server-tools/base_cron_exclusion/views/ir_cron_view.xml

<?xml version="1.0"?>
<!-- Copyright 2017 Eficent Business and IT Consulting Services S.L.
     License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl-3.0) -->

<odoo>
    <record id="ir_cron_view_form" model="ir.ui.view">
        <field name="name">ir.cron.form - base_cron_exclusion</field>
        <field name="model">ir.cron</field>
        <field name="inherit_id" ref="base.ir_cron_view_form"/>
        <field name="arch" type="xml">
            <notebook position="inside">
                <page name="exclusive_cron" groups="base.group_no_one"
                      string="Mutually Exclusive Scheduled Actions">
                    <field name="mutually_exclusive_cron_ids"/>
                </page>
            </notebook>
        </field>
    </record>
</odoo>