<div height="300px" style="display:block; border:1px solid red; overflow:auto">
    <vlayout id="block" visible="false">
        <zscript>Object[] spaces = new Object[10];</zscript>
        <space forEach="${spaces}"/>
    </vlayout>
    <button label="click" onClick="block.setVisible(!block.isVisible())"/>
    <grid>
        <zscript>Object[] o = new Object[5];</zscript>
        <frozen columns="1"/>
        <columns>
            <column width="100px" forEach="${o}">Column</column>
        </columns>
        <rows>
            <row forEach="${o}">
                <cell forEach="${o}">cell</cell>
            </row>
        </rows>
    </grid>
</div>