GtkNotebook::prepend_page_menu
    
     Adds child as the first page in the notebook with
     tab_label as the page's tab. Also adds
     menu_label as the page's popup menu label.
     menu_label will only be visible if the popup menu
     is enabled by calling popup_enable() .
    
    
     See also: append_page_menu() ,
     insert_page_menu()