def METHOD_NAME(self):
    plugin = KVK_KVKNumberPrefill(identifier="kvk")
    submission = SubmissionFactory()
    assert not submission.is_authenticated
    values = plugin.get_prefill_values(
        submission,
        [Attributes.bezoekadres_straatnaam, Attributes.kvkNummer],
    )
    expected = {}
    self.assertEqual(values, expected)