@java.lang.Override
    public com.google.cloud.storagebatchoperations.v1.PutMetadataOrBuilder
        getPutMetadataOrBuilder() {
      if ((transformationCase_ == 8) && (putMetadataBuilder_ != null)) {
        return putMetadataBuilder_.getMessageOrBuilder();
      } else {
        if (transformationCase_ == 8) {
          return (com.google.cloud.storagebatchoperations.v1.PutMetadata) transformation_;
        }
        return com.google.cloud.storagebatchoperations.v1.PutMetadata.getDefaultInstance();
      }
    }
<pre>
Updates object metadata. Allows updating fixed-key and custom metadata
and fixed-key metadata i.e. Cache-Control, Content-Disposition,
Content-Encoding, Content-Language, Content-Type, Custom-Time.
</pre>

<code>.google.cloud.storagebatchoperations.v1.PutMetadata put_metadata = 8;</code>
java-storagebatchoperations/proto-google-cloud-storagebatchoperations-v1/src/main/java/com/google/cloud/storagebatchoperations/v1/Job.java