diff --git a/packages/google-analytics-data/protos/google/analytics/data/v1alpha/data.proto b/packages/google-analytics-data/protos/google/analytics/data/v1alpha/data.proto
index 1ec409c3ca8..ba0aa334128 100644
--- a/packages/google-analytics-data/protos/google/analytics/data/v1alpha/data.proto
+++ b/packages/google-analytics-data/protos/google/analytics/data/v1alpha/data.proto
@@ -201,6 +201,9 @@ message Filter {
 
     // A filter for between two values.
     BetweenFilter between_filter = 5;
+
+    // A filter for empty values such as "(not set)" and "" values.
+    EmptyFilter empty_filter = 6;
   }
 }
 
@@ -341,6 +344,9 @@ message BetweenFilter {
   NumericValue to_value = 2;
 }
 
+// Filter for empty values.
+message EmptyFilter {}
+
 // To represent a number.
 message NumericValue {
   // One of a numeric value
@@ -554,6 +560,16 @@ message ResponseMetaData {
   // Demographics and
   // Interests](https://support.google.com/analytics/answer/2799357).
   optional bool subject_to_thresholding = 8;
+
+  // If this report's results are
+  // [sampled](https://support.google.com/analytics/answer/13331292), this
+  // describes the percentage of events used in this report. One
+  // `samplingMetadatas` is populated for each date range. Each
+  // `samplingMetadatas` corresponds to a date range in the order that date
+  // ranges were specified in the request.
+  //
+  // However if the results are not sampled, this field will not be defined.
+  repeated SamplingMetadata sampling_metadatas = 9;
 }
 
 // Describes a dimension column in the report. Dimensions requested in a report
@@ -1472,8 +1488,8 @@ message FunnelResponseMetadata {
   // [sampled](https://support.google.com/analytics/answer/13331292), this
   // describes what percentage of events were used in this funnel report. One
   // `samplingMetadatas` is populated for each date range. Each
-  // `samplingMetadatas` corresponds to a date range in order that date ranges
-  // were specified in the request.
+  // `samplingMetadatas` corresponds to a date range in the order that date
+  // ranges were specified in the request.
   //
   // However if the results are not sampled, this field will not be defined.
   repeated SamplingMetadata sampling_metadatas = 1;
diff --git a/packages/google-analytics-data/protos/protos.d.ts b/packages/google-analytics-data/protos/protos.d.ts
index 9f0b74c14e6..429c6f86046 100644
--- a/packages/google-analytics-data/protos/protos.d.ts
+++ b/packages/google-analytics-data/protos/protos.d.ts
@@ -9518,6 +9518,9 @@ export namespace google {
 
                     /** Filter betweenFilter */
                     betweenFilter?: (google.analytics.data.v1alpha.IBetweenFilter|null);
+
+                    /** Filter emptyFilter */
+                    emptyFilter?: (google.analytics.data.v1alpha.IEmptyFilter|null);
                 }
 
                 /** Represents a Filter. */
@@ -9544,8 +9547,11 @@ export namespace google {
                     /** Filter betweenFilter. */
                     public betweenFilter?: (google.analytics.data.v1alpha.IBetweenFilter|null);
 
+                    /** Filter emptyFilter. */
+                    public emptyFilter?: (google.analytics.data.v1alpha.IEmptyFilter|null);
+
                     /** Filter oneFilter. */
-                    public oneFilter?: ("stringFilter"|"inListFilter"|"numericFilter"|"betweenFilter");
+                    public oneFilter?: ("stringFilter"|"inListFilter"|"numericFilter"|"betweenFilter"|"emptyFilter");
 
