signature_key = signature_constants.DEFAULT_SERVING_SIGNATURE_DEF_KEY
    tags = {tag_constants.SERVING}

    input_placeholder = self._create_and_save_tf1_conv_model(
        self._input_saved_model_path,
        signature_key,
        tags,
        input_key='x',
        output_key='output',
        use_variable=True,
    )

              num_bits=8,
              narrow_range=False,
          )
        return {'output': out}

    return EinsumModel()

  def _create_and_save_tf1_conv_model(
      self,
      saved_model_path: str,
      signature_key: str,
      tags: Collection[str],
      input_key: str,
      output_key: str,
      *,