[Zope] dtml-tree: Passing parameters to branches-method

[Ulla Theiss]

Hallo list,

how can I pass a parameter (namely the REQUEST-Object) to the 
branches-method of
dtml-tree?

I tried the following:

<dtml-tree branches="getBranches(REQUEST)">
    branch:
   id: <dtml-var id> <dtml-var title_or_id>
</dtml-tree>

But it seems, the method "getBranches" isn't called at all. No tree is 
built up, but there
isnt an error-message, too.

Many thanks in advance,
Ulla.