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
* {@link #LEFT}. If <code>sameLevel</code> is <code>true</code>, only
	 * cells in sibling rows (under the same parent) will be considered.
	 *
	 * @param directionMask
	 *            the direction mask used to identify the requested neighbor
	 *            cell
	 * @param sameLevel
	 *            if <code>true</code>, only consider cells from sibling rows
	 * @return the requested neighbor cell, or <code>null</code> if not found
	 */
	public ViewerCell getNeighbor(int directionMask, boolean sameLevel) {
		ViewerRow row;
		if ((directionMask & ABOVE) == ABOVE) {
			row = this.row.getNeighbor(ViewerRow.ABOVE, sameLevel);
		} else if ((directionMask & BELOW) == BELOW) {
			row = this.row.getNeighbor(ViewerRow.BELOW, sameLevel);
		} else {
			row = this.row;
		}
		if (row != null) {
			int columnIndex;
			columnIndex = getVisualIndex();
			int modifier = 0;
			if ((directionMask & LEFT) == LEFT) {
				modifier = -1;
			} else if ((directionMask & RIGHT) == RIGHT) {
				modifier = 1;
			}
			columnIndex += modifier;
			if (columnIndex >= 0 && columnIndex < row.getColumnCount()) {