private void FillDetails()
        {
            nameOfStudentTextBox.Text = $"{_student.FirstName} {_student.LastName}";
            dateOfBirthTextBox.Text   = _student.DateOfBirth.ToString("dd-MM-yyyy");
            genderTextBox.Text        = _student.Gender.ToString();
            gradeTextBox.Text         = _student.StudentGrade;

            foreach (var bookBorrow in _studentsRepository.GetBookBorrowsByStudentId(_student.StudentId))
            {
                borrowedBooksListBox.Items.Add(bookBorrow.Book.Name);
            }

            if (_studentsRepository.GetBookBorrowsByStudentId(_student.StudentId).Count == 0)
            {
                borrowedBooksListBox.Items.Add("Ucenik nije posudio nijednu knjigu");
            }
        }