<?xml version="1.0"?>
<data><xpath expr="//div[@name='button_box']" position="inside">
                <button name="action_view_sale_order" type="object" class="oe_stat_button" icon="fa-usd" groups="sales_team.group_sale_salesman" invisible="not sale_order_id">
                        <div class="o_stat_info">
                            <span class="o_stat_text">Sale Order</span>
                        </div>
                </button>
            </xpath>
            <group name="transaction" position="inside">
                <field name="sale_order_id"/>
                <field name="sale_order_line_id" readonly="1" invisible="not sale_order_id"/>
            </group>
        </data>