def _get_plane_axes(self, axis):
        """
        Get my plane axes indexes: these are already
        (as compared with higher level planes),
        as we are returning a DataFrame axes.
        """
        return [self._get_axis(axi)
                for axi in self._get_plane_axes_index(axis)]
def _get_plane_axes ( self , axis ) : return [ self . _get_axis ( axi ) for axi in self . _get_plane_axes_index ( axis ) ]
Get my plane axes indexes: these are already
        (as compared with higher level planes),
        as we are returning a DataFrame axes.