function getNotices($offset, $limit, $sinceId = null, $maxId = null)
 {
     if ($this->impossibleStream()) {
         return new ArrayWrapper(array());
     } else {
         return parent::getNotices($offset, $limit, $sinceId, $maxId);
     }
 }
 function getNotices($offset, $limit, $since_id = null, $max_id = null)
 {
     if ($this->impossibleStream()) {
         throw new PrivateStreamException($this->streamProfile, $this->userProfile);
     } else {
         return parent::getNotices($offset, $limit, $since_id, $max_id);
     }
 }