import 'dart:async'; import "package:photos/models/location/location.dart"; typedef BoolCallBack = bool Function(); typedef VoidCallbackParamStr = void Function(String); typedef VoidCallbackParamInt = void Function(int); typedef VoidCallbackParamDouble = Function(double); typedef VoidCallbackParamBool = void Function(bool); typedef VoidCallbackParamListDouble = void Function(List); typedef VoidCallbackParamLocation = void Function(Location); typedef FutureVoidCallback = Future Function(); typedef FutureOrVoidCallback = FutureOr Function(); typedef FutureVoidCallbackParamStr = Future Function(String);