export declare const enum ScheduleTimer {
    MICRO = 0,
    ASYNC = 1,
    ANIMATION_FRAME = 2,
}
export declare type Action = () => any;
export default class Scheduler {
    queue: Action[];
    private delay;
    private active;
    private id;
    private timer;
    schedule(action: Action, timer?: ScheduleTimer, delay?: number): void;
    flush(): void;
    requestAsyncId(id: any, timer: ScheduleTimer, delay: number): number | undefined;
    recycleAsyncId(id: any, timer: ScheduleTimer, delay: number): any;
    stop(id: any, timer: ScheduleTimer): void;
    abort(): void;
}