I am looking into developing simple Extension for VS-Code/IntelliJ, while on IntelliJ side I know everything needed achieve what I need, I was unable to find much relevant stuff when it comes to VS-Code.

I need to get the list of all provided autocompletions – ideally before they are rendered, and then remove some completions as needed.

So far I know about CompletionItemProvider and how to use it to add new completions, but I was unable to find anything relevant to manipulating other completions

Is there anything that can be done here?