我有这个代码funcgetMeGoodies(String:goodieName,callback:(goodie:T)->()){vargoodie:T=//getitfromthejugcallback(goodie)}在某个地方我想调用它self.getMeGoodies("chocolatechip",callback:{(goodie)->()inprintln("eatthe\(goodie)")})我在字符串“chocolatechip”处收到一条错误消息，说它无法转换(blahblah)。我相信它无法弄清楚T是什么，因为当我从函数返回goodie并在调用它时将其分配给变