gl_rbtree_oset_check_invariants 30 maint/gnulib/tests/test-rbtree_oset.c extern void gl_rbtree_oset_check_invariants (gl_oset_t set); gl_rbtree_oset_check_invariants 67 maint/gnulib/tests/test-rbtree_oset.c gl_rbtree_oset_check_invariants (set2);