code: def lineWidth(self, lw=None):
          
          if lw is not None:
              if lw == 0:
                  self.GetProperty().EdgeVisibilityOff()
                  return
              self.GetProperty().EdgeVisibilityOn()
              self.GetProperty().SetLineWidth(lw)
          else:
              return self.GetProperty().GetLineWidth()
          return self
docs: Set/get width of mesh edges. Same as `lw()`.