Akka.NET F# API PreStart and PostStop handling

example.fs

let aref = 
    spawn system "actor"
    <| fun mailbox ->
        printf "pre-start"  // this section works like pre-start
        mailbox.Defer (fun () -> printf "post-stop") // this registers a function to be called on PostStop
        let rec loop () =
            actor {
                let! msg = mailbox.Receive ()
                // do some work
                return! loop ()
            }
        loop ()