"Не объявленная" функция

struct Dmg
{

unit u,c;
float dmg = 75.;
timer t = CreateTimer();

void Finish() {
UnitDamageTarget(c,u,dmg,false,false,null,null,null);
DestroyEffect(AddSpecialEffectTarget("Abilities\\Spells\\Human\\Invisibility\\InvisibilityTarget.mdl",u,"origin"));
}
void Start (unit target, unit caster) {
u = target;
c = caster;
TimerStart(t,3000.,false,function Finish);
}

}