@property
    def extent(self):
        i = len(super(GridCoordinates, self).shape)
        if i == 3:
            return self._extent_3d()
        elif i == 2:
            return self._extent_2d()
        elif i == 1:
            return self._extent_1d()
        else:
            return ()
Coordinate ranges, not including 'ghost/rind' planes.
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.lib/src/openmdao/lib/datatypes/domain/grid.py/GridCoordinates.extent