// !! job: remember tokens which raise a ClassNotFounds and remove from list, for performance
 // optimization
 private void checkExtendTypeHelper(String _loadClass, String category, TypeDefinition type) {
   try {
     if (type.isKindOf(_loadClass)) {
       addCategory(category, _loadClass, type);
     }
   } catch (JselException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
   }
 }