-struct graph_ident_s;
-typedef struct graph_ident_s graph_ident_t;
-
-struct graph_instance_s;
-typedef struct graph_instance_s graph_instance_t;
-
-struct graph_config_s;
-typedef struct graph_config_s graph_config_t;
-
-/*
- * Callback types
- */
-typedef int (*gl_cfg_callback) (graph_config_t *cfg,
- void *user_data);
-
-typedef int (*gl_inst_callback) (graph_config_t *cfg,
- graph_instance_t *inst, void *user_data);