void
mono_nullable_init (guint8 *buf, MonoObject *value, MonoClass *klass);
+void
+mono_nullable_init_from_handle (guint8 *buf, MonoObjectHandle value, MonoClass *klass);
+
MonoObject *
mono_value_box_checked (MonoDomain *domain, MonoClass *klass, void* val, MonoError *error);