<odoo noupdate="1">
        <record id="maintenance.stage_0" model="maintenance.stage">
            <field name="button_class">info</field>
            <field name="next_stage_ids" eval="[(4, ref('maintenance.stage_1'))]" />
        </record>
        <record id="maintenance.stage_1" model="maintenance.stage">
            <field name="button_class">warning</field>
            <field
            name="next_stage_ids"
            eval="[(4, ref('maintenance.stage_3')), (4, ref('maintenance.stage_4'))]"
        />
        </record>
        <record id="maintenance.stage_3" model="maintenance.stage">
            <field name="button_class">success</field>
        </record>
        <record id="maintenance.stage_4" model="maintenance.stage">
            <field name="button_class">danger</field>
        </record>
</odoo>
