Objects::Collection::HashUnion - Union hashes.
use Objects::Collection::HashUnion; tie %hashu, 'Objects::Collection::HashUnion', \%hash1, \%hash2;
Handle collections key _changed
Zahatski Aliaksandr, <zag@cpan.org>
Copyright (C) 2005-2006 by Zahatski Aliaksandr
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.
