    function _setRewardDistributor(MultiRewardDistributor newRewardDistributor) public {
        require(msg.sender == admin, "Unauthorized");
        MultiRewardDistributor oldRewardDistributor = rewardDistributor;
        rewardDistributor = newRewardDistributor;
        emit NewRewardDistributor(oldRewardDistributor, newRewardDistributor);
    }
 function disburseAllRewards() internal adminOnly {
        address[] memory holders = getAllParticipants();
        MToken[] memory mTokens = getAllMarkets();
        claimReward(holders, mTokens, true, true);
 }

 // @audit use the existing claimReward function to disburse the rewards to accounts that had accruals.
