The tree model will ask the store to load the parent item first.
树模型首先请求存储库加载父条目。
The parent item is not fully loaded because its children attribute is not an array that lists all the children of this item.
父条目不能被完全加载，因为其children属性不是一个列出所有子条目的数组。
A parent item is the item that has some other subitem associated with it.
一个父选项有很多和它关联的子项。
This property provides only basic state information about the parent item.
这个属性只提供父项目的基本状态资讯。
You can use this property, for example, to determine whether the parent item is selected, checked, or focused.
例如，可以使用此属性确定父项是否被选择、选中或具有焦点。
Collapse selected item (tree views and search results). If the item is already collapsed, this will select its parent item.
折叠选择的项(树视图和搜索结果)。如果该项已经折叠，这将选择它的父项。
Collapse selected item (tree views and search results). If the item is already collapsed, this will select its parent item.
折叠选择的项(树视图和搜索结果)。如果该项已经折叠，这将选择它的父项。
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