When setting a keybinding, how to know if there is a cursor tab suggestion?

When setting a keybinding, is there ‘when condition’ for if a cursor tab suggestion is visible?

Should inlineSuggestionVisible work? It seems this is for other suggestions?

I’ve tried using When !cpp.shouldAcceptTab but that doesn’t’ seem to work.

I believe this is a bug that it doesn’t seem to honor “!cpp.shouldAcceptTab” when used with other keybindings.