import { TemplateRef, Type } from '@angular/core';
import { OverlayRef } from '@angular/cdk/overlay';
/**
 * PopoverCloseEvent
 */
export interface PopoverCloseEvent<T> {
    type: 'backdropClick' | 'close';
    data: T;
}
/**
 * @type PopoverContent
 */
export declare type PopoverContent = TemplateRef<any> | Type<any> | string;
/**
 * PopoverRef
 * A class used to close popover if backdrop is clicked or if the caller calls close method
 */
export declare class PopoverRef<T = any> {
    overlay: OverlayRef;
    content: PopoverContent;
    data: T;
    private afterClosed;
    afterClosed$: import("rxjs").Observable<PopoverCloseEvent<T>>;
    constructor(overlay: OverlayRef, content: PopoverContent, data: T);
    /**
     * @method close
     * close the popup manually
     */
    close(data?: T): void;
    /**
     * @method _close
     * close the popup
     */
    private _close;
}