docs: public static String makeUnique(String className) {
          
          final Matcher m = UNIQUE_NAMING_PATTERN.matcher(className);
          
          if (m.matches()) {
              // get the current number
              final Integer number = Integer.parseInt(m.group(2));
              // replace the current number in the string with the number +1
              return m.group(1) + (number + 1);
          } else {
              return className + "__1";
          }
      }