code: public Observable<PersonalAssistantsResponse> listCortanaEndpointsAsync() {
          return listCortanaEndpointsWithServiceResponseAsync().map(new Func1<ServiceResponse<PersonalAssistantsResponse>, PersonalAssistantsResponse>() {
              @Override
              public PersonalAssistantsResponse call(ServiceResponse<PersonalAssistantsResponse> response) {
                  return response.body();
              }
          });
      }
docs: Gets the endpoint URLs for the prebuilt Cortana applications.
  
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PersonalAssistantsResponse object