code: public List<URL> getManagedURLs()
      {
          // should we cache it?
          List<URL> managedURL = getJarFileUrls();
          if (managedURL == null)
          {
              managedURL = new ArrayList<URL>(1);
          }
  
          if (!getExcludeUnlistedClasses())
          {
              managedURL.add(getPersistenceUnitRootUrl());
          }
          return managedURL;
      }
docs: Returns list of managed urls.
  
  @return