typedef struct bt_self_component_sink bt_self_component_sink;
typedef struct bt_self_component_source bt_self_component_source;
typedef struct bt_self_message_iterator bt_self_message_iterator;
+typedef struct bt_self_plugin bt_self_plugin;
typedef struct bt_self_port bt_self_port;
typedef struct bt_self_port_input bt_self_port_input;
typedef struct bt_self_port_output bt_self_port_output;