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/ViewerCell.java
* Return the item for the receiver.
	 *
	 * @return {@link Item}
	 */
	public Widget getItem() {
		return row.getItem();
	}
	/**
	 * Get the control for this cell.
	 *
	 * @return {@link Control}
	 */
	public Control getControl() {
		return row.getControl();
	}
	/**
	 * Get the current index. This can be different from the original index when
	 * columns are reordered
	 *
	 * @return the current index (as shown in the UI)
	 * @since 3.4
	 */
	public int getVisualIndex() {
		return row.getVisualIndex(getColumnIndex());
	}
	/**
	 * Returns the specified neighbor of this cell, or <code>null</code> if no
	 * neighbor exists in the given direction. Direction constants can be
	 * combined by bitwise OR; for example, this method will return the cell to
	 * the upper-left of the current cell by passing {@link #ABOVE} |