void regress_test_skip_unannotated_callback RegressTestCallback callback regress_test_skip_unannotated_callback void regress_test_skip_unannotated_callback (RegressTestCallback callback);

Should not emit a warning: https://bugzilla.gnome.org/show_bug.cgi?id=685399

<code>callback</code>

No annotation here

 <code>Returns</code>