diff --git a/last_commit.txt b/last_commit.txt
index aa1876bb6c..0d776d8d89 100644
--- a/last_commit.txt
+++ b/last_commit.txt
@@ -1,16 +1,48 @@
-Repository: mockup
+Repository: zodbverify
 
 
 Branch: refs/heads/master
-Date: 2022-07-06T22:59:01+02:00
-Author: Johannes Raggam (thet) <thetetet@gmail.com>
-Commit: https://github.com/plone/mockup/commit/5f4661ab134a3e0ec2b391b0e19a4ff856606490
+Date: 2020-08-24T11:50:38+02:00
+Author: Philip Bauer (pbauer) <bauer@starzel.de>
+Commit: https://github.com/plone/zodbverify/commit/80e292a9fc2580193c769455b76722432461e169
 
-Release new version.
+show all objects that reference a oid. follow the trail of references to referencing items up to the root.
+This should give a idea where in the object-tree a item is actually located, how to access and fix it.
 
 Files changed:
-M CHANGES.md
-M package.json
+M src/zodbverify/verify_oid.py
 
-b'diff --git a/CHANGES.md b/CHANGES.md\nindex e62d323f4..86b0ca640 100644\n--- a/CHANGES.md\n+++ b/CHANGES.md\n@@ -1,5 +1,47 @@\n+# Changelog\n \n \n+\n+## [5.0.0-alpha.12](https://github.com/plone/mockup/compare/5.0.0-alpha.11...5.0.0-alpha.12) (2022-07-06)\n+\n+\n+### Maintenance\n+\n+\n+* Adapt to @patternslib/dev module federation changes. ([730ab0f](https://github.com/plone/mockup/commit/730ab0f4c4b214bd39a1e266ab0123578c4fb606))\n+\n+* **Build:** Upgrade dependencies. ([b297ac4](https://github.com/plone/mockup/commit/b297ac46687130a45b72e89019b9fa43a78f2d3a))\n+\n+* **Build:** Upgrade Patterns to 9.0.0-beta.0 and pat-code-editor to 3.0.0. ([d6996bf](https://github.com/plone/mockup/commit/d6996bf5bf1ea244f9e216ff071e62b7964655c7))\n+\n+* **Cleanup:** prettier whole code base. ([e19f23e](https://github.com/plone/mockup/commit/e19f23e5ef79197810422f66e70127c77a0c7ec8))\n+\n+* **Cleanup:** Remove dependency regenerator-runtime except from test setup. The async/await runtime handling is already built-in in current Babel. ([e848c13](https://github.com/plone/mockup/commit/e848c13a063bad6eea980bfaae90413f53159cfa))\n+\n+* **Cleanup:** Remove unused dependencies. ([a5ef3f2](https://github.com/plone/mockup/commit/a5ef3f21f86cd58e7e19093f3a5d6abcbbe925d4))\n+\n+* **Cleanup:** Remove unused imports and variables. ([9b79ce3](https://github.com/plone/mockup/commit/9b79ce3808ff68acd2e8411cd455981a6aeaa78c))\n+\n+* **Cleanup:** Remove unused r.js file. ([e6322d3](https://github.com/plone/mockup/commit/e6322d3dd7d8f43220fdd5997d474a495b45e4cc))\n+\n+* Depend on @patternslib/dev and extend from there. ([2f2ef5f](https://github.com/plone/mockup/commit/2f2ef5fe47406713340d044444d35fceeb3313ee))\n+\n+* Extend babel config from @patternslib/dev. ([b702492](https://github.com/plone/mockup/commit/b702492f1b614b60c1e058b093ec1c818375ed11))\n+\n+* Extend commitlint config from @patternslib/dev. ([4330cf7](https://github.com/plone/mockup/commit/4330cf7b99d91e22ae38d72bc7e982856162584c))\n+\n+* Extend eslint config from @patternslib/dev. ([857f678](https://github.com/plone/mockup/commit/857f678f314e5d41eac182a676447a18402b1f77))\n+\n+* Extend jest config from @patternslib/dev. ([5c43d43](https://github.com/plone/mockup/commit/5c43d43d5c39f6fc123f3dd900b00082ceb8cc24))\n+\n+* Extend Makefile from @patternslib/dev. ([5da74f4](https://github.com/plone/mockup/commit/5da74f4e76fec1c66b6707be6479a61bfcecfc11))\n+\n+* Extend prettier config from @patternslib/dev. ([08ce446](https://github.com/plone/mockup/commit/08ce4466d8594200df16ad4538fc67cc6adc3471))\n+\n+* Extend release-it config from @patternslib/dev. ([ec69436](https://github.com/plone/mockup/commit/ec69436c837516cc654f11e4c8104b13bd7cbaf1))\n+\n+* Extend webpack config from @patternslib/dev. ([811673a](https://github.com/plone/mockup/commit/811673a0db4e0133ea19adee2bd6b84cc04ddbda))\n+\n ## [5.0.0-alpha.11](https://github.com/plone/mockup/compare/5.0.0-alpha.10...5.0.0-alpha.11) (2022-06-29)\n \n \ndiff --git a/package.json b/package.json\nindex b5e88a80a..4a49b61e4 100644\n--- a/package.json\n+++ b/package.json\n@@ -1,6 +1,6 @@\n {\n     "name": "@plone/mockup",\n-    "version": "5.0.0-alpha.11",\n+    "version": "5.0.0-alpha.12",\n     "description": "A collection of client side patterns for faster and easier web development",\n     "license": "BSD-3-Clause",\n     "main": "./src/patterns.js",\n'
+b'diff --git a/src/zodbverify/verify_oid.py b/src/zodbverify/verify_oid.py\nindex 2d865ff..34b3000 100644\n--- a/src/zodbverify/verify_oid.py\n+++ b/src/zodbverify/verify_oid.py\n@@ -1,5 +1,8 @@\n # -*- coding: utf-8 -*-\n+from collections import defaultdict\n from ZODB.interfaces import IStorageCurrentRecordIteration\n+from ZODB.serialize import get_refs\n+from ZODB.utils import get_pickle_metadata\n from ZODB.utils import oid_repr\n from ZODB.utils import p64\n from zodbverify.verify import verify_record\n@@ -13,6 +16,58 @@\n logger = logging.getLogger("zodbverify")\n \n \n+class Refbuilder(object):\n+\n+    def __init__(self, storage):\n+        self.storage = storage\n+        self.seen = []\n+        self.refs = defaultdict(list)\n+        self.stop_recurse = [\n+            p64(0x00),  # persistent.mapping.PersistentMapping\n+            p64(0x01),  # OFS.Application.Application\n+            p64(0x11),  # Products.CMFPlone.Portal.PloneSite\n+        ]\n+\n+    def build_ref_tree(self):\n+        logger.info(\'Building a reference-tree of ZODB...\')\n+        count = 0\n+        next_ = None\n+        while True:\n+            count += 1\n+            oid, tid, data, next_ = self.storage.record_iternext(next_)\n+\n+            # For each oid create a list of oids that reference it\n+            # Can be used for reverse lookup similar to what fsoids.py\n+            # in ZODB does.\n+            # We store integers since that uses less memory.\n+            oid_refs = get_refs(data)\n+            if oid_refs:\n+                for referenced_oid, class_info in oid_refs:\n+                    self.refs[referenced_oid].append(oid)\n+            if next_ is None:\n+                break\n+            if not count % 5000:\n+                logger.info(\'Objects: {}\'.format(count))\n+        logger.info(\'Created a reference-dict for {} objects.\\n\'.format(count))\n+\n+    def get_refs(self, oid, level=0, max_level=10):\n+        for ref in self.refs[oid]:\n+            if ref in self.seen:\n+                continue\n+            level += 1\n+            if level > max_level:\n+                logger.info(\' 8< --------------- >8 Stop after level {}!\\n\'.format(max_level))\n+                continue\n+            self.seen.append(ref)\n+            pick, state = self.storage.load(ref)\n+            class_info = \'%s.%s\' % get_pickle_metadata(pick)\n+            logger.info(\'{} {} at level {}\'.format(oid_repr(ref), class_info, level))\n+            if oid in self.stop_recurse:\n+                logger.info(\' 8< --------------- >8 Stop at root objects\\n\')\n+                continue\n+            self.get_refs(ref, level)\n+\n+\n def verify_oid(storage, oid, debug=False, app=None):\n     if not IStorageCurrentRecordIteration.providedBy(storage):\n         raise TypeError(\n@@ -60,3 +115,8 @@ def verify_oid(storage, oid, debug=False, app=None):\n     success, msg = verify_record(oid, pickle, debug)\n     if not success:\n         logger.info(\'{}: {}\'.format(msg, oid_repr(oid)))\n+\n+    refbuilder = Refbuilder(storage)\n+    refbuilder.build_ref_tree()\n+    logger.info(\'\\nThis oid is referenced by:\\n\')\n+    refbuilder.get_refs(oid)\n'
