import { OverlayRef } from '@angular/cdk/overlay';
import { DialogComponent } from './dialog.component';
import { ElementRef, ViewRef } from '@angular/core';
import { Observable } from 'rxjs/internal/Observable';
export declare class DialogRef<T = any> {
    private overlayRef;
    private instance;
    private closeEventEmitter;
    private beforeCloseObservables;
    constructor(overlayRef: OverlayRef);
    close(data?: any): void;
    addBeforeClose(checkObservable: Observable<boolean>): void;
    beforeClose(): Observable<any>;
    afterClosed(): Observable<any>;
    setInstance(instance: DialogComponent): void;
    getOverlayRef(): OverlayRef;
    setOverlayRef(overlayRef: OverlayRef): void;
    getDialogContainerElement(): ElementRef;
    attachView(viewRef: ViewRef): void;
}