Availability:C-language interface function
after)Destroy all term references that have been created after after,
including after itself. Any reference to the invalidated term
references after this call results in undefined behaviour.
Note that returning from the foreign context to Prolog will reclaim
all references used in the foreign context. This call is only necessary
if references are created inside a loop that never exits back to Prolog.
See also PL_open_foreign_frame(), PL_close_foreign_frame()