code: @Override
      protected String evalApplication()
      {
          String ret = null;
          final Pattern revisionPattern = Pattern.compile("@eFapsApplication[\\s].*");
          final Matcher revisionMatcher = revisionPattern.matcher(getCode());
          if (revisionMatcher.find()) {
              ret = revisionMatcher.group().replaceFirst("^@eFapsApplication", "");
          }
          return ret == null ? null : ret.trim();
      }
docs: This Method extracts the Revision from the program.
  
  @return Revision of the program