public function testSerializationDeserialization()
{
$obj = new Metadata(self::getJson());
$this->assertNotNull($obj);
$this->assertNotNull($obj->getCreatedDate());
$this->assertNotNull($obj->getCreatedBy());
$this->assertNotNull($obj->getCancelledDate());
$this->assertNotNull($obj->getCancelledBy());
$this->assertNotNull($obj->getLastUpdatedDate());
$this->assertNotNull($obj->getLastUpdatedBy());
$this->assertNotNull($obj->getFirstSentDate());
$this->assertNotNull($obj->getLastSentDate());
$this->assertNotNull($obj->getLastSentBy());
$this->assertNotNull($obj->getPayerViewUrl());
$this->assertEquals(self::getJson(), $obj->toJson());
return $obj;
}