public byte[] getRow() {
    if (this.row == null) {
      this.row =
        (this.cells == null || this.cells.length == 0) ? null : CellUtil.cloneRow(this.cells[0]);
    }
    return this.row;
  }
Method for retrieving the row key that corresponds to the row from which this Result was
created.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java