public void FindIncludesAllRelationsOfDriver()
        {
            var person = new Person();

            var driver = new Driver
            {
                Person = person
            };

            _sut.Add(driver);

            var driverFromDatabase = _sut.Find(d => d.Id == driver.Id).FirstOrDefault();

            Assert.That(driverFromDatabase.Person, Is.EqualTo(person));
        }