code: def get_class(self, module, class_name):
          
          # let's get the class
          class_object = getattr(module, class_name, None)
          if not class_object or not issubclass(class_object, Controller):
              class_object = None
  
          return class_object
docs: try and get the class_name from the module and make sure it is a valid
          controller