let active_loggers : (t, int) Hashtbl.t = Hashtbl.create 17
let margin = List.fold_left (fun m l -> max m (String.length l)) 0 loggers
let available () = loggers
let active_loggers : (t, int) Hashtbl.t = Hashtbl.create 17
let margin = List.fold_left (fun m l -> max m (String.length l)) 0 loggers
let available () = loggers