@Override
    public FindInfo findEntriesSince(FindToken token, long maxTotalSizeOfEntries, String hostname,
        String remoteReplicaPath) throws StoreException {
      operationReceived = RequestOrResponseType.ReplicaMetadataRequest;
      tokenReceived = token;
      maxTotalSizeOfEntriesReceived = maxTotalSizeOfEntries;
      throwExceptionIfRequired();
      return new FindInfo(Collections.emptyList(),
          findTokenHelper.getFindTokenFactoryFromReplicaType(ReplicaType.DISK_BACKED).getNewFindToken());
    }
Mocked {@link Store} that is intended to perform predefined behavior.
ambry-server/src/test/java/com/github/ambry/server/MockStorageManager.java