<xpath expr="//div[hasclass('o_settings_container')]" position="inside">
                <field name="company_id" invisible="1"/>
                <setting class="col-lg-12" help="Invoice your time and material to customers" invisible="context.get('hide_allow_billable', False)">
                    <field name="allow_billable"/>
                    <div invisible="not allow_billable">
                        <label for="partner_id"/>
                        <field name="partner_id" class="ms-1" widget="res_partner_many2one" context="{'res_partner_search_mode': 'customer'}" options="{'no_create_edit': True, 'no_open': True}" placeholder="Select who to bill..."/>
                    </div>
                </setting>
            </xpath>