private void thereAndBack(byte[] bytes) { final ByteString byteString = new ByteString(bytes); final byte[] bytes2 = byteString.getBytes(); assertThat(bytes, equalTo(bytes2)); final String base64String = byteString.toBase64String(); final ByteString byteString1 = ByteString.ofBase64(base64String); assertThat(byteString, equalTo(byteString1)); }