gtk.widget.Widget.setMarginBottom on the widgets contained in the row if you need this functionality. #GtkGrid does not support per-row spacing.
Table.setRowSpacing
void setRowSpacing(uint row, uint spacing)Changes the space between a given table row and the subsequent row.
Parameters
row | row number whose spacing will be changed. |
spacing | number of pixels that the spacing should take up. |
Deprecated
Use gtk.widget.Widget.setMarginTop and