///无参数请求回调 typedef ParamVoidCallback = dynamic Function(); ///回调一个参数 typedef ParamSingleCallback<D> = dynamic Function(D data); ///回到俩个参数 typedef ParamTwiceCallback<O, T> = dynamic Function(O dataOne, T dataTwo); ///回调三个参数 typedef ParamThreeCallback<O, T, K> = dynamic Function( O dataOne, T dataTwo, K threeData);
Flutter 定义多参数函数类型
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