<?xml version="1.0"?>
<tree string="Mailing Traces" create="0">
                <field name="mass_mailing_id"/>
                <field name="email"/>
                <field name="message_id"/>
                <field name="sent_datetime"/>
                <field name="links_click_datetime"/>
                <field name="trace_status" widget="badge"/>
                <field name="failure_type" optional="show"/>
                <field name="open_datetime" optional="hide"/>
                <field name="reply_datetime" optional="hide"/>
                <button name="action_view_contact" type="object" string="Open Recipient" icon="fa-user"/>
            </tree>
        