Undocumented predicates
The following predicates are exported, but not or incorrectly documented.
- empty_queue(Arg1)
- inject_queue(Arg1, Arg2, Arg3)
- pop_queue(Arg1, Arg2, Arg3)
- push_queue(Arg1, Arg2, Arg3)
- poplist_queue(Arg1, Arg2, Arg3)
- pushlist_queue(Arg1, Arg2, Arg3)
- injectlist_queue(Arg1, Arg2, Arg3)