title: get column index of hide column in extjs grid panel
body: <p>I need to get column index of hide column in <code>extjs grid</code> panel </p>
  
  <pre><code>columnhide: function() {
              var cell = this.getEl().query('.x-grid-cell-inner');
  
              for(var i = 0; i &lt; cell.length; i++) {
              if (i%2 != 0){  // Instead of this i, want to change the style to none for the  hide column, so i need to get the column index of hide column in grid panel
                      cell[i].style.display= "none";
                  }
              }
  </code></pre>