public Builder setMetadata(com.google.cloud.speech.v2.RecognitionResponseMetadata value) {
      if (metadataBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        metadata_ = value;
      } else {
        metadataBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<pre>
Metadata about the recognition.
</pre>

<code>.google.cloud.speech.v2.RecognitionResponseMetadata metadata = 2;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/BatchRecognizeResults.java