Intellisense not working -- Solved

I was given the task of refactoring some code as the UI changed but when I try to invoke functions from other classes the intellisense does not seem to work. Is there a fix or workaround for this one? I tried doing the same in VSCode and I see the intellisense working, not sure why TestComplete's intellisense does not work.

Edit: Just saw a post saying it only works for TestComplete stuff.