<?xml version="1.0"?>
<form string="Product Tag">
                <sheet>
                    <group>
                        <group>
                            <field name="name"/>
                            <field name="color" widget="color_picker"/>
                        </group>
                    </group>
                    <group>
                        <field name="product_ids" widget="many2many_tags" attrs="{'invisible':[('product_ids','=',[])]}"/>
                    </group>
                </sheet>
            </form>
        