typedef struct bt_component_class_sink bt_component_class_sink;
typedef struct bt_component_class_source bt_component_class_source;
typedef struct bt_component_filter bt_component_filter;
typedef struct bt_component_class_sink bt_component_class_sink;
typedef struct bt_component_class_source bt_component_class_source;
typedef struct bt_component_filter bt_component_filter;