How can I access a state using the same-id across multiple transformers, for example the following stores an Order object via ValueState in OrderMapper class:

```
env.addSource(source1()).keyBy(Order::getId).flatMap(new OrderMapper()).addSink(sink1());

```

Now I would like to access the same Order object via a SubOrderMapper class:

```
env.addSource(source2()).keyBy(SubOrder::getOrderId).flatMap(new SubOrderMapper()).addSink(sink2());

```

Edit: Looks like it's not possible to have state maintained across multiple operators, is there a way to have one operator accept multiple inputs, lets say 5 sources?