{"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"ty::Param(..)"}]}
            ty::Param(..) => (
            // impl<T: ?Sized> AutoTrait for T {}
                if self_ty.is_sized(tcx, ty::TypingEnv::non_body_analysis(tcx, impl_def_id)) {