docs: def nearestPoint(self, pos):
          """
          Returns the nearest graphing point for this item based on the
          inputed graph position.
          
          :param      pos | <QPoint>
          
          :return     (<variant> x, <variant> y)
          """
          # lookup subpaths
          for x, y, path in self._subpaths:
              if path.contains(pos):
                  return (x, y)
          
          return (None, None)