BackOffVM.kt

  val dogImagesFlow = getDogImages().flowOn(Dispatchers.IO)
        .retryWhen { cause, attempt ->
            if (cause is IOException && attempt < 3) {
                val delay = 2000 * (attempt + 1)
                emit(
                    ResultWrapper.NetworkError(
                        "Attempt No ${attempt + 1} Failed.Retrying again in time ${delay / 1000} sec...",
                        delay.toInt()
                    )
                )
                delay(delay)
                return@retryWhen true
            } else {
                emit(ResultWrapper.NetworkError("Retries Expired!", null))
                return@retryWhen false
            }
        }.catch {
            //catch Exception
        }