<list-property name="sort">
                <structure>
                    <expression name="key" type="javascript">row[ params["defaultSortingColumn"] != null &amp;&amp; params["defaultSortingColumn"] != "" ?  params["defaultSortingColumn"].value : 0]</expression>
                    <property name="direction">desc</property>
                    <property name="strength">0</property>
                </structure>
            </list-property>