PayPal\Api\ErrorDetails::getPurchaseUnitReferenceId PHP Method

    public function getPurchaseUnitReferenceId()
    {
        return $this->purchase_unit_reference_id;
    }

 /**
  * @depends testSerializationDeserialization
  * @param ErrorDetails $obj
  */
 public function testGetters($obj)
 {
     $this->assertEquals($obj->getField(), "TestSample");
     $this->assertEquals($obj->getIssue(), "TestSample");
     $this->assertEquals($obj->getPurchaseUnitReferenceId(), "TestSample");
     $this->assertEquals($obj->getCode(), "TestSample");
 }