import { ModalInstance } from "./ModalInstance";
import { IModalOptions } from "./IModalOptions";
import { ModalRenderer } from "./ModalRenderer";
import { TemplateRef } from "@angular/core";
export declare class ModalStack {
    private stack;
    private backdrop;
    private lastOpenedLayer;
    constructor();
    get openedModalCount(): number;
    get openedVisibleModalCount(): number;
    get openedBackdropModalCount(): number;
    closeLast(): Promise<boolean>;
    getLast(): ModalInstance<any>;
    open<TResult>(modalRenderer: ModalRenderer, modalData?: any, componentType?: Function, templateRef?: TemplateRef<any>, options?: IModalOptions): ModalInstance<TResult>;
    private closeModalsAfter;
    private invalidateBodyClass;
    private removeInstance;
}