Dart: typedef with generics seems not to work

I would like to define a function through a typedef and then passing the right Type when calling it. Something like this:

typedef testFn<T>();

main() {
  testFn tester;
  tester = testerFn;
  tester<int>(); // Error: The method '() → dynamic' is declared with 0 type parameters, but 1 type arguments were given.
}

testerFn<T>() {//Do something}

I don't know if this a bug or not, but, anyway, how I could I solve something like that?