message: make importers unique for a basename
diff: @@ -157,7 +157,8 @@ inline std::shared_ptr<Importer> getImporter(
  return nullptr;
  }
  std::string importer = fnd->second;
  - std::string nodeName = baseName + "_importer";
  + static int num = 0;
  + std::string nodeName = baseName + "_" + std::to_string(num++) + "_importer";
  if (cat.find(fullName) != cat.end()) {
  // Existing import, instance it!
  