if (next != null) {
          newFirst = next;
        } else {
          removeCollectedEntry(e);
          newCount--;
        }
      }
      this.count = newCount;
      return newFirst;
    }

    @GuardedBy("this")
    void removeCollectedEntry(ReferenceEntry<K, V> entry) {
      enqueueNotification(
          entry.getKey(),
          entry.getHash(),