async Task ExecuteLoadFilmsCommand()
        {
            if (IsBusy)
            {
                return;
            }

            IsBusy = true;

            try
            {
                var filmsCount = await filmService.FilmsCount();

                pagesCount = (int)Math.Ceiling((double)filmsCount / AppConstants.PAGE_SIZE);

                FilmTreshold = 4;
                Films.Clear();
                var films = await filmService.GetAllFilms();

                Films.AddRange(films);
                FilteredFilms.AddRange(films);
            }
            finally
            {
                IsBusy = false;
            }
        }