gtk/icon_view.go
func (v *IconView) SetSpacing(spacing int) {
	C.gtk_icon_view_set_spacing(v.native(), C.gint(spacing))
}
func (v *IconView) SetSpacing(spacing int) {
	C.gtk_icon_view_set_spacing(v.native(), C.gint(spacing))
}
// SetSpacing is a wrapper around gtk_icon_view_set_spacing().