import { Listener } from "./Listener";
import { Time } from "./Time";
export declare class Counter<T = string> extends Listener {
    on({ callback, key, }: ({
        callback: (data: {
            key: string[];
            time: Time;
            count: number;
        }) => void;
        key?: string | null;
    })): {
        stopListen: () => void;
    };
    count(key: string[], count?: number): void;
}