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
* Gets the background color of the cell.
	 * 
	 * @return the background of the cell or <code>null</code> for the default background
	 * 
	 * @since 3.4
	 */
	public Color getBackground() {
		return row.getBackground(columnIndex);
	}
	
	/**
	 * Gets the font of the cell.
	 * 
	 * @return the font of the cell or <code>null</code> for the default font
	 * 
	 * @since 3.4
	 */
	public Font getFont() {
		return row.getFont(columnIndex);
	}
	
	/*
	 * (non-Javadoc)
	 *
	 * @see java.lang.Object#hashCode()
	 */
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + columnIndex;