Comment 16 for bug 1508363

Victor and others, in order to get the header height you need to set the Page.header first. Page.header is null by default, so no wonder you cannot get the height. You can do something like

Page {
    header: PageHeader {
    }

}

Then you will have the header set and you can use that to get the height. The component is present in UITK trunk, however I do not see its documentation under d.u.c...