CreateMetadataVector();

  // Builds and returns list of tfl.SignatureDef sections in the model.
  std::optional<VectorBufferOffset<BufferOffset<tflite::SignatureDef>>>
  CreateSignatureDefs(const std::vector<SignatureDefData>& signature_defs);

  // Returns list of offsets for the passed 'items' in TensorMap structure
  // inside the flatbuffer.