+
+Repository: zodbverify
+
+
+Branch: refs/heads/master
+Date: 2020-08-24T11:50:38+02:00
+Author: Philip Bauer (pbauer) <bauer@starzel.de>
+Commit: https://github.com/plone/zodbverify/commit/c38a20935eb4fab5c0ca238214338f30e5321806
+
+Add file-cache of reftree and add more information on refs (name). Mostly stolen from collective.zodbdebug
+
+Files changed:
+M src/zodbverify/verify_oid.py
+
+b'diff --git a/src/zodbverify/verify_oid.py b/src/zodbverify/verify_oid.py\nindex 34b3000..d154ba9 100644\n--- a/src/zodbverify/verify_oid.py\n+++ b/src/zodbverify/verify_oid.py\n@@ -4,10 +4,14 @@\n from ZODB.serialize import get_refs\n from ZODB.utils import get_pickle_metadata\n from ZODB.utils import oid_repr\n+from ZODB.utils import repr_to_oid\n from ZODB.utils import p64\n+from ZODB.utils import tid_repr\n from zodbverify.verify import verify_record\n \n+import json\n import logging\n+import os\n import pdb\n import traceback\n import ZODB\n@@ -18,17 +22,24 @@\n \n class Refbuilder(object):\n \n-    def __init__(self, storage):\n+    def __init__(self, storage, connection):\n         self.storage = storage\n+        self.connection = connection\n         self.seen = []\n         self.refs = defaultdict(list)\n+        self.msg = []\n         self.stop_recurse = [\n-            p64(0x00),  # persistent.mapping.PersistentMapping\n-            p64(0x01),  # OFS.Application.Application\n-            p64(0x11),  # Products.CMFPlone.Portal.PloneSite\n+            \'0x00\',  # persistent.mapping.PersistentMapping\n+            \'0x01\',  # OFS.Application.Application\n+            \'0x11\',  # Products.CMFPlone.Portal.PloneSite\n         ]\n \n-    def build_ref_tree(self):\n+    def get_oid_report(self, oid, level=0, max_level=600, verbose=False):\n+        self.msg.append(\'The oid {} is referenced by:\\n\'.format(oid))\n+        self.inspect_reference_tree(oid, level=0, max_level=600, verbose=verbose)\n+        logger.info(\'\\n\'.join(self.msg))\n+\n+    def _build_ref_tree(self):\n         logger.info(\'Building a reference-tree of ZODB...\')\n         count = 0\n         next_ = None\n@@ -39,33 +50,141 @@ def build_ref_tree(self):\n             # For each oid create a list of oids that reference it\n             # Can be used for reverse lookup similar to what fsoids.py\n             # in ZODB does.\n-            # We store integers since that uses less memory.\n             oid_refs = get_refs(data)\n             if oid_refs:\n                 for referenced_oid, class_info in oid_refs:\n-                    self.refs[referenced_oid].append(oid)\n+                    self.refs[oid_repr(referenced_oid)].append(oid_repr(oid))\n             if next_ is None:\n                 break\n-            if not count % 5000:\n+            if not count % 10000:\n                 logger.info(\'Objects: {}\'.format(count))\n         logger.info(\'Created a reference-dict for {} objects.\\n\'.format(count))\n \n-    def get_refs(self, oid, level=0, max_level=10):\n+    def inspect_reference_tree(self, oid, level=0, max_level=600, verbose=False):\n+        if oid not in self.refs:\n+            logger.debug(\'The oid {} does not exist!\'.format(oid))\n+            return\n+        child_pickle, state = self.storage.load(repr_to_oid(oid))\n+        child_class_info = \'%s.%s\' % get_pickle_metadata(child_pickle)\n+\n         for ref in self.refs[oid]:\n             if ref in self.seen:\n                 continue\n             level += 1\n             if level > max_level:\n-                logger.info(\' 8< --------------- >8 Stop after level {}!