public function testGetIndexedParameter()
 {
     $analytics = $this->analytics->setProtocolVersion('1')->setTrackingId('UA-26563724-11')->setClientId('555')->setDocumentPath('/')->setProductImpressionListName('list name', 1)->setProductImpressionListName('list test', 2);
     $this->assertEquals('1', $analytics->getProtocolVersion());
     $this->assertEquals('UA-26563724-11', $analytics->getTrackingId());
     $this->assertEquals('555', $analytics->getClientId());
     $this->assertEquals('/', $analytics->getDocumentPath());
     $this->assertEquals('list name', $analytics->getProductImpressionListName(1));
     $this->assertEquals('list test', $analytics->getProductImpressionListName(2));
     $this->assertEquals(null, $analytics->getProductImpressionListName(3));
 }