title: How to sort column with null values using display table tag
body: <p>I have list of string values in which some contain null values while sorting these values through display:tag,<br>
  I have to first display  those  values  which not contain null values in ascending order and after that
  i have to show null values .
  Currently i am using following code :</p>
  
  <pre><code>&lt;display:column title="Name" property="sName" sortable="true"&gt;&lt;/display:column&gt;
  </code></pre>