gtk/tree_view.go
func (v *TreeView) RowExpanded(path *TreePath) bool {
	return gobool(C.gtk_tree_view_row_expanded(v.native(), path.native()))
}
func (v *TreeView) RowExpanded(path *TreePath) bool {
	return gobool(C.gtk_tree_view_row_expanded(v.native(), path.native()))
}
// RowExpanded is a wrapper around gtk_tree_view_row_expanded().