Is there any way to customize the autocomplete popup menu vscode?

I am creating an extension and I need to customize the suggestionsMenu. I want to add numbers at the end of the suggestions.

I am not asking for complete solution. I am only asking for start up for just to edit the autocomplete menu and add some custom text at end of it. I have searched alot but not found a way to edit the auto complete menu.

Edit: Searching for this I found out that it maybe linked vscode.CompletionItemProvider

Edit: It don't want numbers specifically at end of line. They could be in start of the complete item.

from Is there any way to customize the autocomplete popup menu vscode?