

Example for FF_GroupTree with no group ids.
- FF_CounterValueTree

Example for FF_GroupTree with group ids.
- FF_CounterTypeTree

TODO:
- alte tree klassen umstellen auf neue tree klasse (siehe FF_CounterTypeTree)
- ff_bankaccounttree
- ff_accounttree
- ff_addresstree
- ff_commoditytree
- ff_currencytree
- ff_invoicetree
- ff_itemtree
- ff_jobtree
- ff_partnertree
- ff_printdoctree
- ff_report2settingstree
- ff_ruletree
- ff_taxtree
