api/jar/src/main/java/javax/slee/usage/UsageNotification.java
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
        vendorData = VendorExtensionUtils.readObject(in, vendorDataDeserializationEnabled);
    }
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
        vendorData = VendorExtensionUtils.readObject(in, vendorDataDeserializationEnabled);
    }
special handling of deserialization