code: public boolean containsValidRegEx() {
  
          try {
              java.util.regex.Pattern.compile(super.getAttributeValue());
              return true;
          } catch (final PatternSyntaxException e) {
              // NOP
          }
  
          return false;
      }
docs: checks the value in this attribute contains a valid regex.
  
  @return true if this attribute contains a valid regex
  @since 3.0.1
  @author WFF