/**
* {@inheritdoc}
*/
protected function init()
{
parent::init();
if (!$this->source->isLocal() || $this->source->getWrapper() != 'plainfile') {
throw new RuntimeException('The source data must be a local file stream when uploading in parallel.');
}
if (empty($this->options['concurrency'])) {
throw new RuntimeException('The `concurrency` option must be specified when instantiating.');
}
}
