Undocumented predicates

The following predicates are exported, but not or incorrectly documented.

 reset

 set_config(Arg1, Arg2)

 set_default_context(Arg1)

 get_config(Arg1, Arg2)

 load_context(Arg1, Arg2)

 save_context(Arg1, Arg2)

 delete_context(Arg1)

 default_context(Arg1)