public void Remove_AddDoesNotExist_DoesNotAddElementToTheRepository(TestType value, Guid tag)
        {
            _orSetService.DownstreamRemove(value, new[] { tag });

            var repositoryValues = _repository.GetRemoves();
            var actualValues     = repositoryValues.Where(v => Equals(v.Value, value));

            Assert.Empty(actualValues);
        }