appendCustomItem

Appends a custom item to the list of applications that is shown in the popup.

The item name must be unique per-widget. Clients can use the provided name as a detail for the signal@Gtk.AppChooserButton::custom-item-activated signal, to add a callback for the activation of a particular custom item in the list.

See also method@Gtk.AppChooserButton.append_separator.

Parameters