title: Unload all records of a specific type from the store
body: <p>I am trying to do the following:</p>
  
  <pre><code>App.Availablephone.all().forEach(function(phone, index) {
      phone.unloadRecord();
  });
  </code></pre>
  
  <p>Unfortunately, since <code>.all()</code> is a live array, this is not working (the array is being modified during the loop, and gets completely mixed up).</p>
  
  <p>How can I unload all records of a specific type from the store?</p>