@java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    for (java.util.Map.Entry<java.lang.String, com.google.cloud.speech.v2.BatchRecognizeFileResult>
        entry : internalGetResults().getMap().entrySet()) {
      com.google.protobuf.MapEntry<
              java.lang.String, com.google.cloud.speech.v2.BatchRecognizeFileResult>
          results__ =
              ResultsDefaultEntryHolder.defaultEntry
                  .newBuilderForType()
                  .setKey(entry.getKey())
                  .setValue(entry.getValue())
                  .build();
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, results__);
    }
    if (((bitField0_ & 0x00000001) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getTotalBilledDuration());
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
When available, billed audio seconds for the corresponding request.
</pre>

<code>.google.protobuf.Duration total_billed_duration = 2;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/BatchRecognizeResponse.java