public Builder mergeOperationMetadata(com.google.cloud.visionai.v1.OperationMetadata value) {
      if (operationMetadataBuilder_ == null) {
        if (((bitField0_ & 0x00000001) != 0)
            && operationMetadata_ != null
            && operationMetadata_
                != com.google.cloud.visionai.v1.OperationMetadata.getDefaultInstance()) {
          getOperationMetadataBuilder().mergeFrom(value);
        } else {
          operationMetadata_ = value;
        }
      } else {
        operationMetadataBuilder_.mergeFrom(value);
      }
      if (operationMetadata_ != null) {
        bitField0_ |= 0x00000001;
        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