docs: @SuppressWarnings("ConstantConditions")
      public synchronized void add(Interactable interactable) {
          TerminalPosition topLeft = interactable.toBasePane(TerminalPosition.TOP_LEFT_CORNER);
          TerminalSize size = interactable.getSize();
          interactables.add(interactable);
          int index = interactables.size() - 1;
          for(int y = topLeft.getRow(); y < topLeft.getRow() + size.getRows(); y++) {
              for(int x = topLeft.getColumn(); x < topLeft.getColumn() + size.getColumns(); x++) {
                  //Make sure it's not outside the map
                  if(y >= 0 && y < lookupMap.length &&
                          x >= 0 && x < lookupMap[y].length) {
                      lookupMap[y][x] = index;
                  }
              }
          }
      }