SwiftUI’s `Picker` has multiple selection support via its `init(_:sources:selection:)` constructor, which is incredibly useful. Unfortunately, I've discovered if `sources` ever goes empty it just crashes with nary a log message or indicator as to why.
On the other hand, if you do something boneheaded (which is apparently a preferred pastime of mine) and ask a `Picker` to select a value that's not _in_ the `Picker`, it'll emit a helpful console message telling you that, along with the missing tag. Helpful!