import { Subject, Observable } from 'rxjs';
import { ExtensionShutdown } from './interfaces';
export declare class ShutdownUtils {
    events$: Subject<string>;
    constructor();
    /**
     * Shutdown all extensions
     *
     * @param  {ExtensionShutdown[]} items
     * @returns Observable
     */
    shutdown(items: ExtensionShutdown[]): Observable<boolean>;
}