<?xml version="1.0" encoding="utf-8"?>
<form>
    <fieldset name="service">
        <field name="list" type="acymailing"
            label="PLG_CONVERTFORMS_ACYMAILING_LIST_ID"
            description="PLG_CONVERTFORMS_ACYMAILING_LIST_ID_DESC"
            required="true"
            multiple="true"
        />
        <field name="doubleoptin" type="radio"
            label="PLG_CONVERTFORMS_ACYMAILING_DOUBLEOPTIN"
            description="PLG_CONVERTFORMS_ACYMAILING_DOUBLEOPTIN_DESC"
            class="btn-group btn-group-yesno"
            default="0">
            <option value="0">JNO</option>
            <option value="1">JYES</option>
        </field>
    </fieldset>
</form>