@headless-tree/coreInterfacesTreeStateOn this pageTreeState <T>HierarchyTreeStateType<T>TreeStateIndex PropertiesassistiveDndStatecheckedItemsdndexpandedItemsfocusedItemloadingItemChildrensloadingItemDatarenamingItemrenamingValuesearchselectedItemsProperties optionalassistiveDndStateassistiveDndState?: null | AssistiveDndStatecheckedItemscheckedItems: string[]optionaldnddnd?: null | DndState<T>expandedItemsexpandedItems: string[]focusedItemfocusedItem: null | stringloadingItemChildrensloadingItemChildrens: string[]loadingItemDataloadingItemData: string[]optionalrenamingItemrenamingItem?: null | stringoptionalrenamingValuerenamingValue?: stringsearchsearch: null | stringselectedItemsselectedItems: string[]