Gets the #GtkApplication associated with the builder.
The #GtkApplication is used for creating action proxies as requested from XML that the builder is loading.
By default, the builder uses the default application: the one from gio.application.Application.getDefault. If you want to use another application for constructing proxies, use gtk.builder.Builder.setApplication.
the application being used by the builder, or null
Gets the #GtkApplication associated with the builder.
The #GtkApplication is used for creating action proxies as requested from XML that the builder is loading.
By default, the builder uses the default application: the one from gio.application.Application.getDefault. If you want to use another application for constructing proxies, use gtk.builder.Builder.setApplication.