public Builder clearConfig() {
      bitField0_ = (bitField0_ & ~0x00000001);
      config_ = null;
      if (configBuilder_ != null) {
        configBuilder_.dispose();
        configBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Required. Provides information to the recognizer that specifies how to
process the request.
</pre>

<code>
.google.cloud.speech.v1p1beta1.RecognitionConfig config = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/LongRunningRecognizeRequest.java