template <class Object, class R, class O, class A, class B, class T1, class T2>
Callback callback2(const Object *object, R (O::*method)(A, B) const, T1 arg1, T2 arg2) {
	return Callback(new CallbackMethodActionArg2<const Object, R (O::*)(A, B) const, T1, T2>
}