public Builder clearExplicitDecodingConfig() {
      if (explicitDecodingConfigBuilder_ == null) {
        if (decodingConfigCase_ == 8) {
          decodingConfigCase_ = 0;
          decodingConfig_ = null;
          onChanged();
        }
      } else {
        if (decodingConfigCase_ == 8) {
          decodingConfigCase_ = 0;
          decodingConfig_ = null;
        }
        explicitDecodingConfigBuilder_.clear();
      }
      return this;
    }
<pre>
Explicitly specified decoding parameters.
Required if using headerless PCM audio (linear16, mulaw, alaw).
</pre>

<code>.google.cloud.speech.v2.ExplicitDecodingConfig explicit_decoding_config = 8;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognitionConfig.java