/**
  * Add an AddContacts Activity to add contacts in bulk
  * @param string $accessToken - Constant Contact OAuth2 access token
  * @param AddContacts $addContactsActivity - Add Contacts Activity
  * @return Activity
  */
 public function addCreateContactsActivity($accessToken, AddContacts $addContactsActivity)
 {
     return $this->activityService->createAddContactsActivity($accessToken, $addContactsActivity);
 }