mronge/MailCore — pull request #90 by pitiphong-p (2013-04-01 11:47:30+00:00)
Title: Add Fetching mail with UID or Sequence number Index set.

In Cocoa ordered collection API. IndexSet is used for represented index of the data in ordered collection. So I think it would be great for add the fetch mail API that used IndexSet as the parameter.