public Class<?> getColumnClass(int column) {
            switch(column) {
            case NATION_COLUMN:
                return Nation.class;
            case AVAILABILITY_COLUMN:
                return NationOptions.NationState.class;
            case ADVANTAGE_COLUMN:
                return NationType.class;
            case COLOR_COLUMN:
                return Color.class;
            case PLAYER_COLUMN:
                return Player.class;
            }
            return String.class;
        }