@Override
    protected CollectionSchema.MessageFactory getCollectionFactory(Class<?> clazz)
    {
        return getRuntimeCollectionFactory(clazz);
    }
Register a {@link Delegate} and assign an id.
<p>
Delegate ids start at 1.
protostuff-runtime-registry/src/main/java/io/protostuff/runtime/IncrementalIdStrategy.java