protected function _afterReset(KModelContextInterface $context)
    {
        $reset_columns = false;

        if ($context->modified)
        {
            if (in_array('search', $context->modified->toArray())) {
                $reset_columns = true;
            }
        }
        else $reset_columns = true;

        if ($reset_columns && ($key = array_search('ip', $this->_columns))) {
            unset($this->_columns[$key]);
        }
    }