Finishes an asynchronous pixbuf save operation started with gdkpixbuf.pixbuf.Pixbuf.saveToStreamAsync.
a gio.async_result.AsyncResult
TRUE if the pixbuf was saved successfully, FALSE if an error was set.
Finishes an asynchronous pixbuf save operation started with gdkpixbuf.pixbuf.Pixbuf.saveToStreamAsync.