src/Neutrino/HttpClient/Request.php
public function setProxy($host, $port = 8080, $access = null)
    {
        $this->proxy = [
            'host'   => $host,
            'port'   => $port,
            'access' => $access,
        ];

        return $this;
    }
public function setProxy($host, $port = 8080, $access = null)
    {
        $this->proxy = [
            'host'   => $host,
            'port'   => $port,
            'access' => $access,
        ];

        return $this;
    }
Define proxy setting

@param string $host
@param int $port
@param string $access

@return $this