code: public TF_Graph loadGraph(String filePath, TF_Status status) throws IOException {
          byte[] bytes = Files.readAllBytes(Paths.get(filePath));
          return loadGraph(bytes, status);
      }
docs: Get an initialized {@link TF_Graph}
  based on the passed in file
  (the file must be a binary protobuf/pb file)
  The graph will be modified to be associated
  with the device associated with this current thread.
  
  Depending on the active {@link Nd4j#getBackend()}
  the device will either be the gpu pinned to the current thread
  or the cpu
  @param filePath the path to the file to read
  @return the initialized graph
  @throws IOException