FluidTYPO3\Flux\ViewHelpers\Field\UserFuncViewHelper::initializeArguments PHP Method

    public function initializeArguments()
    {
        parent::initializeArguments();
        $this->registerArgument('userFunc', 'string', 'Classname->function notation of UserFunc to be called, example "Tx_Myext_Configuration_FlexForms_MyField->renderField" - Extbase classes need autoload registry for this', TRUE);
        $this->registerArgument('arguments', 'array', 'Optional array of arguments to pass to the UserFunction building this field');
    }

 /**
  * Initialize
  * @return void
  */
 public function initializeArguments()
 {
     parent::initializeArguments();
     $this->overrideArgument('userFunc', 'string', 'User function to render the Closure built by this ViewHelper', FALSE, self::DEFAULT_USERFUNCTION);
 }