public static void unregisterInterest() {
    Region<String, String> r = cache.getRegion(SEPARATOR + REGION_NAME);
    r.unregisterInterest("k1");
  }
@param connectedServers is the expected number of connected servers (1 or more)
@param redundantServers is the expected number of redundant servers (0 or more)
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/RedundancyLevelTestBase.java