Action3<T1, T2, T3> typedef
Null safety
Implementation
typedef Action3<T1, T2, T3> = FutureOr<void> Function(
T1 arg1, T2 arg2, T3 arg3);
typedef Action3<T1, T2, T3> = FutureOr<void> Function(
T1 arg1, T2 arg2, T3 arg3);