upgrade_with_proxy.sol

contract DaoBase {
   int x;
   function method1() public {x = x +1; }
}

contract Moneyflow {
  DaoBase daoBase;
}

/// Upgradeability. Approach 1 - split DaoBase into 2 contracts - storage and code (explicit)
contract Storage {
   int x;
}

contract DaoBase {
   Storage storage;
   
   function method1() public {storage.x = storage.x + 1;}
   function upgrade(){
   
   }
}