.getRank();

  // To quantize rhs per-channel, we currently only consider the case where
  // `stablehlo.dot_general` is legalizable to `tfl.fully_connected`.
  const bool is_per_axis_quantizable =
      IsDotGeneralFullyConnected(dot_general_op).value();
  if (!is_per_axis_quantizable) return std::nullopt;
  return filter_rank - 1;
}