<?xml version="1.0" encoding="UTF-8"?>
<templates xml:space="preserve">
    <t t-inherit="mail.ChatWindow" t-inherit-mode="extension">
        <xpath expr="//*[hasclass('o-mail-ChatWindow')]" position="attributes">
            <attribute name="class" add="border border-bottom-0" separator=" "/>
        </xpath>
    </t>
</templates>
