If set to `""` or NULL, the button won't be shown.
The button can be used with a [gio.action.Action], or with the signal@Banner::button-clicked signal.
string buttonLabel() @propertyGet buttonLabel property.
If set to `""` or NULL, the button won't be shown.
The button can be used with a [gio.action.Action], or with the signal@Banner::button-clicked signal.
void buttonLabel(string propval) @propertySet buttonLabel property.
propval | The label to show on the button. If set to `""` or NULL, the button won't be shown. The button can be used with a [gio.action.Action], or with the signal@Banner::button-clicked signal. |