docs: private EntryEventType getCQCEventTypeOrNull(EntryEventType eventType, EventFilter eventFilter,
                                                   Data dataKey, Data dataNewValue, Data dataOldValue, String mapName) {
          boolean newValueMatching = filteringStrategy.doFilter(eventFilter, dataKey, dataOldValue, dataNewValue,
                  eventType, mapName) != FilteringStrategy.FILTER_DOES_NOT_MATCH;
          if (eventType == UPDATED) {
              // UPDATED event has a special handling as it might result in either ADDING or REMOVING an entry to/from CQC
              // depending on a predicate
              boolean oldValueMatching = filteringStrategy.doFilter(eventFilter, dataKey, null, dataOldValue,
                      EntryEventType.ADDED, mapName) != FilteringStrategy.FILTER_DOES_NOT_MATCH;
              if (oldValueMatching) {
                  if (!newValueMatching) {
                      eventType = REMOVED;
                  }
              } else {
                  if (newValueMatching) {
                      eventType = ADDED;
                  } else {
                      //neither old value nor new value is matching -> it's a non-event for the CQC
                      return null;
                  }
              }
          } else if (!newValueMatching) {
              return null;
          }
          return eventType;
      }