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import { Notification } from '../Notification';
import { OperatorFunction } from '../types';
/**
* Converts an Observable of {@link Notification} objects into the emissions
* that they represent.
*
* <span class="informal">Unwraps {@link Notification} objects as actual `next`,
* `error` and `complete` emissions. The opposite of {@link materialize}.</span>
*
* 
*
* `dematerialize` is assumed to operate an Observable that only emits
* {@link Notification} objects as `next` emissions, and does not emit any
* `error`. Such Observable is the output of a `materialize` operation. Those
* notifications are then unwrapped using the metadata they contain, and emitted
* as `next`, `error`, and `complete` on the output Observable.
*
* Use this operator in conjunction with {@link materialize}.
*
* ## Example
* Convert an Observable of Notifications to an actual Observable
* ```javascript
* import { of, Notification } from 'rxjs';
* import { dematerialize } from 'rxjs/operators';
*
* const notifA = new Notification('N', 'A');
* const notifB = new Notification('N', 'B');
* const notifE = new Notification('E', undefined,
* new TypeError('x.toUpperCase is not a function')
* );
* const materialized = of(notifA, notifB, notifE);
* const upperCase = materialized.pipe(dematerialize());
* upperCase.subscribe(x => console.log(x), e => console.error(e));
*
* // Results in:
* // A
* // B
* // TypeError: x.toUpperCase is not a function
* ```
*
* @see {@link Notification}
* @see {@link materialize}
*
* @return {Observable} An Observable that emits items and notifications
* embedded in Notification objects emitted by the source Observable.
* @method dematerialize
* @owner Observable
*/
export declare function dematerialize<T>(): OperatorFunction<Notification<T>, T>;
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