public void doClientRegionRegisterInterest(boolean isDurable) {
    Region<String, String> region = clientCache.getRegion("serverRegion");
    region.registerInterestRegex(".*", // everything
        InterestResultPolicy.DEFAULT, true);
  }
Written to test fix for Bug #47132
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/InterestRegrListenerDUnitTest.java