Inheritance: extends TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper, use trait FluidTYPO3\Vhs\Traits\ArrayConsumingViewHelperTrait
 /**
  * @return void
  */
 public function initializeArguments()
 {
     parent::initializeArguments();
     $this->registerArgument('b', 'mixed', 'Second number or Iterator/Traversable/Array for calculation', true);
 }