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');
}