#GtkAppChooserDialog shows a #GtkAppChooserWidget inside a #GtkDialog.
Note that #GtkAppChooserDialog does not have any interesting methods
of its own. Instead, you should get the embedded #GtkAppChooserWidget
using gtk.app_chooser_dialog.AppChooserDialog.getWidget and call its methods if
the generic #GtkAppChooser interface is not sufficient for your needs.
#GtkAppChooserDialog shows a #GtkAppChooserWidget inside a #GtkDialog.
Note that #GtkAppChooserDialog does not have any interesting methods of its own. Instead, you should get the embedded #GtkAppChooserWidget using gtk.app_chooser_dialog.AppChooserDialog.getWidget and call its methods if the generic #GtkAppChooser interface is not sufficient for your needs.
To set the heading that is shown above the #GtkAppChooserWidget, use gtk.app_chooser_dialog.AppChooserDialog.setHeading.