public Builder setContent(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      audioSourceCase_ = 5;
      audioSource_ = value;
      onChanged();
      return this;
    }
<pre>
The audio data bytes encoded as specified in
[RecognitionConfig][google.cloud.speech.v2.RecognitionConfig]. As
with all bytes fields, proto buffers use a pure binary representation,
whereas JSON representations use base64.
</pre>

<code>bytes content = 5;</code>

@param value The content to set.
@return This builder for chaining.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/RecognizeRequest.java