@java.lang.Override
  public com.google.protobuf.Timestamp getExpireTime() {
    return expireTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : expireTime_;
  }
<pre>
Output only. The time at which this resource will be purged.
</pre>

<code>.google.protobuf.Timestamp expire_time = 9 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return The expireTime.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/PhraseSet.java