ValueTwoCallbackFutureT<T, V1, V2> typedef
ValueTwoCallbackFutureT<T, V1, V2> =
Future<T> Function(V1 value1, V2 value2)
Future Callback Two T
Implementation
typedef ValueTwoCallbackFutureT<T, V1, V2> = Future<T> Function(
V1 value1, V2 value2);