Error in widget.dart

[sumansahoo1]

Describe the bug
The class hasn't been imported, due to which it's showing error.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'lib/data/widget_category.dart'
2. See error in line 32

Expected behavior
There shouldn't be any error.

Screenshots

[karan2527]

can i solve this issues ....!
is maintainers are still active ?