public com.google.protobuf.ByteString getOutputDisplayNameBytes() {
      java.lang.Object ref = outputDisplayName_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        outputDisplayName_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Output only. The display name of the output identified by
[output_index][google.cloud.aiplatform.v1.Attribution.output_index]. For
example, the predicted class name by a multi-classification Model.

This field is only populated iff the Model predicts display names as a
separate field along with the explained output. The predicted display name
must has the same shape of the explained output, and can be located using
output_index.
</pre>

<code>string output_display_name = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The bytes for outputDisplayName.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Attribution.java