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I have a question regarding 'Utils' vs 'Extension functions'. When a class 'misses' a generic method, it can be define as 'extension function'. When it is very specific, it can be done `private` or `internal`. What about one which is 'kind of generic' but not really widespread. I am thinking about utilities for commonly used classes like `String` or `Context` in Android, where abusing extension function might lead to a very polluted auto complete