``` interface Logger<F> { fun warn(msg: St...

# arrow

[raulraja]

interface Logger<F> {
  fun warn(msg: String): Kind<F, Unit>
}
class ConsoleLogger<F>(S: Sync<F>): Logger<F>, Sync<F> by S {
  override fun warn(msg: String): Kind<F, Unit> =
    S.delay { println("WARN: $msg") }
}