public function setMatchTableEntries(MatchTableEntryCollection $matchTableEntries)
    {
        if (count($matchTableEntries) > 0) {
            $this->matchTableEntries = $matchTableEntries;
        } else {
            $msg = "A MatchTable object must contain at least one MatchTableEntry object.";
            throw new InvalidArgumentException($msg);
        }
    }