private Long getClientIDForMaps(Object inputClientID) {
    Long clientID;
    if (inputClientID instanceof Long) {
      clientID = (Long) inputClientID;
    } else {
      clientID = clientMap.getWireID(inputClientID);
    }
    return clientID;
  }
When clients are registered they are assigned a Long identifier. This method maps between the
real client ID and its Long identifier.
geode-core/src/main/java/org/apache/geode/internal/cache/FilterProfile.java