code: def round(self):
          
          x, y = self.anchor
          self.anchor = (normalizers.normalizeRounding(x),
                         normalizers.normalizeRounding(y))
          x, y = self.bcpIn
          self.bcpIn = (normalizers.normalizeRounding(x),
                        normalizers.normalizeRounding(y))
          x, y = self.bcpOut
          self.bcpOut = (normalizers.normalizeRounding(x),
                         normalizers.normalizeRounding(y))
docs: Round coordinates.