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
* Returns the style ranges to be applied on the text label or <code>null</code> if no
	 * style ranges have been set.
	 * 
	 * @return styleRanges the styled ranges
	 * 
	 * @since 3.4
	 */
	public StyleRange[] getStyleRanges() {
		return (StyleRange[]) getItem().getData(KEY_TEXT_LAYOUT + columnIndex);
	}
	/**
	 * Set the columnIndex.
	 *
	 * @param column
	 */
	void setColumn(int column) {
		columnIndex = column;
	}
	/**
	 * Set the row to rowItem and the columnIndex to column.
	 *
	 * @param rowItem
	 * @param column
	 */
	void update(ViewerRow rowItem, int column, Object element) {
		row = rowItem;
		columnIndex = column;
		this.element = element;
	}
	/**