docs: @Override
      public java.util.Iterator findEntitiesForGroup(IEntityGroup group) throws GroupsException {
          if (log.isDebugEnabled())
              log.debug(
                      DEBUG_CLASS_NAME
                              + ".findEntitiesForGroup(): retrieving entities for group "
                              + group);
  
          Collection entities = null;
          File f = getFile(group);
          if (f.isDirectory()) {
              entities = Collections.EMPTY_LIST;
          } else {
              entities = getEntitiesFromFile(f);
          }
  
          return entities.iterator();
      }