/**
 * Cancelable debouncing of calls to trigger

 * @example <caption>waitTime</caption>
 * ```ts
 * const debounced = new Debouncer(a => console.log(a), 1, 100)
 * debounce.trigger('first')
 * debounce.trigger('second')
 * // after 1ms
 * // => 'second'
 * ```
 * @example <caption>maxWaitTime</caption>
 * ```ts
 * const debounced = new Debouncer(a => console.log(a), 3, 4)
 * debounce.trigger('first')
 * // after 1ms
 * debounce.trigger('second')
 * // after 1ms
 * // => 'second'
 * debounce.trigger('third')
 * // after 2ms, 4ms elapsed since the first trigger
 * // => 'third'
 * ```
 */
export declare class Debouncer<T extends (...args: any[]) => any> {
    private cb;
    private waitTime;
    private maxWaitTime;
    private timeout;
    private maxTimeout;
    private args;
    private defer;
    /**
     *
     * @param cb - trigger callback
     * @param waitTime - time to wait before invoking cb
     * @param maxWaitTime - maximum wait time from first triggering
     */
    constructor(cb: T, waitTime: number, maxWaitTime: number);
    private execute;
    /**
     *
     * @param args - arguments to pass to cb
     * @returns Promised resolved with cb return value
     */
    trigger(...args: Parameters<T>): Promise<ReturnType<T>>;
    /**
     * Cancels pending invocation of cb
     * @example
     * ```ts
     * const debounced = new Debouncer(a => console.log(a), 3, 4)
     * debounce.trigger('first')
     * debounce.cancel()
     * // console.log will not be invoked
     * ```
     */
    cancel(): void;
    setCb(cb: T): void;
}
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