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Greg Spencer authoredAdds Navigator.maybeOf to replace calling Navigator.of(context, nullOk: true), and removes the nullOk parameter. Also changes Navigator.of to return a non-nullable value, and removes many (120!) instances of the ! operator, reducing the possible places where a null dereference could occur. 
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| model | ||
| supplemental | ||
| app.dart | ||
| backdrop.dart | ||
| category_menu_page.dart | ||
| colors.dart | ||
| expanding_bottom_sheet.dart | ||
| home.dart | ||
| login.dart | ||
| shopping_cart.dart |