FILE fqName:<root> fileName:/kt5493.kt
  FUN name:box visibility:public modality:FINAL returnType:kotlin.String
    BLOCK_BODY
      TRY type=kotlin.Nothing
        try: BLOCK type=kotlin.Nothing origin=null
          RETURN type=kotlin.Nothing from='public final fun box (): kotlin.String declared in <root>'
            CONST String type=kotlin.String value="OK"
        finally: TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
          BLOCK type=kotlin.String? origin=SAFE_CALL
            VAR IR_TEMPORARY_VARIABLE name:tmp_0 type:kotlin.Nothing? [val]
              CONST Null type=kotlin.Nothing? value=null
            WHEN type=kotlin.String? origin=null
              BRANCH
                if: CALL 'public final fun EQEQ (arg0: kotlin.Any?, arg1: kotlin.Any?): kotlin.Boolean declared in kotlin.internal.ir' type=kotlin.Boolean origin=EQEQ
                  ARG arg0: GET_VAR 'val tmp_0: kotlin.Nothing? declared in <root>.box' type=kotlin.Nothing? origin=null
                  ARG arg1: CONST Null type=kotlin.Nothing? value=null
                then: CONST Null type=kotlin.Nothing? value=null
              BRANCH
                if: CONST Boolean type=kotlin.Boolean value=true
                then: CALL 'public final fun toString (<this>: kotlin.Any?): kotlin.String declared in kotlin' type=kotlin.String origin=null
                  ARG <this>: TYPE_OP type=kotlin.Nothing origin=IMPLICIT_CAST typeOperand=kotlin.Nothing
                    GET_VAR 'val tmp_0: kotlin.Nothing? declared in <root>.box' type=kotlin.Nothing? origin=null
