import { AngularFireDatabase } from 'angularfire2/database';
import { Observable } from 'rxjs/Rx';
import { AuthService } from '../../user/auth.service';
export declare class FollowService {
    private db;
    private authSvc;
    constructor(db: AngularFireDatabase, authSvc: AuthService);
    getFollowCount(type: 'meeting' | 'group' | 'item', id: string): Observable<number>;
    follow(type: 'meeting' | 'group' | 'item', id: string): Observable<any>;
    unfollow(type: 'meeting' | 'group' | 'item', id: string): Observable<any>;
    isFollowing(type: 'meeting' | 'group' | 'item', id: string): Observable<boolean>;
    private doAddRemove(type, id, userId, value);
}