flatMap missing after upgrading to RC 6 and RxJS Beta 11

Question

After upgrading to RC6 and rxjs@5.0.0-beta.11 I seem to be missing a few extensions from Observable object.

flatMap operator is gone, mergeMap is also not here. I on

Answer 1

After upgrade to Angular 4, I've realized that now the correct way for importing flatMap is:

import {Observable} from 'rxjs/Rx'
import 'rxjs/add/operator/mergeMap';