I've added this two methods:

 /**
 * Get bean factory from underlying bean meta data.
 *
 * Note: this one includes all nested beans from
 * underlying bean metadata.
 *
 * @return bean meta data factory
 */
 public abstract BeanMetaDataFactory getBeanMetaDataFactory();

 /**
 * Get underlying bean as BeanMetaDataFactory.
 *
 * Note: this method doesn't include nested beans from
 * underlying bean metadata.
 *
 * @return bean meta data factory
 */
 public BeanMetaDataFactory asBeanMetaDataFactory()
 {
 return new BeanMetaDataFactory()
 {
 public List<BeanMetaData> getBeans()
 {
 return Collections.singletonList(getBeanMetaData());
 }
 };
 }