val level : unit -> Level.t
val set_level : Level.t -> unit
val set_output : Output.t -> unit
val set_time_source : Async_unix__.Import.Synchronous_time_source.t -> unit
val set_transform : (Message.t -> Message.t) option -> unit
val raw : ?time:Core.Time.t -> ?tags:(string * string) list -> ('a, unit, string, unit) Core.format4 -> 'a
val info : ?time:Core.Time.t -> ?tags:(string * string) list -> ('a, unit, string, unit) Core.format4 -> 'a
val error : ?time:Core.Time.t -> ?tags:(string * string) list -> ('a, unit, string, unit) Core.format4 -> 'a
val debug : ?time:Core.Time.t -> ?tags:(string * string) list -> ('a, unit, string, unit) Core.format4 -> 'a
val raw_s : ?time:Core.Time.t -> ?tags:(string * string) list -> Core.Sexp.t -> unit
val info_s : ?time:Core.Time.t -> ?tags:(string * string) list -> Core.Sexp.t -> unit
val error_s : ?time:Core.Time.t -> ?tags:(string * string) list -> Core.Sexp.t -> unit
val debug_s : ?time:Core.Time.t -> ?tags:(string * string) list -> Core.Sexp.t -> unit
val sexp : ?level:Level.t -> ?time:Core.Time.t -> ?tags:(string * string) list -> Core.Sexp.t -> unit
val surround_s : ?level:Level.t -> ?time:Core.Time.t -> ?tags:(string * string) list -> Core.Sexp.t -> (unit -> 'a) -> 'a
val surroundf : ?level:Level.t -> ?time:Core.Time.t -> ?tags:(string * string) list -> ('a, unit, string, (unit -> 'b) -> 'b) Core.format4 -> 'a