type t = {min_depth : int; | 
max_depth : int option; | 
follow_links : bool; | 
on_open_errors : error_handler; | 
on_stat_errors : error_handler; | 
filter : ((string * Async.Unix.Stats.t) ‑> bool Async.Deferred.t) option; | 
skip_dir : ((string * Async.Unix.Stats.t) ‑> bool Async.Deferred.t) option; | 
relative_paths : bool; | 
}val default : tval ignore_errors : t