int graph_compare (graph_config_t *cfg, const graph_ident_t *ident);
+size_t graph_num_instances (graph_config_t *cfg);
+
+int graph_sort_instances (graph_config_t *cfg);
+
int graph_clear_instances (graph_config_t *cfg);
int graph_get_rrdargs (graph_config_t *cfg, graph_instance_t *inst,