getMerchantId() public method

A user provided, optional convenvience field that functions as a unique identifier for the merchant on behalf of whom this credit card is being stored for. Note that this has no relation to PayPal merchant id
public getMerchantId ( ) : string
return string
 /**
  * @depends testSerializationDeserialization
  * @param CreditCard $obj
  */
 public function testGetters($obj)
 {
     $this->assertEquals($obj->getId(), "TestSample");
     $this->assertEquals($obj->getNumber(), "TestSample");
     $this->assertEquals($obj->getType(), "TestSample");
     $this->assertEquals($obj->getExpireMonth(), 123);
     $this->assertEquals($obj->getExpireYear(), 123);
     $this->assertEquals($obj->getCvv2(), "TestSample");
     $this->assertEquals($obj->getFirstName(), "TestSample");
     $this->assertEquals($obj->getLastName(), "TestSample");
     $this->assertEquals($obj->getBillingAddress(), AddressTest::getObject());
     $this->assertEquals($obj->getExternalCustomerId(), "TestSample");
     $this->assertEquals($obj->getMerchantId(), "TestSample");
     $this->assertEquals($obj->getPayerId(), "TestSample");
     $this->assertEquals($obj->getExternalCardId(), "TestSample");
     $this->assertEquals($obj->getState(), "TestSample");
     $this->assertEquals($obj->getCreateTime(), "TestSample");
     $this->assertEquals($obj->getUpdateTime(), "TestSample");
     $this->assertEquals($obj->getValidUntil(), "TestSample");
     $this->assertEquals($obj->getLinks(), LinksTest::getObject());
 }