public static com.google.cloud.workflows.v1beta.UpdateWorkflowRequest parseFrom(
      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }
<pre>
List of fields to be updated. If not present, the entire workflow
will be updated.
</pre>

<code>.google.protobuf.FieldMask update_mask = 2;</code>
java-workflows/proto-google-cloud-workflows-v1beta/src/main/java/com/google/cloud/workflows/v1beta/UpdateWorkflowRequest.java