block17.kt

when (continuation.label) {
    0 -> {
        // check exceptions
        throwOnFailure(result)

        log("start")
        // Assign 1 to label, ready for the next state
        continuation.label = 1

        // Call getUserInfo()
        suspendReturn = getUserInfo(continuation)

        // Determine if it suspended
        if (suspendReturn == sFlag) {
            return suspendReturn
        } else {
            result = suspendReturn
            //go to next state
        }
    }

    1 -> {
        throwOnFailure(result)

        // Get user value from result
        user = result as String
        log(user)
        // Saving user value in continuation
        continuation.mUser = user
        // Ready for next state
        continuation.label = 2

        // Call getFriendList
        suspendReturn = getFriendList(user, continuation)

        // Determine if it suspended
        if (suspendReturn == sFlag) {
            return suspendReturn
        } else {
            result = suspendReturn
            //go to next state
        }
    }

    2 -> {
        throwOnFailure(result)

        user = continuation.mUser as String

        // Get friendList value from result
        friendList = result as String
        log(friendList)

        // Saving values in continuation
        continuation.mUser = user
        continuation.mFriendList = friendList

        // Ready for next state
        continuation.label = 3

        // Call getFeedList
        suspendReturn = getFeedList(friendList, continuation)

        // Determine if it suspended
        if (suspendReturn == sFlag) {
            return suspendReturn
        } else {
            result = suspendReturn
            //go to next state
        }
    }

    3 -> {
        throwOnFailure(result)

        user = continuation.mUser as String
        friendList = continuation.mFriendList as String
        feedList = continuation.result as String
        log(feedList)
        loop = false
    }
}

You are correct, this is the best explanation of CoRoutines I have ever read, at a level of technical detail that uniquely doesn't require the same level of prior knowledge to understand it.
3 years now working with coroutines -- and I previously knew all of the individual details presented (and much more), but I did not understand them as well before.
Thank you !