Error: A value of type '#lib1::TickerFuture' can't be assigned to a variable of type 'dart.async::Future<dart.core::Null>'. #7
Description
Compiler message:
file:///Users/xxx/Desktop/FlutterDemo/flutter_dropdown_menu-master/lib/_src/dropdown_menu.dart:271:16: Error: A value of type '#lib1::TickerFuture' can't be assigned to a variable of type 'dart.async::Futuredart.core::Null'.
Try changing the type of the left hand side, or casting the right hand side to 'dart.async::Futuredart.core::Null'.
return onHide();
^
file:///Users/xxx/Desktop/FlutterDemo/flutter_dropdown_menu-master/lib/_src/dropdown_menu.dart:310:12: Error: A value of type '#lib1::TickerFuture' can't be assigned to a variable of type 'dart.async::Futuredart.core::Null'.
Try changing the type of the left hand side, or casting the right hand side to 'dart.async::Futuredart.core::Null'.
return _handleShow(index, true);