staticmethod() is used because the imported methods do not use
self/klass as a first parameter. Arguably, we could also fix the
method and introduce a first parameter, even if it is unused.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33568 20353a03-c40f-0410-a6d1-a30d3c3de9de