Model UI States with Kotlin Sealed Types
Model mutually exclusive UI states with Kotlin sealed types so the compiler flags missing branches instead of letting invalid states slip through runtime.
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kotlinModeling UI State with Kotlin Sealed Interfaces: Let the Compiler Catch Your Missing Cases
Nullable data/error field pairs silently break when a new state is added. Kotlin sealed interfaces make the set of states closed, so the compiler flags every when that misses a case.