/**
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
 */
import { OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';
import { VtsMentionTriggerDirective } from './mention-trigger';
import * as i0 from "@angular/core";
export declare class VtsMentionService implements OnDestroy {
    private trigger?;
    private triggerChange$;
    triggerChanged(): Observable<VtsMentionTriggerDirective>;
    registerTrigger(trigger: VtsMentionTriggerDirective): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<VtsMentionService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<VtsMentionService>;
}