I'm currently using an observable in the following way:

```
this._socket.onMessage.subscribe(
    (message) => {

    }
);

```

which works fine! However, Would it be possible to pass a variable to the observable that would allow for some logic?

For example by passing a variable "name" to onMessage, I could subscribe only to events whos name is something specific? Like this:

```
this._socket.onMessage(name-variable).subscribe(
    (message) => {
        // only get events that is related to the name-variable
    }
);

```