Based on my research, this interface is not designed to be called by our code. It is designed to be implemented by a managed language service. So it is only used to notify Visual Studio by your language service.
I'd like to receive refactor notification for C# or VB.NET code.We have not expose such an mechanism can let you achieved this, and VB.net does not have re-factoring feature.
You can also check out
How to implement Refactor like Rename operation related to this issue.
Thanks!
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