code: def variables(self, value):
          
  
          if value is not None:
              assert type(value) is dict, "'{0}' attribute: '{1}' type is not 'dict'!".format("variables", value)
              for key, element in value.iteritems():
                  assert type(key) is unicode, "'{0}' attribute: '{1}' type is not 'unicode'!".format(
                      "variables", key)
                  assert type(element) is unicode, "'{0}' attribute: '{1}' type is not 'unicode'!".format(
                      "variables", element)
          self.__variables = value
docs: Setter for **self.__variables** attribute.
  
          :param value: Attribute value.
          :type value: dict