external scrub_device : t -> string -> unit = "ocaml_guestfs_scrub_device"
external scrub_file : t -> string -> unit = "ocaml_guestfs_scrub_file"
external scrub_freespace : t -> string -> unit = "ocaml_guestfs_scrub_freespace"
external scrub_device : t -> string -> unit = "ocaml_guestfs_scrub_device"
external scrub_file : t -> string -> unit = "ocaml_guestfs_scrub_file"
external scrub_freespace : t -> string -> unit = "ocaml_guestfs_scrub_freespace"