public com.google.protobuf.ByteString getOutputNameBytes() {
      java.lang.Object ref = outputName_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        outputName_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Output only. Name of the explain output. Specified as the key in
[ExplanationMetadata.outputs][google.cloud.aiplatform.v1.ExplanationMetadata.outputs].
</pre>

<code>string output_name = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

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