onFill method
Implementation
Future<void>? onFill(DismissDirection direction, double dx, double? fill, {Duration? duration}) async => _state != null ? await _state!._onFill(direction, dx, fill, duration: duration) : null;
Future<void>? onFill(DismissDirection direction, double dx, double? fill, {Duration? duration}) async => _state != null ? await _state!._onFill(direction, dx, fill, duration: duration) : null;