\\n\'.format(max_level))\n+                msg = \'8< --------------- >8 Stop after level {}!\\n\'.format(max_level)\n+                self.msg.append(msg)\n+                logger.debug(msg)\n                 continue\n             self.seen.append(ref)\n-            pick, state = self.storage.load(ref)\n+            pick, state = self.storage.load(repr_to_oid(ref))\n             class_info = \'%s.%s\' % get_pickle_metadata(pick)\n-            logger.info(\'{} {} at level {}\'.format(oid_repr(ref), class_info, level))\n+            name = None\n+            if verbose:\n+                name = self.get_id_or_attr_name(oid=oid, parent_oid=ref)\n+\n+            if name:\n+                msg = \'{} ({}) is {} for {} ({}) at level {}\'.format(oid, child_class_info, name, ref, class_info, level)\n+            else:\n+                msg = \'{} ({}) is referenced by {} ({}) at level {}\'.format(oid, child_class_info, ref, class_info, level)\n+            self.msg.append(msg)\n+            logger.debug(msg)\n+\n             if oid in self.stop_recurse:\n-                logger.info(\' 8< --------------- >8 Stop at root objects\\n\')\n+                msg = \'8< --------------- >8 Stop at root objects\'\n+                self.msg.append(msg)\n+                logger.debug(msg)\n                 continue\n-            self.get_refs(ref, level)\n+            self.inspect_reference_tree(ref, level=level, verbose=verbose)\n+\n+    @property\n+    def root_oid(self):\n+        return self.connection.root._root._p_oid\n+\n+    def oid_or_repr_to_oid(self, oid_or_repr):\n+        if isinstance(oid_or_repr, bytes):\n+            return oid_or_repr\n+        return repr_to_oid(oid_or_repr)\n+\n+    def oid_or_repr_to_repr(self, oid_or_repr):\n+        if isinstance(oid_or_repr, bytes):\n+            return oid_repr(oid_or_repr)\n+        return oid_or_repr\n+\n+    # Do not use cache decorators, let ZODB do its caching.\n+    def get_obj(self, oid):\n+        u"""Get the object from its `oid\'."""\n+        oid = self.oid_or_repr_to_oid(oid)\n+        obj = self.connection.get(oid)\n+        obj._p_activate()\n+        return obj\n+\n+    # @instance.memoize\n+    def get_obj_as_str(self, oid):\n+        try:\n+            return str(self.get_obj(oid))\n+        except Exception:\n+            return \'<error>\'\n+\n+    # @instance.memoize\n+    def get_physical_path(self, oid):\n+        try:\n+            return self.get_obj(oid).getPhysicalPath()\n+        except Exception:\n+            return None\n+\n+    # @instance.memoize\n+    def get_id(self, oid):\n+        obj = self.get_obj(oid)\n+        if oid == self.root_oid:\n+            return \'Root\'\n+        getId = getattr(obj, \'getId\', None)\n+        if getId:\n+            try:\n+                return getId()\n+            except:  # noqa\n+                pass\n+        return getattr(obj, \'id\', None)\n+\n+    # @instance.memoize\n+    def get_attr_name(self, oid, parent_oid):\n+        oid = self.oid_or_repr_to_oid(oid)\n+        obj = self.get_obj(oid)\n+        parent = self.get_obj(parent_oid)\n+        names_and_values = ((name, getattr(parent, name, None)) for name in dir(parent))\n+        return next((name for (name, value) in names_and_values if value is obj), None)\n+\n+    # @instance.memoize\n+    def get_id_or_attr_name(self, oid, parent_oid=None):\n+        identifier = self.get_id(oid)\n+        if identifier:\n+            return identifier\n+\n+        return self.get_attr_name(oid, parent_oid) if parent_oid else None\n+\n+    def