// Append user-provided specs to override existing specs.
  const QuantizationSpecs& previous_specs = config.specs();
  new_specs.mutable_specs()->Add(previous_specs.specs().begin(),
                                 previous_specs.specs().end());

  config.clear_static_range_ptq_preset();
  config.mutable_specs()->Swap(&new_specs);
}

void ExpandWeightOnlyPtqPreset(QuantizationConfig& config) {