Bug 161425 [Viewers] TableTreeViewer => EditingSupport broken
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TableTreeViewer.java
/**
	 * Internal table viewer implementation.
	 */
	private TableTreeEditorImpl tableEditorImpl;
	/**
	 * This viewer's table tree control.
	 */
	private TableTree tableTree;
	/**
	 * This viewer's table tree editor.
	 */
	private TableTreeEditor tableTreeEditor;
	/**
	 * Copied from originial TableEditorImpl and moved here since refactoring
	 * completly wiped out the original impl in 3.3
	 * 
	 * @since 3.1
	 */
	class TableTreeEditorImpl {