import { Enumerable } from "./Enumerable";
import { GroupByEnumerable } from "./GroupByEnumerable";
import { IEnumerableCache } from "./IEnumerableCache";
export declare class GroupedEnumerable<K, T> extends Enumerable<T> {
    protected readonly parent: GroupByEnumerable<K, T>;
    readonly key: K;
    protected cache: IEnumerableCache;
    enableCache: boolean;
    readonly keySelector: (item: T) => K;
    constructor(parent: GroupByEnumerable<K, T>, key: K, cache: IEnumerableCache);
    private _cacheResult;
    addResult(value: T): void;
    protected generator(): IterableIterator<T>;
}