Bug 258736 [Viewers] [JFace] setUseHashLookUp() and multiple occurrences of same domain object in TreeViewer
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewer.java
*            <code>true</code> if the selection is to be made visible,
	 *            and <code>false</code> otherwise
	 */
	public void setSelection(ISelection selection, boolean reveal) {
		super.setSelection(selection, reveal);
	}
	public void editElement(Object element, int column) {
		if( element instanceof TreePath ) {
			try {
				getControl().setRedraw(false);
				setSelection(new TreeSelection((TreePath) element));
				TreeItem[] items = tree.getSelection();
				if( items.length == 1 ) {
					ViewerRow row = getViewerRowFromItem(items[0]);
					if (row != null) {
						ViewerCell cell = row.getCell(column);
						if (cell != null) {
							triggerEditorActivationEvent(new ColumnViewerEditorActivationEvent(cell));
						}
					}
				}
			} finally {
				getControl().setRedraw(true);
			}
		} else {
			super.editElement(element, column);
		}
	}
}