isn't

TurbineTimeoutCancellationException

already our custom timeout exception?

It's a subclass though, right?

internal class TurbineTimeoutCancellationException internal constructor(
  message: String,
) : CancellationException(message)

it's not a subclass of timeout exception, if that's what you meant?

I'll have to look on a computer. The bottom line is we need to differentiate between our timeout and a user exception that happens to be a timeout