public void Capture(List <Customer> customers, string fileName, int batchSize)
{
var uniqueEntries = _dataCleaner.RemoveDuplicates(customers);
for (var i = 0; i < uniqueEntries.Count; i++)
{
var fileNumber = (i / batchSize) + 1;
_csvWriter.Save($"{fileName}.{fileNumber}", _serialiser.SerialiseCustomer(customers[i]));
}
}