The <header> element can be contained in a <list-expect> element and, when present must contain a <text> element. The contents of the <text> element is then the text expected to be found in the lists header label. This element is valid only when the <list-expect> element containing it is for a list screen or a detail screen field with an edit type of List View. If the header pane does not match the contents of the <text> element a script error is thrown.