code: def wait_time(self, value):
          
  
          if value is not None:
              assert type(value) in (int, float), "'{0}' attribute: '{1}' type is not 'int' or 'float'!".format(
                  "wait_time", value)
              assert value >= 0, "'{0}' attribute: '{1}' need to be positive!".format("wait_time", value)
          self.__wait_time = value
docs: Setter for **self.__wait_time** attribute.
  
          :param value: Attribute value.
          :type value: int or float