for k,v in pairs(WebSocket) do print("WS",k,type(v)) end
local ok,ws=pcall(WebSocket.connect,"wss://echo.websocket.events")
print("connect",ok,ws)
if ws then
  local mt=getmetatable(ws); print("mt",mt)
  for _,k in ipairs({"Send","Receive","Close","OnMessage","OnMessageEvent","MessageReceived","OnClose","OnOpen","OnError"}) do
    local okv,v=pcall(function() return ws[k] end)
    print("field",k,okv,type(v),tostring(v))
  end
  pcall(function() ws:Close() end)
end