public Builder setTotalBilledTime(com.google.protobuf.Duration.Builder builderForValue) {
      if (totalBilledTimeBuilder_ == null) {
        totalBilledTime_ = builderForValue.build();
      } else {
        totalBilledTimeBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<pre>
When available, billed audio seconds for the corresponding request.
</pre>

<code>.google.protobuf.Duration total_billed_time = 3;</code>
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/LongRunningRecognizeResponse.java