public static SpeechFutureStub newFutureStub(io.grpc.Channel channel) {
    io.grpc.stub.AbstractStub.StubFactory<SpeechFutureStub> factory =
        new io.grpc.stub.AbstractStub.StubFactory<SpeechFutureStub>() {
          @java.lang.Override
          public SpeechFutureStub newStub(
              io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
            return new SpeechFutureStub(channel, callOptions);
          }
        };
    return SpeechFutureStub.newStub(factory, channel);
  }
Creates a new ListenableFuture-style stub that supports unary calls on the service
java-speech/grpc-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/SpeechGrpc.java