{
  "nested": {
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      "nested": {
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          "nested": {
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                "csharp_namespace": "Google.Cloud.PubSub.V1",
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                "java_outer_classname": "SchemaProto",
                "java_package": "com.google.pubsub.v1",
                "php_namespace": "Google\\Cloud\\PubSub\\V1",
                "ruby_package": "Google::Cloud::PubSub::V1"
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                        {
                          "(google.api.http)": {
                            "post": "/v1/{subscription=projects/*/subscriptions/*}:detach"
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                },
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                        "(google.api.field_behavior)": "REQUIRED",
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                },
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                "PubsubMessage": {
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                          "(google.api.http)": {
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                        {
                          "(google.api.method_signature)": "subscription,ack_ids,ack_deadline_seconds"
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                      ]
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                          "(google.api.http)": {
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                          "(google.api.method_signature)": "subscription,ack_ids"
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                    "Pull": {
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                          "(google.api.http)": {
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                          "(google.api.method_signature)": "subscription,return_immediately,max_messages"
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                          "(google.api.method_signature)": "subscription,max_messages"
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                    "StreamingPull": {
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                      "responseType": "StreamingPullResponse",
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                    },
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                      "requestType": "ModifyPushConfigRequest",
                      "responseType": "google.protobuf.Empty",
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                          "(google.api.http)": {
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                          "(google.api.method_signature)": "project"
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                      ]
                    },
                    "CreateSnapshot": {
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                            "put": "/v1/{name=projects/*/snapshots/*}",
                            "body": "*"
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                        },
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                          "(google.api.method_signature)": "name,subscription"
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                          "(google.api.http)": {
                            "patch": "/v1/{snapshot.name=projects/*/snapshots/*}",
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                      ]
                    },
                    "DeleteSnapshot": {
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                      "responseType": "google.protobuf.Empty",
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                      },
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                          "(google.api.http)": {
                            "delete": "/v1/{snapshot=projects/*/snapshots/*}"
                          }
                        },
                        {
                          "(google.api.method_signature)": "snapshot"
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                      ]
                    },
                    "Seek": {
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                      "responseType": "SeekResponse",
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                      },
                      "parsedOptions": [
                        {
                          "(google.api.http)": {
                            "post": "/v1/{subscription=projects/*/subscriptions/*}:seek",
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                      ]
                    }
                  }
                },
                "Subscription": {
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                    "(google.api.resource).type": "pubsub.googleapis.com/Subscription",
                    "(google.api.resource).pattern": "projects/{project}/subscriptions/{subscription}"
                  },
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                        "(google.api.field_behavior)": "REQUIRED"
                      }
                    },
                    "topic": {
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                        "(google.api.field_behavior)": "REQUIRED",
                        "(google.api.resource_reference).type": "pubsub.googleapis.com/Topic"
                      }
                    },
                    "pushConfig": {
                      "type": "PushConfig",
                      "id": 4
                    },
                    "ackDeadlineSeconds": {
                      "type": "int32",
                      "id": 5
                    },
                    "retainAckedMessages": {
                      "type": "bool",
                      "id": 7
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                    "messageRetentionDuration": {
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                    "labels": {
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                      "type": "string",
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                    "enableMessageOrdering": {
                      "type": "bool",
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                    },
                    "expirationPolicy": {
                      "type": "ExpirationPolicy",
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                    },
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                      "type": "string",
                      "id": 12
                    },
                    "deadLetterPolicy": {
                      "type": "DeadLetterPolicy",
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                    },
                    "retryPolicy": {
                      "type": "RetryPolicy",
                      "id": 14
                    },
                    "detached": {
                      "type": "bool",
                      "id": 15
                    },
                    "enableExactlyOnceDelivery": {
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                      "id": 16
                    },
                    "topicMessageRetentionDuration": {
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                        "(google.api.field_behavior)": "OUTPUT_ONLY"
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                },
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                    "maximumBackoff": {
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                      "id": 2
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                  }
                },
                "DeadLetterPolicy": {
                  "fields": {
                    "deadLetterTopic": {
                      "type": "string",
                      "id": 1
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                    "maxDeliveryAttempts": {
                      "type": "int32",
                      "id": 2
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                },
                "ExpirationPolicy": {
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                      "id": 1
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                  }
                },
                "PushConfig": {
                  "oneofs": {
                    "authenticationMethod": {
                      "oneof": [
                        "oidcToken"
                      ]
                    }
                  },
                  "fields": {
                    "pushEndpoint": {
                      "type": "string",
                      "id": 1
                    },
                    "attributes": {
                      "keyType": "string",
                      "type": "string",
                      "id": 2
                    },
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