import { Observable } from '../Observable';
/**
 * buffers values from the source by opening the buffer via signals from an observable provided to `openings`, and closing
 * and sending the buffers when an observable returned by the `closingSelector` emits.
 * @param {Observable<O>} openings An observable of notifications to start new buffers
 * @param {Function} an function, that takes the value emitted by the `openings` observable and returns an Observable, which,
 *  when it emits, signals that the associated buffer should be emitted and cleared.
 * @returns {Observable<T[]>} an observable of arrays of buffered values.
 */
export declare function bufferToggle<T, O>(openings: Observable<O>, closingSelector: (openValue: O) => Observable<any>): Observable<T[]>;