void startDurableClient(VM vm, String durableClientId, int serverPort1,
      String regionName) {
    vm.invoke(() -> {
      createCacheClient(
          getClientPool(NetworkUtils.getServerHostName(), serverPort1, true),
          regionName, getClientDistributedSystemProperties(durableClientId), Boolean.TRUE);
      assertThat(getClientCache()).isNotNull();
    });
  }
Returns the durable client proxy's HARegionQueue region name. This method is accessed via
reflection on a server VM.

@return the durable client proxy's HARegionQueue region name
geode-cq/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/DurableClientTestBase.java