var users = new[]
            {
                new { name = "Juan", age = 25 },
                new { name = "Juan", age = 25 },
                new { name = "David", age = 12 },
                new { name = "Juan", age = 25 },
                new { name = "Juan", age = 4 },
                new { name = "Pedro", age = 2 },
                new { name = "Juan", age = 25 }
            }.ToList();

IQueryable query;
string results;

// This works
query = users.AsQueryable();
query = query.GroupBy(CustomParsingConfig.ParsingConfig, "new(name as name)", "it");
query = query.Select("new (it.Key as Key, new(it.Sum(x => x.age) as ageSum) as nativeAggregates, it as Grouping)");
results = JsonConvert.SerializeObject(query);

// This does not
query = users.AsQueryable();
query = query.GroupBy(CustomParsingConfig.ParsingConfig, "new(name as name)", "it");
query = query.Select("new (it.Key as Key, new(it.Sum(x => x.age) as ageSum, it.Sum(x => x.age) as ageSum2) as nativeAggregates, it as Grouping)");
results = JsonConvert.SerializeObject(query);