FutureOrValue3Callback<A, B, C> typedef
FutureOrValue3Callback<A, B, C> =
FutureOr<void> Function(A value1, B value2, C value3)
Implementation
typedef FutureOrValue3Callback<A, B, C> = FutureOr<void> Function(
A value1,
B value2,
C value3,
);