export declare type IWindowsChange = {
    type: 'CREATED' | 'CLOSED';
    window: IWindowRef;
    total: number;
};
export declare type IWindowRef = {
    id: number;
};
export declare class Windows {
    private _refs;
    private readonly _dispose$;
    readonly dispose$: import("rxjs").Observable<{}>;
    isDisposed: boolean;
    private readonly _change$;
    readonly change$: import("rxjs").Observable<IWindowsChange>;
    constructor();
    dispose(): void;
    readonly refs: IWindowRef[];
    readonly ids: number[];
}