public Builder clearOperationMetadata() {
      bitField0_ = (bitField0_ & ~0x00000001);
      operationMetadata_ = null;
      if (operationMetadataBuilder_ != null) {
        operationMetadataBuilder_.dispose();
        operationMetadataBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Common metadata of the long-running operation.
</pre>

<code>.google.cloud.visionai.v1.OperationMetadata operation_metadata = 1;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/CreateCollectionMetadata.java