redef class Char super DirectSerializable end
redef class Int super DirectSerializable end
redef class Float super DirectSerializable end
-redef class NativeString super DirectSerializable end
+redef class CString super DirectSerializable end
redef class Text super DirectSerializable end
redef class SimpleCollection[E] super Serializable end
redef class Map[K, V] super Serializable end