public function getPlanItem($code = null, $itemCode = null) {
		$items = $this->getPlanItems($code);
		if (!$itemCode && count($items) > 1) {
			throw new CheddarGetter_Response_Exception("This plan contains more than one item so you need to provide the code for the item you wish to get", CheddarGetter_Response_Exception::USAGE_INVALID);
		}
		if (!$itemCode) {
			return current($items);
		}
		return $items[$itemCode];
	}