public Builder setDeleteTime(com.google.protobuf.Timestamp value) {
      if (deleteTimeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        deleteTime_ = value;
      } else {
        deleteTimeBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000100;
      onChanged();
      return this;
    }
<pre>
Output only. The time at which this resource was requested for deletion.
This field is not used.
</pre>

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