MaxListenersExceededWarning when subscribing to worker’s observable: how to get an EventEmitter and setMaxListeners() on it?

I’m tracking status of certain entities, on which worker operates, this way:

In the worker, I keep one global dictionary with a `Subject` instance per each entity, and when operations happen on that entity I call `entities.next(newStatus)`.

In host (Electorn’s main), I list all entities to keep track of, and run `worker.streamEntityStatus(entityID).subscribe(doSometingWithStatus)` once for each in the beginning. (Status is then relayed to the renderer, etc.)

Once the user adds the 11th entity, though, there’s that warning:

> (node:5294) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 message listeners added to [Worker]. Use emitter.setMaxListeners() to increase limit

The docs say:

> This limit can be changed for individual EventEmitter instances using the emitter.setMaxListeners(n) method.

I suppose observable hides an EventEmitter instance somewhere, and it could be possible to get to it and setMaxListeners on it according to the number of entities I am tracking?