public Builder setEtag(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      etag_ = value;
      bitField0_ |= 0x00001000;
      onChanged();
      return this;
    }
<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.
</pre>

<code>string etag = 12 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@param value The etag to set.
@return This builder for chaining.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/Recognizer.java