import { ComponentRef, EventEmitter } from '@angular/core';
import { ActionableContent, ActionableNotification, Notification, NotificationContent, NotificationService, Toast, ToastContent } from 'carbon-components-angular';
import * as i0 from "@angular/core";
export declare class GlobalNotificationService {
    private _notificationService;
    private readonly _notificationQueue;
    setNotificationService(service: NotificationService): void;
    getNotificationService(): NotificationService | null;
    showNotification(notificationObj: NotificationContent | ToastContent | ActionableContent, notificationComp?: typeof Notification): Notification | null;
    showToast(notificationObj: NotificationContent | ToastContent, notificationComp?: typeof Toast): Notification | null;
    showActionable(notificationObj: ActionableContent, notificationComp?: typeof ActionableNotification): Notification | null;
    close(notificationRef: any): void;
    getSmartTimeout(notificationObj: any): number | null;
    getNotificationRefs(): ComponentRef<any>[] | null;
    getOnCloseEmitter(): EventEmitter<any> | null;
    ngOnDestroy(): void;
    private handleNotificationRef;
    private removeNotificationInQueue;
    static ɵfac: i0.ɵɵFactoryDeclaration<GlobalNotificationService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<GlobalNotificationService>;
}
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