docs: @Pure
  	public static File normalizeWindowsNativeFilename(String filename) {
  		final String fn = extractLocalPath(filename);
  		if (fn != null && fn.length() > 0) {
  			final Pattern pattern = Pattern.compile(WINDOW_NATIVE_FILENAME_PATTERN);
  			final Matcher matcher = pattern.matcher(fn);
  			if (matcher.find()) {
  				return new File(fn.replace(WINDOWS_SEPARATOR_CHAR, File.separatorChar));
  			}
  		}
  		return null;
  	}