任务实例创建动作处理器(清单15)，它保存流程实例上下文的任务实例id。

Task instance creation action handler (Listing 15), storing an id of a task instance in process instance context.

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如果内部类表达式出现在某个实例上下文中的话，内部类可以引用可变的实例域instance field，但这不是同一回事。

Inner classes can refer to mutable instance fields if the inner-class expression occurs in an instance context, but this is not the same thing.

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在TDS代理实例中定义命名上下文。

Define naming context in TDS proxy instance.

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