PersistenceSession session = persistenceManager.createSession();
try {
DynamicCompEntity inst = new DynamicCompEntity();
inst.setId(11);
DynamicComposite dyn = new DynamicComposite();
dyn.addBool(true);
dyn.addUtf8String("Ursus");
dyn.addInt(42);
inst.setDyn(dyn);
session.insert(inst);