FILE /Derived.kt
  CLASS CLASS Derived
    CONSTRUCTOR public constructor Derived()
      BLOCK_BODY
        DELEGATING_CONSTRUCTOR_CALL Base
        INSTANCE_INITIALIZER_CALL classDescriptor=Derived
    FUN public final fun setValue(/*0*/ v: kotlin.Any): kotlin.Unit
      BLOCK_BODY
        WHEN type=kotlin.Unit operator=IF
          if: TYPE_OP operator=INSTANCEOF typeOperand=kotlin.String
            GET_VAR v type=kotlin.Any operator=null
          then: BLOCK type=kotlin.Unit operator=null
            SET_BACKING_FIELD value type=kotlin.Unit operator=EQ
              receiver: THIS public final class Derived : Base type=Derived
              value: TYPE_OP operator=IMPLICIT_CAST typeOperand=kotlin.String!
                GET_VAR v type=kotlin.Any operator=null
