import { ComponentRef, Injector } from '@angular/core';
import { Observable, Subject } from 'rxjs';
export interface OverlayReference {
    /** Stream of keydown events dispatched to this overlay. */
    readonly _keydownEvents: Subject<KeyboardEvent>;
    /** Function that will be called on scroll or resize event */
    onResizeScroll: (() => void) | null;
    get injector(): Injector | undefined;
    get containerElement(): HTMLDivElement;
    get backdropElement(): Element | null;
    get componentRef(): ComponentRef<any> | null;
    get isDestroyed(): boolean;
    updateBackdrop: (hasBackdrop: boolean) => void;
    /** Gets an observable of keydown events targeted to this overlay. */
    keydownEvents(): Observable<KeyboardEvent>;
    /** Detaches a view from dirty checking again of ApplicationRef. */
    detach: () => void;
    /** Remove element of DOM */
    remove: () => void;
    /** Detach & remove */
    destroy: () => void;
}