web_generator/test/integration/idl/callbacks_input.idl

callback VoidCallback = void ();
callback StringCallback = void (DOMString result);
callback Comparator = long (DOMString a, DOMString b);
callback Transformer = any (any input);
callback AsyncOperationCallback = undefined (DOMString status);

[Exposed=Window]
interface AsyncOperations {
  undefined performOperation(AsyncOperationCallback whenFinished);
};

interface Processor {
  void run(VoidCallback onComplete);
  void compare(Comparator cmp);
  void stringManipulate(DOMString string, StringCallback callback);
  void transform(any data, Transformer transformer);
};