load_reference_tree(self):\n+        path = self._get_reference_cache_path()\n+        if os.path.exists(path):\n+            with open(path, \'r\') as f:\n+                logger.info(\'Loading json reference-cache from {}\'.format(path))\n+                self.refs = json.load(f)\n+        else:\n+            self._build_ref_tree()\n+            self._store_reference_cache()\n+\n+    def _store_reference_cache(self):\n+        path = self._get_reference_cache_path()\n+        dirname = os.path.dirname(path)\n+        if not os.path.exists(dirname):\n+            os.makedirs(dirname)\n+        with open(path, \'w\') as f:\n+            json.dump(self.refs, f)\n+        logger.info(\'Save reference-cache as {}\'.format(path))\n+\n+    def _get_reference_cache_path(self):\n+        cache_dir = os.path.join(os.path.expanduser(\'~\'), \'.cache\', \'zodbverify\')\n+        last_tid = tid_repr(self.storage.lastTransaction())\n+        return os.path.join(cache_dir, \'zodb_references_{}.json\'.format(last_tid))\n \n \n def verify_oid(storage, oid, debug=False, app=None):\n@@ -77,14 +196,12 @@ def verify_oid(storage, oid, debug=False, app=None):\n     try:\n         # by default expect a 8-byte string (e.g. \'0x22d17d\')\n         # transform to a 64-bit long integer (e.g. b\'\\x00\\x00\\x00\\x00\\x00"\\xd1}\')\n-        as_int = int(oid, 0)\n-        oid = p64(as_int)\n-    except ValueError:\n-        # probably already a 64-bit long integer\n+        oid = repr_to_oid(oid)\n+    except:\n         pass\n \n     if app:\n-        # use exitsing zope instance.\n+        # use existing zope instance.\n         # only available when used as ./bin/instance zodbverify -o XXX\n         connection = app._p_jar\n     else:\n@@ -116,7 +233,6 @@ def verify_oid(storage, oid, debug=False, app=None):\n     if not success:\n         logger.info(\'{}: {}\'.format(msg, oid_repr(oid)))\n \n-    refbuilder = Refbuilder(storage)\n-    refbuilder.build_ref_tree()\n-    logger.info(\'\\nThis oid is referenced by:\\n\')\n-    refbuilder.get_refs(oid)\n+    refbuilder = Refbuilder(storage, connection)\n+    refbuilder.load_reference_tree()\n+    refbuilder.get_oid_report(oid_repr(oid), verbose=True)\n'
+
+Repository: zodbverify
+
+
+Branch: refs/heads/master
+Date: 2022-07-06T23:55:35+02:00
+Author: Maurits van Rees (mauritsvanrees) <maurits@vanrees.org>
+Commit: https://github.com/plone/zodbverify/commit/8e8a3b1a6863fa10f8349b4dfef58aa87a82e188
+
+Merge pull request #8 from plone/show_references
+
+show all objects that reference a oid
+
+Files changed:
+M src/zodbverify/verify_oid.py
+
+b'diff --git a/src/zodbverify/verify_oid.py b/src/zodbverify/verify_oid.py\nindex 2d865ff..d154ba9 100644\n--- a/src/zodbverify/verify_oid.py\n+++ b/src/zodbverify/verify_oid.py\n@@ -1,10 +1,17 @@\n # -*- coding: utf-8 -*-\n+from collections import defaultdict\n from ZODB.interfaces import IStorageCurrentRecordIteration\n+from ZODB.serialize import get_refs\n+from ZODB.utils import get_pickle_metadata\n from ZODB.utils import oid_repr\n+from ZODB.utils import repr_to_oid\n from ZODB.utils import p64\n+from ZODB.utils import tid_repr\n from zodbverify.verify import verify_record\n \n+import json\n import logging\n+import os\n import pdb\n import traceback\n import ZODB\n@@ -13,6 +20,173 @@\n logger = logging.getLogger("zodbverify")\n \n \n+class Refbuilder(object):\n+\n+    def __init__(self, storage, connection):\n+        self.storage = storage\n+        self.connection = connection\n+        self.seen = []\n+        self.refs = defaultdict(list)\n+        self.msg = []\n+        self.stop_recurse = [\n+            \'0x00\',  # persistent.mapping.PersistentMapping\n+            \'0x01\',  # OFS.Application.Application\n+            \'0x11\',  # Products.CMFPlone.Portal.PloneSite\n+        ]\n+\n+    def get_oid_report(self, oid, level=0, max_level=600, verbose=False):\n+        self.msg.append(\'The oid {} is referenced by:\\n\'.format(oid))\n+        self.inspect_reference_tree(oid, level=0, max_level=600, verbose=verbose)\n+        logger.info(\'\\n\'.join(self.msg))\n+\n+    def _build_ref_tree(self):\n+        logger.info(\'Building a reference-tree of ZODB...