* or report a subclass of {@link DOMRpcException} reporting a transport
* error.
*/
- // FIXME: 5.0.0: do not allow null input
+ // FIXME: 6.0.0: do not allow null input
@NonNull ListenableFuture<DOMRpcResult> invokeRpc(@NonNull DOMRpcIdentifier rpc,
@Nullable NormalizedNode<?, ?> input);