Mixin Error for TransitionRouteAware

[berkayevren]

dashboard_screen.dart
Line 22

with SingleTickerProviderStateMixin, TransitionRouteAware {

The class 'TransitionRouteAware' can't be used as a mixin because it's neither a mixin class nor a mixin.dartclass_used_as_mixin
abstract class TransitionRouteAware
package:exampleApp/loginScreen/transition_route_observer.dart

An interface for objects that are aware of their current [TransitionRoute].

This is used with [TransitionRouteObserver] to make a widget aware of changes to the [Navigator]'s session history.

I'm getting this mixin error. Is this related to the new version of Dart? How can I solve it?