Main Gtk struct. vbox is a GtkVBox - the main part of the dialog box. action_area is a GtkHButtonBox packed below the dividing GtkHSeparator in the dialog. It is treated exactly the same as any other GtkHButtonBox.
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Main Gtk struct. vbox is a GtkVBox - the main part of the dialog box. action_area is a GtkHButtonBox packed below the dividing GtkHSeparator in the dialog. It is treated exactly the same as any other GtkHButtonBox.