partner-contact/base_location_nuts/views/res_partner_nuts_view.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <record id="res_partner_nuts_tree" model="ir.ui.view">
        <field name="name">NUTS Items tree</field>
        <field name="model">res.partner.nuts</field>
        <field name="arch" type="xml">
            <tree string="NUTS Items">
                <field name="level" />
                <field name="code" />
                <field name="name" />
            </tree>
        </field>
    </record>
    <record id="res_partner_nuts_form" model="ir.ui.view">
        <field name="name">NUTS Items form</field>
        <field name="model">res.partner.nuts</field>
        <field name="arch" type="xml">
            <form string="NUTS Item">
                <group>
                    <group>
                        <field name="level" />
                        <field name="code" />
                        <field name="parent_id" />
                        <field name="name" />
                        <field name="not_updatable" />
                    </group>
                    <group>
                        <field name="country_id" />
                        <field name="state_id" />
                    </group>
                </group>
            </form>
        </field>
    </record>
    <record id="res_partner_nuts_action" model="ir.actions.act_window">
        <field name="name">NUTS Items</field>
        <field name="res_model">res.partner.nuts</field>
        <field name="view_mode">tree,form</field>
        <field name="help">You must click at import wizard to populate NUTS items
        in Odoo database in:
        Sales > Configuration > Address Book > Localization > Import NUTS 2013</field>
    </record>
    <record model="ir.ui.view" id="view_res_partner_nuts_filter">
        <field name="name">NUTS search filters</field>
        <field name="model">res.partner.nuts</field>
        <field name="arch" type="xml">
            <search string="Search NUTS">
                <field name="name" />
                <field name="country_id" />
                <field name="state_id" />
                <group expand="0" string="Group By">
                    <filter
                        name="country"
                        string="Country"
                        domain="[]"
                        context="{'group_by': 'country_id'}"
                    />
                    <filter
                        name="level"
                        string="Level"
                        domain="[]"
                        context="{'group_by': 'level'}"
                    />
                </group>
            </search>
        </field>
    </record>
    <menuitem
        action="res_partner_nuts_action"
        id="res_partner_nuts_menu"
        groups="base.group_partner_manager"
        name="NUTS Items"
        parent="contacts.menu_localisation"
        sequence="40"
    />
</odoo>