code.constant().setNull();
code.constant().setValue(0);
code.invokeinterface().setMethod(Proxy.class, "setOwner", void.class,
new Class[] { OpenJPAStateManager.class, int.class });
code.aload().setLocal(other);
code.areturn();
code.calculateMaxStack();
code.calculateMaxLocals();
if (changeTracker) {
m = bc.declareMethod("getChangeTracker", ChangeTracker.class, null);