@headless-tree/coreInterfacesTreeDataLoaderOn this pageTreeDataLoader <T>Index PropertiesgetChildrengetItemProperties getChildrengetChildren: (itemId: string) => string[] | Promise<string[]>Type declaration(itemId: string): string[] | Promise<string[]>ParametersitemId: stringReturns string[] | Promise<string[]>getItemgetItem: (itemId: string) => T | Promise<T>Type declaration(itemId: string): T | Promise<T>ParametersitemId: stringReturns T | Promise<T>