function unlockSecondPrivate() public 
        locked 
        onlyOwner
        {
        require(block.timestamp >= secondPrivateReleaseTime);
        require(secondPrivateLockedAmount > 0);

        uint256 amount = token.balanceOf(this);
        require(amount >= secondPrivateLockedAmount);

        token.transfer(privateLockAddress, secondPrivateLockedAmount);
        secondPrivateLockedAmount = 0;
    }