ParaTest\Runners\PHPUnit\WrapperRunner::waitForStreamsToChange PHP Method

    private function waitForStreamsToChange($modified)
    {
        $write = array();
        $except = array();
        $result = stream_select($modified, $write, $except, 1);
        if ($result === false) {
            throw new \RuntimeException("stream_select() returned an error while waiting for all workers to finish.");
        }
        $this->modified = $modified;
        return $result;
    }