if (!_updates.validate(scene.getVersion())) {
log.warning("Provided with invalid updates; flushing [where=" + where() +
", sceneId=" + scene.getId() + ", version=" + scene.getVersion() + "].");
// clear out the update list as it will not allow us to bring clients up to date with
// our current scene version; instead they'll have to download the whole thing
_updates = new UpdateList();
}
// let derived classes react to the receipt of scene data
gotSceneData(extras);
}