Warning
gtk_assistant_set_page_header_image has been deprecated since version 3.2 and should not be used in newly-written code. Since GTK+ 3.2, a header is no longer shown;
add your header decoration to the page content instead.
Sets a header image for page.
Since 2.10
Warning gtk_assistant_set_page_header_image has been deprecated since version 3.2 and should not be used in newly-written code. Since GTK+ 3.2, a header is no longer shown; add your header decoration to the page content instead. Sets a header image for page. Since 2.10