export declare class MultiMap<K = any, V = any> {
    items: Map<K, V[]>;
    add(key: K, item: V): void;
    keyCount(): number;
    has(key: K): boolean;
    get(key: K): Array<V>;
    delete(key: K): boolean;
    clear(): void;
    updateAllItems(updateFn: (item: V) => V): void;
    mapItemsOnKey(indexKey: any, updateCallbackFn: (item: any) => any): void;
    filterItemsOnKey(key: K, filter: (item: V) => boolean): void;
    keys(): MapIterator<K>;
    entries(): Generator<(K | V)[], void, unknown>;
    values(): Generator<V, void, unknown>;
    valueCount(): number;
}
//# sourceMappingURL=MultiMap.d.ts.map