Callback4<T1, T2, T3, T4> typedef
Callback4<T1, T2, T3, T4> =
void Function(T1 arg1, T2 arg2, T3 arg3, T4 arg4)
Callback function type with 4 positional arguments.
Implementation
typedef Callback4<T1, T2, T3, T4> = void Function(
T1 arg1, T2 arg2, T3 arg3, T4 arg4);