This commit adds a new method as well, but it is not in use yet.
It could be used to increase the performance of an installation, but
the design is not finished, so not used yet.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17139 20353a03-c40f-0410-a6d1-a30d3c3de9de