message: refactor: change GetUnsupportedOpsInBlock to std::unordered_map<c10::OperatorName, std::string>
diff: @@ -428,15 +428,17 @@ std::string ConvertBlockToEngine(const torch::jit::Block* b, ConversionInfo buil
  return engine;
  }
  -std::unordered_set<c10::OperatorName> GetUnsupportedOpsInBlock(const torch::jit::Block* b) {
  - std::unordered_set<c10::OperatorName> unsupported_ops;
  +std::unordered_map<c10::OperatorName, std::string> GetUnsupportedOpsInBlock(const torch::jit::Block* b) {
  + std::unordered_map<c10::OperatorName, std::string> unsupported_ops;
  for (const auto n : b->nodes()) {
  if (n->kind() != torch::jit::prim::Loop && n->kind() != torch::jit::prim::If && !OpSupported(n)) {
  auto schema = n->maybeSchema();
  TRTORCH_CHECK(
  schema,
  "Unable to get schema for Node " << util::node_info(n) << " (conversion.VerifyCoverterSupportForBlock)");
  - unsupported_ops.insert(schema->operator_name());
  + std::stringstream ss;
  + ss << *schema;
  + unsupported_ops[schema->operator_name()] = ss.str();
  }
  for (const auto sub_b : n->blocks()) {
  auto sub_b_unsupported_ops = GetUnsupportedOpsInBlock(sub_b);
  @@ -478,7 +480,7 @@ bool VerifyConverterSupportForBlock(const torch::jit::Block* b) {
  unsupported_msg << "Method requested cannot be compiled by TRTorch.\nUnsupported operators listed below:"
  << std::endl;
  for (auto s : unsupported_ops) {
  - unsupported_msg << " - " << s << std::endl;
  + unsupported_msg << " - " << s.second << std::endl;
  }
  unsupported_msg << "You can either implement converters for these ops in your application or request implementation"
  << std::endl;
  @@ -489,7 +491,7 @@ bool VerifyConverterSupportForBlock(const torch::jit::Block* b) {
  auto schema = n->maybeSchema();
  if (schema){
  for (const auto& x: unsupported_ops) {
  - if (x == schema->operator_name()) {
  + if (x.first == schema->operator_name()) {
  unsupported_msg << " Unsupported operator: " << *schema << std::endl;
  unsupported_msg << trtorch::core::util::GetPyTorchSourceCode(n) << std::endl;
  }
  