Not a pattern just a utility class to support UI functionality. There is a test for it and it will better explain what it does. I will put javadoc if that's needed. 

----- Original Message -----

> From: "Sean Flanigan" <notifications@github.com>
> To: "zanata/zanata-server" <zanata-server@noreply.github.com>
> Cc: "Patrick Huang" <pahuang@redhat.com>
> Sent: Thursday, July 18, 2013 10:14:52 AM
> Subject: Re: [zanata-server] New translation history UI (#54)

> In
> zanata-war/src/main/java/org/zanata/webtrans/client/presenter/ComparingPair.java:
> > + * details.
> > + *
> > + * You should have received a copy of the GNU Lesser General Public
> > License
> > + * along with this software; if not, write to the Free Software
> > Foundation,
> > + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA, or see
> > the FSF
> > + * site: http://www.fsf.org.
> > + */
> > +
> > +package org.zanata.webtrans.client.presenter;
> > +
> > +import org.zanata.webtrans.shared.model.TransHistoryItem;
> > +
> > +/**
> > +* @author Patrick Huang <a
> > href="mailto:pahuang@redhat.com">pahuang@redhat.com</a>
> > +*/
> > +class ComparingPair

> This class needs JavaDoc. Is this implementing a pattern I haven't heard of?

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