String getFileCommentContent(Element e) {
    if (e == null || result.config.limitComments) return null;

    String f = Element.getFileOfAscendency(e);
    if (f == null && e != null && e.getElementLine() >= 0)
      return "<i>native declaration : line " + e.getElementLine() + "</i>";

    return f == null ? null : getFileCommentContent(new File(f), e);
  }
        public boolean accept(Element value) {
          String s = Element.getFileOfAscendency(value);
          if (s == null) return false;

          File f = new File(s);
          try {
            f = f.getCanonicalFile();
          } catch (IOException e) {
            e.printStackTrace();
          }
          return libraryByFile.containsKey(f);
        }