import { OperatorFunction } from '../types';
/**
 * Ignores all items emitted by the source Observable and only passes calls of `complete` or `error`.
 *
 * ![](ignoreElements.png)
 *
 * ## Examples
 * ### Ignores emitted values, reacts to observable's completion.
 * ```javascript
 * of('you', 'talking', 'to', 'me').pipe(
 *   ignoreElements(),
 * )
 * .subscribe(
 *   word => console.log(word),
 *   err => console.log('error:', err),
 *   () => console.log('the end'),
 * );
 * // result:
 * // 'the end'
 * ```
 * @return {Observable} An empty Observable that only calls `complete`
 * or `error`, based on which one is called by the source Observable.
 * @method ignoreElements
 * @owner Observable
 */
export declare function ignoreElements(): OperatorFunction<any, never>;