Hadoop::Streaming::Role::Iterator - Role to require has_next and next
andrew grangaard <email@example.com>
Naoya Ito <firstname.lastname@example.org>
This software is copyright (c) 2011 by Naoya Ito <email@example.com>.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.