import { Observable } from 'rxjs/Observable';
import { WebSocketMessageServiceBase } from './WebSocketMessageService';
import { IServerUrlsRepository } from './configuration/ServerUrlsRepository';
export declare abstract class UpdateServiceBase<T> extends WebSocketMessageServiceBase<T> {
    private readonly _serverUrlsRepository;
    constructor(groupName: string, serverUrlsRepository: IServerUrlsRepository);
    protected getServerUrl(): Observable<string>;
}