import { ComponentType, Overlay } from '@angular/cdk/overlay';
import { DialogRef } from './dialog-ref';
import { DialogConfig } from './dialog-config';
export declare class DialogService {
    private overlay;
    /** The opened dialogs (last in, first out) */
    private openDialogs;
    constructor(overlay: Overlay);
    /**
     * Opens a dialog containing the given component.
     *
     * @param   component   Type of the the component to load into the dialog.
     * @param   config      Dialog configuration options.
     * @returns reference   Reference of the newly-opened dialog.
     */
    open<T, D = any>(component: ComponentType<T>, config?: DialogConfig<D>): DialogRef;
    /**
     * Closes all opened dialogs.
     */
    closeAll(): void;
    /**
     * Creates the overlay into which the dialog will be loaded.
     */
    private createOverlay;
    /**
     * Attaches a DialogComponent to the overlay.
     */
    private attachContainer;
    /**
     * Attaches the user-provided component to the already-created container.
     */
    private attachContent;
    /**
     * Creates a custom injector to be used inside the dialog.
     *
     * This allows the component loaded inside to access the dialogs'
     * configuration and methods (e.g. to close itself) using DI.
     */
    private createInjector;
    /**
     * Add a newly-opened dialog.
     */
    private addOpenDialog;
    /**
     * Remove a open dialog.
     */
    private removeOpenDialog;
}