import { Observable } from 'rxjs';
import { OverlayRef } from '@angular/cdk/overlay';
import { MdcDialogPortal } from './dialog-portal';
/**  Reference to a dialog dispatched from the MdcDialog service. */
export declare class MdcDialogRef<T, R = any> {
    private _overlayRef;
    _portalInstance: MdcDialogPortal;
    readonly id: string;
    /** The instance of the component in the dialog. */
    componentInstance: T;
    /** Subject for notifying the user that the dialog has finished opening. */
    private readonly _afterOpened;
    /** Subject for notifying the user that the dialog has started closing. */
    private readonly _beforeClosed;
    /** Subject for notifying the user that the dialog has finished closing. */
    private readonly _afterClosed;
    /** Result to be passed to afterClosed. */
    private _result;
    constructor(_overlayRef: OverlayRef, _portalInstance: MdcDialogPortal, id?: string);
    /**
     * Close the dialog.
     * @param dialogResult Optional result to return to the dialog opener.
     */
    close(dialogResult?: R): void;
    /** Marks the dialog as opened. */
    opened(): void;
    /** Gets an observable that is notified when the dialog is finished opening. */
    afterOpened(): Observable<void>;
    /** Gets an observable that is notified when the dialog has started closing. */
    beforeClosed(): Observable<R | undefined>;
    /** Gets an observable that is notified when the dialog is finished closing. */
    afterClosed(): Observable<R | undefined>;
}