the gobject.Closure to which the marshaller belongs
a gobject.Value which can store the returned gboolean
2
a gobject.Value array holding instance and arg1
the invocation hint given as the last argument to Closure.invoke
additional data specified when registering the marshaller
A marshaller for a gobject.CClosure with a callback of type gboolean (*callback) (gpointer instance, gint arg1, gpointer user_data) where the gint parameter denotes a flags type.