      update the textField view if neccessary.
     */
     private func engin() -> Bool {
-        print(#function)
-        print(self.className)
-        print(self.regex)
         var res: Bool = false
         if let regex = self.regex {
             let predicate = NSPredicate(format:"SELF MATCHES %@", regex)

     - Parameter textField: Action.
     */
    func textFieldDidChange(textField: UITextField) {
        print(#function)
        self.engin()
    }
    

     - Returns: Void.
    */
    private func parseRulesValidator() {
        if let className = self.className {
            let Class = NSObject.fromClassName(className)
            self.regex = Class?.regex ?? nil
        } else if let rules = self.rulesValidator {
            self.regex = rules.regex
