observable - rxjs flatmap missing

Question

I try to chain multiple rx.js observables and pass the data. Flatmap should be the fitting operator but with an import of

import { Observable } from 'rxjs/Observable';

it is not found:

Error TS2339: Property 'flatmap' does not exist on type 'Observable<Coordinates>'

Version 5.0.0-beta.6 of rx.js is used.

public getCurrentLocationAddress():Observable<String> {
    return Observable.fromPromise(Geolocation.getCurrentPosition())
      .map(location => location.coords)
      .flatmap(coordinates => {
        console.log(coordinates);
        return this.http.request(this.geoCodingServer + "/json?latlng=" + coordinates.latitude + "," + coordinates.longitude)
          .map((res: Response) => {
                       let data = res.json();
                       return data.results[0].formatted_address;
              });
      });
  }

Answer 1

It turns out the answer is quite simple:

the operator is called mergeMap in this version of rxjs

EDIT:

Furthermore, you might have to use import 'rxjs/add/operator/mergeMap'.