Represents the set of execution contexts, created by the current activity, that have been completed and were persisted upon their completion.
表示由当前活动创建的、已经完成并且完成后已保留的执行上下文集。
Represents the set of execution contexts, created by the current activity, that have been completed and were persisted upon their completion.
表示由当前活动创建的、已经完成并且完成后已保留的执行上下文集。
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