import { SchedulerLike, MonoTypeOperatorFunction } from 'rxjs';
export declare enum CacheMode {
    Default = 0,
    TolerateExpired = 1,
    SilentRefresh = 2
}
/**
 * Caches the source Observable values for a time period with three different caching strategies.
 *
 * @param windowTime
 * @param mode
 * @param scheduler
 */
export declare function cache<T>(windowTime: number, mode?: CacheMode, scheduler?: SchedulerLike): MonoTypeOperatorFunction<T>;