title: Problems with populating an array inside the Backbone model
body: <p>I have the following code:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>handleNewFillupForm: function (parameters) {
     data.fillups.push(parameters);
      ...
  }</code></pre>
  </div>
  </div>
  </p>
  
  <p><em>data</em> is a Bacbone model and <em>fillups</em> an array containing plain JS objects. <em>parameters</em> is such a simple JS object: {key:value, ...}. However, when I check for what has been inserted in <em>fillups</em> array, it's not this object but a fully blown Backbone model. I don't understand why this happens. How can I remedy this?</p>