docs: def language(self, value):
          """
          Setter for **self.__language** attribute.
  
          :param value: Attribute value.
          :type value: unicode
          """
  
          if value is not None:
              assert type(value) is unicode, "'{0}' attribute: '{1}' type is not 'unicode'!".format(
                  "language", value)
          self.__language = value