Bug 161425 [Viewers] TableTreeViewer => EditingSupport broken
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TableTreeViewer.java
*/
	protected void addTreeListener(Control c, TreeListener listener) {
		((TableTree) c).addTreeListener(listener);
	}
	/**
	 * Cancels a currently active cell editor. All changes already done in the
	 * cell editor are lost.
	 */
	public void cancelEditing() {
		tableEditorImpl.cancelEditing();
	}
	/*
	 * (non-Javadoc) Method declared on AbstractTreeViewer.
	 */
	protected void doUpdateItem(Item item, Object element) {
		
		
		IBaseLabelProvider prov = getLabelProvider();
		ITableLabelProvider tprov = null;
		if (prov instanceof ITableLabelProvider) {
			tprov = (ITableLabelProvider) prov;
		}
		int columnCount = tableTree.getTable().getColumnCount();
		TableTreeItem ti = (TableTreeItem) item;
		
		
		for (int column = 0; column < columnCount || column == 0; column++) {
			String text = "";
			Image image = null;
			if (tprov != null) {