// "Remove useless is check" "true" interface Base interface Derived: Base fun foo(bar: Base):Int { return when (bar) { is Derived -> 0 is Base -> 42 else -> 1 } } // FUS_QUICKFIX_NAME: org.jetbrains.kotlin.idea.quickfix.RemoveUselessIsCheckFixForWhen // FUS_K2_QUICKFIX_NAME: org.jetbrains.kotlin.idea.quickfix.RemoveUselessIsCheckFixForWhen