I would like to remove the sorting arrow from a header of a CellTable. (the one in the red circle below, which is from the GWT showcase : <http://gwt.google.com/samples/Showcase/Showcase.html#!CwCellTable>)

![arrow celltable](https://i.stack.imgur.com/lSdfk.png)

But I still want the sorting capabilities of the CellTable.

Is it possible? Any idea?