gistfile1.txt

type GameObject
{
  int a;
  int b;
  int c;
}

type GameObjectWithCheats > GameObject
{
  int d;
}

if(cheats)
{
  injector.map(GameObjectWithCheats, GameObject);
}
else
{
  injector.map(GameObject, GameObject);
}

//Inside game

GameObject object = injector.getObject(GameObject);
object.a = 5;