gtk/icon_view.go
func (v *IconView) SetTooltipItem(tooltip *Tooltip, path *TreePath) {
	C.gtk_icon_view_set_tooltip_item(v.native(), tooltip.native(), path.native())
}
func (v *IconView) SetTooltipItem(tooltip *Tooltip, path *TreePath) {
	C.gtk_icon_view_set_tooltip_item(v.native(), tooltip.native(), path.native())
}
// SetTooltipItem is a wrapper around gtk_icon_view_set_tooltip_item().