Java Question How to hide a class in B4J Library

I have written a B4J library compiled using the B4J IDE suite.
It contains two classes.
Class ONE is used by class TWO, but I only want class TWO to be revealed in the library.
This means I only want others using my library to see class TWO.

I can't use @HIDE java directive as my library is written entirely in B4J.

I see the same question was asked here in 2014 by "wl"
Directive to "hide" classes / files in a library
but there was no answer to his post.

I suppose I could manually edit the library XML file, although it would be nice if
a new class directive like: #HideFromLibrary: TRUE
could be considered for the future.

Or, does something like this already exist?

You are not posting in the correct place.

You will need delete it from the XML. Note that if it is a code module then you shouldn't delete it as Process_Globals will not be called.
Going forward I recommend you to use the simpler b4xlib package. This will allow you to build cross platform libraries.