import type { GridItem } from './grid.util';
export interface KeysOptions {
    keyExtractor?: <ItemT extends GridItem<{
        id?: string;
        key?: string;
    } | null>>(items: ItemT[], index: number) => string;
}
/**
 *
 * @param iterator
 * @param options
 */
export declare function gridKeys<T>(iterator: Iterable<GridItem<T>>, options?: KeysOptions): Generator<GridItem<T>, void, unknown>;