@headless-tree/coreInterfacesSyncDataLoaderFeatureTreeInstanceOn this pageSyncDataLoaderFeatureTreeInstance <T>Index PropertiesretrieveChildrenIdsretrieveItemDataProperties retrieveChildrenIdsretrieveChildrenIds: (itemId: string) => string[]Type declaration(itemId: string): string[]ParametersitemId: stringReturns string[]retrieveItemDataretrieveItemData: (itemId: string) => TType declaration(itemId: string): TParametersitemId: stringReturns T