ther other parts
of your application have already asked for and loaded it.</p>
<p>One downside to returning a cached record is you may find the state of
the data has changed since it was first loaded into the store's
identity map. In order to prevent this stale data from being a problem
for long, Ember Data will automatically make a request in the
background each time a cached record is returned from the store. When
the new data comes in, the record is updated, and if there have been
changes to the record s