 import spark.events.GridSelectionEvent;
 import spark.events.GridSelectionEventKind;
 
-
 use namespace mx_internal;
 
 //--------------------------------------

        if (setGridProperty("showDataTips", value))
            dispatchChangeEvent("showDataTipsChanged");
    }    
    
    //----------------------------------
    //  typicalItem delegates to (delegates to grid.typicalItem)

            if (grid)
                columnHeaderBar.dataGrid = this;
            
            columnHeaderBar.addEventListener(GridEvent.GRID_CLICK, columnHeaderBar_clickHandler);
            columnHeaderBar.addEventListener(GridEvent.SEPARATOR_ROLL_OVER, separator_rollOverHandler);
            columnHeaderBar.addEventListener(GridEvent.SEPARATOR_ROLL_OUT, separator_rollOutHandler);
            columnHeaderBar.addEventListener(GridEvent.SEPARATOR_MOUSE_DOWN, separator_mouseDownHandler);
