它还允许你用你想要的任何东西完全替换控件的视觉树(visual tree)，同时还保持控件的同样行为。
It optionally allows you to completely replace a control's visual tree with anything you want - while still keeping the control behavior intact.
这种精简行为改变了逻辑消息树的形状，这就是创建新域的原因。
This compact behaviour alters the shape of the logical message tree, which is why a new domain was created.
此外，除非您需要更改树导航的行为，并且对布局有充分的理解，否则不应该对此进行更改。
Again, you shouldn't change this unless you need to change the behavior of the tree navigation and have a full understanding of the layout.
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