import { ElementRef, Injector } from '@angular/core';
import { Overlay, OverlayRef } from '@angular/cdk/overlay';
export declare class CalendarOverlayService {
    private overlay;
    private injector;
    private hostElemRef;
    constructor(overlay: Overlay, injector: Injector);
    open(hostElemRef: ElementRef): OverlayRef;
    private _createOverlay;
    private _getOverlayConfig;
    private _createInjector;
}