Does the subject deserve an contact pane?
function (subject) {
    var kb = UI.store
    var ns = UI.ns
    var t = kb.findTypeURIs(subject)
    if (t[ns.ldp('Resource').uri]) return 'Sharing' // @@ be more sophisticated?
    if (t[ns.ldp('Container').uri]) return 'Sharing' // @@ be more sophisticated?
    if (t[ns.ldp('BasicContainer').uri]) return 'Sharing' // @@ be more sophisticated?
    // check being allowed to see/change shgaring?
    return null // No under other circumstances
  }