static function fillAvatars(&$profiles, $width)
 {
     $ids = array();
     foreach ($profiles as $profile) {
         if (!empty($profile)) {
             $ids[] = $profile->id;
         }
     }
     $avatars = Avatar::pivotGet('profile_id', $ids, array('width' => $width, 'height' => $width));
     foreach ($profiles as $profile) {
         if (!empty($profile)) {
             // ???
             $profile->_fillAvatar($width, $avatars[$profile->id]);
         }
     }
 }