public com.google.protobuf.Duration getTotalBilledTime() {
      if (totalBilledTimeBuilder_ == null) {
        return totalBilledTime_ == null
            ? com.google.protobuf.Duration.getDefaultInstance()
            : totalBilledTime_;
      } else {
        return totalBilledTimeBuilder_.getMessage();
      }
    }
<pre>
When available, billed audio seconds for the corresponding request.
</pre>

<code>.google.protobuf.Duration total_billed_time = 3;</code>

@return The totalBilledTime.
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/RecognizeResponse.java