code: public void setDataformXSLT(String url) {
          addField(ConfigureNodeFields.dataform_xslt, FormField.Type.text_single);
          setAnswer(ConfigureNodeFields.dataform_xslt.getFieldName(), url);
      }
docs: Sets the URL of an XSL transformation which can be applied to the payload
  format in order to generate a valid Data Forms result that the client could
  display using a generic Data Forms rendering engine.
  
  @param url The URL of an XSL transformation