Function getSelectedItem

src/OpenLoco/src/Ui/Dropdown.cpp:1082–1093

    }

    std::optional<DropdownItemId> getSelectedItem(int32_t index)
    {
        if (index == -1 && _dropdownUseDefault)
        {
            index = Dropdown::getHighlightedItem();
        }
        if (index >= 0 && static_cast<size_t>(index) < _dropdownIds.size())
        {
            return _dropdownIds[index];
        }
        return std::nullopt;
    }

    std::optional<int> dropdownIndexFromPoint(Ui::Window* window, int x, int y)
    {