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