Choosing between categories and expando.
在categories和expando之间选择。
You need to clear the expando states when the tree grid performs a sorting query.
当树型网格执行一个排序查询时，您需要清除expando状态。
After investigating, you find that the tree grid would always hold the states of expando functions.
调查之后，您发现树型网格总是保留expando函数的状态。
Expandos, on the other hand, are global in nature: Once the expando code has executed, those changes appear for the rest of the application.
另一方面，Expandos本质上是全局的：一旦expando代码执行，这些改变将会出现在应用程序的其余部分中。
Also note that this class extends Expando, as this will be important later.
同时也要注意这个类继承了Expando，因为这个在后面很重要。
Also note that this class extends Expando, as this will be important later.
同时也要注意这个类继承了Expando，因为这个在后面很重要。
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