{"ast_node_type":"other","tokens":[{"end":7,"kind":"keyword","start":0,"text":"});"}]}
    });
        substitution: Substitution::from_iter(Interner, [receiver_ty.clone(), unsized_receiver_ty]),
    let goal = GoalData::DomainGoal(chalk_ir::DomainGoal::Holds(obligation)).intern(Interner);