import { Injector } from '@angular/core';
import { BehaviorSubject } from 'rxjs';
import { ComponentType } from '@angular/cdk/portal';
export declare class LayoutService {
    footerComponent$: BehaviorSubject<ComponentType<any> | null>;
    footerComponentInjector: Injector | null;
    setFooterComponent(component: ComponentType<any>, injector?: Injector | null): void;
    clearFooterComponent(): void;
}