message: Skip version conversion if non-ONNX domain and throw explicit error
diff: @@ -76,9 +76,9 @@ void DefaultVersionConverter::convert_graph(
  "Please be advised the converted model may not be working properly if target runtime does not support this "
  "experimental op."
  << std::endl;
  - continue;
  - }
  - if (op_name != "Undefined" && op_name != "Captured") {
  + } else if (cur_op->domain() != "" && cur_op->domain() != "ai.onnx") {
  + std::cerr << "Warning: opset domain '" << cur_op->domain() << "' is not supported." << std::endl;
  + } else if (op_name != "Undefined" && op_name != "Captured") {
  auto& op_domain_map = all_schemas.at(op_name);
  OpSetID curr_id(curr_version);
  OpSetID next_id(curr_version + step);
  