code: def add_lnTo(self, x, y):
          
          lnTo = self._add_lnTo()
          pt = lnTo._add_pt()
          pt.x, pt.y = x, y
          return lnTo
docs: Return a newly created `a:lnTo` subtree with end point *(x, y)*.
  
          The new `a:lnTo` element is appended to this `a:path` element.