{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":".map(|ty|"}]}
        .map(|ty| expr_collector.lower_type_ref(ty, &mut ExprCollector::impl_trait_allocator));
        .ty()
    (expr_collector.store.finish(), expr_collector.source_map, params, bounds, type_ref)