server-ux/base_tier_validation_formula/views/tier_definition_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright 2017 Eficent Business and IT Consulting Services S.L.
     License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl). -->
<odoo>

    <record id="tier_definition_view_form" model="ir.ui.view">
        <field name="name">tier.definition.form</field>
        <field name="model">tier.definition</field>
        <field name="inherit_id"
               ref="base_tier_validation.tier_definition_view_form"/>
        <field name="arch" type="xml">
            <xpath expr="//form/sheet/group" position="after">
                <group col="4">
                        <field name="reviewer_expression" colspan="4"
                               attrs="{'invisible': [('review_type', '!=', 'expression')]}"/>
                    </group>
            </xpath>
            <field name="definition_domain" position="after">
                <field name="python_code"
                       attrs="{'invisible': [('definition_type', '!=', 'formula')]}"/>
            </field>
        </field>
    </record>

</odoo>