private void ensurePhraseSetsIsMutable() {
      if (!((bitField0_ & 0x00000001) != 0)) {
        phraseSets_ =
            new java.util.ArrayList<
                com.google.cloud.speech.v2.SpeechAdaptation.AdaptationPhraseSet>(phraseSets_);
        bitField0_ |= 0x00000001;
      }
    }
<pre>
Provides "hints" to the speech recognizer to favor specific words and phrases
in the results. PhraseSets can be specified as an inline resource, or a
reference to an existing PhraseSet resource.
</pre>

Protobuf type {@code google.cloud.speech.v2.SpeechAdaptation}
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/SpeechAdaptation.java