import type { HeartbeatsManager } from "./types.js";
export declare class HeartbeatsAPI implements HeartbeatsManager {
    #private;
    private static _instance?;
    private constructor();
    static getInstance(): HeartbeatsAPI;
    setGlobalManager(manager: HeartbeatsManager): boolean;
    disable(): void;
    reset(): void;
    get lastHeartbeat(): Date | undefined;
    startHeartbeat(id: string): void;
    stopHeartbeat(): void;
    yield(): Promise<void>;
}