code: def center(self):
          '''
          Point whose coordinates are (midX,midY,origin.z), Point.
          '''
          return Point(self.midX, self.midY, self.origin.zf center(self):
          '''
          Point whose coordinates are (midX,midY,origin.z), Point.
          '''
          return Point(self.midX, self.midY, self.origin.z)
docs: Point whose coordinates are (midX,midY,origin.z), Point.