You need the parameters in Listing 2 to construct a TreeModel.

您需要清单2中的参数来构建一个TreeModel。

youdao

Look through the source code of TreeGrid and TreeModel in Listing 6 to see how expanding sub-rows work.

仔细查看清单6中的TreeGrid和treemodel源代码，看看如何展开子条目。

youdao

To get started, you need to define the query of the ForestStoreModel (an implementation of TreeModel) to return the multiple top-level items for the TreeGrid.

开始之前，您需要定义ForestStoreModel (TreeModel的一个实现)的查询来返回TreeGrid的多个顶级条目。

youdao