eZ\Publish\Core\REST\Common\Output\Generator::getMediaType PHP Method

    public abstract function getMediaType($name);

 /**
  * Visit struct returned by controllers.
  *
  * @param \eZ\Publish\Core\REST\Common\Output\Visitor $visitor
  * @param \eZ\Publish\Core\REST\Common\Output\Generator $generator
  * @param \eZ\Publish\Core\REST\Common\Values\RestObjectState $data
  */
 public function visit(Visitor $visitor, Generator $generator, $data)
 {
     $generator->startObjectElement('ObjectState');
     $visitor->setHeader('Content-Type', $generator->getMediaType('ObjectState'));
     $visitor->setHeader('Accept-Patch', $generator->getMediaType('ObjectStateUpdate'));
     $generator->startAttribute('href', $this->router->generate('ezpublish_rest_loadObjectState', array('objectStateGroupId' => $data->groupId, 'objectStateId' => $data->objectState->id)));
     $generator->endAttribute('href');
     $generator->startValueElement('id', $data->objectState->id);
     $generator->endValueElement('id');
     $generator->startValueElement('identifier', $data->objectState->identifier);
     $generator->endValueElement('identifier');
     $generator->startValueElement('priority', $data->objectState->priority);
     $generator->endValueElement('priority');
     $generator->startObjectElement('ObjectStateGroup');
     $generator->startAttribute('href', $this->router->generate('ezpublish_rest_loadObjectStateGroup', array('objectStateGroupId' => $data->groupId)));
     $generator->endAttribute('href');
     $generator->endObjectElement('ObjectStateGroup');
     $generator->startValueElement('defaultLanguageCode', $data->objectState->defaultLanguageCode);
     $generator->endValueElement('defaultLanguageCode');
     $generator->startValueElement('languageCodes', implode(',', $data->objectState->languageCodes));
     $generator->endValueElement('languageCodes');
     $this->visitNamesList($generator, $data->objectState->getNames());
     $this->visitDescriptionsList($generator, $data->objectState->getDescriptions());
     $generator->endObjectElement('ObjectState');
 }