code: protected boolean processEntryEventFilter(EventFilter filter, Data dataKey) {
          EntryEventFilter eventFilter = (EntryEventFilter) filter;
          return eventFilter.eval(dataKey);
      }
docs: Evaluates filters of {@link EntryEventFilter} type.
  
  @param filter  the filter which must be a {@link EntryEventFilter}
  @param dataKey the event entry key
  @return {@code true} if the filter matches