partner-contact/partner_contact_age_range/views/res_partner_age_range_view.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <record id="view_partner_age-range_tree" model="ir.ui.view">
        <field name="name">res.partner.age.range.tree</field>
        <field name="model">res.partner.age.range</field>
        <field name="arch" type="xml">
            <tree string="Partner Age Range" editable="bottom">
                <field name="name" />
                <field name="age_from" />
                <field name="age_to" />
            </tree>
        </field>
    </record>
    <record id="view_partner_age_range_form" model="ir.ui.view">
        <field name="name">res.partner.age.range.form</field>
        <field name="model">res.partner.age.range</field>
        <field name="arch" type="xml">
            <form string="Partner Age Range">
                <sheet>
                    <group col="4">
                        <field name="name" />
                        <field name="age_from" />
                        <field name="age_to" />
                    </group>
                </sheet>
            </form>
        </field>
    </record>
    <record id="action_partner_age_range" model="ir.actions.act_window">
        <field name="name">Age Ranges</field>
        <field name="type">ir.actions.act_window</field>
        <field name="res_model">res.partner.age.range</field>
        <field name="domain">[]</field>
        <field name="context">{}</field>
        <field name="help">
            Manage the contact age range you want to have available in your system.
            For eg: 0-10, 11-20
        </field>
    </record>
    <menuitem
        id="menu_partner_age_range"
        action="action_partner_age_range"
        name="Age Ranges"
        sequence="2"
        parent="contacts.res_partner_menu_config"
    />
</odoo>