public IAsyncEnumerable <string> GetJsonSkinsByIds(
        IReadOnlyCollection <int> itemIds,
        IProgress <ICollectionContext>?progress = default,
        CancellationToken cancellationToken     = default
        )
    {
        var producer = SplitQuery.Create <int, string>(
            async(range, ct) =>
        {
            var request = new BulkRequest("/v2/skins")
            {
                Ids = range
            };
            var json = await request.SendAsync(http, ct);
            return(json.Indent(false)
                   .RootElement.EnumerateArray()
                   .Select(
                       item => item.ToString()
                       ?? throw new InvalidOperationException("Unexpected null in JSON array.")
                       )
                   .ToList());
        },
            progress
            );

        return(producer.QueryAsync(itemIds, cancellationToken: cancellationToken));
    }
    public async Task <List <string> > GetAllJsonFloors(int continentId)
    {
        var request = new BulkRequest($"/v2/continents/{continentId}/floors");
        var json    = await request.SendAsync(http, CancellationToken.None).ConfigureAwait(false);

        return(json.Indent(false)
               .RootElement.EnumerateArray()
               .Select(
                   item => item.ToString()
                   ?? throw new InvalidOperationException("Unexpected null in JSON array.")
                   )
               .ToList());
    }