27 files declare their use of GridStackDefault in GridStack 8.2

Bootstrap3.php in src/Plugin/gridstack/engine/Bootstrap3.php

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

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

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

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

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

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

gridstack.install in ./gridstack.install

Installation actions for GridStack.

GridStack.php in src/Entity/GridStack.php

gridstack.theme.inc in templates/gridstack.theme.inc

Hooks and preprocess functions for the GridStack module.

GridStackEntityFormatterBase.php in src/Plugin/Field/FieldFormatter/GridStackEntityFormatterBase.php

GridStackFileFormatterBase.php in src/Plugin/Field/FieldFormatter/GridStackFileFormatterBase.php

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

GridStackLayout.php in src/Plugin/Layout/GridStackLayout.php

GridStackLayoutBase.php in src/Plugin/Layout/GridStackLayoutBase.php

GridStackManagerTest.php in tests/src/Kernel/GridStackManagerTest.php

GridStackMediaFormatter.php in src/Plugin/Field/FieldFormatter/GridStackMediaFormatter.php

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

GridStackViews.php in src/Plugin/views/style/GridStackViews.php

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

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

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

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

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