fetchMapLessons after Geo-pagination re-work

LessonService.swift

    func fetchMapLessons(around: CLLocation,
                         within: Double,
                         _ completionHandler: @escaping ([Any]?) -> Void) {

        let query = PFQuery(className: "ObjectClass")
            .addAscendingOrder("date")
            .whereKey("location",
                      nearGeoPoint: PFGeoPoint(location: around),
                      withinKilometers: within)

        query.findObjectsInBackground { (objects, error) in
            guard let obj = objects else {
                completionHandler(nil)
                return
            }

            var viewModelArray = [ObjectModel]()
            obj.forEach { o in
                if let model = ObjectModel(fromParseObject: o) {
                    viewModelArray.append(model)
                }
            }

            completionHandler(viewModelArray)
        }
    }