import { MatSnackBar } from '@angular/material/snack-bar';
export interface ToastNotificationOptions {
    severity?: 'success' | 'error' | 'warning' | 'info';
    closable?: boolean;
    duration?: number;
    icon?: string | boolean;
}
export interface ToastNotification {
    id: number;
    message: string;
    options: ToastNotificationOptions;
}
export declare class Toaster {
    private snackBar;
    private notifications;
    private notifications$;
    private notificationsCount;
    private lastNotificationId;
    private snackBarReference?;
    private closeTimeout?;
    constructor(snackBar: MatSnackBar);
    openNotification(message: string, options?: ToastNotificationOptions): number;
    closeNotification(id: number): void;
    closeAll(): void;
}