/**
  * Convenience method for getting a bean implementation class.
  *
  * @param <T> the type of bean to return
  * @param beanName the name of the bean
  * @return the implementation class of the bean
  */
 public <T> Class<T> getBeanImplClass(final String beanName) {
   return beanFactory.<T>getBeanImplClass(beanName);
 }