public Builder setTotalBilledTime(com.google.protobuf.Duration value) {
      if (totalBilledTimeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        totalBilledTime_ = value;
      } else {
        totalBilledTimeBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000010;
      onChanged();
      return this;
    }
<pre>
When available, billed audio seconds for the stream.
Set only if this is the last response in the stream.
</pre>

<code>.google.protobuf.Duration total_billed_time = 5;</code>
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/StreamingRecognizeResponse.java