{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"self.tcx.is_lang_item(pred.def_id(),"}]}
                                        self.tcx.is_lang_item(pred.def_id(), LangItem::Sized)
                                    ty::PredicateKind::Clause(ty::ClauseKind::Trait(pred)) => {
                                            && pred.polarity == ty::PredicatePolarity::Positive