public Builder clearContent() {
      if (audioSourceCase_ == 1) {
        audioSourceCase_ = 0;
        audioSource_ = null;
        onChanged();
      }
      return this;
    }
<pre>
The audio data bytes encoded as specified in
`RecognitionConfig`. Note: as with all bytes fields, proto buffers use a
pure binary representation, whereas JSON representations use base64.
</pre>

<code>bytes content = 1;</code>

@return This builder for chaining.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/RecognitionAudio.java