docs: public void destroyAll(String owner) {
      File ownerDirectory = new File(rootDirectory, owner);
      boolean cleared = true;
      if (ownerDirectory.exists() && ownerDirectory.isDirectory()) {
        cleared = false;
        if (recursiveDeleteDirectoryContent(ownerDirectory)) {
          LOGGER.debug("Destroyed all file based persistence contexts owned by {}", owner);
          cleared = ownerDirectory.delete();
        }
      }
      if (!cleared) {
        LOGGER.warn("Could not delete all file based persistence contexts owned by {}", owner);
      }
    }