code: def notify_update(self, x, y, width, height):
          
          if not isinstance(x, baseinteger):
              raise TypeError("x can only be an instance of type baseinteger")
          if not isinstance(y, baseinteger):
              raise TypeError("y can only be an instance of type baseinteger")
          if not isinstance(width, baseinteger):
              raise TypeError("width can only be an instance of type baseinteger")
          if not isinstance(height, baseinteger):
              raise TypeError("height can only be an instance of type baseinteger")
          self._call("notifyUpdate",
                       in_p=[x, y, width, height])
docs: Informs about an update.
          Gets called by the display object where this buffer is
          registered.
  
          in x of type int
  
          in y of type int
  
          in width of type int
  
          in height of type int