public async Task <IEnumerable <SpecialityDTO> > GetByFacultyAsync(int facultyId)
{
return((await _specialityRepository.GetByFaculty(facultyId)
.Include(s => s.SpecialityByFaculty)
.OrderBy(s => s.Name)
.ToListAsync())
.Select(s => new SpecialityDTO(s)));
}