/**
  * Delete root node
  *
  * @param      PropelPDO $con	Connection to use.
  * @return     boolean		Deletion status
  */
 public static function deleteRoot($scopeId = null, PropelPDO $con = null)
 {
     if (!self::SCOPE_COL) {
         $scopeId = null;
     }
     $root = sfAssetFolderPeer::retrieveRoot($scopeId, $con);
     if (sfAssetFolderPeer::getNumberOfChildren($root) == 1) {
         return sfAssetFolderPeer::deleteNode($root, $con);
     } else {
         return false;
     }
 }