Tabbar multi lines xml loading

Hi support team,

how can I add a multi lines option to a tabbar created from a xml file ?

Here is an example of xml tabbar structure:

<?xml version="1.0"?> <tabbar> <row> <tab id="tab1">Tab 1</tab> <tab id="tab2" width="100">Tab 2</tab> specifing width of label <tab id="tab3" selected="true">Tab 3</tab> selected tab <tab id="tab4" href="">Tab 4</tab> <tab id="tab5">Tab 5</tab> </row> <row> <tab id="tab5">Tab 2-1</tab> </row> <row> <tab id="tab5">Tab 3-1</tab> </row> </tabbar>