i want to apply for all Q-web reports a specific footer, i am in Odoo 13, back in the previous versions i did it through this code 

<template id="external_layout_footer_inherit_cr" 
            inherit_id="report.external_layout_footer">
            <xpath expr="//div[@class='footer']" position="replace">
                <div class="footer">
              <--! my code --> 
                </div>
            </xpath>
     </template>

but now i can't find the right class to inherit from , any suggestion ?