as I said before <@U0BFDUP0E> there are sequences ...

# stdlib

[apatrida]

as I said before @jw there are sequences in Kotlin that are constrained to return an iterator only 1 time: https://github.com/JetBrains/kotlin/blob/74c13906ed7fd47c0d68b64a0db7c467c93d7379/libraries/stdlib/src/kotlin/collections/Sequences.kt#L476-L484