import * as i0 from "@angular/core";
export declare class DatePickerOverlay {
    protected _document: any;
    protected overlayElement: HTMLElement;
    constructor(_document: any);
    getOverlayElement(): HTMLElement;
    protected createOverlay(): HTMLElement;
    static ɵfac: i0.ɵɵFactoryDeclaration<DatePickerOverlay, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DatePickerOverlay>;
}