code: private boolean noMissingMapWideEvent(AtomicReferenceArray<Queue<Integer>> removedCountHolders) {
          for (int i = 0; i < partitionCount; i++) {
              if (removedCountHolders.get(i).isEmpty()) {
                  // means we still have not-received map-wide event for this partition
                  return false;
              }
          }
          return true;
      }
docs: Check if all map-wide events like {@link
  EntryEventType#CLEAR_ALL} or {@link EntryEventType#EVICT_ALL}
  were received. If an event is received, we populate its
  partitions' removed-entry-count-holder queue.
  
  @return {@code true} if we have received map-wide events from all
  partitions, otherwise return {@code false} to indicate there is
  still not-received map-wide events for some partitions.