What is event after reconfigure grid column finish?

I have tried to create grid with dynamic column by following example code:

Code:

           
           if (grid.lockedGrid)
            {
                grid.lockedGrid.headerCt.removeAll(true);
                grid.reconfigureLockable(grid.store, columns);
            }
            else
            {
                grid.headerCt.removeAll(true);
                grid.reconfigure(grid.store, columns);
            }
            grid.getView().refresh();
            grid.doLayout();

Above can work fine.

However, I would like to add some styles to each cell after the all columns are rendered.

How do I know when all columns are rendered completely after reconfigure grid column?

Is there any event after reconfigure?

Thank in advance.

earist.