return Class.forName("org.eclipse.jface.text.DocumentUndoManager$" + className, true, getClass().getClassLoader());
return Class.forName("org.eclipse.text.undo.DocumentUndoManager$" + className, true, getClass().getClassLoader());
	private Class getDocumentUndoManagersInnerClass(String className) {		try {			return Class.forName("org.eclipse.jface.text.DocumentUndoManager$" + className, true, getClass().getClassLoader());		} catch (ClassNotFoundException e) {			fail();			return null;		}	}