mayen","swaziland","sweden","switzerland","syria","taiwan","tajikistan","tanzania","thailand","timor-leste","togo","tokelau","tonga","trinidad and tobago","tunisia","turkey","turkmenistan","turks and caicos islands","tuvalu","uganda","ukraine","united arab emirates","united kingdom","united states minor outlying islands","united states","uruguay","uzbekistan","vanuatu","venezuela","vatican city","vietnam","virgin islands (british)","virgin islands (us)","wallis and futuna","western sahara","yemen","zambia","zimbabwe","åland...

                    logger.debug("Deleted empty directory: {}", dir);
                }
                return true;
            }
            return false;
        }

    }

    /**
     * Migrates existing thumbnail files to the new directory structure.
     */
    public void migrate() {
        new Thread(() -> {
            final Path basePath = baseDir.toPath();