {\n      if (isNull(recurseTimes)) {\n        str = formatValue(ctx, desc.value, null);\n      } else {\n        str = formatValue(ctx, desc.value, recurseTimes - 1);\n      }\n      if (str.indexOf('\\n') > -1) {\n        if (array) {\n          str = str.split('\\n').map(function(line) {\n            return '  ' + line;\n          }).join('\\n').substr(2);\n        } else {\n          str = '\\n' + str.split('\\n').map(function(line) {\n            return '   ' + line;\n          }).join('\\n');\n        }\n      }\n    } else {\n      str = ctx.stylize('[Circular]', 'special');\n    }\n  }\n  if (isUndefined(name)) {\n    if (array && key.match(/^\\d+$/)) {\n      return str;\n    }\n    name = JSON.stringify('' + key);\n    if (name.match(/^\"([a-zA-Z_][a-zA-Z_0-9]*)\"$/)) {\n      name = name.substr(1, name.length - 2);\n      name = ctx.stylize(name, 'name');\n    } else {\n      name = name.replace(/'/g, \"\\\\'\")\n                 .replace(/\\\\\"/g, '\"')\n                 .replace(/(^\"|\"$)/g, \"'\");\n      name = ctx.stylize(name, 'string');\n    }\n  }\n\n  return name + ': ' + str;\n}\n\n\nfunction reduceToSingleString(output, base, braces) {\n  var numLinesEst = 0;\n  var length = output.reduce(function(prev, cur) {\n    numLinesEst++;\n    if (cur.indexOf('\\n') >= 0) numLinesEst++;\n    return prev + cur.replace(/\\u001b\\[\\d\\d?m/g, '').length + 1;\n  }, 0);\n\n  if (length > 60) {\n    return braces[0] +\n           (base === '' ? '' : base + '\\n ') +\n           ' ' +\n           output.join(',\\n  ') +\n           ' ' +\n           braces[1];\n  }\n\n  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];\n}\n\n\n// NOTE: These type checking functions intentionally don't use `instanceof`\n// because it is fragile and can be easily faked with `Object.create()`.\nfunction isArray(ar) {\n  return Array.isArray(ar);\n}\nexports.isArray = isArray;\n\nfunction isBoolean(arg) {\n  return typeof arg === 'boolean';\n}\nexports.isBoolean = isBoolean;\n\nfunction isNull(arg) {\n  return arg === null;\n}\nexports.isNull = isNull;\n\nfunction isNullOrUndefined(arg) {\n  return arg == null;\n}\nexports.isNullOrUndefined = isNullOrUndefined;\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\nexports.isNumber = isNumber;\n\nfunction isString(arg) {\n  return typeof arg === 'string';\n}\nexports.isString = isString;\n\nfunction isSymbol(arg) {\n  return typeof arg === 'symbol';\n}\nexports.isSymbol = isSymbol;\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\nexports.isUndefined = isUndefined;\n\nfunction isRegExp(re) {\n  return isObject(re) && objectToString(re) === '[object RegExp]';\n}\nexports.isRegExp = isRegExp;\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\nexports.isObject = isObject;\n\nfunction isDate(d) {\n  return isObject(d) && objectToString(d) === '[object Date]';\n}\nexports.isDate = isDate;\n\nfunction isError(e) {\n  return isObject(e) &&\n      (objectToString(e) === '[object Error]' || e instanceof Error);\n}\nexports.isError = isError;\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\nexports.isFunction = isFunction;\n\nfunction isPrimitive(arg) {\n  return arg === null ||\n         typeof arg === 'boolean' ||\n         typeof arg === 'number' ||\n         typeof arg === 'string' ||\n         typeof arg === 'symbol' ||  // ES6 symbol\n         typeof arg === 'undefined';\n}\nexports.isPrimitive = isPrimitive;\n\nexports.isBuffer = require('./support/isBuffer');\n\nfunction objectToString(o) {\n  return Object.prototype.toString.call(o);\n}\n\n\nfunction pad(n) {\n  return n < 10 ? '0' + n.toString(10) : n.toString(10);\n}\n\n\nvar months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',\n              'Oct', 'Nov', 'Dec'];\n\n// 26 Feb 16:19:34\nfunction timestamp() {\n  var d = new Date();\n  var time = [pad(d.getHours()),\n              pad(d.getMinutes()),\n              pad(d.getSeconds())].join(':');\n  return [d.getDate(), months[d.getMonth()], time].join(' ');\n}\n\n\n// log is just a thin wrapper to console.log that prepends a timestamp\nexports.log = function() {\n  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));\n};\n\n\n/**\n * Inherit the prototype methods from one constructor into another.