the given stash. The return value is a read-only AV*.
C<level> should be 0 (it is used internally in this
function's recursion).
the given stash. The return value is a read-only AV*.
C<level> should be 0 (it is used internally in this
function's recursion).
=for apidoc mro_isa_changed_in
Takes the necessary steps (cache invalidations, mostly)
=for apidoc mro_isa_changed_in
Takes the necessary steps (cache invalidations, mostly)