release-and-retrieve capability 释放和收回能力
Subsequent calls to load will retrieve the objects in the same order. Listing 2 shows this capability in action.
随后调用load来以同样的顺序检索这些对象。
If we wish to design a service offering database update capability, we could offer operations corresponding to the retrieve and write operations in lines 2 and 4 in Listing 8.
如果我们希望设计一个提供数据库更新功能的服务，则可以提供与清单8中的第2行和第4行的检索和写入操作对应的操作。
Thus, you need to retrieve the parent of the capability to examine the unit.
因此，您需要获得功能的父类以检查单元。
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