Method update

src/data/Tree.ts:380–391

* Update item available by list, * when list has been performed options like 'filterSelf' or 'map'.

()

     * when list has been performed options like 'filterSelf' or 'map'.
     */
    update() {
        const data = this.data;
        const nodes = this._nodes;

        for (let i = 0, len = nodes.length; i < len; i++) {
            nodes[i].dataIndex = -1;
        }

        for (let i = 0, len = data.count(); i < len; i++) {
            nodes[data.getRawIndex(i)].dataIndex = i;
        }
    }

    /**
     * Clear all layouts