'Attempt an anonymous login on the given remote root object.
@type root: L{RemoteReference}
@param root: The object on which to attempt the login, most likely
returned by a call to L{PBClientFactory.getRootObject}.
@param client: A jellyable object which will be used as the I{mind}
parameter for the login attempt.
@rtype: L{Deferred}
@return: A L{Deferred} which will be called back with a
L{RemoteReference} to an avatar when anonymous login succeeds, or
which will errback if anonymous login fails.'

def _cbLoginAnonymous(self, root, client):

    return root.callRemote('loginAnonymous', client)
