default int getChunkId() {
    return CELL_NOT_BASED_ON_CHUNK;
  }
Extracts the id of the backing bytebuffer of this cell if it was obtained from fixed sized
chunks as in case of MemstoreLAB
@return the chunk id if the cell is backed by fixed sized Chunks, else return
        {@link #CELL_NOT_BASED_ON_CHUNK}; i.e. -1.
hbase-common/src/main/java/org/apache/hadoop/hbase/ExtendedCell.java