public MethodServerStreamingStream MethodServerStreaming(SignatureRequest request) => throw new NotImplementedException();
public Task <Response> MethodMapSignatureAsync(SignatureRequest request) => throw new NotImplementedException();
public Task <Operation <LroResponse, LroMetadata> > MethodLroSignaturesAsync(SignatureRequest request) => throw new NotImplementedException();
public Response MethodMapSignature(SignatureRequest request) => throw new NotImplementedException();