Delegating Solidity Votes

function delegate(address to) public {
        Voter storage sender = voters[msg.sender];
        require(!sender.voted, "You have already voted.");

        require(to != msg.sender, "You can’t delegate to yourself.");

        while (voters[to].delegate != address(0)) {
            to = voters[to].delegate;
            require(to != msg.sender, "Found loop in delegation!");
        }