OnFuture<F> constructor
OnFuture<F> ({})
Implementation
OnFuture({
required Widget Function()? onWaiting,
required Widget Function(dynamic err, void Function() refresh)? onError,
required Widget Function(F data, void Function() refresh) onData,
}) : _onWaiting = onWaiting,
_onError = onError,
_onData = onData;