public com.google.protobuf.ByteString getPhraseBytes() {
      java.lang.Object ref = phrase_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        phrase_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
The phrase to which the customization will be applied.
The phrase can be multiple words (in the case of proper nouns etc), but
should not span to a whole sentence.
</pre>

<code>optional string phrase = 1;</code>

@return The bytes for phrase.
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/CustomPronunciationParams.java