Undocumented predicates
The following predicates are exported, but not or incorrectly documented.
- wn_path(Arg1, Arg2, Arg3)
- wn_path_nondet(Arg1, Arg2, Arg3)
- wn_wup(Arg1, Arg2, Arg3)
- wn_wup_nondet(Arg1, Arg2, Arg3)
- wn_lch(Arg1, Arg2, Arg3)
- wn_lch_nondet(Arg1, Arg2, Arg3)