gtk/icon_view.go
func (v *IconView) SetItemWidth(width int) {
	C.gtk_icon_view_set_item_width(v.native(), C.gint(width))
}
func (v *IconView) SetItemWidth(width int) {
	C.gtk_icon_view_set_item_width(v.native(), C.gint(width))
}
// SetItemWidth is a wrapper around gtk_icon_view_set_item_width().