/** Each key of a SetMap maps to a Set, never to undefined. */
export declare class SetMap<K, V> extends Map<K, Set<V>> {
	/** Will implicitly create the Set if it does not exist. */
	get(key: K): Set<V>;
	/** Adds new values to the existing set. */
	add(key: K, ...values: V[]): Set<V>;
	/** Removes values from a set. */
	remove(key: K, ...values: V[]): Set<V>;
	/** Replaces the existing set with new values. */
	set(key: K, values: V[] | Set<V>): this;
	/** Replaces the existing set with new values. */
	setV(key: K, ...values: V[]): this;
}
export default SetMap;