Revert "About Classes - Done"

This reverts commit a50727dba98e5984d40d087fdbb9d73697844334.
Revert "About Modules - Done"

This reverts commit 790ea41b8df3e82fd405adb5b0aae59432c5bd6f.
Revert "About Discriminated Unions - Done"

This reverts commit f27ce85da3dcfea2782985300f4e84d2872c4b0a.