public Builder mergeConfig(com.google.cloud.speech.v2.RecognitionConfig value) {
      if (configBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && config_ != null
            && config_ != com.google.cloud.speech.v2.RecognitionConfig.getDefaultInstance()) {
          getConfigBuilder().mergeFrom(value);
        } else {
          config_ = value;
        }
      } else {
        configBuilder_.mergeFrom(value);
      }
      if (config_ != null) {
        bitField0_ |= 0x00000002;
        onChanged();
      }
      return this;
    }
<pre>
Features and audio metadata to use for the Automatic Speech Recognition.
This field in combination with the
[config_mask][google.cloud.speech.v2.RecognizeRequest.config_mask] field
can be used to override parts of the
[default_recognition_config][google.cloud.speech.v2.Recognizer.default_recognition_config]
of the Recognizer resource.
</pre>

<code>.google.cloud.speech.v2.RecognitionConfig config = 1;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognizeRequest.java