                     /**
                      * Creates a new Filter instance using the specified properties.
@@ -10396,6 +10402,97 @@ export namespace google {
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
+                /** Properties of an EmptyFilter. */
+                interface IEmptyFilter {
+                }
+
+                /** Represents an EmptyFilter. */
+                class EmptyFilter implements IEmptyFilter {
+
+                    /**
+                     * Constructs a new EmptyFilter.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.analytics.data.v1alpha.IEmptyFilter);
+
+                    /**
+                     * Creates a new EmptyFilter instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns EmptyFilter instance
+                     */
+                    public static create(properties?: google.analytics.data.v1alpha.IEmptyFilter): google.analytics.data.v1alpha.EmptyFilter;
+
+                    /**
+                     * Encodes the specified EmptyFilter message. Does not implicitly {@link google.analytics.data.v1alpha.EmptyFilter.verify|verify} messages.
+                     * @param message EmptyFilter message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.analytics.data.v1alpha.IEmptyFilter, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified EmptyFilter message, length delimited. Does not implicitly {@link google.analytics.data.v1alpha.EmptyFilter.verify|verify} messages.
+                     * @param message EmptyFilter message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.analytics.data.v1alpha.IEmptyFilter, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes an EmptyFilter message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns EmptyFilter
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.analytics.data.v1alpha.EmptyFilter;
+
+                    /**
+                     * Decodes an EmptyFilter message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns EmptyFilter
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.analytics.data.v1alpha.EmptyFilter;
+
+                    /**
+                     * Verifies an EmptyFilter message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates an EmptyFilter message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns EmptyFilter
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.analytics.data.v1alpha.EmptyFilter;
+
+                    /**
+                     * Creates a plain object from an EmptyFilter message. Also converts values to other types if specified.
+                     * @param message EmptyFilter
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.analytics.data.v1alpha.EmptyFilter, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this EmptyFilter to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
+
+                    /**
+                     * Gets the default type url for EmptyFilter
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
+
                 /** Properties of a NumericValue. */
                 interface INumericValue {
 
@@ -10957,6 +11054,9 @@ export namespace google {
 
                     /** ResponseMetaData subjectToThresholding */
                     subjectToThresholding?: (boolean|null);
+
+                    /** ResponseMetaData samplingMetadatas */
+                    samplingMetadatas?: (google.analytics.data.v1alpha.ISamplingMetadata[]|null);
                 }
 
                 /** Represents a ResponseMetaData. */
@@ -10986,6 +11086,9 @@ export namespace google {
                     /** ResponseMetaData subjectToThresholding. */
                     public subjectToThresholding?: (boolean|null);
 
+                    /** ResponseMetaData samplingMetadatas. */
+                    public samplingMetadatas: google.analytics.data.v1alpha.ISamplingMetadata[];
+
                     /** ResponseMetaData _schemaRestrictionResponse. */
                     public _schemaRestrictionResponse?: "schemaRestrictionResponse";
 
diff --git a/packages/google-analytics-data/protos/protos.js b/packages/google-analytics-data/protos/protos.js
index 701c7aa24d2..b69993f40a9 100644
--- a/packages/google-analytics-data/protos/protos.js
+++ b/packages/google-analytics-data/protos/protos.js
@@ -25420,6 +25420,7 @@
                          * @property {google.analytics.data.v1alpha.IInListFilter|null} [inListFilter] Filter inListFilter
                          * @property {google.analytics.data.v1alpha.INumericFilter|null} [numericFilter] Filter numericFilter
                          * @property {google.analytics.data.v1alpha.IBetweenFilter|null} [betweenFilter] Filter betweenFilter
+                         * @property {google.analytics.data.v1alpha.IEmptyFilter|null} [emptyFilter] Filter emptyFilter
                          */
     
                         /**
@@ -25477,17 +25478,25 @@
                          */
                         Filter.prototype.betweenFilter = null;
     
+                        /**
+                         * Filter emptyFilter.
+                         * @member {google.analytics.data.v1alpha.IEmptyFilter|null|undefined} emptyFilter
+                         * @memberof google.analytics.data.v1alpha.Filter
+                         * @instance
+                         */
+                        Filter.prototype.emptyFilter = null;
+    
                         // OneOf field names bound to virtual getters and setters
                         var $oneOfFields;
     
                         /**
                          * Filter oneFilter.
-                         * @member {"stringFilter"|"inListFilter"|"numericFilter"|"betweenFilter"|undefined} oneFilter
+                         * @member {"stringFilter"|"inListFilter"|"numericFilter"|"betweenFilter"|"emptyFilter"|undefined} oneFilter
                          * @memberof google.analytics.data.v1alpha.Filter
                          * @instance
                          */
                         Object.defineProperty(Filter.prototype, "oneFilter", {
-                            get: $util.oneOfGetter($oneOfFields = ["stringFilter", "inListFilter", "numericFilter", "betweenFilter"]),
+                            get: $util.oneOfGetter($oneOfFields = ["stringFilter", "inListFilter", "numericFilter", "betweenFilter", "emptyFilter"]),
                             set: $util.oneOfSetter($oneOfFields)
                         });
     
