    'label'   => 'Email',
    'info'    => 'Send the user a thank you email',
    'default' => $oItem->thankyou_email->send ?? false,
    'data'    => [
        'revealer' => 'thankyou-email',
    ],
]);

echo form_field([
    'key'         => 'thankyou_email_subject',
    'label'       => 'Subject',
    'placeholder' => 'Define the subject of the thank you email',