rowspan property
A non-negative integer value indicating how many rows the header cell spans or extends. The default value is 1; if its value is set to 0, the header cell will extends to the end of the table grouping section (<thead>, <tbody>, <tfoot>, even if implicitly defined), that the <th> belongs to. Values higher than 65534 are clipped at 65534.
Implementation
final int? rowspan;