public function testSerializationDeserialization()
{
$obj = new ErrorDetails(self::getJson());
$this->assertNotNull($obj);
$this->assertNotNull($obj->getField());
$this->assertNotNull($obj->getIssue());
$this->assertNotNull($obj->getPurchaseUnitReferenceId());
$this->assertNotNull($obj->getCode());
$this->assertEquals(self::getJson(), $obj->toJson());
return $obj;
}