'Check if `hmac\' is present in the replay table.
Return `True\' if the given `hmac\' is present in the replay table and
`False\' otherwise.'

def isReplayed(self, hmac):

    assert (self.replayTracker is not None)
    log.debug('Querying    if    HMAC    is    present    in    the    replay    table.')
    return self.replayTracker.isPresent(hmac)
