code: def _round(self):
          
          for contour in self.contours:
              contour.round()
          for component in self.components:
              component.round()
          for anchor in self.anchors:
              anchor.round()
          for guideline in self.guidelines:
              guideline.round()
          self.width = normalizers.normalizeRounding(self.width)
          self.height = normalizers.normalizeRounding(self.height)
docs: Subclasses may override this method.