extern void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb);
extern void rrd_stats_api_v1_charts(RRDHOST *host, BUFFER *wb);
extern void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb);
extern void rrd_stats_api_v1_charts(RRDHOST *host, BUFFER *wb);
extern void rrd_stats_api_v1_charts_allmetrics_shell(RRDHOST *host, BUFFER *wb);
extern void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER *wb);
extern void rrd_stats_api_v1_charts_allmetrics_shell(RRDHOST *host, BUFFER *wb);
extern void rrd_stats_api_v1_charts_allmetrics_prometheus(RRDHOST *host, BUFFER *wb);