MultiDelegateFutureOr2<T, S, U> typedef
MultiDelegateFutureOr2<T, S, U> = MultiDelegate2<FutureOr<T> , S, U>
a typedef for an async MultiDelegate2
Implementation
typedef MultiDelegateFutureOr2<T, S, U> = MultiDelegate2<FutureOr<T>, S, U>;