code: def add_variables(self):
          
          for k, v in self.bot._vars.items():
              if not hasattr(v, 'type'):
                  raise AttributeError(
                      '%s is not a Shoebot Variable - see https://shoebot.readthedocs.io/en/latest/commands.html#dynamic-variables' % k)
              self.add_variable(v)
docs: Add all widgets to specified vbox
          :param container:
          :return: