code: public static boolean isExpression(String text) {
      if (text == null) {
        return false;
      }
      text = text.trim();
      return text.startsWith("${") || text.startsWith("#{");
    }
docs: Checks whether a {@link String} seams to be an expression or not
  
  @param text the text to check
  @return true if the text seams to be an expression false otherwise