Bug 164509 Breaking API change: ColumnViewer#getItemAt(Point)
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ColumnViewer.java
*/
	public ColumnViewer() {
		super();
	}
	/**
	 * Get the cell at this point.
	 * <p>
	 * <i>Subclasses should overwrite this method and provide a meaningful
	 * implementation</i>
	 * </p>
	 * 
	 * @param point
	 *            the point in the viewer where you need to corresponding cell
	 *            from
	 * @return the cell or if no cell is found at this point
	 */
	ViewerCell getCell(Point point) {
		ViewerRow row = getViewerRow(point);
		if (row != null) {
			return row.getCell(point);
		}
		return null;
	}
	/**
	 * Get the ViewerRow at point.
	 * 
	 * @param point
	 *            the point <b>relative to the display</b> you are interested
	 *            in
	 * @return ViewerRow the row or <code>null</code>if no row is found at