key_table
RB_HEAD(key_tables, key_table);
struct key_binding **sort_get_key_bindings_table(struct key_table *,
struct key_table *key_bindings_next_table(struct key_table *);
void key_bindings_unref_table(struct key_table *);
struct key_binding *key_bindings_get(struct key_table *, key_code);
struct key_binding *key_bindings_get_default(struct key_table *, key_code);
struct key_binding *key_bindings_first(struct key_table *);
struct key_binding *key_bindings_next(struct key_table *, struct key_binding *);