Acutally I do.
Coldspring BER I believe does not support complex variables anymore on
the settings structure that gets sent in to coldspring. If you are
using coldbox 2.5.0 rc2, you will find that coldboxfactory object that
can produce datasource beans already for you. However, if you just
want the variable, well, I suggest, just creating a simple setting. I
dislike that complex variables where eliminated from coldpsring and I
have modified my coldspring to support them.