import { Observable } from '../Observable';
/**
 * buffers the incoming observable values until the passed `closingNotifier` emits a value, at which point
 * it emits the buffer on the returned observable and starts a new buffer internally, awaiting the
 * next time `closingNotifier` emits
 *
 * @param {Observable<any>} closingNotifier an observable, that signals the buffer to be emitted} from the returned observable
 * @returns {Observable<T[]>} an observable of buffers, which are arrays of values
 */
export declare function buffer<T>(closingNotifier: Observable<any>): Observable<T[]>;