/**
  * Remove a friendship object
  * @param DataObject $relationship 
  */
 public function removeFriendship(DataObject $relationship)
 {
     if ($relationship && $relationship->canDelete()) {
         // need to remove this user from the 'other's followers group and friends group
         // if needbe
         if ($relationship->Status == 'Approved') {
             $reciprocal = $relationship->reciprocal();
             if ($reciprocal) {
                 // set it back to pending
                 $reciprocal->Status = 'Pending';
                 $reciprocal->write();
             }
             $friends = $relationship->Other()->getGroupFor(MicroBlogMember::FRIENDS);
             $relationship->Initiator()->Groups()->remove($friends);
             $friends = $relationship->Initiator()->getGroupFor(MicroBlogMember::FRIENDS);
             $relationship->Other()->Groups()->remove($friends);
         }
         $followers = $relationship->Other()->getGroupFor(MicroBlogMember::FOLLOWERS);
         $relationship->Initiator()->Groups()->remove($followers);
         $relationship->delete();
         return $relationship;
     }
 }