private Set getAllClientsWithInterestInv() {
    Set clientsWithInterestInv = new HashSet(getAllKeyClientsInv());
    clientsWithInterestInv.addAll(getPatternsOfInterestInv().keySet());
    clientsWithInterestInv.addAll(getFiltersOfInterestInv().keySet());
    clientsWithInterestInv.addAll(getKeysOfInterestInv().keySet());
    return clientsWithInterestInv;
  }
return a set containing all clients that have registered interest for invalidations
geode-core/src/main/java/org/apache/geode/internal/cache/FilterProfile.java