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

    size = 0;
    for (int i = 0; i < results_.size(); i++) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, results_.get(i));
    }
    if (((bitField0_ & 0x00000001) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getTotalBilledTime());
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      size +=
          com.google.protobuf.CodedOutputStream.computeMessageSize(7, getSpeechAdaptationInfo());
    }
    if (requestId_ != 0L) {
      size += com.google.protobuf.CodedOutputStream.computeInt64Size(8, requestId_);
    }
    if (usingLegacyModels_ != false) {
      size += com.google.protobuf.CodedOutputStream.computeBoolSize(9, usingLegacyModels_);
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
Whether request used legacy asr models (was not automatically migrated to
use conformer models).
</pre>

<code>bool using_legacy_models = 9;</code>

@return The usingLegacyModels.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/RecognizeResponse.java