最后，我们希望将输出发送到指定的目的地，使用输出功能。
Finally we want to send the output to a given destination, using the output function.
如果需要，可以使用instance of运算符来确定指定的目的地子类型。
If required, the instanceof operator can be used to determine the specific destination subtype.
制造商可以对药店系统执行查询，确保发送的产品通过供应链顺利到达指定的目的地。
Manufacturers could make inquiries on pharmacy systems to ensure that the shipped product made it through the supply chain to its intended destination.
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