 [Event(name="gridMouseDrag", type="spark.events.GridEvent")]
 
 /**
- *  Dispatched after a GRID_MOUSE_DOWN event when the mouse button is released, even
+ *  Dispatched after a <code>gridMouseDown</code> event 
+ *  when the mouse button is released, even
  *  if the mouse is no longer within the GridColumnHeaderGroup.
  *
  *  @eventType spark.events.GridEvent.GRID_MOUSE_UP

[Event(name="gridMouseDown", type="spark.events.GridEvent")]

/**
 *  Dispatched after a SEPARATOR_MOUSE_DOWN event if the mouse moves before 
 *  the button is released.
 *
 *  @eventType spark.events.GridEvent.SEPARATOR_MOUSE_DRAG
 * 

     *  Specifies the column index of the header renderer currently
     *  being pressed down by the user.
     *  
     *  <p>Setting <code>downColumnIndex</code> to -1 (the default) means 
     *  that the column index is undefined, and the header renderer has 
     *  its <code>down</code> property set to <code>false</code>.</p>
     * 
     *  @default -1
     * 
