Thanks, that's convincing. (why I was in doubt, is because while immutable functional collections that clojure embaces are naturally thread-safe, there is an i

Thanks, that's convincing. (why I was in doubt, is because while immutable functional collections that clojure embaces are naturally thread-safe, there is an imperative aspect in creation of a lazy sequence from user provided function, and I was not sure clojure has to provide synchronization guarantees here)