tes and create <code>Column</code> objects accordingly and add them into a <code>ModelColumns</code> object automatically.<br>
                One can explicitly define <code>ModelColumns</code> object in custom listing class, this useful to add or override some columns over the columns deduced from the model.<br>
                Use this syntax in your custom listing class :<br>
                <pre><code class="language-python">{% codelisting %}{% verbatim %}
                from django_listing import *
 