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