}
        }
      }
    },
    DECODE_CHECKED {
      @Override
      void assertFailsToDecode(
          BaseEncoding encoding, String cannotDecode, @Nullable String expectedMessage) {
        try {
          encoding.decodeChecked(cannotDecode);
          fail("Expected DecodingException");
        } catch (DecodingException expected) {

   *
   * @throws IllegalArgumentException if the input is not a valid encoded string according to this
   *     encoding.
   */
  public final byte[] decode(CharSequence chars) {
    try {
      return decodeChecked(chars);
    } catch (DecodingException badInput) {
      throw new IllegalArgumentException(badInput);
    }
  }

  /**