interface CompatibleERC20 {
    // Modified to not return boolean
    function transfer(address to, uint256 value) external;
    function transferFrom(address from, address to, uint256 value) external;
    function approve(address spender, uint256 value) external;

    // Not modifier
    function totalSupply() external view returns (uint256);
    function balanceOf(address who) external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}
/// @notice ERC20 interface which doesn't specify the return type for transfer,
/// transferFrom and approve.
function totalSupply() external view returns (uint256);
// Not modifier