code: public static SameDiff fromFlatFile(@NonNull File file) throws IOException {
          byte[] bytes;
          try (InputStream is = new BufferedInputStream(new FileInputStream(file))) {
              bytes = IOUtils.toByteArray(is);
          }
  
          ByteBuffer bbIn = ByteBuffer.wrap(bytes);
          return fromFlatBuffers(bbIn);
      }
docs: Create a {@link SameDiff}
  instance from a file.
  The method to save the file is
  {@link #asFlatFile(File)}
  @param file the file to load from
  @return the loaded same diff instance
  @throws IOException