function claimTokens(address _token) public onlyOwner {
        if (_token == 0x0) {
            owner.transfer(address(this).balance);
            return;
        }

        ERC20 token = ERC20(_token);
        uint balance = token.balanceOf(this);
        token.transfer(owner, balance);

        emit ClaimedTokens(_token, owner, balance);
    }