@@ -25525,6 +25534,8 @@
                                 $root.google.analytics.data.v1alpha.NumericFilter.encode(message.numericFilter, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
                             if (message.betweenFilter != null && Object.hasOwnProperty.call(message, "betweenFilter"))
                                 $root.google.analytics.data.v1alpha.BetweenFilter.encode(message.betweenFilter, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                            if (message.emptyFilter != null && Object.hasOwnProperty.call(message, "emptyFilter"))
+                                $root.google.analytics.data.v1alpha.EmptyFilter.encode(message.emptyFilter, writer.uint32(/* id 6, wireType 2 =*/50).fork()).ldelim();
                             return writer;
                         };
     
@@ -25579,6 +25590,10 @@
                                         message.betweenFilter = $root.google.analytics.data.v1alpha.BetweenFilter.decode(reader, reader.uint32());
                                         break;
                                     }
+                                case 6: {
+                                        message.emptyFilter = $root.google.analytics.data.v1alpha.EmptyFilter.decode(reader, reader.uint32());
+                                        break;
+                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -25656,6 +25671,16 @@
                                         return "betweenFilter." + error;
                                 }
                             }
+                            if (message.emptyFilter != null && message.hasOwnProperty("emptyFilter")) {
+                                if (properties.oneFilter === 1)
+                                    return "oneFilter: multiple values";
+                                properties.oneFilter = 1;
+                                {
+                                    var error = $root.google.analytics.data.v1alpha.EmptyFilter.verify(message.emptyFilter);
+                                    if (error)
+                                        return "emptyFilter." + error;
+                                }
+                            }
                             return null;
                         };
     
@@ -25693,6 +25718,11 @@
                                     throw TypeError(".google.analytics.data.v1alpha.Filter.betweenFilter: object expected");
                                 message.betweenFilter = $root.google.analytics.data.v1alpha.BetweenFilter.fromObject(object.betweenFilter);
                             }
+                            if (object.emptyFilter != null) {
+                                if (typeof object.emptyFilter !== "object")
+                                    throw TypeError(".google.analytics.data.v1alpha.Filter.emptyFilter: object expected");
+                                message.emptyFilter = $root.google.analytics.data.v1alpha.EmptyFilter.fromObject(object.emptyFilter);
+                            }
                             return message;
                         };
     
@@ -25733,6 +25763,11 @@
                                 if (options.oneofs)
                                     object.oneFilter = "betweenFilter";
                             }
+                            if (message.emptyFilter != null && message.hasOwnProperty("emptyFilter")) {
+                                object.emptyFilter = $root.google.analytics.data.v1alpha.EmptyFilter.toObject(message.emptyFilter, options);
+                                if (options.oneofs)
+                                    object.oneFilter = "emptyFilter";
+                            }
                             return object;
                         };
     
@@ -27619,6 +27654,181 @@
                         return BetweenFilter;
                     })();
     
