fabric8-planner planner https://github.com/fabric8-ui/fabric8-planner/blob/master/src/app/services/iteration.service.ts#L224

iteration.ts

getIteration(iteration: any): Observable<IterationModel> {
    if (Object.keys(iteration).length) {
      let iterationLink = iteration.data.links.self;
      return this.http.get(iterationLink)
        .map(iterationresp => iterationresp.json().data)
        .catch((error: Error | any) => {
          this.notifyError('Error getting iteration data.', error);
          return Observable.throw(new Error(error.message));
        });
    } else {
      return Observable.of(undefined);
    }
  }