public Student(string firstName, string secondName, BirthInfo birthInfo, UniversityGroup universityGroup)
{
_firstName = firstName;
_secondName = secondName;
_birthInfo = birthInfo;
_universityGroup = universityGroup;
_subjects = new List<Subject>();
}
public void TranslateIntoGroup(UniversityGroup universityGroup)
{
_universityGroup = universityGroup;
}