How to add button to custom tool window bar, likes Project/Structure tool window?
Hello,
I want to add several buttons to my custom tool window, likes Project/Structure tool window. I followed the Actions Tutorial and don't know what the group-id for my custom tool window.

Thanks,
Yang
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See `com.intellij.openapi.wm.ex.ToolWindowEx#setTitleActions`
Ex:
https://github.com/JetBrains/intellij-community/blob/master/platform/lang-impl/src/com/intellij/ide/favoritesTreeView/FavoritesTreeViewPanel.java#L558
Thank you Aleksey, it works.