docs: public static String makeSafeFilename(String filename) {
          // Replace invalid characters
          for (final Map.Entry<Pattern, String> pair : REPLACEMENT_PAIRS.entrySet()) {
              final Pattern pattern = pair.getKey();
              final Matcher matcher = pattern.matcher(filename);
              filename = matcher.replaceAll(pair.getValue());
          }
  
          // Make sure the name doesn't violate a Windows reserved word...
          for (Pattern pattern : WINDOWS_INVALID_PATTERNS) {
              if (pattern.matcher(filename).matches()) {
                  filename = "uP-" + filename;
                  break;
              }
          }
  
          return filename;
      }