function initCrowdsaleProlongationVoting() public onlyOwner {
        require(now >= endDate + SKIP_TIME && now <= endDate + 12 hours);
        require(soldTokens >= SOFTCAP * 75 / 100);
        require(soldTokens <= HARDCAP * 90 / 100);
        voting.initProlongationVoting();
        votingApplied = false;
        additionalTime = 2 days;
        votingType = VotingType.Prolongation;
    }