web_techsystech/web_widget_radio_tree/static/src/xml/widget.xml

<?xml version="1.0" encoding="UTF-8"?>
<templates>
    <t t-name="RadioTree">
        <span class="oe_form_field oe_form_field_boolean oe_form_field_boolean_radio"
              t-att-style="widget.node.attrs.style">
            <input type="radio"
                t-att-id="widget.id_for_label"
                t-att-name="widget.name"
                t-att-tabindex="widget.node.attrs.tabindex"
                t-att-autofocus="widget.node.attrs.autofocus"
                class="field_boolean"/>
        </span>
    </t>
</templates>