code: function normalize(number, map/*, opts*/) {
      map.number = '+1' + /(?=\+?1)?(\d{10})$/.exec(String(map.number))[1];
      if (map.smsGateway) {
        map.smsGateway = map.number.replace(/^\+1/, '') + map.smsGateway.replace(/.*@/, '@');
      }
      if (map.mmsGateway) {
        map.mmsGateway = map.number.replace(/^\+1/, '') + map.mmsGateway.replace(/.*@/, '@');
      }
      return map;
    }
docs: TODO move