import { HubPortalOptions } from './portal-config';
import { HubPortalRef } from './portal-ref';
import * as i0 from "@angular/core";
/**
 * A service for opening portal windows.
 *
 * Creating a portal is straightforward: create a component or a template and pass it as an argument to
 * the `.open()` method.
 */
export declare class HubPortal {
    private _injector;
    private _portalStack;
    private _config;
    /**
     * Opens a new portal window with the specified content and supplied options.
     *
     * Content can be provided as a `TemplateRef` or a component type. If you pass a component type as content,
     * then instances of those components can be injected with an instance of the `HubActivePortal` class. You can then
     * use `HubActivePortal` methods to close / dismiss portals from "inside" of your component.
     *
     * Also see the [`HubPortalOptions`](#/components/portal/api#HubPortalOptions) for the list of supported options.
     */
    open(content: any, options?: HubPortalOptions): HubPortalRef;
    /**
     * The function `toggle` opens a portal with specified content and options while dismissing any existing portals.
     *
     * @param {any} content - The `content` parameter in the `toggle` function is the content that you want to display within the
     * portal. This can be any type of content such as a component, template, or any other HTML element that you want to show in the
     * portal.
     * @param {HubPortalOptions} options - The `options` parameter in the `toggle` function is an object that allows you to customize
     * the behavior of the portal.
     *
     * @returns The `toggle` function is returning a `HubPortalRef` object.
     */
    toggle(content: any, options?: HubPortalOptions): HubPortalRef;
    /**
     * Returns an observable that holds the active portal instances.
     */
    get activeInstances(): import("@angular/core").EventEmitter<HubPortalRef[]>;
    /**
     * Dismisses all currently displayed portal windows with the supplied reason.
     *
     * @since 3.1.0
     */
    dismissAll(reason?: any): void;
    /**
     * Indicates if there are currently any open portal windows in the application.
     *
     * @since 3.3.0
     */
    hasOpenPortals(): boolean;
    static ɵfac: i0.ɵɵFactoryDeclaration<HubPortal, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<HubPortal>;
}