code: public static String decodeToString(byte[] bytes, String enc)
        throws UnsupportedEncodingException {
      return new String(decode(bytes), enc);
    }
docs: Decode Base64 encoded bytes. Characters that are not part of the Base64 alphabet are ignored in
  the input.
  
  @param bytes The data to decode.
  @param enc Character encoding to use when converting to and from bytes.
  @return A decoded String.
  @throws UnsupportedEncodingException if the character encoding specified is not supported.
  @since ostermillerutils 1.02.16