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./othercms/xenForo 2.2.8/src/XF/Install/Upgrade/2000570-205.php
<?php

namespace XF\Install\Upgrade;

use
XF\Db\Schema\Alter;

class
Version2000570 extends AbstractUpgrade
{
    public function
getVersionName()
    {
        return
'2.0.5';
    }

    public function
step1()
    {
       
$this->schemaManager()->alterTable('xf_user_alert', function(Alter $table)
        {
           
$table->addColumn('depends_on_addon_id', 'varbinary', 50)->setDefault('');
        });
    }
}