Module Session.S
type error=|Not_foundThe key was not found.
|Not_setThe key was found but had no associated value.
The type of a session error.
These will only be returned by the
S.Now.getandS.Future.getoperations.
module type Now = sig ... endThe signature for synchronous backends.
module type IO = sig ... endThe signature for a blocking computations.
module type Thread_IO = sig ... endThe signature for blocking computations that can run synchronous computations in a separate thread
module type Future = sig ... endThe signature for asynchronous backends.