code: public final static String process(final Reader reader, final Decorator decorator) throws IOException
      {
          return process(reader, Configuration.builder().setDecorator(decorator).build());
      }
docs: Transforms an input stream into HTML.
  
  @param reader
  The Reader to process.
  @param decorator
  The decorator to use.
  @return The processed String.
  @throws IOException
  if an IO error occurs
  @see Configuration#DEFAULT