@Override
      public @Nullable @Nls String getComment(int pattern) {
        if (getFileCount(pattern) == 1) {
          if (myPattern2Description.containsKey(pattern)) {
            return myPattern2Description.get(pattern).getComment();
          }
          return cacheGroupNodeDescription(pattern).getComment();
        }
        return null;
      }
@Override
      public @Nullable @Nls String getComment(int pattern)