default void batchRecognize(
        com.google.cloud.speech.v2.BatchRecognizeRequest request,
        io.grpc.stub.StreamObserver<com.google.longrunning.Operation> responseObserver) {
      io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall(
          getBatchRecognizeMethod(), responseObserver);
    }
<pre>
Performs batch asynchronous speech recognition: send a request with N
audio files and receive a long running operation that can be polled to see
when the transcriptions are finished.
</pre>
java-speech/grpc-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/SpeechGrpc.java