There's something that I'm trying to do that D may or may not be
capable of.
In the Map class, there is a 2-dimensional array called `grid`,
where the Tile objects are stored. The Mission class inherits the
Map class.
In the Mission class, I want the `grid` array to instead be
composed of a derivative of the Tile class. I tried making a
derived class called `GridTile` which contains the additional
property specific to the Raylib front-end.
I tried doing this, but it won't let me override `grid`, even if
I change it from `private` to `protected` in the Map class.
Is there a way I can do this, without this additional
functionality being put in the base Tile class?
