import { Overlay } from '@angular/cdk/overlay';
export declare class McRAILoader2 {
    private _overlay;
    private _isAttached;
    private _overlayRef;
    private _hide;
    constructor(_overlay: Overlay);
    private _getConfig();
    private _getPortal();
    private _attach();
    private _detach();
    show(): void;
    hide(): void;
}