Comos\Qpm\Supervision\Config::_initOnTimeout PHP Method

    private function _initOnTimeout($config)
    {
        $q = isset($config['onTimeout']) ? $config['onTimeout'] : null;
        if (\is_null($q)) {
            return $q;
        }
        if (!\is_callable($q)) {
            throw new \InvalidArgumentException('onTimeout must be callable');
        }
        $this->_onTimeout = $q;
    }