{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
                    let is_mentioned = fields.iter().any(|f| {
                for (f_index, with_field) in adt.non_enum_variant().fields.iter_enumerated() {
                        self.cx.typeck_results().opt_field_index(f.hir_id) == Some(f_index)