Schema::table('tbl_notification_contents', function(Blueprint $table) {
            $table->foreign('notification_id', 'fk_notification_id')->references('id')->on('tbl_notifications')->onUpdate('NO ACTION')->onDelete('CASCADE');
            $table->foreign('lang_id', 'fk_notification_contents_lang')->references('id')->on('tbl_languages')->onUpdate('NO ACTION')->onDelete('CASCADE');
        });