import { OnDestroy } from '@angular/core';
import { MessageService } from 'primeng/components/common/messageservice';
export declare class NotificationButton implements OnDestroy {
    unreadMessages: boolean;
    messageList: any[];
    private subscription;
    constructor(messageService: MessageService);
    ngOnDestroy(): void;
    onClick(event: any): void;
    private onMessage(messages);
}