auto *manager0 =new metall::manager(metall::create_only,"/tmp/dir0");auto *manager1 =new metall::manager(metall::create_only,"/tmp/dir1");auto *vec0 = manager0->construct<vector_t>(metall::anonymous_instance)(manager0->get_allocator());vec0->push_back(10);auto *vec1 = manager1->construct<vector_t>(metall::anonymous_instance)(manager1->get_allocator());// This PR affects the behaviors of the following three operations:// 1. copy assignment*vec1 = *vec0;// 2. move assignment// However, copy will be performed instead of move.*vec1 = std::move(*vec0);// 3. swap// !! This operation does work anymoreusing std::swap;swap(*vec1, *vec0);// Can close the manager0 here which allocated vec0// because the allocator in vec0 is not propagated to vec1,// i.e., vec1 does not access memory resources in manager0.delete manager0;for (constauto &v: *vec1) {  std::cout << v << std::endl;}