private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.speech.v2.RecognitionFeatures,
            com.google.cloud.speech.v2.RecognitionFeatures.Builder,
            com.google.cloud.speech.v2.RecognitionFeaturesOrBuilder>
        getFeaturesFieldBuilder() {
      if (featuresBuilder_ == null) {
        featuresBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.speech.v2.RecognitionFeatures,
                com.google.cloud.speech.v2.RecognitionFeatures.Builder,
                com.google.cloud.speech.v2.RecognitionFeaturesOrBuilder>(
                getFeatures(), getParentForChildren(), isClean());
        features_ = null;
      }
      return featuresBuilder_;
    }
<pre>
Speech recognition features to enable.
</pre>

<code>.google.cloud.speech.v2.RecognitionFeatures features = 2;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognitionConfig.java