void handleEvent(const EntryHeapVector& entries) override {
   EntrySyncHeapVector syncEntries;
   syncEntries.reserveInitialCapacity(entries.size());
   for (size_t i = 0; i < entries.size(); ++i)
     syncEntries.uncheckedAppend(EntrySync::create(entries[i].get()));
   m_reader->addEntries(syncEntries);
 }