public Builder mergeUpdatePhraseSetRequest(
        com.google.cloud.speech.v2.UpdatePhraseSetRequest value) {
      if (updatePhraseSetRequestBuilder_ == null) {
        if (requestCase_ == 18
            && request_ != com.google.cloud.speech.v2.UpdatePhraseSetRequest.getDefaultInstance()) {
          request_ =
              com.google.cloud.speech.v2.UpdatePhraseSetRequest.newBuilder(
                      (com.google.cloud.speech.v2.UpdatePhraseSetRequest) request_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          request_ = value;
        }
        onChanged();
      } else {
        if (requestCase_ == 18) {
          updatePhraseSetRequestBuilder_.mergeFrom(value);
        } else {
          updatePhraseSetRequestBuilder_.setMessage(value);
        }
      }
      requestCase_ = 18;
      return this;
    }
<pre>
The UpdatePhraseSetRequest that spawned the Operation.
</pre>

<code>.google.cloud.speech.v2.UpdatePhraseSetRequest update_phrase_set_request = 18;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/OperationMetadata.java