net.bootstrap.core.* and other similar libraries

The source code of v.3.0 for CLI contains a lot of references to packages "net.bootstrap.core" and similar.
However, these is no statement from where these come (they are also not part of the source code), and the corresponding pom.xml is missing (see prior post).

Where can we get the packages "net.bootstrap.core" or from where can we download either the jar file or the source code?

Without these packages, the source code cannot be compiled.
And no, "https://getbootstrap.com/", does not seem to be the answer.
Please provide clear answer.

Many thanks in advance,

Jozef