The notebookEditorDecorationType currently is not on track for finalization. In order to decide what to do with it, we would like to know how this api is currently being used and if there would be any big concerns around removing it

Here are the current consumers:

• Jupyter @rchiodo @DonJayamanne
• Jupyter powertoys @rchiodo @DonJayamanne
• Dot Net Interactive @brettfo, @colombod

Please check if your extension is using this api. If it is, can you explain how the api is used today and if there are alternative approach you could use to implement the functionality?