{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"ItemKind::TyAlias(..)"}]}
        ItemKind::TyAlias(..) => errors::UnusedGenericParameterHelp::TyAlias { param_name },
        }
        item_kind => bug!("report_bivariance: unexpected item kind: {item_kind:?}"),