["Request"] Generate Lens for sealed class abstract val

[Kernald]

What version are you currently using?
1.1.3

What would you like to see?
As per arrow-kt/arrow-optics#5 which seems to have been lost when things were consolidated in this repo, with a sealed class of the following shape:

sealed class Example {
  abstract val name: String

  data class One(override val name: String, val int: Int) : Example()
  data class Two(override val name: String, val long: Long) : Example()
  data class Three(override val name: String, val double: Double) : Example()
}

I would love seeing a generated val name: Lens<Example, String>, which would look like this:

val name: Lens<Example, String> = Lens(
  get = { it.name },
  set = { example, name ->
    when (example) {
      is One -> example.copy(name = name)
      is Two -> example.copy(name = name)
      is Three -> example.copy(name = name)
    }
  },
)

This is a bit boilerplate-y, and needs updating whenever a sub-type is added. It seems like a good candidate for code generation.

[serras]

Fixed by #3359, will be released on 1.2.2.