How to use the baconjs.never function in baconjs

setFavoriteSongs: function() {
      return Bacon.never();
    }
  };

createNObservable('Bacon', 700, function(){
  return Bacon.never();
})

return send(req).flatMapLatest(function(res) {
    return Bacon.once(res).merge(
      res.next ? fetchAndFollow(send, token, res.next) : Bacon.never()
    );
  });
}

export function getCurrentRoute(routes) {
  return _.reduce(
    routes,
    function(p_route, stream, name) {
      return name === "errors" ? p_route : p_route.merge(stream.map(name));
    },
    Bacon.never()
  );
}

.flatMap(([a, b]) => {
        return b.time - a.time > DOUBLE_CLICK_THROTTLE_TIME
          ? b.filename
          : Bacon.never()
      })

export function getSongBeingPlayed(
  PlayController,
  p_radios,
  p_radio,
  playBus,
  autoplayRadio
) {
  const p_cmds = p_radio
    .merge(autoplayRadio ? Bacon.once(autoplayRadio) : Bacon.never())
    .toEventStream()
    .first()
    .map(radio => ({ type: "radio", radio: radio }))
    .merge(playBus)
    .toProperty();

  return PlayController.getSongBeingPlayed(p_radios, p_cmds);
}

.flatMap(function(packageAndDependencies) {
           if (collectPackage(packageAndDependencies)) {
             return Bacon.fromArray(packageAndDependencies.dependencies)
                         .flatMapConcat(resolveVersionAndDependencies)
           }
           return Bacon.never()
         })
}

var outOffMidi = off.flatMap(function(event) {
      var id = event.noteId
      if (!table[id]) return Bacon.never()
      var offMidiEvents = table[id]
      return Bacon.fromArray(offMidiEvents)
    })

.flatMap(([a, b]) => {
        return b && b.cell || Bacon.never()
      })