Creates a new GtkBuilderCScope object to use with future GtkBuilder instances.
Calling this function is only necessary if you want to add custom callbacks via [method@Gtk.BuilderCScope.add_callback_symbol].
a new GtkBuilderCScope
ConstructionException GTK+ fails to create the object.
See Implementation
Creates a new GtkBuilderCScope object to use with future GtkBuilder instances.
Calling this function is only necessary if you want to add custom callbacks via [method@Gtk.BuilderCScope.add_callback_symbol].