openzeppelin-contracts/docs/modules/api/examples/governance/MyToken.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;

import "@openzeppelin/contracts/../token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/../token/ERC20/extensions/ERC20Permit.sol";
import "@openzeppelin/contracts/../token/ERC20/extensions/ERC20Votes.sol";

contract MyToken is ERC20, ERC20Permit, ERC20Votes {
    constructor() ERC20("MyToken", "MTK") ERC20Permit("MyToken") {}

    // The functions below are overrides required by Solidity.

    function _afterTokenTransfer(address from, address to, uint256 amount) internal override(ERC20, ERC20Votes) {
        super._afterTokenTransfer(from, to, amount);
    }

    function _mint(address to, uint256 amount) internal override(ERC20, ERC20Votes) {
        super._mint(to, amount);
    }

    function _burn(address account, uint256 amount) internal override(ERC20, ERC20Votes) {
        super._burn(account, amount);
    }
}