@java.lang.Override
  public boolean hasExpireTime() {
    return ((bitField0_ & 0x00000002) != 0);
  }
<pre>
Output only. The time at which this resource will be purged.
This field is not used.
</pre>

<code>.google.protobuf.Timestamp expire_time = 13 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return Whether the expireTime field is set.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/PhraseSet.java