extern time_t rrd_stats_json(int type, RRDSET *st, BUFFER *wb, long entries_to_show, long group, int group_method, time_t after, time_t before, int only_non_zero);
extern int rrd2format(RRDSET *st, BUFFER *out, BUFFER *dimensions, uint32_t format, long points, long long after, long long before, int group_method, uint32_t options, time_t *latest_timestamp);
extern time_t rrd_stats_json(int type, RRDSET *st, BUFFER *wb, long entries_to_show, long group, int group_method, time_t after, time_t before, int only_non_zero);
extern int rrd2format(RRDSET *st, BUFFER *out, BUFFER *dimensions, uint32_t format, long points, long long after, long long before, int group_method, uint32_t options, time_t *latest_timestamp);