public com.google.protobuf.TimestampOrBuilder getExpireTimeOrBuilder() {
      if (expireTimeBuilder_ != null) {
        return expireTimeBuilder_.getMessageOrBuilder();
      } else {
        return expireTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : expireTime_;
      }
    }
<pre>
Output only. The time at which this resource will be purged.
This field is not used.
</pre>

<code>
.google.protobuf.Timestamp expire_time = 12 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/CustomClass.java