public function testGeneratorStackedElement()
{
$generator = $this->getGenerator();
$generator->startDocument('test');
$generator->startObjectElement('element');
$generator->startObjectElement('stacked');
$generator->endObjectElement('stacked');
$generator->endObjectElement('element');
$this->assertSame('{"element":{"_media-type":"application\\/vnd.ez.api.element+json","stacked":{"_media-type":"application\\/vnd.ez.api.stacked+json"}}}', $generator->endDocument('test'));
}