import { BaseBackendConnectionService } from '../provider/base-backend-connection.service';
export declare class HealthService {
    private static HEARTBEAT_INTERVAL_MS;
    protected heartbeatTimer: any;
    protected backendConnection: BaseBackendConnectionService;
    constructor(backendConnection: BaseBackendConnectionService);
    startHeartBeat(): void;
    stopHeartBeat(): void;
    private _call;
}