omatically created when a
        QuerySet or a model is provided</li>
        <li>Columns are class-bases and one can create custom ones</li>
        <li>Columns manage One-to-many, Many-to-many and foreign relations</li>
        <li>Provides aggregation columns : sum, avg, min, max values</li>
        <li>Provides page-level and global aggregation : sum, avg, min, max values displayed at listing last row</li>
        <li>Provides columns to make a link to the object, a custom link, checkbox, select box, t