“flagImages” was executing the runtime hackery every time the collection view asked for a cell. Now it only computes allImages one time.
The identifiers now also output constraint original constant values, which is comes in handy when using auto layout.
Updated the sample app to show where this may be useful.
As a side effect, the sample app can now be used to quiz yourself on the country flags: tap a flag, think of the country name, then tap to see if you were correct.