docs: public synchronized void save() {
          if (BulkChange.contains(this)) {
              return;
          }
          
          File file = getConfigFile();
          try {
              List<String> allSignatures = new ArrayList<>(whitelistSignaturesFromUserControlledList);
              blacklistSignaturesFromUserControlledList.stream()
                      .map(signature -> "!" + signature)
                      .forEach(allSignatures::add);
              
              FileUtils.writeLines(file, allSignatures);
          } catch (IOException e) {
              LOGGER.log(Level.WARNING, "Failed to save " + file.getAbsolutePath(), e);
          }
      }