appBar: buildAppBarWidget(),
gives error stating:
The argument type ‘Widget’ can’t be assigned to the parameter type ‘PreferredSizeWidget?’
Type your question above this line.
Course: https://www.educative.io/collection/5726865580883968/6563776842170368
Lesson: https://www.educative.io/collection/page/5726865580883968/6563776842170368/6073911025336320