Cant create MockClass of a class that extends another

[RickZzDev]

Hello, i'm trying to create a mock class that implements an abastract class, and this abstract class extends one state, that's the code.

Abstract class
abstract class WidgetTesteViewModel extends State {}

Mock
class WidgetTestSpy extends Mock implements WidgetTesteViewModel{}

Error:
'Mock.toString' ('String Function()') isn't a valid override of 'Diagnosticable.toString' ('String Function({DiagnosticLevel minLevel})')

[srawlins]

Thanks for opening an issue. This has been discussed at #233. See the solution.

[srawlins]

Duplicate of #233