May the placement pass move a marked outer-grid axis?
Source:R/nested_laplace_auto_grid.R
auto_grid_place.RdReads back what auto_grid()'s place argument recorded, so a wrapper that
rebuilds a value (as.numeric() drops every attribute) can re-apply both
halves of the declaration rather than only the provenance half.
Value
FALSE when x was marked auto_grid(place = FALSE), TRUE
otherwise – including for a value carrying no mark at all, which the
engine holds because it reads as a pin rather than because it asked to be
held.