{"ast_node_type":"variable","tokens":[{"end":102,"kind":"keyword","start":0,"text":"let"}]}
                                        let assoc_ty = trait_items.iter().find_map(|item| match item {
                                        let trait_items = trait_.items_with_supertraits(sema.db);
                                            hir::AssocItem::TypeAlias(assoc_ty) => {