<zk>
    <div width="300px" vflex="min">
        <tree id="tree" hflex="1" vflex="min">
            <treecols sizable="true">
                <treecol hflex="min" label="Name" />
            </treecols>
            <treechildren>
                <treeitem>
                    <treerow>
                        <treecell
                            label="Item with very long labels - 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789" />
                    </treerow>
                    <treechildren>
                        <treeitem>
                            <treerow>
                                <treecell label="Item 2.1" />
                            </treerow>
                            <treechildren>
                                <treeitem>
                                    <treerow>
                                        <treecell label="Item 2.1.1" />
                                    </treerow>
                                </treeitem>
                                <treeitem>
                                    <treerow>
                                        <treecell label="Item 2.1.2" />
                                    </treerow>
                                </treeitem>
                            </treechildren>
                        </treeitem>
                        <treeitem id="apa">
                            <treerow>
                                <treecell label="Item 2.2" />
                            </treerow>
                            <treechildren>
                                <treeitem>
                                    <treerow>
                                        <treecell label="Item 2.2.1" />
                                    </treerow>
                                </treeitem>
                            </treechildren>
                        </treeitem>
                    </treechildren>
                </treeitem>
                <treeitem label="Item 3" />
            </treechildren>
        </tree>
    </div>
    <button
        onClick="Clients.scrollIntoView(apa)"
        label="Push me" />
</zk>