ReadonlyconnectionReadonlycontrollerReadonlycontrollerReadonlyrequestReadonlytypeEither returns the cached value for the given token or initializes and caches a new value.
The token to get the value of.
Either the cached or a new value.
Whether or not a value for the given token has been cached.
The token to check.
True if a value has been cached, false otherwise.
The context of an incoming websocket request.