export declare class Multimap<K, V> {
    static fromEntries<K, V>(entries: [K, V[]][]): Multimap<K, V>;
    private _map;
    constructor(entries?: [K, V[]][]);
    addAllFromMap(map: Map<K, V>): void;
    map<Q>(callback: (key: K, values: Set<V>) => Q): Q[];
    [Symbol.iterator](): MapIterator<[K, Set<V>]>;
    hasAny(key: K): boolean;
    has(key: K, value: V): boolean;
    set(key: K, value: V): void;
    get size(): number;
    setAll(key: K, values: Iterable<V>): void;
    delete(key: K, value: V): void;
    keys(): Iterable<K>;
    values(): Generator<V, void, unknown>;
    getAll(key: K): V[];
    deleteAll(key: K): void;
}