Contao\ModuleRandomImage::generate PHP Method

    public function generate()
    {
        $this->multiSRC = \StringUtil::deserialize($this->multiSRC);
        if (!is_array($this->multiSRC) || empty($this->multiSRC)) {
            return '';
        }
        $this->objFiles = \FilesModel::findMultipleByUuids($this->multiSRC);
        if ($this->objFiles === null) {
            return '';
        }
        return parent::generate();
    }