@java.lang.Override
  public com.google.protobuf.ByteString getEtagBytes() {
    java.lang.Object ref = etag_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      etag_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
<pre>
Output only. This checksum is computed by the server based on the value of
other fields. This may be sent on update, undelete, and delete requests to
ensure the client has an up-to-date value before proceeding. This field is
not used.
</pre>

<code>string etag = 15 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The bytes for etag.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/PhraseSet.java