private MyExistLocalesListModel() {
   myLocales = new ArrayList<>();
   myLocales.add(PropertiesUtil.DEFAULT_LOCALE);
   PropertiesReferenceManager.getInstance(myProject)
       .processPropertiesFiles(
           GlobalSearchScope.projectScope(myProject),
           new PropertiesFileProcessor() {
             @Override
             public boolean process(String baseName, PropertiesFile propertiesFile) {
               final Locale locale = propertiesFile.getLocale();
               if (locale != PropertiesUtil.DEFAULT_LOCALE && !myLocales.contains(locale)) {
                 myLocales.add(locale);
               }
               return true;
             }
           },
           BundleNameEvaluator.DEFAULT);
   Collections.sort(myLocales, LOCALE_COMPARATOR);
 }