@Override
    public boolean replicate(ReplicateContext replicateContext) {
      LOG.info(replicateContext.getEntries().toString());
      replicateContext.entries.stream().map(WAL.Entry::getEdit).map(WALEdit::getCells)
        .forEachOrdered(CELLS::addAll);
      return super.replicate(replicateContext);
    }
Confirm that the empty replication endpoint can work.
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestVerifyCellsReplicationEndpoint.java