@Override
    public int hashCode() {
      return Objects.hash(startRow, stopRow);
    }
Creates a new instance of this class while copying all values.
@param scan The scan instance to copy from.
@throws java.io.IOException When copying the values fails.
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableSnapshotInputFormatImpl.java