graph_def_t *def_search (graph_def_t *head, graph_ident_t *ident);
int def_get_rrdargs (graph_def_t *def, graph_ident_t *ident,
graph_def_t *def_search (graph_def_t *head, graph_ident_t *ident);
int def_get_rrdargs (graph_def_t *def, graph_ident_t *ident,