public function addImageEntry()
 {
     $entry = new MediaEntry();
     $entry->name = self::ENTRY_NAME;
     $entry->mediaType = MediaType::IMAGE;
     $entry = $this->_client->getMediaService()->add($entry);
     $uploadToken = new UploadToken();
     $uploadToken->fileName = self::UPLOAD_IMAGE_FILENAME;
     $uploadToken = $this->_client->getUploadTokenService()->add($uploadToken);
     $uploadFilePath = dirname(__FILE__) . '/../resources/' . self::UPLOAD_IMAGE_FILENAME;
     $uploadToken = $this->_client->getUploadTokenService()->upload($uploadToken->id, $uploadFilePath);
     $resource = new UploadedFileTokenResource();
     $resource->token = $uploadToken->id;
     $entry = $this->_client->getMediaService()->addContent($entry->id, $resource);
     return $entry;
 }