The problem is, that I use the datagrid-filterrow-extension and I don't know how to access the element (object?) that represent the comotree
I tryed this:
// this should give me the combotree?
var combotree = $('#dg').datagrid('getFilterComponent','ct-field');
// there is a tree() method listed under "__proto__" should it give back the tree-object?
var tree = combotree.tree();
// badly the tree is equal to combotree, and I stuck at this point