aad19ab844
"data objects" is only available since language version 1.9. But we should not use LV 1.9, because it is used in the Gradle build classpath and would be incompatible with Gradle Kotlin runtime. Then only manually override equals/toString/ works here. #KT-61657 Fixed Merge-request: KT-MR-12759 Merged-by: Dmitrii Krasnov <Dmitrii.Krasnov@jetbrains.com>