public void onClick(AjaxRequestTarget target)
{
treeTable.modelChanging();
DefaultTreeModel model = (DefaultTreeModel)treeTable.getDefaultModelObject();
model.removeNodeFromParent(c3);
model.insertNodeInto(c3, c2, model.getChildCount(c2));
treeTable.modelChanged();
treeTable.nodeSelected(c2);
treeTable.updateTree(target);
}
});