\')\n+        count = 0\n+        next_ = None\n+        while True:\n+            count += 1\n+            oid, tid, data, next_ = self.storage.record_iternext(next_)\n+\n+            # For each oid create a list of oids that reference it\n+            # Can be used for reverse lookup similar to what fsoids.py\n+            # in ZODB does.\n+            oid_refs = get_refs(data)\n+            if oid_refs:\n+                for referenced_oid, class_info in oid_refs:\n+                    self.refs[oid_repr(referenced_oid)].append(oid_repr(oid))\n+            if next_ is None:\n+                break\n+            if not count % 10000:\n+                logger.info(\'Objects: {}\'.format(count))\n+        logger.info(\'Created a reference-dict for {} objects.\\n\'.format(count))\n+\n+    def inspect_reference_tree(self, oid, level=0, max_level=600, verbose=False):\n+        if oid not in self.refs:\n+            logger.debug(\'The oid {} does not exist!\'.format(oid))\n+            return\n+        child_pickle, state = self.storage.load(repr_to_oid(oid))\n+        child_class_info = \'%s.%s\' % get_pickle_metadata(child_pickle)\n+\n+        for ref in self.refs[oid]:\n+            if ref in self.seen:\n+                continue\n+            level += 1\n+            if level > max_level:\n+                msg = \'8< --------------- >8 Stop after level {}!\\n\'.format(max_level)\n+                self.msg.append(msg)\n+                logger.debug(msg)\n+                continue\n+            self.seen.append(ref)\n+            pick, state = self.storage.load(repr_to_oid(ref))\n+            class_info = \'%s.%s\' % get_pickle_metadata(pick)\n+            name = None\n+            if verbose:\n+                name = self.get_id_or_attr_name(oid=oid, parent_oid=ref)\n+\n+            if name:\n+                msg = \'{} ({}) is {} for {} ({}) at level {}\'.format(oid, child_class_info, name, ref, class_info, level)\n+            else:\n+                msg = \'{} ({}) is referenced by {} ({}) at level {}\'.format(oid, child_class_info, ref, class_info, level)\n+            self.msg.append(msg)\n+            logger.debug(msg)\n+\n+            if oid in self.stop_recurse:\n+                msg = \'8< --------------- >8 Stop at root objects\'\n+                self.msg.append(msg)\n+                logger.debug(msg)\n+                continue\n+            self.inspect_reference_tree(ref, level=level, verbose=verbose)\n+\n+    @property\n+    def root_oid(self):\n+        return self.connection.root._root._p_oid\n+\n+    def oid_or_repr_to_oid(self, oid_or_repr):\n+        if isinstance(oid_or_repr, bytes):\n+            return oid_or_repr\n+        return repr_to_oid(oid_or_repr)\n+\n+    def oid_or_repr_to_repr(self, oid_or_repr):\n+        if isinstance(oid_or_repr, bytes):\n+            return oid_repr(oid_or_repr)\n+        return oid_or_repr\n+\n+    # Do not use cache decorators, let ZODB do its caching.\n+    def get_obj(self, oid):\n+        u"""Get the object from its `oid\'."""