SimpleUint.sol

import './Upgradeable.sol';


contract SimpleUint is Upgradeable {
    uint public value;
    string public name = "SimpleUint";
    
    function setValue(uint _value) public {
        value = _value;
    }
    
    
    function initialize() public {
        if(initializeUpgradeable(target)) {
            name = "SimpleUint";
        }
    }
    
}

contract SimpleUintV2 is SimpleUint {
    function setValue(uint _value) public {
        value = 20*_value;
    }
}

contract SimpleUintV3 is SimpleUintV2 {
    bool isLondonFun;
    function londonIsFun() public {
        isLondonFun = true;
    }
}

contract SimpleUintV4 is SimpleUintV3 {
    bool public isLondonFun2;
    function londonIsFun() public {
        isLondonFun2 = true;
    }
}