     }
 
     /**
-     *  Setup an item renderer for a column and put it in the listItems array
-     *  at the requested position
-     *  @param c The DataGridColumn for the renderer
-     *  @param contentHolder The set of rows (locked rows, regular rows)
-     *  @param rowNum The row number
-     *  @param colNum The column number
-     *  @param data The data for the row
-     *  @param uid The uid for the data
-     *  @return The renderer for this column and row
+     *  Sets up an item renderer for a column and put it in the listItems array
+     *  at the requested position.
+     *  
+     *  @param c The DataGridColumn for the renderer.
+     *  @param contentHolder The set of rows (locked rows, regular rows).
+     *  @param rowNum The row number.
+     *  @param colNum The column number.
+     *  @param data The data for the row.
+     *  @param uid The uid for the data.
+     *  
+     *  @return The renderer for this column and row.
      */
     protected function setupColumnItemRenderer(c:DataGridColumn, contentHolder:ListBaseContentHolder,
                     rowNum:int, colNum:int, data:Object, uid:String):IListItemRenderer

    }

    /** 
     *  Adjust size and positions of the renderers for the given rowNum, row position and height
     *  @param contentHolder The set of rows (locked rows, regular rows)
     *  @param rowNum The row number
     *  @param yy The y position of the row
     *  @param hh The height of the row
     */
    protected function adjustRow(contentHolder:ListBaseContentHolder, rowNum:int, yy:Number, hh:Number):void
    {

    
    /**
     *  Moves the selection in a vertical direction in response
     *  to the user selecting items with the up arrow or down arrow
     *  keys and modifiers such as the Shift and Ctrl keys. This method
     *  might change the <code>horizontalScrollPosition</code>, 
     *  <code>verticalScrollPosition</code>, and <code>caretIndex</code>
     *  properties, and call the <code>finishKeySelection()</code>method
     *  to update the selection.
     *
     *  @param code The key that was pressed (for example, <code>Keyboard.DOWN</code>).
     *  
     *  @param shiftKey <code>true</code> if the Shift key was held down when
     *  the keyboard key was pressed.
     *  
     *  @param ctrlKey <code>true</code> if the Ctrl key was held down when
     *  the keyboard key was pressed
     */
    override protected function moveSelectionVertically(code:uint, shiftKey:Boolean,
