{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"if"}]}
            if let Some((single_subtree,)) = u.use_trees().collect_tuple() {
        let has_single_subtree_that_is_not_self = |u: &ast::UseTreeList| {
                // We have a single subtree, check whether it is self.