In the changelog it is said "For MDB 4.4 beta we use an experimental version of Bootstrap 4 beta, not published yet.", we guess this means that mdbootstrap is being build from another checkout of bootstrap v4-dev branch (not v4.0.0-alpha.6). Could we know which commit is it? This is reasonably important for us since we do our own bootstrap v4 builds (for customized colors and some extra stuff) and we would like them to maintain compatibility with this mdbootstap release.

---