import { Portal } from '@angular/cdk/portal';
import * as i0 from "@angular/core";
export declare class FooterService {
    private readonly components;
    /**
     * Represents an array of `Portal` objects with unknown type.
     */
    readonly portals: import("@angular/core").WritableSignal<Portal<unknown>[]>;
    /**
     * Computes the count of portals.
     *
     * @returns {number} The count of portals.
     */
    readonly portalCount: import("@angular/core").Signal<number>;
    /**
     * Adds a portal to the list of portals.
     *
     * @param {Portal<unknown>} portal - The portal to be added.
     *
     * @return {void}
     */
    pushPortal(portal: Portal<unknown>): void;
    /**
     * Removes a portal from the list of portals.
     *
     * @param {Portal<unknown>} portal - The portal to be removed.
     * @return {void}
     */
    removePortal(portal: Portal<unknown>): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<FooterService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FooterService>;
}