protected FilterProfile getProfile(String regionName) {
    try {
      return cacheClientProxy._cache.getFilterProfile(regionName);
    } catch (CancelException e) {
      return null;
    }
  }
Registers interest in the input region name and key
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/ClientInterestList.java