\n *\n * The Function.prototype.inherits from lang.js rewritten as a standalone\n * function (not on Function.prototype). NOTE: If this file is to be loaded\n * during bootstrapping this function needs to be rewritten using some native\n * functions as prototype setup using normal JavaScript does not work as\n * expected during bootstrapping (see mirror.js in r114903).\n *\n * @param {function} ctor Constructor function which needs to inherit the\n *     prototype.\n * @param {function} superCtor Constructor function to inherit prototype from.\n */\nexports.inherits = require('inherits');\n\nexports._extend = function(origin, add) {\n  // Don't do anything if add isn't an object\n  if (!add || !isObject(add)) return origin;\n\n  var keys = Object.keys(add);\n  var i = keys.length;\n  while (i--) {\n    origin[keys[i]] = add[keys[i]];\n  }\n  return origin;\n};\n\nfunction hasOwnProperty(obj, prop) {\n  return Object.prototype.hasOwnProperty.call(obj, prop);\n}\n",
-    "module.exports = extend\n\nfunction extend() {\n    var target = {}\n\n    for (var i = 0; i < arguments.length; i++) {\n        var source = arguments[i]\n\n        for (var key in source) {\n            if (source.hasOwnProperty(key)) {\n                target[key] = source[key]\n            }\n        }\n    }\n\n    return target\n}\n"
+    "module.exports = extend\n\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\n\nfunction extend() {\n    var target = {}\n\n    for (var i = 0; i < arguments.length; i++) {\n        var source = arguments[i]\n\n        for (var key in source) {\n            if (hasOwnProperty.call(source, key)) {\n                target[key] = source[key]\n            }\n        }\n    }\n\n    return target\n}\n"
   ]
 }
\ No newline at end of file
diff --git a/docs/options.md b/docs/options.md
index a3141700..ecb0427e 100644
--- a/docs/options.md
+++ b/docs/options.md
@@ -21,16 +21,16 @@ $RefParser.dereference("my-schema.yaml", {
 });
 ```
 
-|Option           |Type     |Default   |Description
-|:----------------|:--------|:---------|:----------
-|`allow.json`     |bool     |true      |Determines whether JSON files are supported
-|`allow.yaml`     |bool     |true      |Determines whether YAML files are supported<br> (note: all JSON files are also valid YAML files)
-|`allow.empty`    |bool     |true      |Determines whether it's ok for a `$ref` pointer to point to an empty file
-|`allow.unknown`  |bool     |true      |Determines whether it's ok for a `$ref` pointer to point to an unknown/unsupported file type (such as HTML, text, image, etc.). The default is to resolve unknown files as a [`Buffer`](https://nodejs.org/api/buffer.html#buffer_class_buffer)
-|`$refs.internal` |bool     |true      |Determines whether internal `$ref` pointers (such as `#/definitions/widget`) will be dereferenced when calling [`dereference()`](ref-parser.md#dereferenceschema-options-callback).  Either way, you'll still be able to get the value using [`$Refs.get()`](refs.md#getref-options)
-|`$refs.external` |bool     |true      |Determines whether external `$ref` pointers get resolved/dereferenced. If `false`, then no files/URLs will be retrieved.  Use this if you only want to allow single-file schemas.
