{"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
                        let body = this.lower_const_body(i.span, expr.as_deref());
                            .lower_ty(ty, ImplTraitContext::Disallowed(ImplTraitPosition::ConstTy));
                        this.lower_define_opaque(hir_id, &define_opaque);