Bug 224428 [Viewers] Add set/getStyleRanges to ViewerRow
20080327 set/getStyleRenges are on ViewerCell, using the data element on the row to store the ranges. They use a private constant as key. As an implementor of a ViewerRow, you want to get access to the styled ranges. ViewerCell is not implementable. The correct way therefor would be to also add set/getStyleRenges to ViewerRow where implementors can use it or even override it (if their widget supports styled ranges)
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerRow.java
* Get the font at the columnIndex.
	 * 
	 * @param columnIndex
	 * @return {@link Font} or <code>null</code>
	 */
	public abstract Font getFont(int columnIndex);
	/**
	 * Set the {@link Font} at the columnIndex.
	 * 
	 * @param columnIndex
	 * @param font
	 */
	public abstract void setFont(int columnIndex, Font font);
	/**
	 * Get the ViewerCell at point.
	 * 
	 * @param point
	 * @return {@link ViewerCell}
	 */
	public ViewerCell getCell(Point point) {
		int index = getColumnIndex(point);
		return getCell(index);
	}
	/**
	 * Get the columnIndex of the point.
	 * 
	 * @param point
	 * @return int or -1 if it cannot be found.
	 */
	public int getColumnIndex(Point point) {