code: private static String wrapWith(char wrapper, String... input) {
          StringBuilder escaped = new StringBuilder();
          for (String i : input) {
              escaped.append(", ");
              escaped.append(wrapper).append(i).append(wrapper);
          }
          if (escaped.length() > 2) {
              escaped.delete(0, 2);
          }
          return escaped.toString();
      }
docs: Helper method to wrap varargs with the given character.
  
  @param wrapper the wrapper character.
  @param input the input fields to wrap.
  @return a concatenated string with characters wrapped.