QString array[2][4]
array[i][j] = item(i, j);

    Q_REQUIRED_RESULT static QTypedArrayData *allocate(size_t capacity,
            AllocationOptions options = Default)
    {
        Q_STATIC_ASSERT(sizeof(QTypedArrayData) == sizeof(QArrayData));
        return static_cast<QTypedArrayData *>(QArrayData::allocate(sizeof(T),
                    Q_ALIGNOF(AlignmentDummy), capacity, options));
    }

class AlignmentDummy { QArrayData header; T data; };

{
    auto coro = getCoro();
    Q_UNUSED(coro);
}