Create extension to provide custom cell Editor

I am trying to understand the moving part to create a lab extension to provide alternative cell editor for code cell. Looking at docs and example is not clear to me how to wire the factory part with a custom editor and what protocol / api contract must be fulfilled.

Is there any example or documentation I should be looking at?

Thank you for the help

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Hey @colombod, this is not easy. In the past I started some work on using Monaco instead of codemirror. Although this was for 0.35, you may find some useful information on that PR

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Will look at it, thank you. So that pr is aimed at replacing code mirror editor as cell editor right?