<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>
        <referenceContainer name="columns">
            <!-- @DO add div wrapper to contain sidebars -->
            <container name="div.column.sidebar" htmlId="column-sidebar" htmlTag="div" htmlClass="column-sidebar" before="main" label="Sidebar Column" />
        </referenceContainer>
        <!-- @DO move sidebars to column sidebar wrapper -->
        <move element="div.sidebar.main" destination="div.column.sidebar" before="-" />
        <move element="div.sidebar.additional" destination="div.column.sidebar" after="div.sidebar.main" />
    </body>
</page>
