“message area” in the message_dialog.
MessageDialog.getMessageArea
gtk.widget.Widget getMessageArea()Returns the message area of the dialog. This is the box where the dialog’s primary and secondary labels are packed. You can add your own extra content to that box and it will appear below those labels. See [gtk.dialog.Dialog.getContentArea] for the corresponding function in the parent #GtkDialog.
Returns
A #GtkBox corresponding to the