Awskit_s3_sim.Clockval create : ?now:Ptime.t -> unit -> tCreate a clock. Defaults to a stable initial timestamp when now is omitted.
val now : t -> Ptime.tReturn the current simulated time.
val advance : t -> Ptime.Span.t -> unitAdvance simulated time by a span.
val advance_ms : t -> int -> unitAdvance simulated time by milliseconds.