public RequestBuilder Handler(string file, string provider, int fileNumber)
        {
            ObjectAdapter adapter = FileAdapter.Csv(file);
            IEnumerable <ValidationRecordCsv> records = adapter.Records <ValidationRecordCsv>(true);

            if (records.Any(r => !r.IsValid))
            {
                return(new BadRequstBuilder(file, records.Where(r => !r.IsValid)));
            }

            return(new ValidationRequestBuilder(file, records.Where(r => r.IsValid), provider, fileNumber, 10000));
        }