public function getControledLifetime($lifetime)
    {
        if (
            null !== $this->_instance_options['min_lifetime']
            && $this->_instance_options['min_lifetime'] > $lifetime
        ) {
            $lifetime = $this->_instance_options['min_lifetime'];
        } elseif (
            null !== $this->_instance_options['max_lifetime']
            && $this->_instance_options['max_lifetime'] < $lifetime
        ) {
            $lifetime = $this->_instance_options['max_lifetime'];
        }

        return $lifetime;
    }