Wish B4XCollections documentation

I'm unable to find B4XCollections documentation so that I may learn to use it.
is the only link I've found from prior forum posts, but it seems like an empty webpage.
(Sorry for the dumb question)

B4XCollections library is explained here: https://www.b4x.com/android/forum/threads/b4x-b4xcollections-more-collections.101071/