@Override
  public int hashCode() {
    int hashCode = 1;

    hashCode = hashCode * 8191 + ((isSetRow()) ? 131071 : 524287);
    if (isSetRow())
      hashCode = hashCode * 8191 + row.hashCode();

    hashCode = hashCode * 8191 + ((isSetColumns()) ? 131071 : 524287);
    if (isSetColumns())
      hashCode = hashCode * 8191 + columns.hashCode();

    hashCode = hashCode * 8191 + ((isSetSortedColumns()) ? 131071 : 524287);
    if (isSetSortedColumns())
      hashCode = hashCode * 8191 + sortedColumns.hashCode();

    return hashCode;
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/TRowResult.java