There are increasingly situations where only utils are consumed from arnie (eg for dot-bracket parsing), but unless a fake package is configured arnie will throw an error because importing from utils automatically checks for packages and errors if none are configured. Frankly that check doesn't seem particularly useful, since if you want to error about a missing package configuration when calling methods that require specific packages anyways
There are increasingly situations where only utils are consumed from arnie (eg for dot-bracket parsing), but unless a fake package is configured arnie will throw an error because importing from utils automatically checks for packages and errors if none are configured. Frankly that check doesn't seem particularly useful, since if you want to error about a missing package configuration when calling methods that require specific packages anyways