void format_odp_action(struct ds *, const struct nlattr *);
void format_odp_actions(struct ds *, const struct nlattr *odp_actions,
size_t actions_len);
-void format_odp_flow_stats(struct ds *, const struct odp_flow_stats *);
/* By my calculations currently the longest valid nlattr-formatted flow key is
* 80 bytes long, so this leaves some safety margin.