code: func PixbufLoaderNew() (*PixbufLoader, error) {
  	c := C.gdk_pixbuf_loader_new()
  	if c == nil {
  		return nil, nilPtrErr
  	}
  
  	obj := &glib.Object{glib.ToGObject(unsafe.Pointer(c))}
  	p := &PixbufLoader{obj}
  	obj.Ref()
  	runtime.SetFinalizer(p, func(_ interface{}) { obj.Unref() })
  	return p, nil
  }
docs: // PixbufLoaderNew() is a wrapper around gdk_pixbuf_loader_new().