flex_from_versa_grid_3(af::versa<ElementType, af::grid<3> >& map)
flex_from_versa_grid_3(af::versa<ElementType, af::grid<3> > map)
  flex_from_versa_grid_3(af::versa<ElementType, af::grid<3> >& map)  {    return af::versa<ElementType, af::flex_grid<> >(      map, af::make_flex_grid(map.accessor()));  }