API Reference > ui-abstract > UiItemsProvider > UiItemsApplication UiItemsApplication Interface Beta Application for items provided by a UiItemsProvider Methods Name Description validateBackstageItem(item: BackstageItem): { action: UiItemsApplicationAction, updatedItem: BackstageItem } Optional Validate and optionally update a Backstage item validateStatusBarItem(item: CommonStatusBarItem): { action: UiItemsApplicationAction, updatedItem: CommonStatusBarItem } Optional Validate and optionally update a StatusBar item validateToolbarButtonItem(item: CommonToolbarItem): { action: UiItemsApplicationAction, updatedItem: CommonToolbarItem } Optional Validate and optionally update a Toolbar button item validateWidget(widget: AbstractWidgetProps): { action: UiItemsApplicationAction, updatedWidget: AbstractWidgetProps } Optional Validate and optionally update a Widget Defined in ui/abstract/src/ui-abstract/UiItemsArbiter.ts Line 20 Last Updated: 29 November, 2022