Client.php
public function getInfo($opt = null) {
		if (null === $opt) {
			return curl_getinfo($this->getCurl());
		}

		return curl_getinfo($this->getCurl(), $opt);
	}
public function getInfo($opt = null) {
		if (null === $opt) {
			return curl_getinfo($this->getCurl());
		}

		return curl_getinfo($this->getCurl(), $opt);
	}
Get information regarding a specific transfer
@param null|int $opt
@return array|string