config-prettyfaces/src/main/java/com/ocpsoft/pretty/faces/el/Expressions.java
public static boolean containsEL(final String value)
   {
      if (value == null)
      {
         return false;
      }

      return elPattern.matcher(value).find();
   }
public static boolean containsEL(final String value)
   {
      if (value == null)
      {
         return false;
      }

      return elPattern.matcher(value).find();
   }
Return true if the value contains an EL expression.