extern void guestfs_set_out_of_memory_handler (guestfs_h *g, guestfs_abort_cb);
extern guestfs_abort_cb guestfs_get_out_of_memory_handler (guestfs_h *g);
extern void guestfs_set_out_of_memory_handler (guestfs_h *g, guestfs_abort_cb);
extern guestfs_abort_cb guestfs_get_out_of_memory_handler (guestfs_h *g);