import { Injector } from '@angular/core';
import { NotifierPosition, NotificationConfig } from './types';
import { Overlay, OverlayRef } from '@angular/cdk/overlay';
import { NotificationRef, NotificationRefHandler } from './notification-ref';
import { NotifierOptions } from './types';
export declare class NotificationsHandlerService implements NotificationRefHandler {
    private _overlay;
    private _injector;
    private _config;
    constructor(_overlay: Overlay, _injector: Injector, _config: NotificationConfig);
    private _notifications;
    create(opts: NotifierOptions): NotificationRef;
    close(notificationRef: NotificationRef): void;
    destroy(notificationRef: NotificationRef): void;
    isDestroyed(notificationRef: NotificationRef): boolean;
    isVisible(notificationRef: NotificationRef): boolean;
    getNotifications(pos?: NotifierPosition): NotificationRef[];
    getOverlayRef(notificationRef: NotificationRef): OverlayRef;
    private _createPortal;
    updatePosition(notificationRef: NotificationRef): void;
    private posStrategyTopRight;
    private posStrategyTopLeft;
    private posStrategyTop;
    private posStrategyBottomRight;
    private posStrategyBottomLeft;
    private posStrategyBottom;
}