// 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) {

  QuantizationConfig config{};
  config.mutable_static_range_ptq_preset()->set_enable_full_int_quantization(
      true);

  QuantizationSpec& user_provided_spec = *config.mutable_specs()->add_specs();
  user_provided_spec.mutable_matcher()->mutable_function_name()->set_regex(
      "composite_dot_general_fn_1");
  user_provided_spec.mutable_method()->mutable_no_quantization();