gtk/gtk.go
func (v *ToolItem) SetVisibleHorizontal(visibleHorizontal bool) {
	C.gtk_tool_item_set_visible_horizontal(v.native(),
		gbool(visibleHorizontal))
}
func (v *ToolItem) SetVisibleHorizontal(visibleHorizontal bool) {
	C.gtk_tool_item_set_visible_horizontal(v.native(),
		gbool(visibleHorizontal))
}
// SetVisibleHorizontal is a wrapper around
// gtk_tool_item_set_visible_horizontal().