}
protected void addExtension() {
// should be the first ext to load
getExtensionLoader().addExtension(new ExtensionOption());
getExtensionLoader().addExtension(new ExtensionEdit());
getExtensionLoader().addExtension(new ExtensionFilter());
getExtensionLoader().addExtension(new ExtensionPatternSearch());
getExtensionLoader().addExtension(new ExtensionState());