zul.sel
Classes 
ItemIter
ItemWidget
Listbox
Listcell
Listfoot
Listfooter
Listhead
Listheader
Listitem
Option
Select
SelectWidget
Tree
Treecell
Treechildren
Treecol
Treecols
Treefoot
Treefooter
Treeitem
TreeItemIter
Treerow