Method that sets an override row offset on the input rectangular pattern. If not already overridden, the method has the effect of setting the 'Override' flag for the row offset.
| Name | Type | Description |
| Pattern | RectangularOccurrencePattern | Input RectangularOccurrencePattern object that specifies the pattern to be overridden. |
| RowOffset | String | Input String that specifies the override row offset. |