{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"|"}]}
            | hir::OpaqueTyOrigin::AsyncFn { parent: fn_def_id, .. } = origin
            if let hir::OpaqueTyOrigin::FnReturn { parent: fn_def_id, .. }
                && let hir::Node::TraitItem(trait_item) = tcx.hir_node_by_def_id(fn_def_id)