void InstanceImpl::maybeCreateHeapShrinker() {

  heap_shrinker_ =

      std::make_unique<Memory::HeapShrinker>(dispatcher(), overloadManager(), *stats().rootScope());

}

absl::StatusOr<std::unique_ptr<OverloadManager>> InstanceImpl::createOverloadManager() {

  return OverloadManagerImpl::create(

      dispatcher(), *stats().rootScope(), threadLocal(), bootstrap().overload_manager(),

      messageValidationContext().staticValidationVisitor(), api(), options());

}

std::unique_ptr<OverloadManager> InstanceImpl::createNullOverloadManager() {

  return std::make_unique<NullOverloadManager>(threadLocal(), false);

}

                                  const Server::Configuration::Watchdog& config) {

  return std::make_unique<Server::GuardDogImpl>(*stats().rootScope(), config, api(), name);

}

                                     Ssl::ContextManager& ssl_context_manager) {

  return std::make_unique<Upstream::HdsDelegate>(server_context, scope, std::move(async_client),

                                                 stats, ssl_context_manager);

}