public Builder addPhraseSets(com.google.cloud.speech.v1.PhraseSet value) {
      if (phraseSetsBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensurePhraseSetsIsMutable();
        phraseSets_.add(value);
        onChanged();
      } else {
        phraseSetsBuilder_.addMessage(value);
      }
      return this;
    }
<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.v1.PhraseSet phrase_sets = 1;</code>
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/SpeechAdaptation.java