docs: private void initialize() {
          String sep;
          try {
              sep = GroupServiceConfiguration.getConfiguration().getNodeSeparator();
          } catch (Exception ex) {
              sep = DEFAULT_NODE_SEPARATOR;
          }
          groupNodeSeparator = sep;
          if (LOG.isDebugEnabled()) {
              LOG.debug("RDBMEntityGroupStore.initialize(): Node separator set to " + sep);
          }
      }