Add a way to enums all extra data members
GObject has member methods to add or remove attachment data, but there is no way to enum them all, pls add a way to enum them all to do something:
gpointer g_object_get_data (GObject* object, const gchar* key);
void g_object_set_data (GObject* object, const gchar* key, gpointer data);
// Maybe the new method like this:
GList g_object_get_data_members(GObject* object);
Edited by TAO ZUHONG