*/
private static final long serialVersionUID = -1635913024455984627L;
public void writeExternal(Object subject, ObjectOutput output) throws IOException {
DeltaAware dw = (DeltaAware) subject;
output.writeObject(dw.delta());
}
public Object createExternal(Class<?> subjectType, ObjectInput input, Creator defaultCreator)
throws IOException, ClassNotFoundException {
return input.readObject();