{"ast_node_type":"variable","tokens":[{"end":50,"kind":"keyword","start":0,"text":"if"}]}
                        if let Some(index_trait) =
                    if let Some((f, _)) = self.result.method_resolutions.get_mut(&tgt_expr) {
                            LangItem::IndexMut.resolve_trait(self.db, self.table.trait_env.krate)