What are the differences between Restoration ID and identifier to a UITableViewCell that set in storyboard
<p>When I drag a <code>UITableViewCell</code> to a tableView in <code>storyboard</code>, I find there are two ID to be set in the inspector. One is in the Identity Inspector(<code>Restoration ID</code>) and the other is in Attributes Inspector(identity). </p>

<p>What's the difference between them?</p>