import { OverlayRef } from '@angular/cdk/overlay';
import { Observable } from 'rxjs';
export declare class DialogRef<TResult = unknown> {
    private readonly overlayRef;
    private readonly closed$;
    private isClosed;
    private componentInstance?;
    constructor(overlayRef: OverlayRef);
    close(result?: TResult): void;
    afterClosed(): Observable<TResult | undefined>;
    setComponentInstance(instance: unknown): void;
    getComponentInstance<TComponent>(): TComponent | undefined;
    private finishClose;
}