private void ensurePhrasesIsMutable() {
      if (!((bitField0_ & 0x00000004) != 0)) {
        phrases_ = new java.util.ArrayList<com.google.cloud.speech.v2.PhraseSet.Phrase>(phrases_);
        bitField0_ |= 0x00000004;
      }
    }
<pre>
Output only. System-assigned unique identifier for the PhraseSet.
</pre>

<code>string uid = 2 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@param value The bytes for uid to set.
@return This builder for chaining.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/PhraseSet.java