Orange lib help

[Dan]

Hi -

I get some errors from this simple code:
class Class_a {
   double[2][2] ob;
}
class Class_b : Class_a { int obb;}
Serializer.register!(Class_b);

The error is:
Error: variable 
orange.serialization.Serializer.Serializer.serializeArray!(inout(double[2LU][2LU])).serializeArray.__lambda2008.__aggr2839 
inout variables can only be declared inside inout functions

I can't seem to find any answers in the documentation. Anybody 
could help me out?

thanks
dan