/**
 * A mapping where the value is a set. Adds some useful helper methods for adding/removing items from the value sets
 */
export declare class MapOfSets<T1, T2> extends Map<T1, Set<T2>> {
    /**
     * Adds an item to the set value with the supplied key.
     * @param key
     * @param item
     */
    addToSet(key: T1, item: T2): this;
    /**
     * Deletes an item from the set value with the supplied key. If after deleting the set contains no values the
     * key entry is also deleted. Throws an error if the key does not exist.
     * @param key
     * @param item
     */
    deleteFromSet(key: T1, item: T2): boolean;
}
//# sourceMappingURL=mapSet.d.ts.map