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something that you can call flatMap() on. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flatMap https://developer.mozi

something that you can call flatMap() on. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flatMap https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...