AuthenticatedNetworkContainer

Clear any cached token on the http clients. This will trigger a reloading of the access token from the session manager on the next request.

Cancel and join all caller requests/collectors before closing. Injected mock engines remain caller-owned.

Close open WebSockets and wait until their clients finish; HTTP requests and later WebSockets still work. The engine may finish closing the native socket afterwards. Stop collectors first, or they may reconnect.

Fail HTTP requests to the backend, in flight and new, as having no network until block returns. WebSockets are not affected. Use it to end requests that would hold an account handoff.