/*
=for apidoc Am|void|EXTEND|SP|int nitems
Used to extend the argument stack for an XSUB's return values. Once
-used, guarrantees that there is room for at least C<nitems> to be pushed
+used, guarantees that there is room for at least C<nitems> to be pushed
onto the stack.
=for apidoc Am|void|PUSHs|SV* sv