public com.google.cloud.speech.v1p1beta1.PhraseSet.Builder addPhraseSetsBuilder(int index) {
      return getPhraseSetsFieldBuilder()
          .addBuilder(index, com.google.cloud.speech.v1p1beta1.PhraseSet.getDefaultInstance());
    }
<pre>
A collection of phrase sets. To specify the hints inline, leave the
phrase set's `name` blank and fill in the rest of its fields. Any
phrase set can use any custom class.
</pre>

<code>repeated .google.cloud.speech.v1p1beta1.PhraseSet phrase_sets = 1;</code>
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/SpeechAdaptation.java