https://github.com/arrow-kt/arrow
https://github.com/arrow-kt/arrow/tree/main/arrow-libs/optics
obsolete
https://github.com/arrow-kt/arrow-optics

https://mvnrepository.com/artifact/io.arrow-kt/arrow-optics

https://arrow-kt.io/learn/quickstart/#additional-setup-for-plug-ins
    plugins {
      id("com.google.devtools.ksp") version "2.1.20-2.0.0"
    }
    dependencies {
      implementation("io.arrow-kt:arrow-optics:2.1.0")
      ksp("io.arrow-kt:arrow-optics-ksp-plugin:2.1.0")
    }
https://arrow-kt.io/learn/immutable-data/intro/
https://arrow-kt.io/learn/immutable-data/lens/

https://old.arrow-kt.io/docs/optics/