/**
* Provides the count of the total number of different items in the cart
*
* @api `shopp('cart.total-items')`
* @since 1.2
*
* @param string $result The output
* @param array $options The options
* @param ShoppCart $O The working object
* @return int The number of items in the cart
**/
public static function total_items($result, $options, $O)
{
return (int) $O->count();
}
