      */
        selectedModel: null,

        /**
         * In single selection, this returns the selected index.
         * Note that you should not use this to set the selection. Instead use
         * `selected`.
         *
         * @attribute selectedIndex
         * @type number
         * @default -1
         */
        selectedIndex: -1,

        /**
         * Nodes with local name that are in the list will not be included
         * in the selection items.
         *
         * @attribute exclu