-|`$refs.circular` |bool or "ignore"     |true      |Determines whether [circular `$ref` pointers](README.md#circular-refs) are allowed. If `false`, then a `ReferenceError` will be thrown if the schema contains a circular reference.<br><br> If set to `"ignore"`, then circular references will _not_ be dereferenced, even when calling [`dereference()`](ref-parser.md#dereferenceschema-options-callback). No error will be thrown, but the [`$Refs.circular`](refs.md#circular) property will still be set to `true`.
-|`cache.fs`       |number   |60        |<a name="caching"></a>The length of time (in seconds) to cache local files.  The default is one minute.  Setting to zero will cache forever.
-|`cache.http`     |number   |300       |The length of time (in seconds) to cache HTTP URLs.  The default is five minutes.  Setting to zero will cache forever.
-|`cache.https`    |number   |300       |The length of time (in seconds) to cache HTTPS URLs.  The default is five minutes.  Setting to zero will cache forever.
-|`http.withCredentials`    |bool   |true       |When used in browser specifies `withCredentials` option of `XMLHttpRequest` object. Setting to `false` allows loading via CORS with `Access-Control-Allow-Origin` set to `*`
+|Option                |Type     |Default   |Description
+|:---------------------|:--------|:---------|:----------
+|`allow.json`          |bool     |true      |Determines whether JSON files are supported
+|`allow.yaml`          |bool     |true      |Determines whether YAML files are supported<br> (note: all JSON files are also valid YAML files)
+|`allow.empty`         |bool     |true      |Determines whether it's ok for a `$ref` pointer to point to an empty file
+|`allow.unknown`       |bool     |true      |Determines whether it's ok for a `$ref` pointer to point to an unknown/unsupported file type (such as HTML, text, image, etc.). The default is to resolve unknown files as a [`Buffer`](https://nodejs.org/api/buffer.html#buffer_class_buffer)
+|`$refs.internal`      |bool     |true      |Determines whether internal `$ref` pointers (such as `#/definitions/widget`) will be dereferenced when calling [`dereference()`](ref-parser.md#dereferenceschema-options-callback).  Either way, you'll still be able to get the value using [`$Refs.get()`](refs.md#getref-options)
+|`$refs.external`      |bool     |true      |Determines whether external `$ref` pointers get resolved/dereferenced. If `false`, then no files/URLs will be retrieved.  Use this if you only want to allow single-file schemas.
+|`$refs.circular`      |bool or "ignore"     |true      |Determines whether [circular `$ref` pointers](README.md#circular-refs) are allowed. If `false`, then a `ReferenceError` will be thrown if the schema contains a circular reference.<br><br> If set to `"ignore"`, then circular references will _not_ be dereferenced, even when calling [`dereference()`](ref-parser.md#dereferenceschema-options-callback). No error will be thrown, but the [`$Refs.circular`](refs.md#circular) property will still be set to `true`.
+|`cache.fs`            |number   |60        |<a name="caching"></a>The length of time (in seconds) to cache local files.  The default is one minute.  Setting to zero will cache forever.
+|`cache.http`          |number   |300       |The length of time (in seconds) to cache HTTP URLs.  The default is five minutes.  Setting to zero will cache forever.
+|`cache.https`         |number   |300       |The length of time (in seconds) to cache HTTPS URLs.  The default is five minutes.  Setting to zero will cache forever.
+|`http.withCredentials`|bool     |false     |When used in browser specifies [`withCredentials`](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/withCredentials) option of [`XMLHttpRequest`](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest) object. Set this to `true` if you're downloading files from a CORS-enabled server that requries authentication
diff --git a/lib/options.js b/lib/options.js
index dabe8ddc..b7a66108 100644
--- a/lib/options.js
+++ b/lib/options.js
@@ -92,11 +92,16 @@ function $RefParserOptions(options) {
     https: 5 * 60 // 5 minutes
   };
 
-  /* http options */
+  /**
+   * HTTP request options
+   */
   this.http = {
-    /* withCredentials option of XMLHttpRequest */
-    withCredentials: true
-  }
+    /**
+     * The `withCredentials` option of XMLHttpRequest.
