Can I create ngrx effect outside of a class, like in redux-observable?

Question

This is an ngrx effect taken from the official docs.

@Injectable()
export class AuthEffects {
  // Listen for the 'LOGIN' action
  @Effect() login$: Observable<Action> = this.actions$.ofType('LOGIN')
    // Map the payload into JSON to use as the request body
    .map(toPayload)
    .mergeMap(payload =>
      this.http.post('/auth', payload)
        // If successful, dispatch success action with result
        .map(data => ({ type: 'LOGIN_SUCCESS', payload: data }))
        // If request fails, dispatch failed action
        .catch(() => of({ type: 'LOGIN_FAILED' }))
    );

  constructor(
    private http: Http,
    private actions$: Actions
  ) {}      
}

Can I make it look more like this?

import {actions$, registerEffect} from ...


const login$: Observable<Action> = actions$.ofType('LOGIN')
    // Map the payload into JSON to use as the request body
    .map(toPayload)
    .mergeMap(payload =>
      this.http.post('/auth', payload)
        // If successful, dispatch success action with result
        .map(data => ({ type: 'LOGIN_SUCCESS', payload: data }))
        // If request fails, dispatch failed action
        .catch(() => of({ type: 'LOGIN_FAILED' }))
    );


registerEffect(login$);

Without the class and the angular references?

The idea is to reduce(ha!) the coupling between the effects and the angular framework. And I see no technical reason for that to not be possible.