public function all_with_params()
{
$response = $this->contacts->all(['count' => 2, 'property' => ['firstname', 'lastname'], 'vidOffset' => 1234]);
$this->assertEquals(200, $response->getStatusCode());
$this->assertEquals(2, count($response->contacts));
// $this->assertNotNull($response->contacts[0]->properties->email->value);
// $this->assertNotNull($response->contacts[0]->properties->lastname->value);
$this->assertGreaterThanOrEqual(1234, $response->{'vid-offset'});
}