editor: GridOptionEditor
GtkDialog(main_dialog.toplevel): title='Add Grid Attribute Option', hidden
  GtkVBox(main_dialog._main_vbox):
    GtkVBox(main_dialog.vbox, expand=True, fill=True):
      GtkEventBox(main_dialog.header):
      GtkEventBox(main_dialog.main, expand=True, fill=True, padding=6): slave GridOptionEditor is attached
        GtkTable(toplevel):
          GtkLabel(label1): 'Attribute option:'
          ProxyEntry(description): '', mandatory
          GtkLabel(label2): 'Option order:'
          ProxySpinButton(option_order_spin): ''
          ProxyCheckButton(active_check_box): 'Is active', active, insensitive
      GtkHBox(fill=True):
        GtkEventBox(main_dialog.extra_holder, expand=True, fill=True, padding=6):
        GtkEventBox(main_dialog.print_holder, expand=True, fill=True):
        GtkEventBox(main_dialog.notice, fill=True):
        GtkEventBox(main_dialog.details_holder, padding=6, pack-end):
    GtkHButtonBox(fill=True, pack-end):
      GtkButton(main_dialog.cancel_button, expand=True, fill=True, padding=6): 'gtk-cancel'
      GtkButton(main_dialog.ok_button, expand=True, fill=True, padding=6): 'gtk-ok', insensitive
