code: def stroke_linejoin(self, linejoin):
          
          linejoin = getattr(pgmagick.LineJoin, "%sJoin" % linejoin.title())
          linejoin = pgmagick.DrawableStrokeLineJoin(linejoin)
          self.drawer.append(linejoin)
docs: set to stroke linejoin.
  
          :param linejoin: 'undefined', 'miter', 'round', 'bevel'
          :type linejoin: str