module Level: sig .. end
type [ `Debug | `Error | `Info ] 
Describes both the level of a log and the level of a message sent to a log.  There
      is an ordering to levels (`Debug < `Info < `Error), and a log set to a level will
      never display messages at a lower log level.
include Stringable
val t_of_sexp : Sexplib.Sexp.t -> t
val __t_of_sexp__ : Sexplib.Sexp.t -> t
val sexp_of_t : t -> Sexplib.Sexp.t