IStdlib.SafeLazyA wrapper around a lazy value that can be forced in a thread-safe manner. NB values made with make cannot be marshalled, but values made with from_val can.
val make : 'a IStdlib.IStd.Lazy.t -> 'a tval from_val : 'a -> 'a tval from_val_option : 'a option -> 'a t optionval force : 'a t -> 'aval force_option : 'a t option -> 'a option