DocumentService::goToPreviewAction

public function goToPreviewAction($serviceCode, $attachedObjectId = null, $objectId = null, $versionId = null)
{
	$driver = Driver::getInstance();
	$handlersManager = $driver->getDocumentHandlersManager();
	$documentHandler = $handlersManager->getHandlerByCode($serviceCode);
	if (!$documentHandler)
	{
		$this->addError(new Error('There is no document service by code'));
	}

	if ($documentHandler instanceof OnlyOfficeHandler)
	{
		/** @see BitrixDiskControllerOnlyOffice::loadDocumentViewerAction() */
		return $this->forward(OnlyOffice::class, 'loadDocumentViewer', [
			'attachedObjectId' => $attachedObjectId,
			'objectId' => $objectId,
			'versionId' => $versionId,
		]);
	}
}