app-odoo/app_contacts_superbar/views/res_partner_views.xml

<odoo>
  <data>
      <!-- contact -->
    <record id="view_res_partner_filter_superbar" model="ir.ui.view">
        <field name="name">res.partner.select.superbar</field>
        <field name="model">res.partner</field>
        <field name="inherit_id" ref="base.view_res_partner_filter"/>
        <field name="arch" type="xml">
            <xpath expr="//search">
                <superbar view_mode="kanban,tree">
                    <field name="category_id"/>
                    <field name="country_id"/>
                    <field name="commercial_partner_id"
                           widget="ztree_search"
                           model="res.partner"
                           domain="[('is_company', '=', 1)]"
                           level="0"/>
                </superbar>
            </xpath>
        </field>
    </record>
  </data>
</odoo>