public static WALProtos.BulkLoadDescriptor getBulkLoadDescriptor(Cell cell) throws IOException {
    return CellUtil.matchingColumn(cell, METAFAMILY, BULK_LOAD)
      ? WALProtos.BulkLoadDescriptor.parseFrom(CellUtil.cloneValue(cell))
      : null;
  }
Deserialized and returns a BulkLoadDescriptor from the passed in Cell
@param cell the key value
@return deserialized BulkLoadDescriptor or null.
hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALEdit.java