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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
* Retrieve the content item associated with the specified row.
Element? getItemAtIndex(long row);
* Retrieve the index associated with the specified content item.
long getIndexOfItem(Element? item);
TreeContentView includes TreeView;