response.getHeaders().put( HandshakeRequest.SEC_WEBSOCKET_EXTENSIONS, Utils.getStringList(negotiatedExtensions, new Utils.Stringifier<Extension>() { @Override String toString(final Extension extension) {
response.getHeaders().put( HandshakeRequest.SEC_WEBSOCKET_EXTENSIONS, Utils.getStringList(negotiatedExtensions, new Utils.Stringifier<Extension>() { @Override String toString(final Extension extension) {