Multiplier ako predat parameter (string)?

Caute neviete mi poradit ako predam Multiplieru parameter string?

	protected function createComponentBlock()
	{
		$that = $this;
		return new Multiplier(function ($slug) use ($that) {
			$block = $that->blockControl->create($slug);;
			return $block;
		});
	}

{var $noveAkcie = 'nove-akcie';}
{control block-$noveAkcie}