redef fun do_turn(turn: GameTurn[G])
	do
		current_bucket_key = key_for_tick(turn.tick)
		var current_bucket = buckets[current_bucket_key]

		var next_bucket = new HashSet[Bucketable[G]]
		buckets[current_bucket_key] = next_bucket
		self.next_bucket = next_bucket

		for e in current_bucket do
			var act_at = e.act_at
			if act_at != null then
				if turn.tick == act_at then
					e.do_turn(turn)
				else if act_at > turn.tick and
					key_for_tick(act_at) == current_bucket_key
				then
					next_bucket.add(e)
				end
			end
		end
	end