title: Error - "Class is unavailable : Cannot find Swift declaration for this class", while building app on iPhone 4s (iOS 9.3)
body: <p>My App has been created under iOS 10.2, and when I'm trying to create a build of the app to run on iPhone 4s (iOS 9.3). </p>
  
  <p>I'm using two frameworks :-</p>
  
  <p><strong>ViewModelExtensions.framework</strong> (github.com/jozsef-vesza/ExpandingTableView/tree/master/ExpandingTest/Carthage/Checkouts/ViewModelExtensions/ViewModelExtensions)</p>
  
  <p><strong>ExpandingTableView.framework</strong> (github.com/jozsef-vesza/ExpandingTableView) in my project.</p>
  
  <p>I'm not able to create a built for my project.  Its giving me 3 main errors as follows :-</p>
  
  <ol>
  <li><p><code>ExpandingTableViewController</code> is unavailable: cannot find Swift declaration for this class</p></li>
  <li><p><code>ExpandingTableViewCell</code> is unavailable: an not find Swift declaration for this class</p></li>
  <li><p>Use of undeclared type <code>ViewModelType</code></p></li>
  </ol>
  
  <p><strong>The thing is its perfectly running on all simulators supporting iOS 10.2. What shall I do ?</strong></p>
  
  <p>Here is the screenshot.<a href="https://i.stack.imgur.com/9hAno.png" rel="nofollow noreferrer">Screenshot</a></p>
  
  <p>My Code - <a href="https://drive.google.com/file/d/0BzolC8EgXkB1dU1PZ2hURXo4VnM/view?usp=sharing" rel="nofollow noreferrer">Project</a></p>