set_customer_groups/views/views.xml

<odoo>
  <data>
    <!-- explicit list view definition -->
    <record model="ir.ui.view" id="product_page_access.list">
      <field name="name">product_page_access list</field>
      <field name="model">product_page_access.page_product_mapping</field>
      <field name="arch" type="xml">
        <list>
          <field name="page"/>
          <field name="link_out_product"/>
          <field name="products"/>
        </list>
      </field>
    </record>

    <!-- actions opening views on models -->
    <record model="ir.actions.act_window" id="product_page_access.action_window">
      <field name="name">product_page_access window</field>
      <field name="res_model">product_page_access.page_product_mapping</field>
      <field name="view_mode">list,form</field>
    </record>

    <menuitem 
        name="Product Page Mappings" 
        id="product_page_access_menu_root" 
        parent="website_sale.menu_ecommerce"
        action="product_page_access.action_window"
        sequence="10"/>
  </data>
</odoo>