title: Get the data of a filtered datasource
body: <p>I'm applying a filter on a datasource and I want to retrieve all the filtered data from this datasource.</p>
  
  <p>The filter is correctly apply, my DropDownList is displaying only the filtered item, but when I want to get the data with Javascript, i'm retreiving every data and not only the filtered one.</p>
  
  <p>Here is some code :</p>
  
  <pre><code>dropdownProduct.dataSource.query({ filter: filter }); 
  
  var data = dropdownProduct.dataSource.data();
  </code></pre>
  
  <p>In the data variable I have all the data. Like I said, the query is working because my dropdown is only displaying the filtered data.</p>
  
  <p>What can I do to only have the filtered data in the data variable?</p>