import { MonoTypeOperatorFunction, ObservableInput } from '../types';
/**
 * Ignores source values for a duration determined by another Observable, then
 * emits the most recent value from the source Observable, then repeats this
 * process.
 *
 * <span class="informal">It's like {@link auditTime}, but the silencing
 * duration is determined by a second Observable.</span>
 *
 * ![](audit.svg)
 *
 * `audit` is similar to `throttle`, but emits the last value from the silenced
 * time window, instead of the first value. `audit` emits the most recent value
 * from the source Observable on the output Observable as soon as its internal
 * timer becomes disabled, and ignores source values while the timer is enabled.
 * Initially, the timer is disabled. As soon as the first source value arrives,
 * the timer is enabled by calling the `durationSelector` function with the
 * source value, which returns the "duration" Observable. When the duration
 * Observable emits a value, the timer is disabled, then the most
 * recent source value is emitted on the output Observable, and this process
 * repeats for the next source value.
 *
 * ## Example
 *
 * Emit clicks at a rate of at most one click per second
 *
 * ```ts
 * import { fromEvent, audit, interval } from 'rxjs';
 *
 * const clicks = fromEvent(document, 'click');
 * const result = clicks.pipe(audit(ev => interval(1000)));
 * result.subscribe(x => console.log(x));
 * ```
 *
 * @see {@link auditTime}
 * @see {@link debounce}
 * @see {@link delayWhen}
 * @see {@link sample}
 * @see {@link throttle}
 *
 * @param durationSelector A function
 * that receives a value from the source Observable, for computing the silencing
 * duration, returned as an Observable or a Promise.
 * @return A function that returns an Observable that performs rate-limiting of
 * emissions from the source Observable.
 */
export declare function audit<T>(durationSelector: (value: T) => ObservableInput<any>): MonoTypeOperatorFunction<T>;
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