Logs.LOGval app : 'a logval err : 'a logval warn : 'a logval info : 'a logval debug : 'a logval on_error : ?level:level -> ?header:string -> ?tags:Tag.set ->
pp:(Stdlib.Format.formatter -> 'b -> unit) -> use:('b -> 'a) -> ('a, 'b) Stdlib.result -> 'aval on_error_msg : ?level:level -> ?header:string -> ?tags:Tag.set -> use:(unit -> 'a) ->
('a, [ `Msg of string ]) Stdlib.result -> 'a