docs: public boolean lock(String id) {
      File file = new File(directory, String.format(".%s.lock", prefix));
      try {
        if (file.createNewFile()) {
          try (FileBuffer buffer = FileBuffer.allocate(file)) {
            buffer.writeString(id).flush();
          }
          return true;
        } else {
          try (FileBuffer buffer = FileBuffer.allocate(file)) {
            String lock = buffer.readString();
            return lock != null && lock.equals(id);
          }
        }
      } catch (IOException e) {
        throw new StorageException("Failed to acquire storage lock");
      }
    }