Recommend package not yet in Debian

["B. Clausius" <barcc@gmx.de>]

Hello,

I am packaging Pybik 1.1 that uses python3-pyicu. python3-pyicu is in
Ubuntu, but not in Debian (bug #671361). What should i do?
1. Just "Recommends: python3-pyicu" and rely the package is coming sometime
2. "Recommends: python3-pyicu" and target experimental
3. This way:
http://raphaelhertzog.com/2010/09/27/different-dependencies-between-debian-and-ubuntu-but-common-source-package/
4. ???

Vcs-Svn: svn://anonscm.debian.org/python-apps/packages/pybik/trunk/
Vcs-Browser:
http://anonscm.debian.org/viewvc/python-apps/packages/pybik/trunk/

Thanks, B.C.