private void unregisterClientIDFromMap(Long clientID, Map interestMap, Set keysUnregistered) {
    if (interestMap.get(clientID) != null) {
      Map removed = (Map) interestMap.remove(clientID);
      if (removed != null) {
        keysUnregistered.addAll(removed.keySet());
      }
    }
  }
Unregisters a client's interest

@param inputClientID The identity of the client that is losing interest
@param interest The key in which to unregister interest
@param interestType the type of uninterest
@return the keys unregistered, which may be null
geode-core/src/main/java/org/apache/geode/internal/cache/FilterProfile.java