Analyze does not respect linked translation in enum

[ChaserVasya]

To Reproduce
tr_ru.i18n.json:

{
  "scheduleFailedBlockDefault": "Редактирование невозможно",
  "scheduleFieldBlockMap(context=ScheduleTemplateFieldType, param=type)": {
    "assistant": "Выберите услугу",
    "status": "Статус нельзя изменить",
    "employee": "Выберите тренера",
    "service": "Выберите локацию",
    "duration": "Выберите услугу",
    "room": "Выберите услугу",
    "capacity": "Выберите услугу",
    "date": "Выберите услугу",
    "time": "Выберите услугу",
    "visitor": "Выберите дату",
    "cancelReason,location,comment,guest,totalArrived": "@:scheduleFailedBlockDefault"
  }
}

dart run slang analyze -full
_unused_translations.json:

{
  "@@info": [
    "Here are translations that exist in secondary locales but not in <ru>.",
    "[--full enabled] Furthermore, translations not used in 'lib/' according to the 'tr.<path>' pattern are written into <ru>."
  ],
  "ru": {
    "scheduleFailedBlockDefault": "Редактирование невозможно"
  }
  ....
}

Expected behavior

{
  "@@info": [
    "Here are translations that exist in secondary locales but not in <ru>.",
    "[--full enabled] Furthermore, translations not used in 'lib/' according to the 'tr.<path>' pattern are written into <ru>."
  ],
  "ru": { }
  ....
}

Additional context
3.31.1

[Tienisto]

Fixed in 4.0.0-dev.0