<?xml version="1.0"?>
<tree string="Product Variants">
                    <field name="default_code"/>
                    <field name="name"/>
                    <field name="product_template_attribute_value_ids" widget="many2many_tags" groups="product.group_product_variant"/>
                    <field name="standard_price"/>
                    <field name="uom_id" options="{'no_open': True, 'no_create': True}" groups="uom.group_uom"/>
                    <field name="barcode"/>
                </tree>
            