[Xlightweb-develop] How does the underlying NonBlockingConnection created when I use "httpClient.openWebSocketConnection" to create connection

[HU,nan xa.V. <na...@xa...>]

I am reading the source code , and I am blocked on step 5:
  step 1 : httpClient.openWebSocketConnection
  step 2 : performHandshake
  step 3 : HttpUtils.getConnectionFromAttribute(response.getResponseHeader())
  step 4 : header.getAttribute("org.xlightweb.client.connection")
  step 5 : when does HttpClientConnection object created and setted with key "org.xlightweb.client.connection"