struct simap_node *simap_find(const struct simap *, const char *);
struct simap_node *simap_find_len(const struct simap *,
const char *, size_t len);
struct simap_node *simap_find(const struct simap *, const char *);
struct simap_node *simap_find_len(const struct simap *,
const char *, size_t len);