public void PostAsync_throws_if_client_is_null(string path, Request request, Response _)
 {
     Assert.That(() => HttpRestClientExtensions.PostAsync <Request, Response>(null, path, request), Throws.ArgumentNullException);
 }
 public void PostAsync_throws_if_client_is_null(string path)
 {
     Assert.That(() => HttpRestClientExtensions.PostAsync(null, path), Throws.ArgumentNullException);
 }