<?xml version="1.0"?>
<form>
                <div>
                    <field name="warning_message"/>
                </div>
                <footer>
                    <button name="order_avbl" type="object" class="btn-primary" invisible="free_qty &lt;= 0.0">
                        Order <field name="free_qty"/>
                    </button>
                    <button name="order_all" type="object">
                        Order <field name="qty_to_order"/>
                    </button>
                    <button string="Cancel" class="btn-secondary" special="cancel"/>
                </footer>
            </form>
        