How to hide a node in layout?

[linrongbin16]

Hi, here is my question:

A parent node A, has 3 children nodes B,C,D.

At a time, A only shows B and C inside it. In another time, A only shows D. So I have to hide D when displaying B+C, and hide B+C when displaying D.

Guess one solution is using "insert_child"/"remove_child" to temporarily remove the child node and insert it back. But I still wonder if there's any other solutions such as using something like "z-index" or "hidden" properties to hide it?