'utilities.ts' is an API surface hazard

utilities.ts consists of 4 different namespaces:

• one which seems to be entirely internal
• one which is entirely exposed
• one which is entirely exposed and is entirely type predicate functions
• one which is a random assortment of internal and exposed functions that have no consistent usage

Just from my intuition and experience, I don't think this is a good idea. It's just too easy to put a new helper in some random section of the file and forget whether or not it's being exposed.

As a naive first approximation, here's what I think would be more appropriate for each respective namespace:

• utilities.ts
• publicUtilities.ts
• publicPredicates.ts
• I don't know, TBD.

Beginne mit dem Lesen von utilities.ts und katalogisiere die vier Namespaces. Notiere dabei, welche Funktionen intern, exponiert oder Typprädikate sind. Lege für jede Gruppe ein konsistentes Ziel fest, einschließlich des derzeit noch ungeklärten gemischten Namespaces. Als abgeschlossen gilt die Aufgabe, wenn die Organisation der Utilities und die Grenzen ihrer Exponierung klar und konsistent angewendet sind.