@Override
  public void transferTo(File destination) throws IOException {
    try (var outputStream = new FileOutputStream(destination)) {
      outputStream.write(bytes);
    }
  }
Straight-forward implementation of interface {@link MultipartFile} where the file data is held as
a byte array in memory.
form-spring/src/main/java/feign/form/spring/converter/ByteArrayMultipartFile.java