Table.setColSpacing

void setColSpacing(uint column, uint spacing)

Alters the amount of space between a given table column and the following column.

`column`	the column whose spacing should be changed.
`spacing`	number of pixels that the spacing should take up.

Use [gtk.widget.Widget.setMarginStart] and

[gtk.widget.Widget.setMarginEnd] on the widgets contained in the row if you need this functionality. #GtkGrid does not support per-row spacing.