code: public FacesConfigDefaultValidatorsType<T> validatorId(String ... values)
     {
        if (values != null)
        {
           for(String name: values)
           {
              childNode.createChild("validator-id").text(name);
           }
        }
        return this;
     }
docs: Creates for all String objects representing <code>validator-id</code> elements,
  a new <code>validator-id</code> element
  @param values list of <code>validator-id</code> objects
  @return the current instance of <code>FacesConfigDefaultValidatorsType<T></code>