JpaEmbeddable embeddable = entityMap.embeddableForClass(key);
if (embeddable != null) {
// create enhancer chain
EmbeddableVisitor e1 = new EmbeddableVisitor(out);
// this ensures that both enhanced and original classes have compatible
// serialized
// format even if no serialVersionUID is defined by the user
SerialVersionUIDAdder e2 = new SerialVersionUIDAdder(e1);