+     * Set this to `true` if you're downloading files from a CORS-enabled server that requires authentication
+     */
+    withCredentials: false
+  };
 
   merge(options, this);
 }
diff --git a/package.json b/package.json
index 65399306..bf885f61 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "upgrade": "ncu --upgradeAll && npm update && bower update",
     "bump": "bump --prompt --grep lib/bundle.js dist/* --tag --push --all",
     "release": "npm run upgrade && npm test && npm run bump && npm publish",
-    "start": "http-server -o -c-1"
+    "start": "npm run watch & http-server -o -c-1"
   },
   "repository": {
     "type": "git",
diff --git a/tests/index.html b/tests/index.html
index 9890f1e2..8f47bdfa 100644
--- a/tests/index.html
+++ b/tests/index.html
@@ -53,6 +53,8 @@
     <script src="specs/circular-extended/circular-extended.dereferenced.js"></script>
     <script src="specs/circular-extended/circular-extended.spec.js"></script>
 
+    <script src="specs/cors/cors.spec.js"></script>
+
     <script src="specs/deep/deep.parsed.js"></script>
     <script src="specs/deep/deep.dereferenced.js"></script>
     <script src="specs/deep/deep.bundled.js"></script>
@@ -83,8 +85,6 @@
     <script src="specs/callbacks.spec.js"></script>
     <script src="specs/yaml.spec.js"></script>
 
-    <script src="specs/cors.spec.js"></script>
-
     <script>
       mocha.run();
     </script>
diff --git a/tests/specs/cors/cors.spec.js b/tests/specs/cors/cors.spec.js
index 0e6b3622..ab4816f2 100644
--- a/tests/specs/cors/cors.spec.js
+++ b/tests/specs/cors/cors.spec.js
@@ -1,21 +1,22 @@
 'use strict';
 
-describe('parse from CORS with Access-Control-Allow-Origin: *', function() {
-  var windowOnError, testDone;
-
-  beforeEach(function() {
-    windowOnError = global.onerror;
-    global.onerror = function() {
-      testDone();
-      return true;
-    }
-  });
-
-  afterEach(function() {
-    global.onerror = windowOnError;
+describe('CORS support', function() {
+  it('should download successfully by default', function() {
+    // Swagger.io has CORS enabled, with "Access-Control-Allow-Origin" set to a wildcard ("*").
+    // This should work by-default.
+    var parser = new $RefParser();
+    return parser
+      .parse('http://petstore.swagger.io:80/v2/swagger.json')
+      .then(function(schema) {
+        expect(schema).to.be.an('object');
+        expect(schema).not.to.be.empty;
+        expect(parser.schema).to.equal(schema);
+      });
   });
 
-  it('should parse successfully with http.withCredentials = false', function() {
+  it('should download successfully with http.withCredentials = false (default)', function() {
+    // Swagger.io has CORS enabled, with "Access-Control-Allow-Origin" set to a wildcard ("*").
+    // So, withCredentials MUST be false (this is the default, but we're testing it explicitly here)
     var parser = new $RefParser();
     return parser
       .parse('http://petstore.swagger.io:80/v2/swagger.json', {
@@ -29,8 +30,14 @@ describe('parse from CORS with Access-Control-Allow-Origin: *', function() {
   });
 
   if (userAgent.isBrowser) {
-    it('should throw error in browser if http.withCredentials = true (default)', function(done) {
-      testDone = done;
+    it('should throw error in browser if http.withCredentials = true', function() {
+      // Some old Webkit browsers throw a global error
+      var oldOnError = global.onerror;
+      global.onerror = function() {
+        global.onerror = oldOnError; // restore the original error handler (failsafe)
+        return true;  // ignore the error
+      };
+
       var parser = new $RefParser();
       return parser
         .parse('http://petstore.swagger.io:80/v2/swagger.json', {
@@ -39,7 +46,9 @@ describe('parse from CORS with Access-Control-Allow-Origin: *', function() {
         .then(helper.shouldNotGetCalled)
         .catch(function(err) {
           expect(err.message).to.contain('Error downloading file');
-          done();
+
+          // Restore the original error handler
+          global.onerror = oldOnError;
         });
     });
   }