code: @Function
      public static String randomizeLetterCase(String text) {
          StringBuilder result = new StringBuilder();
          for (int i = 0; i < text.length(); i++) {
              char c = text.charAt(i);
              if (RANDOM.nextBoolean()) {
                  c = toUpperCase(c);
              } else {
                  c = toLowerCase(c);
              }
              result.append(c);
          }
          return result.toString();
      }
docs: Takes a string and randomizes which letters in the text are upper or
  lower case
  @param text
  @return