      *  this column.
 
      *  If this property is null, and the column grid's owner is a DataGrid, 
-     *  then the value of the DataGrid's itemEditor property is used.   The
-     *  default DataGrid item editor is TextGridItemEditor.
+     *  then the value of the DataGrid's itemEditor property is used.   If no
+     *  item editor is specified then TextGridItemEditor is used.
      * 
      *  @default null
      *

     */
    private function get dataGrid():spark.components.DataGrid
    {
        return (grid) ? grid.gridOwner as DataGrid : null;
    }
    
    //----------------------------------

     */
    public function get headerRenderer():IFactory
    {
        return _headerRenderer;
    }
    
    /**
