public PlanovanyTreninkModel(PlanovanyTreninkDTO planovanyTreninkDTO)
        {
            Id = planovanyTreninkDTO.Id;
            IdTrenera = planovanyTreninkDTO.IdTrenera;
            IdKlienta = planovanyTreninkDTO.IdKlienta;
            MistoKonani = planovanyTreninkDTO.MistoKonani;
            Potvrzen = planovanyTreninkDTO.Potvrzen;
            Poznamka = planovanyTreninkDTO.Poznamka;
            CasKonani = planovanyTreninkDTO.CasKonani;

        }
 public static async Task Save(PlanovanyTreninkModel currentSelection)
 {
     FirestoreDataMapper<PlanovanyTreninkDTO> firestoreDataMapper = new FirestoreDataMapper<PlanovanyTreninkDTO>();
     PlanovanyTreninkDTO planovanyTreninkDTO = new PlanovanyTreninkDTO(currentSelection.Id, 
                                                                         currentSelection.IdTrenera,
                                                                         currentSelection.IdKlienta,
                                                                         currentSelection.MistoKonani,
                                                                         currentSelection.Potvrzen,
                                                                         currentSelection.Poznamka,
                                                                         currentSelection.CasKonani.ToUniversalTime());
     await firestoreDataMapper.Update(planovanyTreninkDTO);
 }