{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"ty::Adt(adt_def,"}]}
            ty::Adt(adt_def, _) => Some(adt_def.did()),
        let def_id = match ty.kind() {
            ty::Alias(ty::Free, alias_ty) => Some(alias_ty.def_id),