+                    v1alpha.EmptyFilter = (function() {
+    
+                        /**
+                         * Properties of an EmptyFilter.
+                         * @memberof google.analytics.data.v1alpha
+                         * @interface IEmptyFilter
+                         */
+    
+                        /**
+                         * Constructs a new EmptyFilter.
+                         * @memberof google.analytics.data.v1alpha
+                         * @classdesc Represents an EmptyFilter.
+                         * @implements IEmptyFilter
+                         * @constructor
+                         * @param {google.analytics.data.v1alpha.IEmptyFilter=} [properties] Properties to set
+                         */
+                        function EmptyFilter(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * Creates a new EmptyFilter instance using the specified properties.
+                         * @function create
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {google.analytics.data.v1alpha.IEmptyFilter=} [properties] Properties to set
+                         * @returns {google.analytics.data.v1alpha.EmptyFilter} EmptyFilter instance
+                         */
+                        EmptyFilter.create = function create(properties) {
+                            return new EmptyFilter(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified EmptyFilter message. Does not implicitly {@link google.analytics.data.v1alpha.EmptyFilter.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {google.analytics.data.v1alpha.IEmptyFilter} message EmptyFilter message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        EmptyFilter.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified EmptyFilter message, length delimited. Does not implicitly {@link google.analytics.data.v1alpha.EmptyFilter.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {google.analytics.data.v1alpha.IEmptyFilter} message EmptyFilter message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        EmptyFilter.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes an EmptyFilter message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.analytics.data.v1alpha.EmptyFilter} EmptyFilter
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        EmptyFilter.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.analytics.data.v1alpha.EmptyFilter();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes an EmptyFilter message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.analytics.data.v1alpha.EmptyFilter} EmptyFilter
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        EmptyFilter.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies an EmptyFilter message.
+                         * @function verify
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        EmptyFilter.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            return null;
+                        };
+    
+                        /**
+                         * Creates an EmptyFilter message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.analytics.data.v1alpha.EmptyFilter} EmptyFilter
+                         */
+                        EmptyFilter.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.analytics.data.v1alpha.EmptyFilter)
+                                return object;
+                            return new $root.google.analytics.data.v1alpha.EmptyFilter();
+                        };
+    
+                        /**
+                         * Creates a plain object from an EmptyFilter message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {google.analytics.data.v1alpha.EmptyFilter} message EmptyFilter
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        EmptyFilter.toObject = function toObject() {
+                            return {};
+                        };
+    
+                        /**
+                         * Converts this EmptyFilter to JSON.
+                         * @function toJSON
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        EmptyFilter.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for EmptyFilter
+                         * @function getTypeUrl
+                         * @memberof google.analytics.data.v1alpha.EmptyFilter
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        EmptyFilter.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.analytics.data.v1alpha.EmptyFilter";
+                        };
+    
+                        return EmptyFilter;
+                    })();
+    
                     v1alpha.NumericValue = (function() {
     
                         /**
@@ -28928,6 +29138,7 @@
                          * @property {string|null} [timeZone] ResponseMetaData timeZone
                          * @property {string|null} [emptyReason] ResponseMetaData emptyReason
                          * @property {boolean|null} [subjectToThresholding] ResponseMetaData subjectToThresholding
+                         * @property {Array.<google.analytics.data.v1alpha.ISamplingMetadata>|null} [samplingMetadatas] ResponseMetaData samplingMetadatas
                          */
     
                         /**
@@ -28939,6 +29150,7 @@
                          * @param {google.analytics.data.v1alpha.IResponseMetaData=} [properties] Properties to set
                          */
                         function ResponseMetaData(properties) {
+                            this.samplingMetadatas = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -28993,6 +29205,14 @@
                          */
                         ResponseMetaData.prototype.subjectToThresholding = null;
     
+                        /**
+                         * ResponseMetaData samplingMetadatas.
+                         * @member {Array.<google.analytics.data.v1alpha.ISamplingMetadata>} samplingMetadatas
+                         * @memberof google.analytics.data.v1alpha.ResponseMetaData
+                         * @instance
+                         */
+                        ResponseMetaData.prototype.samplingMetadatas = $util.emptyArray;
+    
                         // OneOf field names bound to virtual getters and setters
                         var $oneOfFields;
     
@@ -29087,6 +29307,9 @@
                                 writer.uint32(/* id 7, wireType 2 =*/58).string(message.emptyReason);
                             if (message.subjectToThresholding != null && Object.hasOwnProperty.call(message, "subjectToThresholding"))
                                 writer.uint32(/* id 8, wireType 0 =*/64).bool(message.subjectToThresholding);
+                            if (message.samplingMetadatas != null && message.samplingMetadatas.length)
+                                for (var i = 0; i < message.samplingMetadatas.length; ++i)
+                                    $root.google.analytics.data.v1alpha.SamplingMetadata.encode(message.samplingMetadatas[i], writer.uint32(/* id 9, wireType 2 =*/74).fork()).ldelim();
                             return writer;
                         };
     
