Have you considered looking in the Nim Api docs?
[https://nim-lang.github.io/Nim/unicode.html#runeLenAt%2Cstring%2CNatural](https://nim-lang.github.io/Nim/unicode.html#runeLenAt%2Cstring%2CNatural)
Have you considered looking in the Nim Api docs?
[https://nim-lang.github.io/Nim/unicode.html#runeLenAt%2Cstring%2CNatural](https://nim-lang.github.io/Nim/unicode.html#runeLenAt%2Cstring%2CNatural)