gtk/icon_view.go
func (v *IconView) SetColumnSpacing(columnSpacing int) {
	C.gtk_icon_view_set_column_spacing(v.native(), C.gint(columnSpacing))
}
func (v *IconView) SetColumnSpacing(columnSpacing int) {
	C.gtk_icon_view_set_column_spacing(v.native(), C.gint(columnSpacing))
}
// SetColumnSpacing is a wrapper around gtk_icon_view_set_column_spacing().