docs: public void asFlatFile(@NonNull File file) throws IOException {
          val fb = asFlatBuffers();
          val offset = fb.position();
  
          val array = fb.array();
  
          try (val fos = new FileOutputStream(file); val bos = new BufferedOutputStream(fos); val dos = new DataOutputStream(bos)) {
              dos.write(array, offset, array.length - offset);
          }
      }