ORDER_STATE_CLOSED 是 {@struct/Order Order} 结构中的 Status 属性的值，表示订单状态为已完成。
number
ORDER_STATE_CLOSED 的值为 1。
{@var/ORDER_STATE/ORDER_STATE_PENDING ORDER_STATE_PENDING}, {@var/ORDER_STATE/ORDER_STATE_CANCELED ORDER_STATE_CANCELED}, {@var/ORDER_STATE/ORDER_STATE_UNKNOWN ORDER_STATE_UNKNOWN}