docs: public Enumeration getPKEnumerationByQuery(Class primaryKeyClass, Query query) throws PersistenceBrokerException
      {
          if (logger.isDebugEnabled()) logger.debug("getPKEnumerationByQuery " + query);
  
          query.setFetchSize(1);
          ClassDescriptor cld = getClassDescriptor(query.getSearchClass());
          return new PkEnumeration(query, cld, primaryKeyClass, this);
      }