How to fill missing newsletter = ''

root.ts2

SMS < page
SMS {
    newsletter {
        renderer = RFY.BKWI:SmsMailRender
    }

    head {
        stylesheets.site.templatePath = 'resource://RFY.BKWI/Private/Newsletter/Templates/SMS/Browser.html'
        javascripts.site.templatePath = 'resource://RFY.BKWI/Private/Newsletter/Templates/SMS/Browser.html'
    }
    bodyTag.attributes.class = 'SMS'
    body {
        templatePath = 'resource://RFY.BKWI/Private/Newsletter/Templates/SMS/Browser.html'

        version = ${q(node).property('version')}
        aboutPage = ${q(node).property('aboutPage')}
        contactPage = ${q(node).property('contactPage')}
        subscriptionPage = ${q(node).property('subscriptionPage')}
        subContent >

        javascripts.site.templatePath = 'resource://RFY.BKWI/Private/Newsletter/Templates/SMS/Browser.html'
    }
}

root.newsletter {
    renderer = RFY.BKWI:BKWInsiderMailRender
}

newsletter {
    renderer = RFY.BKWI:BKWInsiderMailRender
}