code: public static void renderDOT(File dotFile, boolean modal) throws IOException {
          renderDOT(IOUtil.asBufferedUTF8Reader(dotFile), modal);
      }
docs: Renders a GraphVIZ description from a string and displays it in a Swing window. Convenience method, see {@link
  #renderDOT(Reader, boolean)}.
  
  @throws FileNotFoundException
  if opening the file resulted in errors.