import { Observable } from 'rxjs/Observable';
import { EventSource } from './eventSource';
import 'rxjs/add/observable/interval';
import 'rxjs/add/operator/filter';
import 'rxjs/add/operator/switchMap';
export declare class EventRSVP {
    private ds;
    constructor(eventSource: EventSource);
    observeCta(): Observable<any>;
}