public Builder mergeExplicitDecodingConfig(
        com.google.cloud.speech.v2.ExplicitDecodingConfig value) {
      if (explicitDecodingConfigBuilder_ == null) {
        if (decodingConfigCase_ == 8
            && decodingConfig_
                != com.google.cloud.speech.v2.ExplicitDecodingConfig.getDefaultInstance()) {
          decodingConfig_ =
              com.google.cloud.speech.v2.ExplicitDecodingConfig.newBuilder(
                      (com.google.cloud.speech.v2.ExplicitDecodingConfig) decodingConfig_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          decodingConfig_ = value;
        }
        onChanged();
      } else {
        if (decodingConfigCase_ == 8) {
          explicitDecodingConfigBuilder_.mergeFrom(value);
        } else {
          explicitDecodingConfigBuilder_.setMessage(value);
        }
      }
      decodingConfigCase_ = 8;
      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