src/ClientBuilder.php
public function withGuzzleSender(GuzzleClientInterface $client = null)
    {
        $this->sender = $this->buildGuzzleSender($client);

        return $this;
    }
public function withGuzzleSender(GuzzleClientInterface $client = null)
    {
        $this->sender = $this->buildGuzzleSender($client);

        return $this;
    }
public function withGuzzleSender ( GuzzleClientInterface $ client = null ) { $ this -> sender = $ this -> buildGuzzleSender ( $ client ) ; return $ this ; }
Automatically generates a sender to use guzzle as a http client behind the scenes

IMPORTANT: you need to install 'guzzlehttp/guzzle' to use this feature

@param GuzzleClientInterface|null $client

@return $this
Automatically generates a sender to use guzzle as a http client behind the scenes