server-tools/dead_mans_switch_server/security/res_groups.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
        <record id="group_user" model="res.groups">
            <field name="name">User</field>
            <field name="category_id" ref="base.module_category_monitoring" />
        </record>
        <record id="group_manager" model="res.groups">
            <field name="name">Manager</field>
            <field name="implied_ids" eval="[(4, ref('group_user'))]" />
            <field name="category_id" ref="base.module_category_monitoring" />
        </record>
    </data>
</openerp>