Undocumented predicates

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

 extend(Arg1, Arg2, Arg3)

 contract(Arg1, Arg2)

 enable_aspect(Arg1)

 disable_aspect(Arg1)

 enable_extension(Arg1, Arg2, Arg3)

 disable_extension(Arg1, Arg2, Arg3)

 current_enabled_aspect(Arg1)

 current_enabled_aspect(Arg1, Arg2)

 current_disabled_aspect(Arg1)

 current_aspect(Arg1)

 current_object(Arg1)

 current_method(Arg1)

 ::(Arg1, Arg2)

 ::(Arg1, Arg2, Arg3)

 ::(Arg1, Arg2, Arg3, Arg4)

 to(Arg1, Arg2)

 to(Arg1, Arg2, Arg3)

 start_aspect_event_dispatcher(Arg1)

 new_aspect(Arg1)

 in_aspect(Arg1)

 end_aspect

 new_object(Arg1)

 new_object(Arg1, Arg2)

 in_object(Arg1)

 end_object

 term_expansion(Arg1, Arg2)

 goal_expansion(Arg1, Arg2)

 ::(Arg1)

 method(Arg1)