public static void addListenerOnRegion(String regionName) {
    WANTestBase test = new WANTestBase();
    test.addCacheListenerOnRegion(regionName);
  }
Returns a Map that contains the count for number of cache server and number of Receivers.
geode-wan/src/distributedTest/java/org/apache/geode/internal/cache/wan/WANTestBase.java