public async Task OnlyIdsShouldNotReturnDocuments()
{
var employee = await _employeeRepository.AddAsync(EmployeeGenerator.Generate(age: 20), o => o.ImmediateConsistency());
var results = await _employeeRepository.FindAsAsync <Identity>(o => o.OnlyIds());
Assert.Empty(results.Documents);
Assert.Null(results.Hits.First().Document);
Assert.NotNull(results.Hits.First().Id);
}