code: public static byte[] decode(String s, int options) {
          if (s == null) {
              throw new IllegalArgumentException("Input string was null.");
          }
  
          byte[] bytes = s.getBytes(UTF_8);
          return decode(bytes, 0, bytes.length, options);
      }
docs: Decodes data from Base64 notation, automatically
  detecting gzip-compressed data and decompressing it.
  
  @param s the string to decode
  @param options encodeToString options such as URL_SAFE
  @return the decoded data
  @throws NullPointerException if <code>s</code> is null