static void _signal_trampoline(PropertyMap &map, const std::string &k, LuaRef ref, lua_State *l) {
		ref.PushCopyToStack();
		lua_pushlstring(l, k.c_str(), k.size());
		map.PushLuaTable();
		lua_pushvalue(l, -2);
		lua_rawget(l, -2);
		lua_remove(l, -2);
		pi_lua_protected_call(l, 2, 0);
	}