/* tracering interface */
+GST_API
GType gst_tracer_factory_get_type (void);
+
+GST_API
GList * gst_tracer_factory_get_list (void);
+GST_API
+GType gst_tracer_factory_get_tracer_type (GstTracerFactory * factory);
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstTracerFactory, gst_object_unref)