private function createInvoiceDesigns()
 {
     $designs = ['Clean', 'Bold', 'Modern', 'Plain', 'Business', 'Creative', 'Elegant', 'Hipster', 'Playful', 'Photo'];
     for ($i = 0; $i < count($designs); $i++) {
         $design = $designs[$i];
         $fileName = storage_path() . '/templates/' . strtolower($design) . '.js';
         if (file_exists($fileName)) {
             $pdfmake = file_get_contents($fileName);
             if ($pdfmake) {
                 $record = InvoiceDesign::whereName($design)->first();
                 if (!$record) {
                     $record = new InvoiceDesign();
                     $record->id = $i + 1;
                     $record->name = $design;
                 }
                 $record->pdfmake = $pdfmake;
                 $record->save();
             }
         }
     }
 }