What is the pattern we are all using, but no-one t...

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[Halina]

What is the pattern we are all using, but no-one talks about? Read the article written by @marcinmoskala and find out 👇
https://kt.academy/article/ak-covariant-nothing-object
📖 This is a chapter from the Advanced Kotlin book
https://leanpub.com/advanced_kotlin/