for(Iterator<ForwardJump> i = forwardJumps.iterator(); i.hasNext(); ) { ForwardJump j = i.next();
for(Iterator<Jump> i = forwardJumps.iterator(); i.hasNext(); ) { Jump j = i.next();
	void purgeForwardJumps(int before) {		if (true) return;		for(Iterator<ForwardJump> i = forwardJumps.iterator(); i.hasNext(); ) {			ForwardJump j = i.next();			if (j.to < before) i.remove();		}	}