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Sealed Classes in Kotlin: How to handle the missing .copy() method (2026 Update)
Sealed classes in Kotlin don’t have a .copy() method like data classes do. Here’s how to update them anyway using Arrow Optics Prisms for clean immutability.
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How to fix the pain of modifying Kotlin nested data classes
Using Arrow Lenses to simplify deeply nested data class updates in Kotlin, replacing verbose chained .copy() calls.