/**
 * @license
 * Copyright Datorama. All Rights Reserved.
 *
 * Use of this source code is governed by an Apache License 2.0 license that can be
 * found in the LICENSE file at https://github.com/datorama/client-core/blob/master/LICENSE
 */
import { Observable } from 'rxjs';
/**
 * Add debounce optionally. If you don't pass a value, you will not trigger debounce
 * @param time - debounce time
 * @returns {(source: Observable<T>) => Observable<T>}
 */
export declare function optionalDebounce<T>(time?: any): (source: Observable<T>) => Observable<T>;