Func2Callback<TValue1, TValue2, TReturn> typedef
Func2Callback<TValue1, TValue2, TReturn> =
TReturn Function(TValue1, TValue2)
A callback that receives values of type TValue1 and TValue2 and returns
a value of type TReturn.
Implementation
typedef Func2Callback<TValue1, TValue2, TReturn> = TReturn Function(
TValue1,
TValue2,
);