module Sequencer:sig..end
type 'a t
val create : ?continue_on_error:bool -> 'a -> 'a tval enqueue : 'a t -> ('a -> 'b Deferred.t) -> 'b Deferred.tval prior_jobs_done : 'a t -> unit Deferred.tval num_jobs_waiting_to_start : 'a t -> int