// FIR_IDENTICAL @RequiresOptIn annotation class Boom @RequiresOptIn annotation class Boom2 @SubclassOptInRequired(Boom::class) open class B { @SubclassOptInRequired(Boom2::class) open class C @OptIn(Boom2::class) class C2 : C() } @OptIn(Boom2::class) class E2 : B.C() {}