zikula/core — comment on commit 326b222ef5f07239e061071ccde2f67587bc87d0
File:  line 0
By drak:

It's specifically during the installer and just for the core modules (which
are being converted). At this stage the plugins are not initialized so
this helper is not available (the problem is that in 1.3.x Doctrine 2 is a
plugin and not part of the core).