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diff --git a/third_party/googleapis/google/api/config_change.proto b/third_party/googleapis/google/api/config_change.proto
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+// Copyright 2015 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package google.api;
+
+option go_package = "google.golang.org/genproto/googleapis/api/configchange;configchange";
+option java_multiple_files = true;
+option java_outer_classname = "ConfigChangeProto";
+option java_package = "com.google.api";
+option objc_class_prefix = "GAPI";
+
+// Output generated from semantically comparing two versions of a service
+// configuration.
+//
+// Includes detailed information about a field that have changed with
+// applicable advice about potential consequences for the change, such as
+// backwards-incompatibility.
+message ConfigChange {
+  // Object hierarchy path to the change, with levels separated by a '.'
+  // character. For repeated fields, an applicable unique identifier field is
+  // used for the index (usually selector, name, or id). For maps, the term
+  // 'key' is used. If the field has no unique identifier, the numeric index
+  // is used.
+  // Examples:
+  // - visibility.rules[selector=="google.LibraryService.ListBooks"].restriction
+  // - quota.metric_rules[selector=="google"].metric_costs[key=="reads"].value
+  // - logging.producer_destinations[0]
+  string element = 1;
+
+  // Value of the changed object in the old Service configuration,
+  // in JSON format. This field will not be populated if ChangeType == ADDED.
+  string old_value = 2;
+
+  // Value of the changed object in the new Service configuration,
+  // in JSON format. This field will not be populated if ChangeType == REMOVED.
+  string new_value = 3;
+
+  // The type for this change, either ADDED, REMOVED, or MODIFIED.
+  ChangeType change_type = 4;
+
+  // Collection of advice provided for this change, useful for determining the
+  // possible impact of this change.
+  repeated Advice advices = 5;
+}
+
+// Generated advice about this change, used for providing more
+// information about how a change will affect the existing service.
+message Advice {
+  // Useful description for why this advice was applied and what actions should
+  // be taken to mitigate any implied risks.
+  string description = 2;
+}
+
+// Classifies set of possible modifications to an object in the service
+// configuration.
+enum ChangeType {
+  // No value was provided.
+  CHANGE_TYPE_UNSPECIFIED = 0;
+
+  // The changed object exists in the 'new' service configuration, but not
+  // in the 'old' service configuration.
+  ADDED = 1;
+
+  // The changed object exists in the 'old' service configuration, but not
+  // in the 'new' service configuration.
+  REMOVED = 2;
+
+  // The changed object exists in both service configurations, but its value
+  // is different.
+  MODIFIED = 3;
+}