#define Guestfs_val(v) (*((guestfs_h **)Data_custom_val(v)))
extern void ocaml_guestfs_raise_error (guestfs_h *g, const char *func)
Noreturn;
#define Guestfs_val(v) (*((guestfs_h **)Data_custom_val(v)))
extern void ocaml_guestfs_raise_error (guestfs_h *g, const char *func)
Noreturn;