title: Get a Backbone Model instance's model/class name
body: <p>Given an instance of Backbone model, how can I know the "class" (so to speak) of this instance ?</p>
  
  <p>For instance:</p>
  
  <pre><code>class Car extends Backbone.Model
  
  mycar = new Car()
  </code></pre>
  
  <p>And what I need is:</p>
  
  <pre><code>mycar.modelName # =&gt; 'Car'
  </code></pre>