import { MonoTypeChangeSetOperatorFunction } from '../ChangeSetOperatorFunction';
/**
 * Cache equivalent to Publish().RefCount().  The source is cached so long as there is at least 1 subscriber.
 * @typeparam TObject The type of the object.
 * @typeparam TKey The type of the destination key.
 */
export declare function refCount<TObject, TKey>(): MonoTypeChangeSetOperatorFunction<TObject, TKey>;