private com.google.protobuf.SingleFieldBuilderV3<
              com.google.storagetransfer.v1.proto.TransferTypes.MetadataOptions,
              com.google.storagetransfer.v1.proto.TransferTypes.MetadataOptions.Builder,
              com.google.storagetransfer.v1.proto.TransferTypes.MetadataOptionsOrBuilder>
          getMetadataOptionsFieldBuilder() {
        if (metadataOptionsBuilder_ == null) {
          metadataOptionsBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.storagetransfer.v1.proto.TransferTypes.MetadataOptions,
                  com.google.storagetransfer.v1.proto.TransferTypes.MetadataOptions.Builder,
                  com.google.storagetransfer.v1.proto.TransferTypes.MetadataOptionsOrBuilder>(
                  getMetadataOptions(), getParentForChildren(), isClean());
          metadataOptions_ = null;
        }
        return metadataOptionsBuilder_;
      }
<pre>
Represents the selected metadata options for a transfer job.
</pre>

<code>.google.storagetransfer.v1.MetadataOptions metadata_options = 5;</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java