void gst_object_unref (gpointer object);
GST_API
+void gst_clear_object (volatile GstObject **object_ptr);
+#define gst_clear_object(object_ptr) g_clear_pointer ((object_ptr), gst_object_unref)
+
+GST_API
gpointer gst_object_ref_sink (gpointer object);
/* replace object pointer */