I have previously made use of ECJ 15 to evolve behavior from within the 
Xholon open-source modeling tool. I tried it with ECJ 16, and it works 
with just a few small changes.

In these models, Xholon and ECJ nodes coexist within the same Java tree 
structure. I have to change the declaration of the ECJ GPTree and GPNode 
classes, so that they implement IXholon and extend Activity, and then 
add a few new methods.

Thanks to Sean and the rest of the ECJ team,

Ken Webb

Ottawa, Ontario, Canada
Xholon and Cellontro open-source projects.