ProtocolsConfigurator.seenProtocols.set(null);
try (BlockheadClient client = new BlockheadClient(uri))
{
client.addHeader("Sec-WebSocket-Protocol: echo, chat, status\r\n");
client.connect();
client.sendStandardRequest();
client.expectUpgradeResponse();
client.write(new TextFrame().setPayload("getProtocols"));
EventQueue<WebSocketFrame> frames = client.readFrames(1,1,TimeUnit.SECONDS);