您还需要将一些简单的存取器方法添加到SimpleNode。

You also need to add a few simple accessor methods to SimpleNode.

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这意味着这些代码将直接存取成员变量表现为通过存取器方法访问。

What this means is that the code above really boils down to a case where you're accessing member fields through accessor methods.

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除了通常的事件方法之外，workevent类还为这些类型的事件(接受、拒绝、启动或完成)以及有问题的工作项目提供了存取器。

In addition to the usual event methods, the WorkEvent class provides accessors for the type of event (accepted, rejected, started, or completed) and the item of work in question.

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