How to use the @casual-simulation/aux-vm.SimulationManager function in @casual-simulation/aux-vm

constructor() {
        this._progress = new BehaviorSubject(null);
        this._initOffline();
        this._simulationManager = new SimulationManager(id => {
            return new BotManager(this._user, id, this._config);
        });
        this._userSubject = new BehaviorSubject(null);
        this._db = new AppDatabase();
    }

constructor() {
        this._progress = new BehaviorSubject(null);
        this._initOffline();
        this._simulationManager = new SimulationManager(id => {
            return new FileManager(this._user, id, this._config);
        });
        this._userSubject = new BehaviorSubject(null);
        this._db = new AppDatabase();
    }