{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"[I::GenericArg::from(goal.predicate.self_ty())],"}]}
                            [I::GenericArg::from(goal.predicate.self_ty())],
                            cx.require_lang_item(TraitSolverLangItem::Sized),
                        );