import { OnDestroy } from '@angular/core';
/** Container inside which all toasts will render. */
export declare class OverlayContainer implements OnDestroy {
    protected _document: any;
    protected _containerElement: HTMLElement;
    constructor(_document: any);
    ngOnDestroy(): void;
    /**
     * This method returns the overlay container element. It will lazily
     * create the element the first time  it is called to facilitate using
     * the container in non-browser environments.
     * @returns the container element
     */
    getContainerElement(): HTMLElement;
    /**
     * Create the overlay container element, which is simply a div
     * with the 'cdk-overlay-container' class on the document body.
     */
    protected _createContainer(): void;
}