TfLiteRegistration* Register_CONCATENATION_REF() {
  static TfLiteRegistration r = {
      nullptr, nullptr, concatenation::Prepare,
      concatenation::Eval<concatenation::kReference>};
  return &r;
}
TfLiteRegistration* Register_CONCATENATION_REF() {
  static TfLiteRegistration r = {
      nullptr, nullptr, concatenation::Prepare,
      concatenation::Eval<concatenation::kReference>};
  return &r;
}