private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.speech.v2.CreatePhraseSetRequest,
            com.google.cloud.speech.v2.CreatePhraseSetRequest.Builder,
            com.google.cloud.speech.v2.CreatePhraseSetRequestOrBuilder>
        getCreatePhraseSetRequestFieldBuilder() {
      if (createPhraseSetRequestBuilder_ == null) {
        if (!(requestCase_ == 17)) {
          request_ = com.google.cloud.speech.v2.CreatePhraseSetRequest.getDefaultInstance();
        }
        createPhraseSetRequestBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.speech.v2.CreatePhraseSetRequest,
                com.google.cloud.speech.v2.CreatePhraseSetRequest.Builder,
                com.google.cloud.speech.v2.CreatePhraseSetRequestOrBuilder>(
                (com.google.cloud.speech.v2.CreatePhraseSetRequest) request_,
                getParentForChildren(),
                isClean());
        request_ = null;
      }
      requestCase_ = 17;
      onChanged();
      return createPhraseSetRequestBuilder_;
    }
<pre>
The CreatePhraseSetRequest that spawned the Operation.
</pre>

<code>.google.cloud.speech.v2.CreatePhraseSetRequest create_phrase_set_request = 17;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/OperationMetadata.java