<zk>
    <zscript><![CDATA[
    List items = Collections.nCopies(50000, "test");
    ]]></zscript>
    <tree mold="paging" pageSize="2">
        <treecols>
            <treecol label="Column 1" />
            <treecol label="Column 2" />
        </treecols>
        <treechildren>
            <treeitem forEach="${items}">
                <treerow>
                    <treecell label="${forEachStatus.index}"/>
                    <treecell>
                        <button label="Simulate content changed">
                        <attribute name="onClick"><![CDATA[
                        Treerow row = (Treerow) self.parent.parent;
                        Treeitem item = row.getParent();
                        row.detach();
                        item.appendChild(row);
                        ]]></attribute>
                        </button>
                    </treecell>
                </treerow>
            </treeitem>
        </treechildren>
    </tree>
</zk>