Method FindSpareSlot

src/openrct2/object/ObjectManager.cpp:403–419

        }

        std::optional<ObjectEntryIndex> FindSpareSlot(ObjectType objectType)
        {
            auto& list = GetObjectList(objectType);
            auto it = std::find(list.begin(), list.end(), nullptr);
            if (it != list.end())
            {
                return static_cast<ObjectEntryIndex>(std::distance(list.begin(), it));
            }

            auto maxSize = getObjectEntryGroupCount(objectType);
            if (list.size() < static_cast<size_t>(maxSize))
            {
                list.emplace_back();
                return static_cast<ObjectEntryIndex>(list.size() - 1);
            }
            return std::nullopt;
        }

        size_t GetLoadedObjectIndex(const Object* object)
        {