\n+        oid = self.oid_or_repr_to_oid(oid)\n+        obj = self.connection.get(oid)\n+        obj._p_activate()\n+        return obj\n+\n+    # @instance.memoize\n+    def get_obj_as_str(self, oid):\n+        try:\n+            return str(self.get_obj(oid))\n+        except Exception:\n+            return \'<error>\'\n+\n+    # @instance.memoize\n+    def get_physical_path(self, oid):\n+        try:\n+            return self.get_obj(oid).getPhysicalPath()\n+        except Exception:\n+            return None\n+\n+    # @instance.memoize\n+    def get_id(self, oid):\n+        obj = self.get_obj(oid)\n+        if oid == self.root_oid:\n+            return \'Root\'\n+        getId = getattr(obj, \'getId\', None)\n+        if getId:\n+            try:\n+                return getId()\n+            except:  # noqa\n+                pass\n+        return getattr(obj, \'id\', None)\n+\n+    # @instance.memoize\n+    def get_attr_name(self, oid, parent_oid):\n+        oid = self.oid_or_repr_to_oid(oid)\n+        obj = self.get_obj(oid)\n+        parent = self.get_obj(parent_oid)\n+        names_and_values = ((name, getattr(parent, name, None)) for name in dir(parent))\n+        return next((name for (name, value) in names_and_values if value is obj), None)\n+\n+    # @instance.memoize\n+    def get_id_or_attr_name(self, oid, parent_oid=None):\n+        identifier = self.get_id(oid)\n+        if identifier:\n+            return identifier\n+\n+        return self.get_attr_name(oid, parent_oid) if parent_oid else None\n+\n+    def load_reference_tree(self):\n+        path = self._get_reference_cache_path()\n+        if os.path.exists(path):\n+            with open(path, \'r\') as f:\n+                logger.info(\'Loading json reference-cache from {}\'.format(path))\n+                self.refs = json.load(f)\n+        else:\n+            self._build_ref_tree()\n+            self._store_reference_cache()\n+\n+    def _store_reference_cache(self):\n+        path = self._get_reference_cache_path()\n+        dirname = os.path.dirname(path)\n+        if not os.path.exists(dirname):\n+            os.makedirs(dirname)\n+        with open(path, \'w\') as f:\n+            json.dump(self.refs, f)\n+        logger.info(\'Save reference-cache as {}\'.format(path))\n+\n+    def _get_reference_cache_path(self):\n+        cache_dir = os.path.join(os.path.expanduser(\'~\'), \'.cache\', \'zodbverify\')\n+        last_tid = tid_repr(self.storage.lastTransaction())\n+        return os.path.join(cache_dir, \'zodb_references_{}.json\'.format(last_tid))\n+\n+\n def verify_oid(storage, oid, debug=False, app=None):\n     if not IStorageCurrentRecordIteration.providedBy(storage):\n         raise TypeError(\n@@ -22,14 +196,12 @@ def verify_oid(storage, oid, debug=False, app=None):\n     try:\n         # by default expect a 8-byte string (e.g. \'0x22d17d\')\n         # transform to a 64-bit long integer (e.g. b\'\\x00\\x00\\x00\\x00\\x00"\\xd1}\')\n-        as_int = int(oid, 0)\n-        oid = p64(as_int)\n-    except ValueError:\n-        # probably already a 64-bit long integer\n+        oid = repr_to_oid(oid)\n+    except:\n         pass\n \n     if app:\n-        # use exitsing zope instance.\n+        # use existing zope instance.\n         # only available when used as ./bin/instance zodbverify -o XXX\n         connection = app._p_jar\n     else:\n@@ -60,3 +232,7 @@ def verify_oid(storage, oid, debug=False, app=None):\n     success, msg = verify_record(oid, pickle, debug)\n     if not success:\n         logger.info(\'{}: {}\'.format(msg, oid_repr(oid)))\n+\n+    refbuilder = Refbuilder(storage, connection)\n+    refbuilder.load_reference_tree()\n+    refbuilder.get_oid_report(oid_repr(oid), verbose=True)\n'