import type { TimerCallback } from '../callback';
import type { TimerCallbackSync } from './sync';
export type TimerCallbackKind = 'once' | 'always';
export type TimerCallbackFn = TimerCallback | TimerCallbackSync;
/**
 * @category Timers
 */
export declare class TimerCallbackGroup {
    readonly id: string;
    private readonly _once;
    private readonly _always;
    constructor(id?: string | null);
    reset(): void;
    onceCt(): number;
    alwaysCt(): number;
    on(kind: TimerCallbackKind, fn: TimerCallbackFn): boolean;
    once(fn: TimerCallbackFn): boolean;
    always(fn: TimerCallbackFn): boolean;
    remove(kind: TimerCallbackKind, fn: TimerCallbackFn): boolean;
    invoke(fn: TimerCallbackFn, duration?: number | null): Promise<void>;
    executeAll(duration?: number | null): Promise<void>;
    executeOnce(duration?: number | null): Promise<void>;
    executeAlways(duration?: number | null): Promise<void>;
}