set small(x)
    {
        this._small = x;

        if (this._listItemNode) {
            if (this._small)
                this._listItemNode.addStyleClass("small");
            else
                this._listItemNode.removeStyleClass("small");
        }
    }
@constructor
@extends {TreeElement}
@param {string=} subtitle
@param {Object=} representedObject
@param {boolean=} hasChildren