return empty_buffer_;
    }
    const_attribute_to_buffer_map_[attr] = index;
  }

  // TF doesn't currently support 4-bit types (DT_INT4), so we'll run into
  // trouble calling ConvertToTensor(). For now, extract the tensor data from
  // ElementsAttr directly in this and read type from tflite::TensorType instead
  // of tensorflow::DataType.
  auto type = mlir::cast<TensorType>(value.getType());