code: def border_color(self, value):
          
  
          if value is not None:
              assert type(value) is QColor, "'{0}' attribute: '{1}' type is not 'QColor'!".format("border_color", value)
          self.__border_color = value
          self.__set_style_sheet()
docs: Setter for **self.__border_color** attribute.
  
          :param value: Attribute value.
          :type value: QColor