{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
        let trait_defines_associated_item_named = |trait_def_id: DefId| {
    ) -> Option<(Vec<ty::BoundVariableKind>, &'tcx ty::AssocItem)> {
            tcx.associated_items(trait_def_id).find_by_ident_and_kind(