private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.speech.v2.ExplicitDecodingConfig,
            com.google.cloud.speech.v2.ExplicitDecodingConfig.Builder,
            com.google.cloud.speech.v2.ExplicitDecodingConfigOrBuilder>
        getExplicitDecodingConfigFieldBuilder() {
      if (explicitDecodingConfigBuilder_ == null) {
        if (!(decodingConfigCase_ == 8)) {
          decodingConfig_ = com.google.cloud.speech.v2.ExplicitDecodingConfig.getDefaultInstance();
        }
        explicitDecodingConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.speech.v2.ExplicitDecodingConfig,
                com.google.cloud.speech.v2.ExplicitDecodingConfig.Builder,
                com.google.cloud.speech.v2.ExplicitDecodingConfigOrBuilder>(
                (com.google.cloud.speech.v2.ExplicitDecodingConfig) decodingConfig_,
                getParentForChildren(),
                isClean());
        decodingConfig_ = null;
      }
      decodingConfigCase_ = 8;
      onChanged();
      return explicitDecodingConfigBuilder_;
    }
<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