6 files declare their use of GridStackVariant in GridStack 8.2

Builder.php in src/Plugin/gridstack/stylizer/Builder.php

Form.php in src/Plugin/gridstack/stylizer/Form.php

GridStackVariantForm.php in modules/gridstack_ui/src/Form/GridStackVariantForm.php

GridStackVariantFormController.php in modules/gridstack_ui/src/Controller/GridStackVariantFormController.php

GridStackVariantSelectionForm.php in modules/gridstack_ui/src/Form/GridStackVariantSelectionForm.php

Variant.php in src/Plugin/gridstack/engine/Variant.php