void CBTestFunc2(String foo, String bar){
    Cout() << foo << " " << bar << "\n;"
}

Callback1<String> cb1 = callback1(&CBTestFunc2, "parameter 2"));
cb1("parameter 1");

void CBTestFunc3(String one, String two, String three){
    Cout() << Format("%s %s %s", one, two, three);
}

Callback1<String> cb2 = callback2(&CBTestFunc3, "two", "three");
cb2("one");