code: def _find_controller(self, *args):
          '''
          Returns the appropriate controller for routing a custom action.
          '''
          for name in args:
              obj = self._lookup_child(name)
              if obj and iscontroller(obj):
                  return obj
          return Nonf _find_controller(self, *args):
          '''
          Returns the appropriate controller for routing a custom action.
          '''
          for name in args:
              obj = self._lookup_child(name)
              if obj and iscontroller(obj):
                  return obj
          return None
docs: Returns the appropriate controller for routing a custom action.