code: def remove_permission(self, elements):
          
          elements = element_resolver(elements)
          for element in elements:
              if element in self.granted_element:
                  self.data['granted_element'].remove(element)
          self.update()
docs: Remove permission/s to this ACL. Change is committed at end of
          method call.
          
          :param list elements: list of element/s to remove
          :type elements: list(str,Element)
          :raises UpdateElementFailed: Failed modifying permissions
          :return: None