如果我们扩展树并浏览到schoollibrary . ecore文件，我们应该看见所做的更改，如图7所示。

If we expand the tree and navigate into the schoollibrary.ecore file, we should see the changes that were made, as shown in Figure 7.

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现在已经创建了树，您可以扩展获取被请求节点数据的节点了。

Now that the tree is created, you can expand a node that fetches data for the requested node.

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可以选择父表中的任何行，将树扩展到所选父对象的位置。

Any row in the parent table can be selected to expand the tree to the location of the selected parent object.

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