code: public function infoRead(int &$msgsInQueue = null):?CurlMultiInfoInterface {
  		$info = curl_multi_info_read(
  			$this->mh,
  			$msgsInQueue
  		);
  
  		if(!$info) {
  			return null;
  		}
  
  		return new CurlMultiInfo($info);
  	}
docs: Get information about the current transfers
  @see http://php.net/manual/en/function.curl-multi-info-read.php
  @throws CurlException on failure