protected function recurseString(array $string)
	{
		$isOptional = $this->isOptional;
		foreach ($string as $k => $element)
		{
			if (is_array($element))
			{
				$string[$k] = $this->runner->run($element);
			}
		}
		$this->isOptional = $isOptional;

		return $string;
	}