anyway to make xcode stop completing on stupid things?

If i type:

  x = true

and pause the wrong amount of time, a completion menu comes up. when i hit return, it puts in some strange symbol, because xcode deemed that “true” was close enough to some image in my asset catalog. similar for a bunch of other stuff, like typeing

  map { _ in
}

i.e. i get stupid completions on in.

Is there anyway to make xcode not popup menus for when you’ve typed a keyword???