connector-telephony/smsclient_core/views/serveraction_view.xml

<?xml version="1.0"?>
<odoo>
        <record model="ir.ui.view" id="view_server_statistics_graph">
            <field name="name">ir.actions.server.form.inherit</field>
            <field name="model">ir.actions.server</field>
            <field name="inherit_id" ref="base.view_server_action_form"/>
            <field name="arch" type="xml">
                <page name="code" position="after" autofocus="autofocus">
                    <page string="SMS" name="sms" attrs="{'invisible': [('state', '!=', 'sms')]}">
                        <group>
                            <field name="sms"/>
                            <field name="mobile"/>
                            <field name="sms_server" invisible="1"/>
                            <field name="sms_template_id" domain="[('sms_template','=',True)]" attrs="{'required':[('state','=','sms')]}"/>
                        </group>
                    </page>
                </page>
            </field>
        </record>
</odoo>