WALEdit add(List<ExtendedCell> cells) {
    if (cells == null || cells.isEmpty()) {
      return this;
    }
    for (ExtendedCell cell : cells) {
      add(cell);
    }
    return this;
  }
@return True when current WALEdit is created by log replay. Replication skips WALEdits from
        replay.
hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALEdit.java