code: public function generate()
  	{
  		if ($this->singleSRC == '')
  		{
  			return '';
  		}
  
  		$objFile = FilesModel::findByUuid($this->singleSRC);
  
  		if ($objFile === null || !is_file(System::getContainer()->getParameter('kernel.project_dir') . '/' . $objFile->path))
  		{
  			return '';
  		}
  
  		$this->singleSRC = $objFile->path;
  		$this->objFilesModel = $objFile;
  
  		return parent::generate();
  	}
docs: Return if the image does not exist
  
  @return string