@@ -29145,6 +29368,12 @@
                                         message.subjectToThresholding = reader.bool();
                                         break;
                                     }
+                                case 9: {
+                                        if (!(message.samplingMetadatas && message.samplingMetadatas.length))
+                                            message.samplingMetadatas = [];
+                                        message.samplingMetadatas.push($root.google.analytics.data.v1alpha.SamplingMetadata.decode(reader, reader.uint32()));
+                                        break;
+                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -29212,6 +29441,15 @@
                                 if (typeof message.subjectToThresholding !== "boolean")
                                     return "subjectToThresholding: boolean expected";
                             }
+                            if (message.samplingMetadatas != null && message.hasOwnProperty("samplingMetadatas")) {
+                                if (!Array.isArray(message.samplingMetadatas))
+                                    return "samplingMetadatas: array expected";
+                                for (var i = 0; i < message.samplingMetadatas.length; ++i) {
+                                    var error = $root.google.analytics.data.v1alpha.SamplingMetadata.verify(message.samplingMetadatas[i]);
+                                    if (error)
+                                        return "samplingMetadatas." + error;
+                                }
+                            }
                             return null;
                         };
     
@@ -29242,6 +29480,16 @@
                                 message.emptyReason = String(object.emptyReason);
                             if (object.subjectToThresholding != null)
                                 message.subjectToThresholding = Boolean(object.subjectToThresholding);
+                            if (object.samplingMetadatas) {
+                                if (!Array.isArray(object.samplingMetadatas))
+                                    throw TypeError(".google.analytics.data.v1alpha.ResponseMetaData.samplingMetadatas: array expected");
+                                message.samplingMetadatas = [];
+                                for (var i = 0; i < object.samplingMetadatas.length; ++i) {
+                                    if (typeof object.samplingMetadatas[i] !== "object")
+                                        throw TypeError(".google.analytics.data.v1alpha.ResponseMetaData.samplingMetadatas: object expected");
+                                    message.samplingMetadatas[i] = $root.google.analytics.data.v1alpha.SamplingMetadata.fromObject(object.samplingMetadatas[i]);
+                                }
+                            }
                             return message;
                         };
     
@@ -29258,6 +29506,8 @@
                             if (!options)
                                 options = {};
                             var object = {};
+                            if (options.arrays || options.defaults)
+                                object.samplingMetadatas = [];
                             if (options.defaults)
                                 object.dataLossFromOtherRow = false;
                             if (message.dataLossFromOtherRow != null && message.hasOwnProperty("dataLossFromOtherRow"))
@@ -29287,6 +29537,11 @@
                                 if (options.oneofs)
                                     object._subjectToThresholding = "subjectToThresholding";
                             }
+                            if (message.samplingMetadatas && message.samplingMetadatas.length) {
+                                object.samplingMetadatas = [];
+                                for (var j = 0; j < message.samplingMetadatas.length; ++j)
+                                    object.samplingMetadatas[j] = $root.google.analytics.data.v1alpha.SamplingMetadata.toObject(message.samplingMetadatas[j], options);
+                            }
                             return object;
                         };
     
diff --git a/packages/google-analytics-data/protos/protos.json b/packages/google-analytics-data/protos/protos.json
index 6ca40148e35..d44d39e103f 100644
--- a/packages/google-analytics-data/protos/protos.json
+++ b/packages/google-analytics-data/protos/protos.json
@@ -2878,7 +2878,8 @@
                             "stringFilter",
                             "inListFilter",
                             "numericFilter",
-                            "betweenFilter"
+                            "betweenFilter",
+                            "emptyFilter"
                           ]
                         }
                       },
@@ -2902,6 +2903,10 @@
                         "betweenFilter": {
                           "type": "BetweenFilter",
                           "id": 5
+                        },
+                        "emptyFilter": {
+                          "type": "EmptyFilter",
+                          "id": 6
                         }
                       }
                     },
@@ -3039,6 +3044,9 @@
                         }
                       }
                     },
+                    "EmptyFilter": {
+                      "fields": {}
+                    },
                     "NumericValue": {
                       "oneofs": {
                         "oneValue": {
@@ -3193,6 +3201,11 @@
                           "options": {
                             "proto3_optional": true
                           }
+                        },
+                        "samplingMetadatas": {
+                          "rule": "repeated",
+                          "type": "SamplingMetadata",
+                          "id": 9
                         }
                       },
                       "nested": {