gtk/tree_view.go
func (v *TreeView) ExpandToPath(path *TreePath) {
	C.gtk_tree_view_expand_to_path(v.native(), path.native())
}
func (v *TreeView) ExpandToPath(path *TreePath) {
	C.gtk_tree_view_expand_to_path(v.native(), path.native())
}
// ExpandToPath is a wrapper around gtk_tree_view_expand_to_path().