{"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
                    let mut enclosing_breakables = self.enclosing_breakables.borrow_mut();
                    // `ctxt` with the second `enclosing_breakables` borrow below.
                    match enclosing_breakables.opt_find_breakable(target_id) {