/**
* @param Gajus\Fuss\SignedRequest $signed_request
*/
public function __construct(\Gajus\Fuss\SignedRequest $signed_request)
{
$payload = $signed_request->getPayload();
if (!isset($payload['page'])) {
throw new Exception\PageTabException('Signed request does not describe page tab.');
}
$this->page = $payload['page'];
}
