// and returns std::nullopt on failure. The buffer index may be changed if
  // duplicated buffer is found.
  std::optional<BufferOffset<tflite::Buffer>> BuildBuffer(
      Value value, bool can_be_deduplicated, int& index);

  // Build TFLite tensor from the given type. This function is for tfl.lstm
  // intermediates, which should have UniformQuantizedType.