<?xml version="1.0"?>
<form string="Country Group">
                    <sheet>
                        <div class="oe_title">
                            <label for="name" string="Group Name"/>
                            <h1><field name="name" placeholder="e.g. Europe"/></h1>
                        </div>
                        <group name="country_group">
                            <field name="code"/>
                            <field name="country_ids" widget="many2many_tags" options="{'no_open': True, 'no_create': True}"/>
                        </group>
                    </sheet>
                </form>
            