import { Injector } from '@angular/core';
import { Overlay } from '@angular/cdk/overlay';
import { Modal } from './modal';
import { ModalRef } from './modal-ref';
import { ModalStackService } from './modal-stack.service';
import * as i0 from "@angular/core";
export declare class ModalService {
    private overlay;
    private injector;
    private stack;
    constructor(overlay: Overlay, injector: Injector, stack: ModalStackService);
    open<R = any>(config: Modal): ModalRef<R>;
    /** Global helper to close everything */
    closeAll(): void;
    private createOverlay;
    static ɵfac: i0.ɵɵFactoryDeclaration<ModalService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ModalService>;
}